Relevant bibliographies by topics / Struvite

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Struvite'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Struvite.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Struvite"

1

Rech, Ioná, Paul Withers, Davey Jones, and Paulo Pavinato. "Solubility, Diffusion and Crop Uptake of Phosphorus in Three Different Struvites." Sustainability 11, no. 1 (December 27, 2018): 134. http://dx.doi.org/10.3390/su11010134.

Full text
Abstract:
Phosphate (P) fertilisers produced from waste recycling (e.g., struvite) are considered to be more sustainable than those conventionally produced from the processing of rock P (e.g., highly soluble triple superphosphate, TSP). In this study, we used 33P to monitor struvite dissolution and P diffusion into the soil in comparison to TSP. We evaluated three distinct chemical formulations of struvite, namely: (1) Crystal Green® (CG) produced in an industrial process from sewage sludge; (2) natural struvite (NS) precipitated in swine manure pipelines; and (3) laboratory precipitated struvite (PS) from chicken manure by a new process of P recovery. P diffusion was evaluated in soil columns over a 21-day period. This was complimented with a pot experiment in which wheat and soybean were cultivated in a Eutric Cambisol for 38 days in the presence of either struvite or TSP. P fertilisers were applied at a dose equivalent to 17.5 kg P ha−1 and fertiliser solubility determined by recovering soil solution. All three types of struvite tested showed reduced P solubility and mobility relative to TSP, but a comparison of the three struvites has shown that their P solubilities differed by a factor of two, with the greatest P release (up to 85% of total P) obtained from a struvite recovered from poultry manure and containing other useful nutrients (K, S and Ca). All struvites enhanced crop growth and P uptake of wheat and soybean relative to a nil P control, with up to 80% P recovery compared to TSP. These results further support the more widespread use of struvite as a sustainable source of P to plants despite its low water solubility.
APA, Harvard, Vancouver, ISO, and other styles
2

Ackerman, Joe N., Francis Zvomuya, Nazim Cicek, and Don Flaten. "Evaluation of manure-derived struvite as a phosphorus source for canola." Canadian Journal of Plant Science 93, no. 3 (May 2013): 419–24. http://dx.doi.org/10.4141/cjps2012-207.

Full text
Abstract:
Ackerman, J. N., Zvomuya, F., Cicek, N. and Flaten, D. 2013. Evaluation of manure-derived struvite as a phosphorus source for canola. Can. J. Plant Sci. 93: 419–424. There is growing interest in the treatment of swine manure to mitigate water quality issues related to phosphorus (P) from livestock operations. Precipitation of P as struvite (MgNH4PO4·6H2O) is a potential strategy to achieve this. The overall objective of this growth room study was to evaluate the effect of manure-derived struvite (MDS) on canola growth and P recovery efficiency. Pure struvite (PS), monoammonium phosphate (MAP), and polymer-coated monoammonium phosphate (PCMAP) were applied to canola plants in plastic pots containing 2 kg of a sandy loam soil. Biomass yields for MDS and PS were similar at all P rates (mean = 7.6 g pot−1) and significantly smaller than those for MAP and PCMAP (mean = 9.3 g pot−1). Differences in P uptake among P sources were detected at the highest P rate where P uptake was significantly greater for MAP and PCMAP (mean = 22.7 mg P pot−1) than for the struvite forms (mean = 16.4 mg P pot−1). Our results show that although P uptake was similar for the struvites and commercial fertilizers at P2O5 rates of 38 mg pot−1 or lower, biomass yield per unit of P taken up was smaller for the struvites. This may be due to lower initial solubility of the struvites in the alkaline (pH 7.7) soil used in this experiment, which gave an early stage growth advantage to canola fertilized with MAP and PCMAP. These results suggest that it may be necessary to supplement struvite with soluble P fertilizers, such as MAP, if applied on soils such as that tested in this study.
APA, Harvard, Vancouver, ISO, and other styles
3

Costa, Flávio Silva, Falko Langenhorst, and Erika Kothe. "Biomineralization of Nickel Struvite Linked to Metal Resistance in Streptomyces mirabilis." Molecules 27, no. 10 (May 10, 2022): 3061. http://dx.doi.org/10.3390/molecules27103061.

Full text
Abstract:
Biomineral formation is a common trait and prominent for soil Actinobacteria, including the genus Streptomyces. We investigated the formation of nickel-containing biominerals in the presence of a heavy-metal-resistant Streptomyces mirabilis P16B-1. Biomineralization was found to occur both in solid and liquid media. Minerals were identified with Raman spectroscopy and TEM-EDX to be either Mg-containing struvite produced in media containing no nickel, or Ni-struvite where Ni replaces the Mg when nickel was present in sufficient concentrations in the media. The precipitation of Ni-struvite reduced the concentration of nickel available in the medium. Therefore, Ni-struvite precipitation is an efficient mechanism for tolerance to nickel. We discuss the contribution of a plasmid-encoded nickel efflux transporter in aiding biomineralization. In the elevated local concentrations of Ni surrounding the cells carrying this plasmid, more biominerals occurred supporting this point of view. The biominerals formed have been quantified, showing that the conditions of growth do influence mineralization. This control is also visible in differences observed to biosynthetically synthesized Ni-struvites, including the use of sterile-filtered culture supernatant. The use of the wildtype S. mirabilis P16B-1 and its plasmid-free derivative, as well as a metal-sensitive recipient, S. lividans, and the same transformed with the plasmid, allowed us to access genetic factors involved in this partial control of biomineral formation.
APA, Harvard, Vancouver, ISO, and other styles
4

Edahwati, Luluk, Sutiyono, and Rizqi Rendri Anggriawan. "Pembentukan Pupuk Struvite dari Limbah Cair Industri Tempe dengan Proses Aerasi." Jurnal Teknologi Lingkungan 22, no. 2 (July 31, 2021): 215–21. http://dx.doi.org/10.29122/jtl.v22i2.4721.

