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Journal articles on the topic 'Evaporation sludge'

Author: Grafiati

Published: 28 September 2024

Last updated: 31 July 2025

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1

Marklund, S. "Dewatering of Sludge by Natural Methods." Water Science and Technology 22, no. 3-4 (1990): 239–46. http://dx.doi.org/10.2166/wst.1990.0207.

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Drying fron a free water surface and from a waste activated sludge was studied In three separate experimental arrangements. Evaporation in a closed chamber with a surface area of 1.0 m2 was studied with temperatures between 20 and 60°C and air flows between 75 and 300 m3/hour. The rate of evaporation varied between 351 and 746 gram/m2 hour. The efficiency varied between 11 and 20%. To increase the efficiency the air-liquid area has to be enlarged. Evaporation from two pilot sludge drying beds was studied in an open air test lasting four months. One similar bed was tested in a controlled enviro

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2

Mouzaoui, M., J. C. Baudez, M. Sauceau, and P. Arlabosse. "How to avoid evaporation during rheological measurements of dewatered pasty sludge at high temperature." Water Science and Technology 79, no. 8 (2019): 1503–10. http://dx.doi.org/10.2166/wst.2019.150.

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Abstract Controlling the residence time in paddle dryers and the drying efficiency imply the knowledge of rheological behaviour of highly concentrated and pasty sludge and its temperature dependency. However, because of perturbing effects such as evaporation, measurements are not fully representative of intrinsic sludge properties. Classical techniques usually considered in the literature for evaporation control are not efficient at high temperatures. This work gives a method to control the evaporation at high temperature that can be used with any commercial rheometer. The configuration concep

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3

Idris, A., O. B. Yen, M. H. A. Hamid, and A. M. Baki. "Drying kinetics and stabilization of sewage sludge in lagoon in hot climate." Water Science and Technology 46, no. 9 (2002): 279–86. http://dx.doi.org/10.2166/wst.2002.0259.

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A sludge lagoon has been adopted as a simple and cost effective method for dewatering of sludge. The processes occurring in a sludge lagoon include thickening, dewatering, storage and stabilization; all happening simultaneously. The objective of this study is to determine the dewatering and drying rates at pilot-scale which occur in a lagoon having different design configurations. Two types of sludge lagoons with different initial sludge depth (0.75 m and 0.375 m) were investigated to measure the drying behavior and drying efficiency. The first design is a sludge lagoon with a clay bottom wher

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Wang, Wan Fu, Guo Li, Xing Yue Yong, Peng Liu, and Xiao Fei Zhang. "The Features of Microwave Thermal Conversion of Oil Sludge." Applied Mechanics and Materials 232 (November 2012): 788–91. http://dx.doi.org/10.4028/www.scientific.net/amm.232.788.

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The microwave thermal conversion process of oil sludge was studied. It was found that the microwave thermal conversion process of oil sludge consisted of 5 stages: rapid heating, microwave drying, microwave hydrocarbons evaporation, microwave pyrolysis and microwave calcining. Using the residue produced from the microwave thermal treatment of oil sludge as a microwave absorbent can significantly accelerate the conversion. However, it does not show significant effect on the features of microwave thermal conversion. Meanwhile, the addition of residue at appropriate percentages increased oil reco

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Li, Xiao Ming, Shang Jie Wang, Jun Xue Zhao, Ya Ru Cui, and Su Bo Hou. "A Review on the Treatments and Minimization Techniques of Stainless Steel Pickling Sludge." Advanced Materials Research 194-196 (February 2011): 2072–76. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2072.

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Pickling sludge is the deposits that generated from the neutralization of pickling waste water with calcium hydroxide in stainless steel pickling process. The main composition of pickling sludge is CaF2, CaSO4, Me(OH)n (M:Fe,Cr,Ni). Solidification /stabilization method is believed to a most economical way to dispose these wastes at present. But the process caused serious compatibilization, it not only took up the scarce land resource, but also wasted nickel, chromium and other resources, in addition, the potential harm of Cr6+ to the environment still existed. A new thought to recycle the slud

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6

Marklund, S. "Dewatering of Drying Beds–Combined Biological-Chemical Sludge Behaviour." Water Science and Technology 28, no. 10 (1993): 65–72. http://dx.doi.org/10.2166/wst.1993.0206.

