Relevant bibliographies by topics / Piggery. eng

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Academic literature on the topic 'Piggery. eng'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Piggery. eng"

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Nara, Matsunori, and Xiaoyi Zhao. "Method of Power Generation after Hydrogen is Produced with Piggery Wastewater." Engineering 04, no. 10 (2012): 50–52. http://dx.doi.org/10.4236/eng.2012.410b013.

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Gavala, H. N., I. V. Skiadas, Nikolaos A. Bozinis, and G. Lyberatos. "Anaerobic codigestion of agricultural industries' wastewaters." Water Science and Technology 34, no. 11 (December 1, 1996): 67–75. http://dx.doi.org/10.2166/wst.1996.0264.

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Wastewaters generated from agricultural industries are usually hard to treat due to a high organic content. The basic treatment process to be used can only be anaerobic digestion, a process with the additional advantages of (i) limited production of stabilized sludge and (ii) utilization of the produced biogas. The cotreatment of such seasonally produced wastewaters is proposed in order to secure the economically favorable and stable year-round operation of a treatment plant, with the additional benefits of smaller capital costs (due to the use of centrally located rather than distributed treatment facilities) and the exploitation of complementarity in waste characteristics (e.g. avoidance of nutrients (N,P) addition when a codigested wastewater contains nutrients in excess). A mathematical model for codigesting piggery, olive-mill and dairy wastewaters was developed based on batch kinetic experiments. An organic loading rate of 3.84 g COD/l·d was found to be safe for a digester operating on a year-round basis, fed sequentially with piggery, piggery-olive-mill and piggery-dairy wastewaters.
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Smiles, D. E., and C. J. Smith. "Absorption of artificial piggery effluent by soil: A laboratory study." Soil Research 42, no. 8 (2004): 961. http://dx.doi.org/10.1071/sr04008.

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Urine, faeces, and waste feed flushed from pens of intensive piggeries produce large volumes of nutrient-rich effluent, which is often most productively used for irrigation. These effluents tend to be similar, with pH values in the range 7.6–8.0 together with high water-soluble ammonium and potassium but lower concentrations of calcium, sodium, and magnesium. There is little experimental information on the behaviour of these mixed ion systems in soils, so the effects of artificial but chemically similar effluents were examined in absorption experiments on columns of ‘natural’ soils. In one series of experiments, NH4+ was excluded from the artificial effluent to assess the consequences of its presence or absence. Water content and solute concentration data scaled according to distance divided by the square root of time in experiments terminated at different times. This showed that basic flow and reaction equations were valid and that water-soluble and exchangeable cations appeared to be in equilibrium in the ‘time-scale’ of absorption. Systematic patterns of behaviour emerged: chloride, the dominant anion in the absorbed solution, moved with the water and its front coincided with the piston front that would exist if the absorbed water completely displaced the original soil solution; cation exchange was restricted to the inflow end of the columns in an environment of constant Cl– concentration and was retarded relative to the moving water. High concentrations of NH4+ appeared not materially to affect the exchange isotherms of other cation pairs, although they reduced retardation of other exchangeable cation fronts. The method provides a useful way to define exchange isotherms in an appropriate environment of competing cations.
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Mehta, Nidhi, Kinjal J. Shah, Yu-I. Lin, Yongjun Sun, and Shu-Yuan Pan. "Advances in Circular Bioeconomy Technologies: From Agricultural Wastewater to Value-Added Resources." Environments 8, no. 3 (March 1, 2021): 20. http://dx.doi.org/10.3390/environments8030020.

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This review systematically outlines the recent advances in the application of circular bioeconomy technologies for converting agricultural wastewater to value-added resources. The properties and applications of the value-added products from agricultural wastewater are first summarized. Various types of agricultural wastewater, such as piggery wastewater and digestate from anaerobic digestion, are focused on. Next, different types of circular technologies for recovery of humic substances (e.g., humin, humic acids and fulvic acids) and nutrients (e.g., nitrogen and phosphorus) from agricultural wastewater are reviewed and discussed. Advanced technologies, such as chemical precipitation, membrane separation and electrokinetic separation, are evaluated. The environmental benefits of the circular technologies compared to conventional wastewater treatment processes are also addressed. Lastly, the perspectives and prospects of the circular technologies for agricultural wastewater are provided.
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Ahn, Y. H., I. S. Hwang, and K. S. Min. "ANAMMOX and partial denitritation in anaerobic nitrogen removal from piggery waste." Water Science and Technology 49, no. 5-6 (March 1, 2004): 145–53. http://dx.doi.org/10.2166/wst.2004.0748.