Full text
Abstract:
ABSTRACT Struvite, also known as magnesium ammonium phosphate hexahydrate, is a white crystal with a chemical formula magnesium ammonium phosphate hexahydrate (MgNH4PO4.6H2O). Because of its phosphate content, struvite can be utilized as a fertilizer. Tempeh industrial effluent contains a high concentration of PO4, making it a possible struvite fertilizer producing material. The formation of struvite fertilizer is carried out by the aeration process. This process is able to increase the pH and homogeneity of the solution. The solution of Magnesium Ammonium Phosphate (MAP) is prepared by reacting tempeh industrial wasterwater, Magnesium Chloride (MgCl2), and Ammonium Hydroxide (NH4OH). The MAP ratios used are 1:1:1 and 3:1:1. The temperature was set at 30 °C and pH 9, the airflow rate was carried out at a rate of 0.25 - 1.25 liters per minute. Struvite crystals were analyzed using X-ray Fluorescence (XRF) and Scanning Electron Microscope (SEM). The best struvite fertilizer content is magnesium by 40.3% and phosphorus by 43.9% at an air flow rate of 1.25 liters per minute and a ratio of 3:1:1. Further development can be done by applying struvite fertilizers to plants. Keywords: aeration, crystallization, tempeh industrial wastewater, struvite ABSTRAK Struvite adalah kristal putih yang secara kimiawi dikenal sebagai magnesium amonium fosfat heksahidrat (MgNH4PO4.6H2O). Struvite dapat dimanfaatkan menjadi pupuk karena kandungan fosfat (PO4) di dalamnya. Limbah cair industri tempe memiliki kandungan PO4 yang cukup tinggi, menjadikan limbah cair industri tempe adalah bahan pembentuk pupuk struvite yang potensial. Pembentukan pupuk struvite dilakukan dengan proses aerasi. Proses ini mampu meningkatkan pH dan homogenitas dari larutan. Larutan MAP (Magnesium Amonium Fosfat) dibuat dengan cara mereaksikan limbah cair industri tempe, Magnesium Klorida (MgCl2), dan Amonium Hidroksida (NH4OH). Rasio MAP yang digunakan adalah 1:1:1 dan 3:1:1. Temperatur ditetapkan sebesar 30°C dan pH 9, laju alir udara dilakukan dengan laju 0,25 - 1,25 liter per menit. Kristal struvite dianalisis menggunakan Floresensi sinar-X (XRF) dan Mikroskop Pemindai Elektron (SEM). Kandungan pupuk struvite terbaik adalah magnesium sebesar 40,3% dan fosfor sebesar 43,9% pada konsentrasi 3:1:1 dan laju alir udara 1,25 liter per menit. Pengembangan lebih lanjut dapat dilakukan dengan mengaplikasikan pupuk struvite ke tanaman. Kata Kunci: aerasi, kristalisasi, limbah cair industri tempe, struvite
APA, Harvard, Vancouver, ISO, and other styles
5

Kemacheevakul, Patiya, Surawut Chuangchote, Sosuke Otani, Tomonari Matsuda, and Yoshihisa Shimizu. "Effect of magnesium dose on amount of pharmaceuticals in struvite recovered from urine." Water Science and Technology 72, no. 7 (June 19, 2015): 1102–10. http://dx.doi.org/10.2166/wst.2015.313.

Full text
Abstract:
Phosphorus (P) recovery was carried out through struvite precipitation from urines. Human urine, however, contains not only high nutrients for plants, such as P and nitrogen, but also pharmaceuticals and hormones. In this work, effects of magnesium (Mg) dose (in terms of Mg:P ratio) on P recovery efficiency and pharmaceutical amounts contained in struvite were investigated. Batch-scale experiments of synthetic and human urines revealed that struvite precipitation formed more X-shaped crystals with an increased molar ratio of Mg:P, while the amount of pharmaceuticals (tetracycline, demeclocycline, and oxytetracycline) in struvite decreased with an increased molar ratio of Mg:P. The lowest pharmaceutical amounts in struvite were found at the Mg:P ratio of 2:1 from both samples. Moreover, the maximum P recovery efficiency, quantity and purity of struvite were found in the range of 1.21 to 2:1. It indicated that the molar ratio of Mg:P has a significant impact on struvite precipitation in terms of pharmaceutical amounts in struvite; morphology, quantity and purity of struvite; and P recovery.
APA, Harvard, Vancouver, ISO, and other styles
6

LANG, DIANE BERNEATH. "Struvite Calculi." Radiology 193, no. 3 (December 1994): 702. http://dx.doi.org/10.1148/radiology.193.3.702.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

GLEESON, M. J., and D. P. GRIFFITH. "Struvite Calculi." British Journal of Urology 71, no. 5 (May 1993): 503–11. http://dx.doi.org/10.1111/j.1464-410x.1993.tb16015.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Rodman, JohnS. "Struvite Stones." Nephron 81, no. 1 (December 24, 1998): 50–59. http://dx.doi.org/10.1159/000046299.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Huang, Haiming, Qianwu Song, and Chunlian Xu. "Removal of ammonium from aqueous solutions using the residue obtained from struvite pyrogenation." Water Science and Technology 64, no. 12 (December 1, 2011): 2508–14. http://dx.doi.org/10.2166/wst.2011.811.

