Effect of waste activated sludge pretreatment methods to mitigate Gordonia foaming potential in anaerobic digestion

2020 ◽  
Author(s):  
Aparna Garg ◽  
H. David Stensel ◽  
Bob Bucher ◽  
Pardi Sukapanpotharam ◽  
Mari K. H. Winkler
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Sludge Pretreatment

How does free ammonia-based sludge pretreatment improve methane production from anaerobic digestion of waste activated sludge

Chemosphere ◽  
2018 ◽  
Vol 206 ◽  
pp. 491-501 ◽  
Author(s):  
Dongbo Wang ◽  
Bowen Liu ◽  
Xuran Liu ◽  
Qiuxiang Xu ◽  
Qi Yang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Methane Production ◽  
Free Ammonia ◽  
Waste Activated Sludge ◽  
Sludge Pretreatment

scholarly journals Nitrogen in the Process of Waste Activated Sludge Anaerobic Digestion

2014 ◽  
Vol 40 (2) ◽  
pp. 123-136 ◽  
Author(s):  
Jan Suschka ◽  
Klaudiusz Grübel
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Biogas Production ◽  
Sewage Treatment ◽  
Anaerobic Treatment ◽  
Waste Activated Sludge ◽  
Sludge Digestion ◽  
Sludge Pretreatment ◽  
Negative Side Effects ◽  
Pre Treatment

Abstract Primary or secondary sewage sludge in medium and large WWTP are most often processed by anaerobic digestion, as a method of conditioning, sludge quantity minimization and biogas production. With the aim to achieve the best results of sludge processing several modifications of technologies were suggested, investigated and introduced in the full technical scale. Various sludge pretreatment technologies before anaerobic treatment have been widely investigated and partially introduced. Obviously, there are always some limitations and some negative side effects. Selected aspects have been presented and discussed. The problem of nitrogen has been highlighted on the basis of the carried out investigations. The single and two step - mesophilic and thermophilic - anaerobic waste activated sludge digestion processes, preceded by preliminary hydrolysis were investigated. The aim of lab-scale experiments was pre-treatment of the sludge by means of low intensive alkaline and hydrodynamic disintegration. Depending on the pretreatment technologies and the digestion temperature large ammonia concentrations, up to 1800 mg NH4/dm3 have been measured. Return of the sludge liquor to the main sewage treatment line means additional nitrogen removal costs. Possible solutions are discussed.

A mechanical pretreatment of waste activated sludge for improvement of anaerobic digestion system

1997 ◽  
Vol 36 (12) ◽  
pp. 111-116 ◽  
Author(s):  
Kyung-Yub Hwang ◽  
Eung-Bai Shin ◽  
Hong-Bok Choi
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Protein Concentration ◽  
Waste Activated Sludge ◽  
Cell Rupture ◽  
Mechanical Pretreatment ◽  
Solids Concentration ◽  
Sludge Pretreatment ◽  
Volatile Solids ◽  
Before And After

This study evaluated the effectiveness of sewage pretreatment as it affected the subsequent anaerobic digestion of waste activated sludge (WAS). The key to this sludge pretreatment process was that microorganism cells within WAS were ruptured by mechanical jet and smash under pressurized conditions, 5–50 bar pressure. Cell rupture was estimated by soluble protein concentration (SPC) because the cytoplasm of microorganisms is mainly composed of protein. The SPC in the WAS varied significantly before and after pretreatment. In particular, cell rupture increased from 6% to 43% with the increase of the pretreated pressure (5–30bar), volatile solids concentration and thickening time of WAS. In the WAS pretreatment with long-thickening time (12h < thickening time ≤ 48h), cell rupture was monitored 5–10 % higher than short-thickening time (Oh <thickening time ≤ 12h). Generally, it was observed that higher anaerobic digestion efficiencies of WAS could be obtained according to the increase of microorganism cell rupture through mechanical pretreatment of WAS.

Occurrence, effect, and fate of residual microplastics in anaerobic digestion of waste activated sludge: A state-of-the-art review

2021 ◽  
pp. 125035
Author(s):  
Zhang-Wei He ◽  
Wen-Jing Yang ◽  
Yong-Xiang Ren ◽  
Hong-Yu Jin ◽  
Cong-Cong Tang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
State Of The Art ◽  
Waste Activated Sludge

Modified ADM1 disintegration/hydrolysis structures for modeling batch thermophilic anaerobic digestion of thermally pretreated waste activated sludge

2009 ◽  
Vol 43 (14) ◽  
pp. 3479-3492 ◽  
Author(s):  
Ivan Ramirez ◽  
Alexis Mottet ◽  
Hélène Carrère ◽  
Stéphane Déléris ◽  
Fabien Vedrenne ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Thermophilic Anaerobic Digestion

scholarly journals Experimental and mathematical characterisation of the rheological instability of concentrated waste activated sludge subject to anaerobic digestion

2018 ◽  
Vol 349 ◽  
pp. 318-326 ◽  
Author(s):  
Peng Wei ◽  
Qiuman Tan ◽  
Wim Uijttewaal ◽  
Jules B. van Lier ◽  
Merle de Kreuk
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Waste Activated Sludge

Low temperature thermo-chemical pretreatment of dairy waste activated sludge for anaerobic digestion process

2012 ◽  
Vol 103 (1) ◽  
pp. 415-424 ◽  
Author(s):  
R. Uma Rani ◽  
S. Adish Kumar ◽  
S. Kaliappan ◽  
Ick-Tae Yeom ◽  
J. Rajesh Banu
Keyword(s):  
Anaerobic Digestion ◽  
Low Temperature ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Chemical Pretreatment ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Dairy Waste
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