Results 201 to 210 of about 1,804,647 (233)

Aerobic Digestion of Waste Activated Sludge

Journal of the Environmental Engineering Division, 1979
Activated sludge that had been grown on a completely soluble wastewater in a pilot plant was subjected to aerobic digestion in batch, lab-scale reactors. During the course of digestion, destruction of nonvolatile solids occured so that is was preferable to express the kinetics of digestion upon the loss of total suspended solids rather than volatile ...
C. Scott Reece, C. P. Leslie Grady, Ralph E. Roper   +2 more
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Anaerobic Digestion of Waste Activated Sludge

Journal of the Environmental Engineering Division, 1982
The 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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Effects and model of alkaline waste activated sludge treatment

Bioresource Technology, 2008
Due 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, Yiying, Jin, RasoolBux, Mahar, Zhiyu, Wang, Yongfeng, Nie   +4 more
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Enhancement of solubilization and acidification of waste activated sludge by pretreatment

Waste Management, 2008
The effects of various pretreatment methods, including thermo-acid, thermo-alkaline, ultrasonic-alkaline and ultrasonic-acid, on solubilization and subsequent acidification efficiency of waste activated sludge (WAS) were investigated. The results showed that both thermo-alkaline and ultrasonic-alkaline significantly improved the solubilization of WAS ...
Xiaoling, Liu, He, Liu, Jinhuan, Chen, Guocheng, Du, Jian, Chen   +4 more
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Rheological characterization of thermal hydrolysed waste activated sludge

Water Research, 2019
Rheological 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, Ehsan Farno, Saeid Baroutian, Rajarathinam Parthasarathy, Nicky Eshtiaghi   +4 more
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Bulking of dairy waste activated sludge

Water Research, 1968
Abstract 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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Waste Activated Sludge Disintegration in an Ultrasonic Batch Reactor

CLEAN – Soil, Air, Water, 2008
AbstractThe production of excess sludge is one of the most serious challenges in biological wastewater treatment. In the present work, disintegration is added as a new additional unit operation in a wastewater treatment plant, and the main objective is to reduce the amount of excess sludge.
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Modelling codigestion of food waste and waste activated sludge

2018
Albeit 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, V Di Castro, A Gallipoli, A Gianico, CM Braguglia   +4 more
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EFFECTS OF ULTRASONIC TREATMENT ON THE WASTE ACTIVATED SLUDGE

2010
Aktif 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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Thermochemical hydrolysis of waste activated sludge

2005
In this study, thermochemical hydrolysis of the waste activated sludge collected from the biological treatment plant of a food industry has been investigated. Thermochemical hydrolysis was used as a pretreatment method to reduce the production of waste activated sludge.
TÜRKER, MUSTAFA, VELİ, SEVİL, FERSİZ, SEVGİ   +2 more
openaire   +1 more source