Full text
Abstract:
This paper reports the results of laboratory studies on the removal of ammonium from aqueous solutions using struvite pyrogenation residues. A series of experiments were conducted to examine the effects of the pyrogenation temperature (90–210 °C) and time (0.5–4 h) on the ammonium release of struvite. In addition, the pyrolysate of struvite produced at different pyrogenation temperatures and times was recycled for ammonium removal from aqueous solutions. The experimental results indicated that the ammonium release ratio of struvite increased with an increase in the pyrogenation temperature and time, and the struvite pyrolysate used as magnesium and phosphate source for ammonium removal was produced at the optimal condition of pyrogenation temperature of 150 °C for 1 h. Furthermore, experimental results showed that the optimum pH and pyrolysate dosage for ammonium removal from 100 ml synthetic wastewater (1,350 mg ammonium/L) were at pH 9 and 2.4 g of struvite pyrolysate, respectively, and initial ammonium concentration played a significant role in the ammonium removal by the struvite pyrolysate. In order to further reduce the cost of struvite precipitation, the struvite pyrolysate was repeatedly used for four cycles. The results of economic analysis showed that recycling struvite for three process cycles should be reasonable for ammonium removal, with ammonium removal efficiencies of over 50% and a reduction of 40% in the removal cost per kg NH4+.
APA, Harvard, Vancouver, ISO, and other styles
10

Graeser, Stefan, Walter Postl, Hans-Peter Berlepsch Bojar, Thomas Armbruster, Thomas Raber, Karl Ettinger, and Franz Walter. "Struvite-(K), KMgPO46H2O, the potassium equivalent of struvite a new mineral." European Journal of Mineralogy 20, no. 4 (August 29, 2008): 629–33. http://dx.doi.org/10.1127/0935-1221/2008/0020-1810.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Struvite"

1

Tarragó, Abella Elena. "Assessment of struvite and K-struvite recovery from digested manure." Doctoral thesis, Universitat de Girona, 2018. http://hdl.handle.net/10803/663399.

Full text
Abstract:
Human population has had an impact on the natural phosphorus’ cycle, a limited resource, and the predictions show that this resource could be exhausted in 100-250 years. Therefore, the actions for the coming 10-25 years must be focus on the recovery of phosphorus, for example, from renewable sources such as manure. Thus, phosphorus recovery as struvite or K-struvite from manure is investigated, as the recovery of the essential nutrients is considered to be a significant breakthrough for assuring long-term and economical phosphorus supply, while recovering a valuable slow-release fertilizer. Therefore, this PhD thesis proves the feasibility of recovering nutrients from manure, a complex matrix with high concentration of solids. Furthermore, aims to bring innovation and insights on the sustainable recovery of fertilizers (i.e. ammonium and/or potassium struvite) from swine manure
Els humans han tingut un impacte en el cicle natural del fòsfor, un recurs limitat, i són vàries les prediccions sobre la possible extinció d’aquest en 100-250 anys. Per tant, les accions a dur a terme durant els propers 10-25 anys haurien d’anar enfocades a la recuperació d’aquest, per exemple, a partir de fonts renovables com els purins. Així doncs, es planteja la recuperació de fòsfor en forma d’estruvita o K-estruvita a partir de purins, ja que la recuperació de nutrients essencials (nitrogen, fòsfor, potassi) es considera un avanç important i essencial per assegurar el subministrament de fòsfor econòmicament a llarg termini, al mateix temps que s’obté un fertilitzant d’alliberació lenta. En aquesta tesi doctoral s’ha demostrat la viabilitat de la recuperació de nutrients a partir de purins, una matriu complexa amb una elevada concentració de sòlids. També pretén aportar innovacions i reflexions sobre la recuperació sostenible de fertilitzants (estruvita i/o K-estruvita) a partir de purins
APA, Harvard, Vancouver, ISO, and other styles
2

Ezquerro, Ander. "Struvite Precipitation and Biological Dissolutions." Thesis, KTH, Mark- och vattenteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31451.

Full text
Abstract:
Struvite is a salt that is formed out of  Mg2+,NH4+ and PO43- and it crystallizes in form of MgNH4PO4.6H2O. Struvite‟s (magnesium ammonium phosphate or MAP) precipitation has recently been regarded as an interesting technique to remove phosphate and ammonium from waste water. The high elimination rates and the possibility of recycling the struvite as a direct slow release fertilizer make this process feasible and appealing. However, the costs due to the raw chemicals needed are drawbacks that leave aside the application of the process in some facilities. The MAP biological dissolution makes possible a recycling of magnesium and phosphate, a fact that reduces the process‟s costs and will help making it even more feasible and environmentally friend. This thesis goes also through the parameters, reactions and different techniques that optimize the struvite precipitation process.
APA, Harvard, Vancouver, ISO, and other styles
3

Le, Corre Kristell S. "Understanding struvite crystallisation and recovery." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/1434.

