Identification of recalcitrant compounds after anaerobic digestion with various sludge pretreatment methods

2019 ◽  
pp. 283-302
Keyword(s):  
Anaerobic Digestion ◽  
Sludge Pretreatment ◽  
Recalcitrant Compounds

Recalcitrant compounds formation, their toxicity, and mitigation: Key issues in biomass pretreatment and anaerobic digestion

Chemosphere ◽  
2021 ◽  
pp. 132930
Author(s):  
Gowtham Balasundaram ◽  
Rajesh Banu ◽  
Sunita Varjani ◽  
A.A. Kazmi ◽  
Vinay Kumar Tyagi
Keyword(s):  
Anaerobic Digestion ◽  
Biomass Pretreatment ◽  
Recalcitrant Compounds ◽  
Key Issues

Pretreatment followed by anaerobic digestion of secondary sludge for reduction of sewage sludge volume

2013 ◽  
Vol 67 (11) ◽  
pp. 2527-2533 ◽  
Author(s):  
Naoki Abe ◽  
Yue-Qin Tang ◽  
Makoto Iwamura ◽  
Shigeru Morimura ◽  
Kenji Kida
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Low Pressure ◽  
Gas Production ◽  
Wet Oxidation ◽  
Thermophilic Anaerobic Digestion ◽  
Sludge Pretreatment ◽  
Secondary Sludge ◽  
Digestion Efficiency

The influence of two pretreatment methods, thermal treatment and low-pressure wet oxidation, on the sludge digestion efficiency was examined. Batch thermophilic anaerobic digestion was used to evaluate the effectiveness of the pretreatment methods in terms of volatile suspended solids (VSS) digestion efficiency and gas production. The results showed that the gas production was not proportional to the VSS degradation efficiency of either thermal treatment or low-pressure wet oxidation. Low-pressure wet oxidation treatment at 150 °C along with 40% of the theoretical oxygen required to oxidize organic carbon gave the highest gas production and the VSS digestion efficiency of 77% at a VSS loading rate of 8 g l−1 d−1. The digestion efficiency was about 30% higher than that of thermophilic anaerobic digestion without sludge pretreatment. Sewage sludge could be treated effectively at a high VSS digestion efficiency with this pretreatment followed by thermophilic anaerobic digestion.

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

Effects on anaerobic digestion of sewage sludge pretreatment

1997 ◽  
Vol 35 (10) ◽  
pp. 207-211 ◽  
Author(s):  
H. B. Choi ◽  
K. Y. Hwang ◽  
E. B. Shin
Keyword(s):  
Anaerobic Digestion ◽  
Protein Concentration ◽  
Operating Conditions ◽  
Waste Activated Sludge ◽  
Batch Experiments ◽  
Mechanical Pretreatment ◽  
Sludge Pretreatment ◽  
Volatile Solids ◽  
Vs Removal ◽  
Removal Efficiencies

This research investigates the effect of sludge pretreatment on the anaerobic digestion of waste-activated sludge (WAS). In the key of this sludge pretreatment process, bacteria in the WAS were ruptured by mechanical jet and smashed under pressurized conditions. The protein concentrations in the sludge varied significantly after pretreatment. Protein concentration increased according to jet times and pressure. In batch experiments, volatile solids (VS) removal efficiencies were 13∼50% when the WAS pretreated once under 30 bar was fed into an anaerobic digester with 2∼26 day retention time. In the same operating conditions, when intact WAS was fed into the digester, VS removal efficiencies were 2∼35%. Therefore, it is recognized that higher digestion efficiencies of the WAS were obtained through a mechanical pretreatment of sludge.

Sign in / Sign up

Export Citation Format

Share Document