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Aerobically digested sludge from a small wastewater treatment plant was dewatered on five sand drying pilot beds and four small drainage beds. The experiment was conducted in a controlled environment with constant air humidity and temperature. A total of between 147 and 263 kg of a combined biological-chemical sludge was used on each of the sand drying beds. Initial sludge total solids (TS) content was 4.6 - 5.5%. Sludge drainage was completed within 28 days, and the thinner sludge layers were drained within 16 days. The sludge evaporation phase, prior to equilibrium with air moisture, lasted

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7

Dellbrügge, R., K. Bauerfeld, N. Dichtl, A. Großer, and S. Paris. "‘Technology transfer-oriented research and development in the wastewater sector – validation at industrial-scale plants’ (EXPOVAL) – Subgroup 6: solar sewage sludge drying: first results from investigations with a pilot plant." Water Practice and Technology 10, no. 2 (2015): 371–80. http://dx.doi.org/10.2166/wpt.2015.045.

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Drying sewage sludge is a major aspect of biosolids management. Several investigations were performed in a pilot-scale solar dryer for the subsequent development of design rules for solar dryers. The pilot dryer was operated outside simultaneously with a full-scale dryer and, later, in a building. Total solids in the sludge and climate data were analyzed and logged regularly during drying. The fecal coliform and ammonium content was measured as well. Operation next to the full-scale plant was intended to enable comparison of their evaporation rates. The pilot plant was operated in a building i

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8

Oikonomidis, I., and C. Marinos. "Solar sludge drying in Pafos wastewater treatment plant: operational experiences." Water Practice and Technology 9, no. 1 (2014): 62–70. http://dx.doi.org/10.2166/wpt.2014.007.

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In this study, one year of operating experience with a solar sludge drying plant in Pafos wastewater treatment plant is discussed. The plant had a total area of 3,853 m2 and consisted of four parallel lines. Two types of dewatered sludge with considerably different dry matter content were used. 5,678 tn of dewatered sludge were introduced in the plant and the dried sludge had an average dried solids content of 80.9%, which corresponded to a surface annual evaporation rate of 1.14 tn H2O m−2a−1. The results indicated that solar drying may be a particularly favorable option for sewage sludge dry

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9

Qiao, Huiping, Miaomiao Song, Guizhong Xu, and Chengchun Qiu. "Shrinkage and Cracking Characteristics of Dredged Sludge Containing Straw Fiber Under Different Initial Water Contents." Buildings 15, no. 1 (2024): 97. https://doi.org/10.3390/buildings15010097.

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Dredged sludge usually has high water content and poor engineering properties, which would be unfavorable for its rapid resource utilization. Meanwhile, straw fiber is an environmentally friendly material for improving the mechanical behavior of soil. In this research, a series of shrinkage tests were conducted to investigate the straw fiber effects on the shrinkage behavior of dredged sludge with high water content. Four initial water contents and straw fiber amounts were designed. The water content and crack development were recorded throughout the test. According to the test results, a redu

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Li, Huan, Yang Yang Li, and Yi Ying Jin. "Analyses of Coal and Sewage Sludge Co-Combustion Using Coats-Redfern Model." Advanced Materials Research 518-523 (May 2012): 3271–74. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3271.

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The co-combustibility of coal and sludge was investigated with thermogravimetric analysis. The results show that the burning process of sludge can be divided into three phases: water evaporation, volatile matter volatilization and combustion, fixed carbon combustion and burning out. The ignition temperature of sludge is only 260 degree centigrade at the beginning of volatile matter combustion. The addition of wet sludge or dried sludge will reduce the burning velocity of coal, and also decrease the ignition temperature. However the blend of coal and sludge has not an obvious stage of the volat

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11

Asadov, M. M., E. F. Aliev, E. N. Aliev, and G. S. Aliev. "On the transition of liquid dispersion states and their physical-thermodynamic nature in the development of gas-condensate reservoirs in depletion mode." Azerbaijan Oil Industry, no. 09 (September 15, 2024): 55–61. http://dx.doi.org/10.37474/0365-8554/2024-09-55-61.

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This work presents new results of physical and chemical analysis of samples from contaminated areas of the Absheron field. The advantages and disadvantages of the used and traditional methods of cleaning oil waste are shown. Modern methods have been used to determine the characteristics of oil sludge samples from the Balakhany, Ramana, Surakhany, Bibiheybet fields of the Absheron Peninsula: oil sludge composition, viscosity, density, water content, chemical composition, temperature, cutting size, toxicity, volume, pH level, turbidity, BOD (biological oxygen demand), TDS (total dissolved solids

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12

Vo, Khoi Diep Ngoc. "STUDY ON SLUDGE TREATMENT BY THE AEROBIC STABILIZATION PROCESS COMBINES WITH BULKING AGENT AND HEATED AIR SUPPLY." Vietnam Journal of Science and Technology 58, no. 5A (2020): 190. http://dx.doi.org/10.15625/2525-2518/58/5a/15314.