Full text
Abstract:
Struvite crystallisation from wastewater effluents is seen as an alternative to traditional biological and chemical phosphorus removal processes used widely in the wastewater treatment industry. It presents the advantage of not only removing phosphorus but also generating a compound that could be reused as a fertiliser. However the application of struvite crystallisation processes at full scale is not widespread due to the unknown economical value of the process and the product, the need of pH control, the necessity of long operational times to ensure quality of the product and the formation of crystal fines. Preliminary crystallisation experiments were carried out at laboratory scale to provide a better understanding of nucleation and growth processes, and identify how basic parameters such as pH, mixing energy, water chemistry or presence of foreign ions affected struvite crystallisation. Particular attention was paid to the quality (i.e. size, shape and purity) of the crystal formed. The results revealed that the presence of calcium ions in solution could alter struvite purity and even inhibit its formation. pH was also identified as a parameter of major impact on struvite crystal quality. Indeed, pH could either influence struvite purity or affect size of crystals formed. Further investigations in a purposely built reactor also revealed that if struvite crystallisation is relatively simple to achieve, the control of struvite quality and more particularly crystal size is complex. Results at pilot scale showed that reactor operation and struvite surface charge could be a limitation to its agglomerative properties, hence to the formation of larger crystals. To optimise struvite crystallisation and limit the problem of fines formation the present study has investigated two possible solutions: struvite fines recovery by coagulation or struvite crystallisation on seed materials. Struvite coagulation proved to be an efficient solution to remove and recover struvite fines rapidly through floc formation. Of the coagulant tested, polyDADMAC was the most effective resulting in the formation of flocs 10 times bigger than the initial size of crystals. With regards to crystallisation on seed materials, the results revealed that success of struvite attachment onto seeds in short contact times was only efficient when mixing energy in the reactor was limited. In that sense, the submersion of a metallic system in the reactor allowed excellent phosphorus removal and rapid struvite recovery in only 2 hours of operation.
APA, Harvard, Vancouver, ISO, and other styles
4

Farhana, Sharmeen. "Thermal decomposition of struvite : a novel approach to recover ammonia from wastewater using struvite decomposition products." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54180.

Full text
Abstract:
Ammonia recovery technology, utilizing newberyite (MgHPO₄.3H₂O) as a struvite (MgNH₄PO₄.6H₂O) decomposition product, is gaining interest as usage of newberyite can significantly reduce the cost of commercial reagents, by providing readily available magnesium and phosphate for struvite reformation. In this study, the efficiency of ammonia removal from struvite, and a transformation process of struvite to newberyite, were investigated through performing oven dry, bench-scale and pilot-scale experiments. In the oven dry experiments, the structural and compositional changes of synthetic struvite, upon decomposition, were evaluated. Around 60-70% ammonia removal efficiency was achieved through struvite thermal decomposition above 60º±0.5ºC, with up to 71.1ºC with prolonged heating. The 2D amorphous layered structure, present in the decomposed solid phase, entrapped around 30-40% residual ammonia between the layers of magnesium and phosphate, inhibiting further ammonia removal. Subsequently, bench-scale experiments were conducted based on the hypothesis that humid air can prevent the formation of a layered structure including dittmarite (MgNH₄PO₄.H₂O) and an amorphous 2D layered structure. Struvite pellets of different sources and sizes were heated in a fluidized bed reactor in the presence of hot air and steam. Introduction of steam resulted in complete transformation of struvite pellets (<1mm) into newberyite at 80ºC, 95% relative humidity and 2 hours of heating. Finally, pilot-scale experiments were carried out to further optimize the operating conditions for industrial application. The smaller and softer pellets (size <1mm, hardness 300-500 g) were the best suited for struvite-to-newberyite conversion. The process was optimized further by narrowing down the relative humidity from 95% to 85% and reducing the heating duration from 2 to 1.5 hours. The operating cost of the pilot-scale process was estimated, which can be reduced through recycling the heat and moist air over the cycle. The number of cycles for which the decomposed product can be effectively reused depends on the required overall N-recovery efficiency, as well as the performance of the struvite recrystallization stage. The greatest advantage of the proposed technology, over other recovery methods, is that the operating costs can be turned into revenue by utilizing the recovered product as fertilizer or energy source.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
APA, Harvard, Vancouver, ISO, and other styles
5

Bennett, Aline Miriam. "Potential for potassium recovery as K-struvite." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54296.

