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Benthal stabilization of waste activated sludge
Water Research, 1982Abstract Laboratory studies were performed on the stabilization of waste activated sludge solids in a deposit formed at the bottom of an aerated water column. Conclusions reached were as follows: (1) As long as dissolved oxygen is maintained in the water column, the benthal process is stable and odor free. (2) At temperatures within the range of 20 ±
L.G Rich, B.W Connor
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Ultrasonic treatment of waste activated sludge
Environmental Progress, 2006AbstractActivated sludge processes are key technologies to treat wastewater. These biological processes produce huge amounts of waste activated sludge (WAS), now commonly called biosolids. Mechanical, thermal, and/or chemical WAS conditioning techniques have been proposed to reduce the sludge burden.
Dewil, Raf +2 more
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Anaerobic Digestion of Waste Activated Sludge
Journal of the Environmental Engineering Division, 1982The purpose of this laboratory study was to evaluate, and model the effect of solids retention time in the activated sludge process (θ\N\dc\uA\uS) on the performance of anaerobic digesters fed the resulting waste sludges. Activated sludge systems were operated over a range of θ\N\dc\uA\uS values, with the waste sludges used as feed sources for batch ...
James M. Gossett, Roy L. Belser
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Functionality of surfactants in waste-activated sludge treatment: A review
Science of The Total Environment, 2017Proper treatment of waste-activated sludge (WAS) involves three pivotal processes, dewatering, anaerobic digestion, and pollutants removal, which need to be re-assessed urgently. Although many traditional sludge treatments have been developed, it is prudent to enhance the efficiency of sludge treatment using multifunctional, flexible, and ...
Renpeng, Guan +6 more
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Rheological characterization of thermal hydrolysed waste activated sludge
Water Research, 2019Rheological properties are important in the design and operation of sludge-handling process. Despite this, the rheology of sludge in thermal hydrolysis processes (TH) is not well described. In-situ measurements were performed to characterize the flow behaviour of various concentrations (7-13 wt%) of waste activated sludge (WAS) at TH conditions ...
Kevin Hii +4 more
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Effects and model of alkaline waste activated sludge treatment
Bioresource Technology, 2008Due to lack of information about alkaline sludge treatment with high dose at ambient temperature, alkaline sludge treatment was investigated to know the effects of different doses (0-0.5 mol/L) of sodium hydroxide (NaOH) and calcium hydroxide [Ca(OH)2] at 0-40 degrees C. Results showed that NaOH was more suitable than Ca(OH)2 for sludge disintegration.
Huan, Li +4 more
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Bulking of dairy waste activated sludge
Water Research, 1968Abstract The phenomenon of bulking of a dairy waste activated sludge was studied in relation to known and estimated data concerning two types of microorganisms involved in the mechanism of bulking, viz. Sphaerotilus and Arthrobacter -like bacteria.
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Modelling codigestion of food waste and waste activated sludge
2018Albeit Waste Activated Sludge (WAS) and Food Waste (FW) are both suitable for anaerobic digestion, their utilization in a Continuous Stirred Reactor (CSTR) presents several drawbacks; the former substrate presents a low energetic content and poor rheological properties, whereas the latter has a very high content of readily biodegradable carbohydrates ...
D Montecchio +4 more
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EFFECTS OF ULTRASONIC TREATMENT ON THE WASTE ACTIVATED SLUDGE
2010Aktif çamur içerisindeki birçok organik bileşik partiküler formda bulunmakta olup, yavaş bir süreç olan hidroliz işlemiyle ayrışmaktadır. Bu süreci hızlandırmak için ısıl hidroliz, mekanik bozunma, ultrasonik radyasyon (ultrasonikasyon), ozonla arıtımı ile ortama ilave asit ve alkali kimyasalların eklenmesi gibi fiziksel ve kimyasal ön işlemler ...
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