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The paper presents the results of the evaluation of sludge decomposition ability from a municipal wastewater treatment plant by an aerobic process on the Mishimax device (MK-50). The principle of the process was based on the microorganisms activated by the bulking agent as a bio-carrier to decompose organics composition and increase the evaporation by heating. An average sludge amount of 30 kg/day was added into MK-50, with the moisture of 80.2 – 83.6 %, with the C/N ratio of around 22 - 35. The heated air with 50 oC in temperature was supplied into a rotary bioreactor during the experiment pe

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13

Qi, Hongyuan, Huayi Jiang, Yanzhen You, et al. "Mechanism of Magnetic Nanoparticle Enhanced Microwave Pyrolysis for Oily Sludge." Energies 15, no. 4 (2022): 1254. http://dx.doi.org/10.3390/en15041254.

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In view of the high dielectric constant of magnetic nanoparticles, this paper intends to use it as a new type of microwave absorbing medium to accelerate the microwave pyrolysis process of oily sludge. Microwave thermogravimetric reaction and pyrolysis product staged collection devices were established, respectively. The main stage of pyrolysis process of oily sludge was divided based on the thermogravimetric experiments. Mechanism was studied through the characteristics of pyrolysis products and reaction kinetics simulation. Experimental results showed that the addition of magnetic ZnFe2O4 pa

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14

Zhai, Tian Yang, and Lin Fang. "Comparative Study on the Drying Process and Fractal Dimension of Sewage Sledge: Microwave and Air-Blast." Applied Mechanics and Materials 423-426 (September 2013): 1409–12. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1409.

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A fractal model simulate the internal structure of the sludge, and on the model deduce that fractal dimension is D and the corresponding pore is r, the porosity is P. Determine the rate in the air-blast and microwave drying and calculate its different fractal dimension under different ages. The results showed that: the fractal dimension and its rate of water loss has a good correlation. Fractal dimension can describe a certain amount of sludge pore channels and internal cell rupture can cause that which would accelerate the evaporation of bound water. Microwave and the excessive energy of air-

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15

Chen, Changzhong, and Qiang Jia. "Study on engineering process and equipment operation of total treatment project of leachate and concentrated solution." Journal of Physics: Conference Series 2206, no. 1 (2022): 012023. http://dx.doi.org/10.1088/1742-6596/2206/1/012023.

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Abstract The accumulation of a large amount of leachate and concentrated liquid caused by MSW is a serious potential safety hazard and environmental hazard. A full treatment project of leachate and concentrate were performed, with treatment capacity of leachate 1100 t/d and concentrate 550 t/d. The leachate treatment process adopts “pretreatment + second-stage A/O biochemistry + ultrafiltration + chemical softening + second-stage DTRO+HPRO+RO+ ion exchange”. The main processing equipment is jet aerator, submersible mixer, centrifugal pump, ultrafiltration membrane assembly, softening membrane

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Martínez-Gallardo, M. R., M. M. Jurado, J. A. López-González, et al. "Biorecovery of olive mill wastewater sludge from evaporation ponds." Journal of Environmental Management 319 (October 2022): 115647. http://dx.doi.org/10.1016/j.jenvman.2022.115647.

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Obianyo, JI, and JC Agunwamba. "Modeling of Evaporation Losses in Sewage Sludge Drying Bed." Nigerian Journal of Technology 34, no. 4 (2015): 890. http://dx.doi.org/10.4314/njt.v34i4.31.

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18

M, Takahashi. "The Chemical Change of the Ash Components through Phosphorus Recovery of Dehydrated Sludge by Incineration using Alkali Metal Compounds." Open Access Journal of Waste Management & Xenobiotics 4, no. 4 (2020): 1–6. http://dx.doi.org/10.23880/oajwx-16000168.

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In order to recover phosphorus from the wastewater sludge, the dehydrated sludge was mixed with the reagent of NaOH, KOH or Na 2 CO 3 , and incinerated at 750 °C or 900 °C. Phosphorus in the incinerated ash of the sludge was dissolved by the addition of the hot water, and recovered by the evaporation of the extract. The recovered phosphorus was confirmed to be an alkali metal phosphate, and the recovery rate reached about 75% regardless in these reagents (NaOH, KOH or Na 2 CO 3 ). The chemical change of the ash components were also found through phosphorus recovery.

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19

Shauchuk, V. V., Z. A. Hotto, A. S. Stromsky, and A. A. Stromsky. "One-step method for obtaining potassium sulfate and processing of lye." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 57, no. 2 (2021): 226–35. http://dx.doi.org/10.29235/1561-8331-2021-57-2-226-235.