Full text
Abstract:
Crystallization of NH₄-struvite (MgNH₄PO4:6H₂O) pellets has proven to be a successful method of recovering nitrogen and phosphorus from wastewaters. Thus far, little work has been done on potassium recovery since it is not considered a water pollutant, nor do we face potassium shortages. However, potassium is an essential plant macronutrient and we are seeing worldwide imbalances in nutrient and fertilizer use, as well as a need for a slow release potassium fertilizer. Development of a full complement NPK fertilizer with NH₄-struvite and K-struvite components may have great potential. Given this, research into potassium recovery through crystallization of K-struvite (MgKPO₄: 6H₂O) is relevant and complements previous work done with NH₄-struvite. The goals of this research were to develop fundamental understanding of K-struvite formation as the first step to recovering potassium, and eventually produce a full complement NPK slow-release fertilizer from wastewaters. This required the determination of new solubility product values for K-struvite at different temperatures, followed by bench-scale experiments to assess K-struvite synthesis under various solution conditions. A model to simulate each batch experiment and to predict optimal supersaturation conditions for K-struvite precipitation was developed using PHREEQC, aqueous equilibrium modelling software. Finally, initial experiments in the UBC fluidized bed reactor (UBC-FBR) were undertaken to assess the pelletization potential of K-struvite. New solubility product values for K-struvite indicate that it is less soluble than previously reported, and the values determined at 10, 25 and 35°C fit the Van’t Hoff model. Optimal Mg:K:P molar ratio for synthesis of pure K-struvite was found to be approximately 3:50:1 in a wastewater matrix with pH 8, P-PO₄ concentration of 8 mM and a Mg:P ratio of 3:1. These concentrations were used in the UBC-FBR to assess the pelletization potential of K-struvite. These initial reactor runs were inconclusive due to an inability to stabilize the reactor without seeding. It would be recommended to seed the reactor during start-up in order to be able to compare process performance with the NH₄-struvite crystallization process in the UBC-FBR. This study showed that formation of pure K-struvite is possible given the right supersaturation conditions in solution, requiring high potassium concentrations.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
APA, Harvard, Vancouver, ISO, and other styles
6

Zhang, Chi. "Struvite Precipitation of Ammonia from Landfill Leachate." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34492.

Full text
Abstract:
The application of struvite (magnesium ammonium phosphate,!MgNH&PO& ∙ 6H+O) precipitation and its recycling use for the purpose of ammonia removal from both synthetic solutions and landfill leachate were investigated in this study. The results demonstrated that chemical precipitation by struvite formation is efficient for ammonia removal from aqueous solutions. In addition, by recycling the thermal residue of struvite, continuously removing ammonia can technically be achieved. In the struvite precipitation, ammonia removal significantly depended on the pH and chemical molar ratios of NH& ,:!Mg+,:!PO& ./. For synthetic solution (TAN=1,000 mg/L), remarkable TAN removal efficiency of over 98% has been reported when the molar ratio of NH& ,:!Mg+,:!PO& ./ equals 1.0:1.2:1.2, 1.0:1.3:1.3, 1.0:1.3:1.4 and 1.0:1.5:1.5 at optimum pH 9. The optimum combinations of reagents applied in landfill leachate (TAN=1,878 mg/L) were!NH& ,:!Mg+,:!PO& ./ =1.0:1.3:1.3, 1.0:1.4:1.3, 1.0:1.5:1.4 and 1.0:1.5:1.5 at optimum pH 9.5, all of which displayed excellent TAN removal efficiencies of over 99%. Response surface method (RSM) helped to analyze the data and optimize the results. The struvite pyrolysate provided best performance of removing ammonia in both simulated wastewater and landfill leachate at a dosage of 60 g/L, when struvite was previously heated at 105 􀀁 by oven for 2.5 h. In the recycling phase, the struvite pyrolysate resulting from NaOH-mediated pyrolysis was more effective at continuously treating ammonia synthetic solution than was direct heating, with an initial mode of 87.4% at the beginning to 75.1% in the fifth round and direct heating of struvite from 80.9% in the first cycle and 60.6% in the final cycle. The struvite pyrolysate formed by NaOH-mediated pyrolysis performed with greater ability to continuously eliminate ammonia from landfill leachate (97.2% removal at the beginning and 72.3% in the fifth round), than did directly heated struvite (98.4% in the first cycle and 81.3% in the final cycle). Additionally, microwave irradiation could also dissociate struvite, which subsequently demonstrated moderate TAN removal in recycling phases.
APA, Harvard, Vancouver, ISO, and other styles
7

Ackerman, Joe. "Reclaiming phosphorus as struvite from hog manure." Ackerman, J. N., and N. Cicek. 2011. Phosphorus removal and recovery from hog lagoon supernatant using a gravity-settled batch reactor and increased pH. Biological Engineering Transactions 4(4): 207-218, 2011. http://hdl.handle.net/1993/14914.

Full text
Abstract:
The over application of manure phosphorus (P) to farmlands can lead to P build up in the soil and eventual runoff to surface waters causing eutrophication. Reducing P in manure by precipitation of struvite enables P capture and reuse as a fertilizer in the agricultural supply stream. Struvite precipitation is dictated by levels of soluble P which can be highly variable according to manure treatment and management. This research studied P forms in liquid pig manure, ways of increasing P-PO4 levels in manure from strategic storage conditions, novel struvite reactors, and the effectiveness of struvite as a fertilizer. Studies that monitored soluble nutrients during manure storage revealed that P-PO4 concentration was sensitive to pH and time. Anaerobic fermentation of manure increased P-PO4 by 2.5 fold with 12 days of storage, provided the buffering by alkalinity was low. Two different struvite reactors were operated, a batch-type system for processing lagoon supernatant and an upflow air sparged reactor that used supernatant from a rotary press solids separator. They achieved 75% and 31% total P removal, respectively. The upflow reactor operated without chemical addition at pH 6.8 to produce high purity struvite free of calcium phosphates. Costs of both reactors were comparable ($0.0139 and $0.0167/kg live pig wt) and similar to other pilot struvite reactors. Manure derived struvite was compared with pure struvite and commercial fertilizer for agronomic value in canola production. Results of a greenhouse pot experiment showed no significant difference between the two struvites despite impurities in the manure precipitate.
APA, Harvard, Vancouver, ISO, and other styles
8

Sellaturay, S. V. "Physico-chemical basis for struvite stone formation." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1336882/.