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The anaerobic ammonium removal from a piggery waste with high strength (56 g COD/L and 5 g T-N/L) was investigated using a lab-scale upflow anaerobic sludge bed reactor at a mesophilic condition. Based on the nitrogen and carbon balance in the process, the contribution of autotrophic and heterotrophic organisms was also evaluated in terms of the influent NO2-N/NH4-N ratio (1:0.8 and 1:1.2 for Phase 1 and Phase 2, respectively). The result of this research demonstrates that the anaerobic ammonium removal from the piggery waste, using the UASB reactor, can be performed successfully. Furthermore, it appears that by using granular sludge as the seed biomass, the ANAMMOX reaction can start more quickly. Average nitrogen conversion was 0.59 kg T-N/m3 reactor-day (0.06 kg T-N/kg VSS/day) and 0.66 kg T-N/m3 reactor-day (0.08 kg T-N/kg VSS/day) for Phase 1 and Phase 2. The NO2-N/NH4-N removal ratio by the ANAMMOX was 1.48 and 1.79 for Phase 1 and Phase 2. The higher nitrite contents (about 50%) in the substrate resulted in higher nitrite nitrogen removal by the partial denitritation, as well as the ANAMMOX reaction, implying higher potential of partial denitritation. However, the result reveals that the ANAMMOX reaction was influenced less by the degree of partial denitritation, and the ANAMMOX bacteria did not compete with denitritation bacteria. The colour of the biomass at the bottom of the reactor changed from dark gray to dark red, which was accompanied by an increase in cytochrome content. At the end of the experiment, red-coloured granular sludge with diameter of 1-2 mm at the lower part of the reactor was also observed.
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Lee, S. Y., M. C. Maniquiz, J. Y. Choi, J. H. Kang, and L. H. Kim. "Phosphorus mass balance in a surface flow constructed wetland receiving piggery wastewater effluent." Water Science and Technology 66, no. 4 (August 1, 2012): 712–18. http://dx.doi.org/10.2166/wst.2012.231.

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This research was conducted to investigate the phosphorus forms present in water, soil and sediment and to estimate the phosphorus mass balance in a surface flow constructed wetland (CW). Water quality and sediment samples were collected from each cell along the hydrologic path in the CW from October 2008 to December 2010. At the same time, three dominant plant species (e.g. common reed and cattails) were observed through the measurement of the weight, height and phosphorus content. Based on the results, the orthophosphate constituted 24–34% of total phosphorus in water for each cell. The overall average phosphorus removal efficiency of the CW was approximately 38%. The average inflow and outflow phosphorus loads during the monitoring period were 1,167 kg/yr and 408 kg/yr, respectively. The average phosphorus retention rate was 65%, was mainly contributed by the settling of TP into the bottom sediments (30%). The phosphorus uptake of plants was less than 1%. The estimated phosphorus mass balance was effective in predicting the phosphorus retention and release in the CW treating wastewater. Continuous monitoring is underway to support further assessment of the CW system and design.
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Sezerino, P. H., V. Reginatto, M. A. Santos, K. Kayser, S. Kunst, L. S. Philippi, and H. M. Soares. "Nutrient removal from piggery effluent using vertical flow constructed wetlands in southern Brazil." Water Science and Technology 48, no. 2 (July 1, 2003): 129–35. http://dx.doi.org/10.2166/wst.2003.0103.

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Santa Catarina State, southern Brazil, has the greatest swine breeding activities of Latin America. Generally, the piggery wastewater is treated in pond systems that are able to remove organic material according to local environmental legislation. However, these systems do not remove nitrogen and phosphorus efficiently. This work deals with a post-treatment system, using vertical flow constructed wetlands. The experiment was conducted in a swine production farm which has 45,000 animals. Although the pond system was able to partially remove the content of nutrients, their concentration in the effluent was high for environmental disposal. A four-bed vertical flow constructed wetland pilot plant, using Typha spp., was built. The pilot plant operated for 280 days for beds 2-4 (sand 2). However, the experiments with beds 1-3 (sand 1) were stopped after 111 days of operation, when a reduction in the wastewater drainage was observed. The beds with sand 2 showed a 33% COD removal, and about 49% of nitrification was observed from 111 days until the end of the operation. PO4-P removal was 45% with a loading rate of around 1.36 g m-2 d-1.
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Zhou, Zhong Ren. "Sustainable Development of The “Four-in-One” Model in Rural Areas of Northern China: A Village Case Study." Advanced Materials Research 433-440 (January 2012): 4771–75. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.4771.