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Method of obtaining potassium sulfate with basic substance content higher 92 % shown. Process conditions: 110 % KCl (10 % excess substance from stoichiometry), mixing at temperature higher 95 °C during 30 min, mixing at temperature 0 °C for 1 hour, stirrer speed 500 rpm, sludge washing 15 % water from wet sludge weight, drying the washed sludge at 70–80 °C during 1 hour. The degree of evaporation of the solution at which the double salt of potassium and ammonium sulfate precipitated was determined. The degree is 30 % at the evaporated suspension cooled, and is 45 % at hot filtration.

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20

Zhang, Wei, Xiaowei Wang, Qianshi Song, et al. "Insight into the Effects of Inorganic Element Catalysis and Basic Fuel Properties on the Self-Sustained Smoldering Process of Sewage Sludge." Catalysts 12, no. 10 (2022): 1173. http://dx.doi.org/10.3390/catal12101173.

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The objective of this study is to investigate the effects of inorganic element catalysis and basic fuel properties of sewage sludge on pyrolysis kinetics and self-sustained smoldering characteristics. The sludge pyrolysis process was explored by thermogravimetric and iso-conversion methods, and it was found that the pyrolysis process can be divided into two stages, which are mainly determined by the organic and inorganic components of the fuel. The inorganic components (e.g., Na, Fe and Mn) have a significant catalytic effect on the release of volatiles and the decomposition of macromolecules.

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21

Grüter, H., M. Matter, K. H. Oehlmann, and M. D. Hicks. "Drying of Sewage Sludge – An Important Step in Waste Disposal." Water Science and Technology 22, no. 12 (1990): 57–63. http://dx.doi.org/10.2166/wst.1990.0100.

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Industrial drying techniques are successfully used processes. They are usually used for the production of base materials for industries such as food, chemical and pharmaceutical. These processes can be transferred without any difficulty for the drying of sewage sludge. Thermal drying as a process for the purpose of water removal is an important link in waste management between sludge production and sludge disposal. Two systems, convection and contact drying, are here compared. Contact drying in the thin film evaporation process is explained. Explanation and proposed uses of the single and two-

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22

Surikova, Alisa, Elena Sytsyanko, Ekaterina Solov’eva, and Liliya Mukhametova. "Increasing the productivity of a plant for moisture evaporation from oil sludge by application of efficient method for technological parameters calculation." E3S Web of Conferences 178 (2020): 01071. http://dx.doi.org/10.1051/e3sconf/202017801071.

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The paper presents the method of heat calculation of recovery stages for the plant of moisture evaporation from oil sludge. It enables to increase the plant power and reduce fuel consumption per one unit of evaporated moisture in heating boiler.

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23

Wang, Kai Feng, Na Peng, and De Liang Liu. "Physicochemical Properties of Artificial Soil Composed of Sewage Sludge, Fly Ash, and Slag." Applied Mechanics and Materials 178-181 (May 2012): 880–84. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.880.

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The pH, electric conductivity (EC), nutrients, heavy metals, water-holding capacity and water permeability of stabilized sewage sludge were investigated by mixing municipal sewage sludge with alkaline fly ash and slag. The results indicate that the evaporation of soil moisture increases and water-holding capacity decreases in these artificial soils with an increase of slag, and the infiltration rate of artificial soils increases to improve its water permeability by adding slag to sewage sludge. The pHs of stabilized artificial soils range from 7.5 to 8.0 for a weak alkaline soil, which tend to

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Li, Kai, Ao Cai, Yijun Tang, and Xianyong Zhang. "Heat and Mass Transfer Characteristics of Oily Sludge Thermal Desorption." Processes 12, no. 1 (2024): 227. http://dx.doi.org/10.3390/pr12010227.

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Oily sludge is a loose material containing solid and multiple liquid components. Thermal desorption is an efficient method of disposing of liquids from oily sludge. Most existing studies have mainly discussed the effect of some external process parameters on thermal desorption, with little discussion on the heat transfer characteristics and the variation in the wet component mass of oily sludge under heating. Small-scale experiments have been performed to measure the rise in temperature and liquid phase content change of the sludge during heating. The temperature rise rate increases with mater

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Pervov, Alexei, Htet Zaw Aung, and Dmitry Spitsov. "Treatment of Mine Water with Reverse Osmosis and Concentrate Processing to Recover Copper and Deposit Calcium Carbonate." Membranes 13, no. 2 (2023): 153. http://dx.doi.org/10.3390/membranes13020153.