Full text
Abstract:
Introduction: Struvite stones (magnesium ammonium phosphate) account for 10-15% of renal stones and can grow rapidly forming staghorn calculi. With limited medical therapies available and surgery the mainstay of treatment, an understanding of the physico-chemical conditions causing struvite crystallization allows development of strategies to prevent their formation. At present, very little is known about the physico-chemical conditions that result in struvite crystallisation. This lack of understanding has two bases: i) the particular ionised concentrations of the reactants (e.g. Mg2+, NH4+, and phosphate) in the urine are unknown; ii) the prevailing chemical conditions that would modulate crystallisation are also unclear (e.g. pH, osmolality, other urinary constituents).Recent advances in the development of ion-selective electrodes allows accurate determination of urinary constituents in small (<1ml) undiluted samples. Methods: We have furthered developed an NH4+-ion selective electrode and magnesium ion-selective electrode to measure the urinary concentrations of each to aid our understanding of struvite deposition. [NH4+] and [Mg2+] were measured using plastic dip cast ion-selective electrodes dispersed in suitable plasticisers, using nonactin for NH4+ and several different neutral ligands for Mg2+. Data were validated against standardised and developing methodology, including colour spectrophotometry and computational algorithms. Urine samples were also subjected to analysis using clinical biochemical techniques. Results: We characterised an NH4+-ion selective electrode and made the first measurements of [NH4+] in undiluted urine samples, in normal subjects and those with stone disease. This technique was validated using colour spectrophotometry and then the technique was used to validate a computational algorithm. We have developed and characterised the Mg2+-ion-selective electrode but Ca2+ caused significant interference. Conclusions: Direct measurement of the urinary [NH4+] has been achieved for the first time with a value of about 25mM. This exciting new technique may now provide clinicians with an important point-of-care investigative tool in diagnosing and monitoring struvite calculogenesis.
APA, Harvard, Vancouver, ISO, and other styles
9

Doyle, J. D. "Struvite formation and control in wastewater treatment." Thesis, Cranfield University, 2002. http://dspace.lib.cranfield.ac.uk/handle/1826/11427.

Full text
Abstract:
Struvite causes maintenance, and operational problems due to fouling in wastewater and sludge treatment systems. Struvite formation was initially investigated using a series of jar tests on real and synthetic sludge liquors. A computer model predicting struvite precipitation potential was compared to the results generated. Struvite formation was found to be closely linked to pH with increasing pH resulting in decreasing struvite solubility. Further studies analysed the relationship between a solutions' supersaturation ratio, material and the scaling rate. Tests were undertaken at 3 supersaturation ratios with 3 different materials: stainless steel, Teflon and acrylic. Acrylic and Teflon coupons were scientifically roughened to show the influence that surface roughness has on a materials' scaling propensity. The control of struvite precipitation was investigated using a range of chemical inhibitors and chelating agents. Experiments using the same materials used previously were performed with a range of scale inhibitors and chelating agents. The scale inhibitors did not prevent struvite from forming, with only one product, Polystabilis, showing a reduction in the mass of scale formed on the impellers. Of the chelating agents tested, EDTA was the most effective even in alkaline conditions and was shown to have the ability to re-dissolve struvite previously formed on materials.
APA, Harvard, Vancouver, ISO, and other styles
10

Ramaru, Rendani. "Phosphate precipitation as struvite from municipality wastewater." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/5412.