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Based on an investigation of a typical village in northern China, we found that the “Four-in-One” ecological model for homes (sunlight greenhouse, pig house, toilet, and biogas digester) achieved benefits with regard to economy, society, energy use, and a cleaner environment once it was established. However, problems still impede the sustainable expansion of the model. The main problems are a relative lag in the management of biogas digesters, challenges in the production and distribution of farm products, home layout and piggery sanitation, competition for labor between agricultural production and outside work, and problems with land resources, investment and credit expenses, and infrastructure. In the end, some countermeasures are proposed, namely, perfecting the technical service system, strengthening farm training and improving agricultural production skills, establishing a stable distribution channel for marketing farm products and a suitable agriculture management model, selecting appropriate households for the Four-in-One model, and so on.
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Andreottola, G., G. Bortone, and A. Tilche. "Experimental validation of a simulation and design model for nitrogen removal in sequencing batch reactors." Water Science and Technology 35, no. 1 (January 1, 1997): 113–20. http://dx.doi.org/10.2166/wst.1997.0026.

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The development and the sensitivity analysis of a dynamic SBR simulation model for biological nitrogen removal, based on the Activated Sludge Model N. 1, are presented. An experimental study for the calibration and validation of the model was carried out using a bench scale SBR. Piggery wastewater was used as feed. The operating daily cycle of the SBR reactor included three sub-cycles of 7.5 hours each, each one alternating anoxic and aerobic condition, while settling phase was carried out at the end of the three sub-cycles. A first enhancement of model N. 1 was performed splitting nitrification into the two sub-processes of nitriation and nitratation. A second enhancement of the model was obtained with the introduction of a switch function of nitratation kinetics. An algorithm for optimization of the cycle length and phase distribution in order to minimize effluent nitrogen concentration was developed. A design procedure of SBR systems is also described.
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Lam, K. C., S. L. Ng, and R. J. Neller. "Fate of Biological and Chemical Contaminants from On-Site Disposal of Liquid Piggery Wastes: Results from a Soil Column Study." Water Science and Technology 27, no. 1 (January 1, 1993): 63–75. http://dx.doi.org/10.2166/wst.1993.0018.

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To assess the feasibility of the soakaway system in treating piggery wastes, eight columns of 3 m length were packed with five commonly occurring soils from Hong Kong and were dosed with pig slurry daily for a period of four months. Infiltration rates of the columns were monitored daily while slurry and soil solution were sampled weekly or fortnightly and analyzed for the major bacterial, organic and inorganic contaminants. Purification efficiency was higher in the volcanic soils than in the coarser granitic soils. Most of the contaminants were removed in the top 1 m unsaturated zone of the columns. Analysis of the effluent collected at the end of the 3 m columns packed with granitic and volcanic alluvial soils indicated purification efficiencies of 100% for E. coli and more than 95% for BOD5, total-P, total-N, PO4, NH4-N and NO3-N. The purification efficiencies of footslope deposits and in-situ weathered materials were significantly lower.
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Dissertations / Theses on the topic "Piggery. eng"

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Miranda, Adélia Pereira. "Suínos em diferentes fases de crescimento alimentados com milho ou sorgo : desempenho, digestibilidade e efeitos na biodigestão anaeróbia /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/104907.