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Mine water usually contains heavy metals and other inorganic and organic pollutants that contaminate water bodies. Reverse osmosis (RO) techniques are capable of producing purified water that meets discharge regulations. However, the problem of RO concentrate disposal and utilization is still not solved. The well-known zero liquid discharge (ZLD) process provides total concentrate utilization at the power industries but seems unreasonably expensive for the treatment of large amounts of mine water due to required chemical softening and the evaporation of concentrate. In the present article, a n

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Moiambo, Osvaldo, Raúl Mutevuie, Filipa Ferreira, and José Matos. "Modelling Faecal Sludge Dewatering Processes in Drying Beds Based on the Results from Tete, Mozambique." Sustainability 13, no. 16 (2021): 8981. http://dx.doi.org/10.3390/su13168981.

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Currently, in sub-Saharan African countries, 65 to 100% of the urban population is served by on-site sanitation systems, typically pit latrines and septic tanks. Faecal sludge dewatering in drying beds is one of the most commonly adopted low-cost treatment technologies in developing countries due to favourable climate conditions in terms of temperature and radiation and because their operation and maintenance are simple. Nevertheless, research in tropical dry zones regarding these processes is scarce. In this paper, a mathematical model for faecal sludge dewatering in sludge drying beds (SDBs)

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Park, Ki-Tae, Byung-Ran Lim, and Soo-Koo Lee. "Drying characteristics of sewage sludge using vacuum evaporation and frying." Journal of Material Cycles and Waste Management 12, no. 3 (2010): 235–39. http://dx.doi.org/10.1007/s10163-010-0293-x.

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Ishii, H., K. Tanaka, M. Aoki, T. Murakami, and M. Yamada. "Sewage Sludge Composting Process by Static Pile Method." Water Science and Technology 23, no. 10-12 (1991): 1979–89. http://dx.doi.org/10.2166/wst.1991.0654.

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This paper reports the results of experiments on the static pile composting process undertaken in different conditions. The experiments have revealed the following:–In order to compost dewatered sludge with polymer without any bulking agents, we used recycled compost to adjust the moisture content of dewatered sludge.When the moisture content of feed mixture, which was dewatered sludges and recycled composts, was lowered to approximately 50%, the raw sludge could be composted by either natural ventilation or intermittent aeration.–When the BOD of feed mixture was lower than 50 g/kg-DS, the fer

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Liu, Yucheng, Maoren Wang, Mingyan Chen, Meng Zhu, and Maoqi Liao. "Facilitating the natural semi-drying of oily sludge by changing the form of water." PLOS ONE 16, no. 1 (2021): e0245430. http://dx.doi.org/10.1371/journal.pone.0245430.

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Reducing the water content of oily sludge is essential for the disposal of it. Despite conditioning and solid-liquid separation, the water content of oily sludge generally exceeds 65%. A large amount of this water exists in the form of emulsified and bound water, reducing the efficiency of water removal during the natural semi-drying process of oily sludge. To shorten the time required for natural semi-drying, this study applied an orthogonal test to screen an oily sludge modified material (OSM). The effect and mechanism of OSM on the natural semi-drying of oily sludge were studied using a the

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Ingallinella, A. M., G. Sanguinetti, R. G. Fernández, M. Strauss, and A. Montangero. "Cotreatment of sewage and septage in waste stabilization ponds." Water Science and Technology 45, no. 1 (2002): 9–15. http://dx.doi.org/10.2166/wst.2002.0002.

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A one year study was carried out in a waste stabilization ponds system where septage and sewage are cotreated. The system consists of two septage ponds which operate alternately followed by two ponds in series which receive the combined effluent. The septage ponds also act as evaporation ponds for the accumulated sludge. The monitoring program was divided in two phases. The results of the first phase indicate that the effluent of septage ponds has an adequate quality to be discharged into the waste stabilization ponds designed to treat sewage and that is possible to use the septage ponds to dr

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Becker, W., M. A. Schoen, and B. Wett. "Solar-thermic sewage sludge treatment in extreme alpine environments." Water Science and Technology 56, no. 11 (2007): 1–9. http://dx.doi.org/10.2166/wst.2007.726.

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In the framework of a program for environmental protection conducted by the German mountaineers' club (DAV) problems emerging from residual solids accumulating in on-site wastewater treatment plants of mountain refuges were investigated. To handle these problems in an ecologically and economically reasonable way two devices for solar-supported treatment of sludge and bio-solids have been developed. These units support gravity-filtration and evaporation of liquid sludge as well as thermal acceleration of composting processes. Two solar sludge dryers were installed and operated without external

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Radovenchyk, Yaroslav, Tamara Krysenko, and Maksym Poberezhnyi. "Evaporation of liquids at low temperatures." Proceedings of the NTUU “Igor Sikorsky KPI”. Series: Chemical engineering, ecology and resource saving, no. 4 (December 24, 2021): 74–81. http://dx.doi.org/10.20535/2617-9741.4.2021.248947.

