Results 221 to 230 of about 178,624 (294)

Predicting the Degradability of Waste Activated Sludge

Water Environment Research, 2008
The objective of this study was to identify methods for estimating anaerobic digestibility of waste activated sludge (WAS). The WAS streams were generated in three sequencing batch reactors (SBRs) treating municipal wastewater. The wastewater and WAS properties were initially determined through simulation of SBR operation with BioWin (EnviroSim ...
Richard, Jones, Wayne, Parker, Henry, Zhu, Dwight, Houweling, Sudhir, Murthy   +4 more
openaire   +2 more sources

Zerovalent Iron Effectively Enhances Medium-Chain Fatty Acids Production from Waste Activated Sludge through Improving Sludge Biodegradability and Electron Transfer Efficiency.

Environmental Science and Technology, 2020
A novel zerovalent iron (ZVI) technique to simultaneously improve the production of medium-chain fatty acids (MCFAs) from waste activated sludge (WAS) and enhance WAS degradation during anaerobic WAS fermentation was proposed in this study.
Yun Wang, Wei Wei, Shu-Lin Wu, B. Ni
semanticscholar   +1 more source

Oxidation and ozonation of waste activated sludge

Journal of Environmental Science and Health, Part A, 2008
In this bench-scale study, the treatment of waste activated sludge (WAS) was evaluated using aerobic digestion and ozonation. Two, 2-L batch digesters, one aerated and the other one ozonated, were operated for 30 days in each phase of the study. The aerated digester simulated the aerobic digestion process and served as control to the ozonated digester.
Richard O, Mines, C Brett, Northenor, Mitchell, Murchison   +2 more
openaire   +2 more sources

Unraveling the role of polyferric chloride in anaerobic digestion of waste activated sludge.

Bioresource Technology, 2021
This study explored the effect of polyferric chloride (PFC) as a flocculant on waste activated sludge anaerobic digestion. The results verified that PFC has an inhibitory effect on methane production during anaerobic digestion.
Sijing Zhu, Hongbo Chen
semanticscholar   +1 more source

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
openaire   +1 more source

Polysorbate-80 pretreatment contributing to volatile fatty acids production associated microbial interactions via acidogenic fermentation of waste activated sludge.

Bioresource Technology, 2021
Polyoxyethylene dehydration sorbitol monooleate (polysorbate-80) pretreatment enhanced volatile fatty acids (VFAs) production of waste activated sludge (WAS) in acidogenic fermentation.
Xiaohuan Ai, Xiaodong Xin, Wenxuan Wei, Jiaqian Xie, J. Hong   +4 more
semanticscholar   +1 more source

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
openaire   +1 more source

Polyvinyl Chloride Microplastics Affect Methane Production from the Anaerobic Digestion of Waste Activated Sludge through Leaching Toxic Bisphenol-A.

Environmental Science and Technology, 2019
The retention of polyvinyl chloride (PVC) microplastics in sewage sludge during wastewater treatment raises concerns. However, the effects of PVC microplastics on methane production from anaerobic digestion of waste activated sludge (WAS) have never been
Wei Wei, Qi-Su Huang, Jing Sun, Jun-Yue Wang, Shu-Lin Wu, B. Ni   +5 more
semanticscholar   +1 more source

New sludge pretreatment method to improve dewaterability of waste activated sludge

Bioresource Technology, 2011
The enhancements of electrolysis-pretreated conditioning were investigated in this study. Normalized capillary suction time (CST) was used to evaluate sludge dewaterability. Extracellular polymeric substance (EPS) concentration, viscosity and scanning electron microscopy (SEM) were determined to explain the observed changes in conditioning process.
Hai-ping, Yuan, Xiao-bo, Cheng, Shan-ping, Chen, Nan-wen, Zhu, Zhen-ying, Zhou   +4 more
openaire   +2 more sources

Redox-Active Biochar and Conductive Graphite Stimulate Methanogenic Metabolism in Anaerobic Digestion of Waste-Activated Sludge: Beyond Direct Interspecies Electron Transfer

, 2020
Graphite and pyrolytic biochar are two electrically active but functionally distinct carbon materials that have been widely used to enhance methanogenic performance of anaerobic digestion (AD) of waste-activated sludge (WAS) for energy recovery. However,
Chengxin Lü, Yanwen Shen, Chao Li, N. Zhu, Haiping Yuan   +4 more
semanticscholar   +1 more source