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Resumo: Avaliaram-se dietas formuladas com milho ou sorgo para suínos nas fases inicial, crescimento e terminação sobre o desempenho dos animais, digestibilidade dos nutrientes, produção e características de fezes e urina e biodigestão anaeróbia dos dejetos. No ensaio de desempenho não foram verificadas diferenças quanto ao consumo médio diário de ração, ganho médio diário de peso e conversão alimentar. Foi realizado um ensaio de digestibilidade em cada fase de crescimento dos animais utilizando o método de coleta total de fezes, não se observando diferenças para coeficientes de digestibilidade da matéria seca e da energia bruta, coeficiente de metabolizabilidade, energia digestível e metabolizável. Os maiores coeficientes de digestibilidade da proteína bruta e proteína digestível foram verificados nos animais alimentados com dietas à base de milho na fase terminação. Para animais alimentados com dietas formuladas com sorgo foram verificados maiores valores de matéria seca digestível nas fases crescimento e terminação. Verificou-se maior produção média de fezes para animais alimentados com dietas formuladas com sorgo, gerando maiores coeficientes de resíduo. Os maiores teores de sólidos totais e voláteis foram verificados nas fezes de animais alimentados com dieta à base de milho, em todas as fases de crescimento. As concentrações médias dos nutrientes nas fezes e na urina variaram entre os tratamentos e fases. O abastecimento de 20 biodigestores indicou maiores reduções nos teores de sólidos voláteis e maiores produções de biogás quando se utilizaram fezes de suínos alimentados com dietas formuladas à base de milho. As concentrações médias dos nutrientes no afluente e efluente dos biodigestores variaram entre os tratamentos e fases.
Abstract: There were evaluated diets formulated with corn or sorghum for pigs in the initial stages, growing and finishing on the growth performance of animals, digestibility of nutrients, production and characteristics of feces and urine and anaerobic digestion of pigs manure. In the test of growth performance were not found differences in the average daily consumption of feed, average daily weight gain and feed conversion. There was performed a test of digestibility at each stage of growth of animals using the total collection of feces, no difference was observed for digestibility coefficients of dry matter and gross energy, coefficient to metabolize, digestible and metabolizable energy. The highest rates of digestibility of crude protein and digestible protein were observed in animals fed with diets based on corn in the finishing stage. For animals fed diets formulated with sorghum there were observed higher values of digestible dry matter in growing and finishing phases. There was a greater average production of feces by animals fed with diets based on sorghum, generating higher coefficient of waste. The highest levels of total and volatile solids were found in the feces of animals fed with diets containing corn, in all the stages of growth. The average concentrations of minerals in feces and urine varied among treatments and stages. The supply of 20 anaerobic digesters indicated greater reductions in the volatile solids levels and greater production of biogas when using waste from pigs fed with diets based with corn. The average concentrations of minerals in the affluent and effluent in the anaerobic digesters varied among treatments and stages.
Orientador: Jorge de Lucas Junior
Coorientadora: Maria Cristina Thomaz
Banca: Mônica Sarolli Silva de Mendonça Costa
Banca: Roberto Alves de Oliveira
Banca: Antônio Carlos de Larentiz
Banca: Maria Benincasa Vidotti
Doutor
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Books on the topic "Piggery. eng"

1

Luna, James. The runaway piggy. Houston, Tex: Pinata Books, 2010.

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ill, Lacámara Laura, and Villarroel Carolina, eds. The runaway piggy. Houston, Tex: Pinata Books, 2010.

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Book chapters on the topic "Piggery. eng"