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Ukrainian enterprises annually generate millions cubic meters of mineralized water, which is discharged into surface reservoirs, and millions cubic meters of highly concentrated solutions and suspensions, which are accumulated and stored in special sludge storages. This waste water causes irreparable damage to the environment. A new method for the evaporation of industrial concentrates by fibrous materials with capillary properties was proposed not so long ago. The use of such materials allows an effective, autonomous, cheap, and extremely simple system to be created for the evaporation for va

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Fantasse, Azeddine, Lakhal El Khadir, Bougayr El Houssayne, and Ali Idlimam. "Solar Greenhouse Drying Kinetics Efficiency of Hydroxide Sludge in Marrakesh, Morocco." Advanced Engineering Forum 51 (January 12, 2024): 27–36. http://dx.doi.org/10.4028/p-bmu3yr.

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This paper presents a case study of solar drying of hydroxide sludge in the region of Marrakesh, Morocco. The experiments of solar greenhouse drying processes of the hydroxide sludge were studied in summer and winter seasons. The representative samples were in three volumes. The greenhouse sludge dryer was designed and constructed as a horticultural plant. Results showed that the dry of the three samples was reached in only 13 hours in summer and 25 hours in winter. The time of solar greenhouse drying registered was significantly lower compared to several studies. The higher values of drying r

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Đuriš, Mihal, Zorana Arsenijević, Dragan Povrenović, and Tatjana Kaluđerović-Radoičić. "Drying of Waste Water Treatment Sludge in Fluidized Bed of Inert Particles." Procesna tehnika 31, no. 2 (2019): 14. http://dx.doi.org/10.24094/ptc.019.31.2.14.

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The benefits of drying waste water treatment sludge can be seen in two main aspects: the dried sludge can be stored and further as an organic fertilizer, or it can be a source of useful (active) microorganisms that can be reused in waste water treatment. Drying of suspensions and pastes in fluidized beds of inert material is a very attractive alternative to conventional drying technologies for suspensions, due to considerably greater specific capacity expressed as capacity per unit volume, less energy consumption and less drying air consumption. High drying efficiency results from large contac

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Ghrairi, Armia, Lassaad Ajam, and Oualid Limam. "Mixture Design Identification of Admissible Tannery Sludge Incorporation in Fired Bricks." International Journal of Engineering Research in Africa 68 (April 10, 2024): 11–30. http://dx.doi.org/10.4028/p-escdu9.

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Pollution problems caused by industrial production of leather tanneries are an important environmental issue. In the present paper we propose to study effects of tannery sludge (TS) addition in manufactured clay bricks applying a mixture design formed by different proportions of four components: Clay, two types of sand and TS. The analysis leads to an optimal practical mixture of around 10% of TS, 20% of sand and 70% of clay and this to remain with an acceptable aspect, an admissible water absorption below 15%, an admissible total shrinkage (drying and after fire) lower than 8%, a tensile stre

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Wallin, M., A. Voll Bugten, G. Tranell, and K. E. Ekstroem. "Valorization of SiMn Sludge for Production of Low-Phosphorus Ferroalloys." Journal of Sustainable Metallurgy 7, no. 3 (2021): 978–84. http://dx.doi.org/10.1007/s40831-021-00385-9.

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AbstractThe sludge generated by wet scrubbing the off-gas from a silicomanganese plant in Norway represents a significant loss in silicon and manganese values. This work seeks to extract these values in the production of ferroalloys and slags that can be utilized by alternative industries. Carbothermic smelting the sludge together with iron or iron scraps at 1600 °C produced FeSiMn alloys consisting of 57–64 wt.% Mn, 16–22 wt.% Si and 18–25 wt.% Fe. The low level of phosphorus in the sludge allowed for beneficial phosphorus concentrations as low as 500 ppmw in the metal alloys. The addition of

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Al‐Wabel, M. I., A. A. Shalaby, and A. M. Al‐Omran. "Intermittent evaporation from calcareous sandy soils as affected by sewage sludge." Arid Soil Research and Rehabilitation 11, no. 1 (1997): 85–93. http://dx.doi.org/10.1080/15324989709381461.

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Kim, Seok-Hwan, Byung-Ran Lim, and Soo-Koo Lee. "Drying characteristics of thickened sewage sludge in oil vacuum evaporation system." Journal of Material Cycles and Waste Management 20, no. 2 (2017): 1085–89. http://dx.doi.org/10.1007/s10163-017-0671-8.

