Results 131 to 140 of about 412 (178)
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Influence of microwave irradiation on sludge dewaterability
Chemical Engineering Journal, 2009Abstract The study focuses on the effect of microwave irradiation on sludge dewaterability. Capillary suction time and specific resistance of filtration were used to evaluate sludge dewaterability. Soluble chemical oxygen demand, extracellular polymeric substance (EPS) content and sludge particle size were determined in an attempt to explain the ...
Hengyi Lei, Guangwei Yu
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The Impact of Digestion on Sludge Dewaterability
Process Safety and Environmental Protection, 2000Sludge disposal is a growing problem for all wastewater treatment companies, as intensifying wastewater processing to meet more stringent discharge limits leads to increased sludge production. Anaerobic digestion can reduce the overall mass of the waste sludge requiring disposal, but the end product is generally more difficult to dewater.
J.I. Houghton, J. Quarmby, T. Stephenson
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Dewaterability of Aerobic Granular Sludge
Applied Mechanics and Materials, 2011Dewatering characteristics of aerobic granular sludge, activated sludge and sludge which mixed flocculant was studied. It was shown that the specific resistance of aerobic granular sludge is lower than activated sludge and sludge with mixed flocculant was in the range of 1.07~1.80×109 S2/g, and it increased with the increase of diameters of the ...
Yan Nian Zhou, Jun Li, Jing Li, Su Wei
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Stratification Structure of Sludge Flocs with Implications to Dewaterability
Environmental Science & Technology, 2008Sludge dewatering has proven to be an effective method to reduce the volume of sludge. In this study, a novel stratification approach aimed at better understanding the factors influencing the sludge dewaterability (as determined by capillary suction time, CST) was developed.
Guang-Hui, Yu +3 more
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Enhancement of municipal sludge dewaterability by electrochemical pretreatment
Journal of Environmental Sciences, 2019Electrolysis is a promising technology to improve sludge dewaterability efficiently with negligible environmental impact. To intensify the electrolytic efficiency, the effect of electrolytes (NaCl, Na2SO4, NaNO3, and NaClO4) on electrolysis pretreatment of municipal sludge and its mechanisms was investigated using Ti/PbO2 electrodes.
Ke, Xiao +7 more
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Influence of microwave and ultrasound on sludge dewaterability
Advances in Intelligent Systems Research, 2014Sludge with large production is difficult to be dewatered without any pretreatment. Pretreatment with ultrasound and microwave can adjust the structure of sludge and change the water form, therefore increase the water content which could be dispelled easily.
Xinyue Li, Cuihong Zhou, Ying Ling
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Network strength and dewaterability of flocculated activated sludge
Water Research, 2002Works in literature proposed the use of the rheological properties of wastewater sludges as an index for conditioner assessment and control. We demonstrated in this work, on the contrary, that one could not justify the consistency of the commonly used rheological characteristics of the sewage sludge samples taken from the same site but at different ...
Yen, Pei-Shan +4 more
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Reversibility of the structure and dewaterability of anaerobic digested sludge
Journal of Environmental Sciences, 2016The reversibility of the structure and dewaterability of broken anaerobic digested sludge (ADS) is important to ensure the efficiency of sludge treatment or management processes. This study investigated the effect of continuous strong shear (CSS) and multipulse shear (MPS) on the zeta potential, size (median size, d50), mass fractal dimension (D(F ...
Yiqi, Sheng +5 more
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Effect of temperature on the dewaterability of hematite suspensions
International Journal of Mineral Processing, 2004Abstract Many industrial processes perform solid–liquid separation operations at elevated temperatures. One such example is the Bayer process, which is used to produce alumina from bauxite. During the thickening and washing of the process residue (red mud), the operational temperature decreases from around 110 to 35 °C, and thus an understanding of ...
J Hulston, R.G de Kretser, P.J Scales
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Enhanced sludge dewaterability using a bifunctional hybrid coagulant
Chemosphere, 2023The combination of coagulation and addition of skeleton builder is a popular pretreatment method to improve the dewaterability of sludge. In this study, a novel bifunctional inorganic/organic hybrid coagulant (CS-Si@ATP) was designed and obtained by chemically coupling a cationic starch (CS) with a popular clay, that is, attapulgite (ATP), via a silane
Shaohang, Shen +7 more
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