Anaerobic co-digestion of biodiesel waste glycerin with municipal wastewater sludge: Microbial community structure dynamics and reactor performance

被引：42
作者：
Razaviarani, Vahid [1 ]
Buchanan, Ian D. [1 ]
机构：
[1] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 182卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Mesophilic anaerobic co-digestion; Biodiesel waste glycerin; Municipal wastewater sludge; Reactor performance; Microbial dynamics; BY-PRODUCT; METHANE; BIOREACTOR; PRINCIPLES; HYDROGEN; ACETATE;
D O I：
10.1016/j.biortech.2015.01.095
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Two 10 L completely mixed reactors operating at 37 degrees C and 20 days SRT were used to evaluate the relationships between reactor performance and microbial community dynamics during anaerobic co-digestion of biodiesel waste glycerin (BWG) with municipal wastewater sludge (MWS). The addition of up to 1.35% (v/v) BWG to reactor feeds yielded increased VS and COD removal together with enhanced the biogas production and methane yield. This represented 50% of the MWS feed COD. Pyrosequencing analysis showed Methanosaeta (acetoclastic) and Methanomicrobium (hydrogenotrophic) to be the methanogenic genera present in greatest diversity during stable reactor operation. Methanosaeta sequences predominated at the lowest BWG loading while those of Methanomicrobium were present in greatest abundance at the higher BWG loadings. Genus Candidatus cloacamonas was present in the greatest number of bacterial sequences at all loadings. Alkalinity, pH, biogas production and methane yield declined and VFA concentrations (especially propionate) increased during the highest BWG loading. (c) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：8 / 17
页数：10
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