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Эльмурзаев, А. А., Ю. Х. Тарамов, and П. С. Цамаева. "FACILITATING THE NATURAL SEMI-DRYING OF OILY SIUDGE BY CHANGING THE FORM OF WATER." Вестник ГГНТУ. Технические науки, no. 2(28) (August 26, 2022): 72–80. http://dx.doi.org/10.34708/gstou.2022.11.29.006.

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Уменьшение содержания воды в нефтесодержащем шламе имеет важное значение для его утилизации. Несмотря на кондиционирование и разделение твердой и жидкой фаз, содержание воды в нефтесодержащем шламе обычно превышает 65%. Большое количество этой воды существует в виде эмульгированной и связанной воды, что снижает эффективность удаления воды в процессе естественной полусушки нефтешлама. Чтобы сократить время, необходимое для естественной полусушки, в этом исследовании применялся метод содействия естественному полувысыханию нефтесодержащего шлама за счет изменения формы воды с применением модифици

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Синицын, Н. Н., Н. В. Запатрина, И. А. Сарычева, Ю. В. Грибкова, Е. В. Голицына, and Ю. В. Донцова. "MATHEMATICAL SIMULATION OF HIGH-TEMPERATURE DRYING OF A DROP OF SCALE- AND OIL-CONTAINING SLUDGE WHEN MOVING IN A SWIRLING GAS FLOW." Proceedings in Cybernetics 22, no. 3 (2023): 66–75. http://dx.doi.org/10.35266/1999-7604-2023-3-66-75.

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The article presents an examination of the movement trajectory of a single liquid drop of sludge containing water, oil, and iron scale in a swirling high-temperature gas flow. Taking into account a two-phase transition area from liquid water to vapor, temperature fields in a drop are determined, as is an algorithm for calculating the movement trajectory of a drop in a swirling gas flow when heating it up according to a two-phase area of water evaporation. When designing a drying chamber for drops of scale- and oil-containing sludge, a mathematical model helps predict its typical size as well a

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Kujawiak, Sebastian, Małgorzata Makowska, Bogusława Waliszewska, et al. "The Influence of Drying Sewage Sludge with the Addition of Walnut Shells on Changes in the Parameters and Chemical Composition of the Mixture." Energies 17, no. 18 (2024): 4701. http://dx.doi.org/10.3390/en17184701.

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One method of preparing sludge for management and use is solar drying. To intensify the drying process, natural lignocellulosic additives can be used to alter the structure of the sludge and accelerate water evaporation. Light, hard materials with low absorption capacity are best suited for this purpose, e.g., walnut shells, which are unused waste. The aim of the study was to determine the impact of the evaluation of walnut shells on the sludge drying process and to assess the impact of the drying process on the chemical, physical, and fuel properties of the additive. The moisture content, cru

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Berroug, Fatiha, Yassir Bellaziz, El Khadir Lakhal, et al. "A numerical investigation on the conductive drying process for phosphate sludge." South Florida Journal of Development 5, no. 10 (2024): e4533. http://dx.doi.org/10.46932/sfjdv5n10-039.

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Phosphate production generates huge quantities of waste materials that pose both economic and environmental challenges. They are characterized by a high-water content, making disposal a very difficult task. To address this issue, conductive drying emerges as a viable solution to reduce the water content in the phosphate sludge to facilitate handling and specially recycling them as construction materials. This paper presents a simplified numerical model based on Fick's law, depicting heat and mass transfer in porous media to simulate the conductive drying process within the phosphate sludge. To

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Zhou, Jun, Fenwu Liu, and Chengyi Pan. "Effects of Cationic Polyacrylamide Characteristics on Sewage Sludge Dewatering and Moisture Evaporation." PLoS ONE 9, no. 5 (2014): e98159. http://dx.doi.org/10.1371/journal.pone.0098159.

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Velychko, Svitlana, and Olena Dupliak. "Assessment of the Influence of Evaporation and Evapotranspiration on the Volume of Sludge Accumulation in The Sludge Drying Beds." Journal of Ecological Engineering 22, no. 2 (2021): 63–69. http://dx.doi.org/10.12911/22998993/130896.

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Ek, M., R. Bergström, J. E. Bjurhem, B. Björlenius, and D. Hellström. "Concentration of nutrients from urine and reject water from anaerobically digested sludge." Water Science and Technology 54, no. 11-12 (2006): 437–44. http://dx.doi.org/10.2166/wst.2006.924.

