Results 211 to 220 of about 71,385 (248)

Closed cycle of recycling of waste activated sludge

Waste Management, 2018
The recycling of waste activated sludge (WAS) formed in the process of biological purification of sewage is an urgent ecological problem. In the present work, two ways of recycling of WAS containing from 8 to 30% free water, namely, the synthesis of a carbon-containing component and synthesis of porous building ceramics (bricks) with the use of WAS and
Marina Vlasova, Abigail Parra Parra, Pedro Antonio Márquez Aguilar, Ariadna Trujillo Estrada, Veronica González Molina, Mykola Kakazey, Tamara Tomila, Virginia Gómez-Vidales   +7 more
openaire   +2 more sources

Bench-scale ozonation study of waste activated sludge

Journal of Environmental Science and Health, Part A, 2009
A bench-scale ozonation study was conducted on waste activated sludge (WAS) in a 10-L, clear PVC, semi-batch, bubble column reactor. Two separate runs were performed on 5-L samples of WAS obtained from the Rocky Creek Wastewater Treatment Plant (WWTP) in Macon, Georgia.
Richard O, Mines, Laura W, Lackey
openaire   +2 more sources

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
openaire   +2 more sources

Dewaterability of waste activated sludge with ultrasound conditioning

Bioresource Technology, 2009
This study investigated the potential benefits of ultrasound-conditioned sludge dewatering treatments with specific energy dosages from 0 to 35,000 kJ/kg total solids (TS). Capillary suction time (CST) and specific resistance of filtration (SRF) were used to evaluate sludge dewaterability.
Xin, Feng, Jinchuan, Deng, Hengyi, Lei, Tao, Bai, Qingjuan, Fan, Zhaoxu, Li   +5 more
openaire   +2 more sources

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.
openaire   +1 more source

Anaerobic bioleaching of metals from waste activated sludge

Science of The Total Environment, 2015
Heavy metal contamination of anaerobically digested waste activated sludge hampers its reuse as fertilizer or soil conditioner. Conventional methods to leach metals require aeration or the addition of leaching agents. This paper investigates whether metals can be leached from waste activated sludge during the first, acidifying stage of two-stage ...
Roel J.W. Meulepas, Graciela Gonzalez-Gil, Fitfety Melese Teshager, Ayoma Witharana, Pascal E. Saikaly, Piet N.L. Lens   +5 more
openaire   +3 more sources

Enzyme activities in waste water and activated sludge

Water Research, 1992
Abstract The purpose of the present study was to evaluate the potential of selected enzyme activity assays to determine microbial abundance and heterotrophic activity in waste water and activated sludge. In waste water, esterase and dehydrogenase activities were found to correlate with microbial abundance measured as colony forming units of ...
Ole Nybroe, Per Elberg Jørgensen, Mogens Henze   +2 more
openaire   +1 more source

Winery waste recycling through anaerobic co-digestion with waste activated sludge

Waste Management, 2014
In this study biogas and high quality digestate were recovered from winery waste (wine lees) through anaerobic co-digestion with waste activated sludge both in mesophilic and thermophilic conditions. The two conditions studied showed similar yields (0.40 m(3)/kgCODfed) but different biological process stability: in fact the mesophilic process was ...
DA ROS, CINZIA, CAVINATO, Cristina, PAVAN, Paolo, D. Bolzonella   +3 more
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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
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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
openaire   +1 more source