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"(22) NILSSON, C. (1982). Dust investigations in pig houses. Swedish Uni­ versity of Agricultural Sciences, Department of Farm Buildings, Di-vison of Farm Building Constructions, Lund. Rapport 25, pp 93. (23) HILLIGER, H.G. (1966). Gravimetrische Staubmessungen in Stallen. Zbl. Vet. Med. B, 13, 698-708. (24) PALOHEIMO, L.T1969). Weender Analyse. In: W. LEMKEIT, K. BREIREM and E. GRASSMANN (Hrsg.). Handbuch der Tierernahrung, Bd. 1, S.164-171, Verlag Parey, Berlin, Hamburg. (25) HELEN, M. (1984). Einige Ursachen fUr die Variationen der Staubkon-zentration im Mastschweinestal1. In: Symposium der Internationalen Gesellschaft fUr Tierhygiene, Hrsg.: Deutsche Veterinarmedizinische GeselIschaft, 28-30. (26) NAKAUE, H.S., J.K. KOELLIKER, D.R. BUHLER and G.H. ARSCOTT (1981). Distribution of inorganic elements in poultry house dust. Poultry Sci. 60, 1386-1391. (27) CERMAK, J.P. and P.A. ROSS (1978). Airborne dust concentrations as­ sociated with animal housing tasks. Farm Buildg. Progr. 5J_, 11-15. (28) BUNDY, D.S. and E.T. HAZEN (1975). Dust levels in swine confinement systems associated with different feeding methods. Trans. Amer. Soc. Agric. Eng. J8, 137-139. (29) SCHAEFER, J., J.M.H. BEMELMANS and M.C. Ten NOEVER DE BRAUW (1974). Onderzoek naar de voor de stank van varkensmesterijen verantwoordi-lijke componenten. Landbouwkund. Tijdschr., pt 86-9, 228-232. (30) HAMMOND, E.G., C. FEDLER and G. JUNK (1979). Identification of dust-borne odors in swine confinement facilities. Trans. ASAE 22, No. 5, 1186-1189 & 1192. (31) TRAVIS, T.A. and L.F. ELLIOTT (1977). Quantitation of indole and scatole in a housed swine unit. J. Environ. Qual. 6 (34) HARTUNG, J. (1985). Gas chromatographic investigations of swine house dust on odorous compounds. Environmental Technology Letters 6, 21-30. (35) SPOELSTRA, S.F. (1978). Microbial aspects of the formation of malo­ dorous compounds in anaerobically stored piggery wastes. Wageningen, Landbouwhogeschool, Diss., pp. 91. (36) SCHAEFER, J. (1977). Sampling, characterization and analysis of mal-odours. Agric. Environm. 3, 121-127. (37) HARTUNG, J. and E. R0KICK.T (1984). Zum Vorkommen phenol art iger Ver-bindungen im Staub von Schweine- und HUhnerstall. Zbl. Bakt. Hyg., I. Abt. Orig. B, J_79, 431-439. (38) LOGTENBERG, M.Th. and B. STORK (1976). Het ontwikkelen van meetme-thoden voor het bepalen van de stank van ventilatielucht van mest-varkensstallen.Rapport de Centraal Technisch Instituut TNO, Zeist/ Holland. Ref.no: 76-06 054, Dossier: 01-4-40130. (39) WILLSON, G.B. (1971). Control of odours from poultry houses. ASAE Symp. Livestock Waste Management, Columbus/Ohio, 19.-22.4.1971. (40) HAMMOND, E.G., C. FEDLER and R.J. SMITH (1981). Analysis of particle -borne swine house odours. Agric. and Environment 6, 395-399. (41) OWEN, J.E. (1982b). Dust - Filtration solutions an? their cost. Farm Building Progress 68, 19-23." In Odour Prevention and Control of Organic Sludge and Livestock Farming, 340. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-134.

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Conference papers on the topic "Piggery. eng"

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Tilander, N. G., and C. F. Kluth. "Lateral Extensional Faulting in Terciary Piggy-Back Basins and Foredeep Along the Southern Trinidad Fold - Thrust Belt." In 5th Simposio Bolivariano - Exploracion Petrolera en las Cuencas Subandinas. European Association of Geoscientists & Engineers, 1994. http://dx.doi.org/10.3997/2214-4609-pdb.116.033eng.

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Hartloper, Colin, Kamal K. Botros, and Karman Tittemore. "Technical Evaluation of the Consequence of HCDP Upsets From Gas Producers Along Pipeline Laterals." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64076.

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Natural gas accepted into the pipeline at receipt points is subject to gas quality specifications to ensure that downstream laterals and mainlines are not subjected to operational upsets, and that the integrity of the pipeline and related facilities is not compromised. One of the specifications is the maximum hydro-carbon dew point (HCDP) at the pipeline operating pressure. Occasionally, gas plants encounter operational upsets that result in a higher HCDP. If the HCDP exceeds the ground temperature, condensation of heavier hydrocarbon can potentially occur along the lateral. Ideally, after an upset has been detected and the producer has been shut in, the lateral would be pigged to remove the condensed hydrocarbons. However, if the lateral is unpiggable, the only way to remove the liquids is to evaporate them into a flow of dryer gas. The present paper compares two potential courses of action which may be taken after a high HCDP is detected at a receipt point on an unpiggable line: (a) flowing dry gas from the producer after the source of upset is corrected, or (b) pulling dryer gas back from the operator’s mainline through the lateral to the producer. In order to determine the most appropriate course of action for a given upset, the state of the lateral during and after the upset must first be accurately quantified. In the present paper, the state was modelled based on the governing equations of fluid flow including heat transfer and condensation, the GERG-2008 equation of state, and empirical liquid-hold-up equations. The effect of flow parameters (e.g., gas composition, lateral elevation profile, ground temperature, etc.) on the upset severity is explored. Subsequently, models for forward flow and pull back are presented, and the criteria for selecting when either course of action is appropriate are discussed.
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