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Experiments with concentration of nutrients from source separated urine and reject water from digestion of sludge in sewage treatment plants (STP) have been performed in laboratory and pilot scale. The methods tested were membrane filtration with reverse osmosis (RO), evaporation, and precipitation of phosphorus and distillation of ammonia. In membrane filtration, pre-filtration with particle separation at 5–10 μm was enough to avoid clogging of the membranes. Separation of phosphorus (P), potassium (K) and sulphur (S) was almost 100%, while separation of nitrogen (N) was dependent on pH. The

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Lin, Ta-Hui, Annas Fauzy, Guan-bang Chen, and Fang-Hsien Wu. "Utilization of Sewage Sludge Using Multiple Thermal Conversion Processes." Teknomekanik 4, no. 2 (2021): 97–110. http://dx.doi.org/10.24036/teknomekanik.v4i2.11572.

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Sewage sludge is a usual waste from urban areas that can be utilized in many renewable energy sources. In this study, we examine the sewage sludge utilization using pyrolysis process to produce pyrolytic oil using Taguchi methods, combustion characteristic of sludge pyrolytic oil (SPO) blend with heavy fuel oil (HFO), and co-gasification of sewage sludge with CO2/steam as the gasification medium using Taguchi methods. The best-operating conditions for the pyrolysis of sewage sludge are a heating rate of 10oC/min, temperature of 450oC, the residence time of 60 min, and N2 flow rate of 700 mL/mi

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Mato, Fidel A., Mar Peña, Yoana García-Rodríguez, María-Dolores Bermejo, and Ángel Martín. "Analysis of the Energy Flow in a Municipal Wastewater Treatment Plant Based on a Supercritical Water Oxidation Reactor Coupled to a Gas Turbine." Processes 9, no. 7 (2021): 1237. http://dx.doi.org/10.3390/pr9071237.

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Biological municipal wastewater treatments lead to high sludge generation and long retention times, and the possibilities for recovery of the energy content of the input waste stream are very limited due to the low operating temperature. As an alternative, we propose a sequence of exclusively physicochemical, non-biological stages that avoid sludge production, while producing high-grade energy outflows favoring recovery, all in shorter times. Ultrafiltration and evaporation units provide a front-end concentration block, while a supercritical water oxidation reactor serves as the main treatment

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Kujawiak, Sebastian, Małgorzata Makowska, Damian Janczak, et al. "An Analysis of the Physicochemical and Energy Parameters of Briquettes Manufactured from Sewage Sludge Mixtures and Selected Organic Additives." Energies 17, no. 18 (2024): 4573. http://dx.doi.org/10.3390/en17184573.

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As a by-product of wastewater treatment, sewage sludge can be used for natural, agricultural, or energy purposes. One method of preparing sludge for management and use is solar drying. To intensify the drying process, natural additives can be used to alter the structure of the sludge and accelerate the evaporation of water. This research aimed to evaluate the influences of different organic additives in sewage sludge mixtures on the physicochemical and energy parameters of briquettes. This research was carried out without thermal boosting in a 4 × 2.5 × 2 m plastic tunnel. The tunnel was equip

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Remington, Claire, Catherine Bourgault, and Caetano C. Dorea. "Measurement and Modelling of Moisture Sorption Isotherm and Heat of Sorption of Fresh Feces." Water 12, no. 2 (2020): 323. http://dx.doi.org/10.3390/w12020323.

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The drying (or dewatering) of fresh feces and fecal sludge is a productive step in the management of sanitation, waste treatment, and resource recovery services. An improved understanding of fresh feces and fecal sludge drying would contribute to the development and deployment of fecal sludge management services. However, there is a lack of available literature on the fundamental drying characteristics of fresh feces. In response to this gap, this work shares experimental results for equilibrium moisture content of fresh feces at different water activity levels (aw) and proposes the use of the

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Parra-Angarita, Sergio Luis, Mohamad Wael Al Sayed, and Angélique Léonard. "The Variability of Textural Properties and Drying Characteristics of Dehydrated Sewage Sludge." Clean Technologies 7, no. 2 (2025): 31. https://doi.org/10.3390/cleantechnol7020031.

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This study investigates the drying behavior and rheological properties of dehydrated sewage sludge from various wastewater treatment plants in the Liege region (Belgium). Emphasizing the characterization of key parameters to enhance sludge management strategies, a series of experiments were conducted, including total solid content (TSC) determination, volatile solid content (VSC) analysis, texture profile analysis (TPA), penetrometry, and oscillatory rheology tests. Results showed no significant trends between specific evaporation capacity and the analyzed variables, cohesiveness, TSC, VSC, ha

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