Degradation and characteristic changes of organic matter in sewage sludge using microbial fuel cell with ultrasound pretreatment.
Microbial fuel cell (MFC) could be an efficient sludge treatment unit in regard of rates and extents of total chemical oxygen demand (TCOD) removal, particularly when ultrasound was applied to pretreat the sludge. This study characterized the organic matter in sludge before and after MFC treatment, with or without ultrasound as a pretreatment stage. The 5-d MFC tests with electric load significantly enhanced TCOD removal rate from 11.3% to 19.2% for raw sludge and from 25% to 57% for sludge pretreated with >0.6 W ml(-1) ultrasound, using conventional anaerobic digestion test (without electric load) as control. The aromatic proteins, soluble microbial byproduct-like fluorescent compounds and carboxylic components, aliphatic components (C-H related), hydrocarbon and carbohydrate materials were identified to be principally released by ultrasound pretreatment and the fuels in the present MFC study.
Jiang
Junqiu
J
State Key Laboratory of Urban Water Resources and Environments, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Zhao
Qingliang
Q
Wei
Liangliang
L
Wang
Kun
K
Lee
Duu-Jong
DJ
D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources / Q000382:microbiology; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000737:chemistry / Q000302:isolation & purification; D004560:Electricity; D005285:Fermentation; D006838:Hydrocarbons / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D009930:Organic Chemicals / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D011506:Proteins / Q000737:chemistry / Q000145:classification; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D012995:Solubility; D013997:Time Factors; D014465:Ultrasonics
D002241:Carbohydrates; D006838:Hydrocarbons; D009930:Organic Chemicals; D011506:Proteins; D012722:Sewage; D010100:Oxygen