Full text
Abstract:
Tshwane Municipality produces approximately 4Ml/day of dewatering liquors arising from municipal sludge from a wastewater treatment plant. The sludge being dewatered is a combination of an anaerobically digested primary sludge and an undigested waste activated sludge. High phosphate and nitrogen are released into water during the anaerobic treatment process. High concentrations of these nutrients in the wastewater lead to eutrophication, which is a major environmental problem (Doyle et al., 2000). In view of the above problem, the aim of this project was to investigate the feasibility of precipitating phosphate in the form of struvite (MgNH4PO4.6H2O) from the Tshwane Municipality dewatering liquors and consequently recovering it as a valuable and marketable product. The project was investigated in three sequential stages consisting of: 1. An aqueous thermodynamic modelling study using OLI Systems Inc. Stream Analyser Version 2.0.57 to determine the precipitation conditions required for the removal of phosphates in the dewatering liquor. 2. Bench'scale laboratory experiments to investigate the feasibility of phosphate precipitation as struvite under different pH conditions, Mg: P molar ratios and Ca:P molar ratios. 3. Fluidised bed experiments to establish the characteristics of phosphate removal at varying levels of supersaturation. The results suggest that the pH of the system has a significant effect on phosphate removal due to its influence on the availability of PO4 3, NH4 + and Mg2+. According to the thermodynamic modelling results, phosphates are removed as Ca3(PO4)2 and Mg3(PO4)2.8H2O. Removal of phosphate as Mg3(PO4)2.8H2O starts at a pH above 7 with the maximum removal achieved at pH 10. Thereafter, phosphate removal as Mg3(PO4)3.8H2O drops to zero due to Mg(OH)2 precipitation being favoured at the higher pH values. Thermodynamic modelling shows that a high NH4 +:P molar ratio is required to induce struvite precipitation. For sample C1, which had a PO4 P and an NH4 + concentrations of 145mg/L and 65mg/L respectively, the bench scale experiments showed that approximately 30%, 80% and 92% of the phosphate was removed at pH 8, pH 9 and pH 10, respectively. The NH4 +:P molar ratio in ii the precipitate decreased to zero at pH 10 because NH3 formation is favoured at this pH. The XRD analysis showed that the precipitate was Mg3(PO)2.22H2O. On the other hand, it was shown that phosphate was removed as struvite, for sample C2, which had PO4 P and NH4 + concentrations of 93mg/L and 57 mg/L, respectively. The NH4 +: P molar ratio of sample C1 was 0.99 while the NH4 +: P molar ratio of sample C2 was 1.35. However, it was shown that phosphate was removed as Mg3(PO)2.22H2O under pH 10 conditions. Thus, high NH4 +: P molar ratios (i.e. 1.35) in the waste water favours struvite precipitation with the optimum pH level for phosphate removal as struvite being pH 9. Bench scale experiments showed that, amorphous calcium phosphate precipitation is favoured over struvite precipitation at high Ca:P molar ratios. At a Ca:P molar ratio of 0.85:1, it was shown that no struvite was formed. The bench scale experiments showed that the phosphate conversion increased at high Mg:P molar ratios. However, the effect of increasing Mg:P molar ratio on phosphate conversion was significant at pH 9. While at pH 10 there was insignificant increase of phosphate conversion as Mg:P molar ratio was increased probably due to formation of MgOH+ ions at high pH levels. It was shown that high Mg:P molar ratios slightly limits calcium conversion. The calcium conversion was reduced by approximately 10% when Mg: P was increased from 1:1 to 1.4:1 for systems operated at pH 9 and pH 10 conditions. The supersaturation ratio of amorphous calcium phosphate is 104 greater than the magnesium compounds (i.e. struvite and Mg3(PO4)2.22H2O) supersaturation ratio as a result the effect of increasing Mg:P on calcium conversion was relatively very small. The fluidized bed reactor experiments showed that high Mg:P molar ratios increased the phosphate removal as a result of the increased free Mg2+ concentration. However, the high Mg:P molar ratios resulted in an increased supersaturation which led to the formation of many fine particles. There was an increase in overall conversion from 68% to 83 % when the Mg:P molar ratio was increased from 1:1 to 1.2:1. On the other hand, the removal decreased from 45% to 38% when the Mg:P molar ratio was increased from 1:1 to 1.2:1. Moreover, struvite with high purity was produced at a high Mg:P molar ratios (i.e. Mg:P =1.2). Fluidized bed reactor experiments showed that as the recycle ratio was increased the PO4 P conversion also increased. Thus, large amount of struvite particles were recycled to the fluidized bed reactor. As a result, struvite particles provide favourable nucleation sites for struvite precipitation hence high conversion were achieved at higher recycle ratio.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Struvite"

1

Narbut, A. N. Struve. Moskva: [s.n.], 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Struve. Moskva: [s.n.], 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Narbut, Andreĭ Nikolaevich. Struve. Moskva: s. n., 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kantor, V. K., and Olʹga Zhukova. Petr Berngardovich Struve. Moskva: ROSSPĖN, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Balyshev, M. A. Otto Li︠u︡dvigovich Struve, 1897-1963. Moskva: Nauka, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Pëtr Struve: Revoli︠u︡t︠s︡ioner bez mass 1870-1918 : prilozhenie : novoe sobranie sochineniĭ P.B. Struve (1903-1917). Moskva: Izdatelʹstvo knizhnogo magazina "T︠S︡iolkovskiĭ", 2020.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Petr Berngardovich Struve: Zhiznʹ, borʹba, tvorchestvo. 2nd ed. Sankt-Peterburg: Izdatelʹstvo SPbGAVM, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Petr Berngardovich Struve: Zhiznʹ, borʹba, tvorchestvo. 2nd ed. Sankt-Peterburg: Izdatelʹstvo SPbGAVM, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

1870-1944, Struve Petr Berngardovich, ed. Iznutri: Pisʹma Berdi︠a︡eva, Bulgakova, Novgorodt︠s︡eva i Franka k Struve, perepiska Franka i Struve (1898-1905 / 1921-1925). Moskva: Izdanie knizhnogo magazina "T︠S︡iolkovskiĭ", 2018.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Struve, Otto. O.V. Struve--Dzh.V. Skiaparelli: Perepiska 1859-1904. Sankt-Peterburg: Nauka, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Struvite"

