title: Evaluation of electricity generation from ultrasonic and heat/alkaline pretreatment of different sludge types using microbial fuel cells.
abstract: This study investigated the effects of different sludge pretreatment methods (ultrasonic vs. combined heat/alkali) with varied sources of municipal sewage sludge (primary sludge (PS), secondary excess sludge (ES), anaerobic digestion sludge (ADS)) on electricity generation in microbial fuel cells (MFCs). Introduction of ultrasonically pretreated sludge (PS, ES, ADS) to MFCs generated maximum power densities of 13.59, 9.78 and 12.67mW/m(2) and soluble COD (SCOD) removal efficiencies of 87%, 90% and 57%, respectively. The sludge pretreated by combined heat/alkali (0.04N NaOH at 120°C for 1h) produced maximum power densities of 10.03, 5.21 and 12.53mW/m(2) and SCOD removal efficiencies of 83%, 75% and 74% with PS, ES and ADS samples, respectively. Higher SCOD by sludge pretreatment enhanced performance of the MFCs and the electricity generation was linearly proportional to the SCOD removal, especially for ES.
authors.affiliation: Department of Biological Environment, Kangwon National University, Chuncheon, Gangwon 200-701, Republic of Korea.
authors.forename: Sang-Eun
authors.initials: SE
authors.lastname: Oh
authors.affiliation: Department of Environmental Science & Biotechnology, Institute of Energy & Environment, Hallym University, Chuncheon, Gangwon 200-702, Republic of Korea.
authors.forename: Joung Yee
authors.initials: JY
authors.lastname: Yoon
authors.affiliation: Department of Biological Environment, Kangwon National University, Chuncheon, Gangwon 200-701, Republic of Korea.
authors.forename: Anup
authors.initials: A
authors.lastname: Gurung
authors.affiliation: Department of Environmental Science & Biotechnology, Institute of Energy & Environment, Hallym University, Chuncheon, Gangwon 200-702, Republic of Korea. Electronic address: dongjin@hallym.ac.kr.
authors.forename: Dong-Jin
authors.initials: DJ
authors.lastname: Kim
mesh_terms: D000085:Acetates / Q000378:metabolism; D000468:Alkalies / Q000494:pharmacology*; D000693:Anaerobiosis; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D057919:Biological Oxygen Demand Analysis; D004560:Electricity; D004583:Electrons; D005947:Glucose / Q000378:metabolism; D006358:Hot Temperature; D009930:Organic Chemicals / Q000494:pharmacology; D012722:Sewage / Q000382:microbiology*; D012972:Sodium Hydroxide / Q000494:pharmacology; D014465:Ultrasonics; D018508:Water Purification / Q000379:methods*
chemical_list: D000085:Acetates; D000468:Alkalies; D009930:Organic Chemicals; D012722:Sewage; D012972:Sodium Hydroxide; D005947:Glucose
keywords: COD removal; Electricity generation; Heat/alkali sludge pretreatment; Microbial fuel cell; Ultrasonic sludge pretreatment