1

Eisner, Brian H., Sameer M. Deshmukh, and Dirk Lange. "Struvite Stones." In Urinary Stones, 48–56. Oxford: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118405390.ch5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Rodman, John S. "Struvite Stones." In Renal Stone Disease, 225–51. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-2069-2_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mutter, Walter P. "Struvite Stones." In Nutritional and Medical Management of Kidney Stones, 133–39. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15534-6_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Nickel, J. C. "Bacterial Ecology in Struvite Calculogenesis." In Urolithiasis, 275–76. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-0873-5_84.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Chew, Ben H., Ryan Flannigan, and Dirk Lange. "Struvite Stones, Diet and Medications." In Pocket Guide to Kidney Stone Prevention, 101–10. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11098-1_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Stroup, Sean P., and Brian K. Auge. "Urinary Infection and Struvite Stones." In Urinary Tract Stone Disease, 217–24. London: Springer London, 2010. http://dx.doi.org/10.1007/978-1-84800-362-0_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Esen, Tarık, and Tayfun Oktar. "Medical Management of Struvite Stones." In Urinary Tract Stone Disease, 681–86. London: Springer London, 2010. http://dx.doi.org/10.1007/978-1-84800-362-0_58.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Espinosa-Ortiz, Erika J., and Robin Gerlach. "Struvite Stone Formation by Ureolytic Biofilms." In The Role of Bacteria in Urology, 61–70. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17542-9_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Sutton, R. A. L., J. F. Dufton, and A. Halabe. "Factitious Struvite Stones — A Case Report." In Urolithiasis, 317–18. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-0873-5_101.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Koga, Daisuke. "Struvite Recovery from Digested Sewage Sludge." In Phosphorus Recovery and Recycling, 255–64. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8031-9_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Struvite"

1

Purnomo, Chandra Wahyu, Yohanes Nico Marpaung, Sieng Sreyvich, Ilma Fadlilah, and Himawan Tri Bayu Murti Petrus. "Struvite precipitation using continuous flow reactor." In THE 11TH REGIONAL CONFERENCE ON CHEMICAL ENGINEERING (RCChE 2018). Author(s), 2019. http://dx.doi.org/10.1063/1.5094983.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Rathod, K. R., B. V. Jogiya, C. K. Chauhan, and M. J. Joshi. "Synthesis and characterization of struvite nano particles." In NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4917772.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Purnomo, Chandra Wahyu, Novita Puteri Kusumawardhani, and Yohanes Nico Marpaung. "Phosphate recovery from dairy urine by struvite crystallization." In THE 3RD INTERNATIONAL SEMINAR ON CHEMISTRY: Green Chemistry and its Role for Sustainability. Author(s), 2018. http://dx.doi.org/10.1063/1.5082409.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Militaru, Bogdan Adrian. "PHOSPHORUS RECOVERY AS STRUVITE FROM SEWAGE SLUDGE ASH." In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/4.1/s18.095.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Prabakharan, Sabitha, Joel M. H. Teichman, Scott S. Spore, Edmund Sabanegh, Randolph D. Glickman, and Robert J. C. McLean. "Proteus mirabilis viability after lithotripsy of struvite calculi." In BiOS 2000 The International Symposium on Biomedical Optics, edited by R. Rox Anderson, Kenneth E. Bartels, Lawrence S. Bass, C. Gaelyn Garrett, Kenton W. Gregory, Nikiforos Kollias, Harvey Lui, et al. SPIE, 2000. http://dx.doi.org/10.1117/12.386261.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ohlinger, K. N., and R. J. Mahmood. "Struvite Scale Potential Determination Using a Computer Model." In World Water and Environmental Resources Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40685(2003)267.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Sidorczuk, Dominik, Łukasz Kołodziejczyk, Katarzyna Pernal, and Jolanta Prywer. "Experimental-Computational Approach to Investigate Elastic Properties of Struvite." In The 2nd International Online Conference on Crystals. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/iocc_2020-07336.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Keith E Bowers, Tianxi Zhang, and Joseph H Harrison. "Phosphorus Removal by Struvite Crystallization in Various Livestock Wastewaters." In International Symposium on Air Quality and Waste Management for Agriculture, 16-19 September 2007, Broomfield, Colorado. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2007. http://dx.doi.org/10.13031/2013.23824.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wang, Chong-Chen, and Xiao-Di Hao. "Small-Scale Formation of Struvite by Electrochemical Deposition and Its Characterization." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163406.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

"Impact of Magnesium Source on the Yield and Structure of Struvite." In Nov. 16-17, 2020 Johannesburg (SA). Eminent Association of Pioneers, 2020. http://dx.doi.org/10.17758/eares10.eap1120225.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Struvite"

1

Burns, Robert T., Lara Moody, and Tim Shepherd. Concentration and Extraction of Phosphorous from Swine Manure Slurries (as Struvite). Ames (Iowa): Iowa State University, January 2006. http://dx.doi.org/10.31274/ans_air-180814-897.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

HILL, KATIE, and CHRISTINE LANGTON. ETF GROUT EXPANSION: EFFECTS OF DIFFERENT SLAGS AND STRUVITE PRECIPITATION PROTOCOLS (STIRRING TIME). Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1898100.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Thompson, Louis B., Antonio P. Mallarino, and Kenneth T. Pecinovsky. Crop Response to Phosphorus in Fertilizer and Struvite Recovered from Corn Fiber Processing for Bioenergy. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/farmprogressreports-180814-332.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

de Vries, Sander, Romke Postma, Laura van Scholl, Greet Blom-Zandstra, Jan Verhagen, and Imke Harms. Economic feasibility and climate benefits of using struvite from the Netherlands as a phosphate (P) fertilizer in West Africa. Wageningen: Wageningen Plant Research, 2016. http://dx.doi.org/10.18174/417821.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ehlert, P. A. I., T. A. van Dijk, and O. Oenema. Opname van struviet als categorie in het Uitvoeringsbesluit Meststoffenwet : advies. Wageningen: Wettelijke Onderzoekstaken Natuur & Milieu, 2016. http://dx.doi.org/10.18174/394872.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Struvite' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography