Biogas production through syntrophic acetate oxidation and deliberate operating strategies for improved digester performance

被引:238
作者
Westerholm, Maria [1 ]
Moestedt, Jan [2 ]
Schnurer, Anna [1 ]
机构
[1] Swedish Univ Agr Sci, Dept Microbiol, Uppsala BioCtr, Box 7025, SE-75007 Uppsala, Sweden
[2] Tekniska Verken Linkoping AB Publ, Dept Biogas R&D, Box 1500, SE-58115 Linkoping, Sweden
关键词
Syntrophic acetate oxidising bacteria; Methanogens; Ammonia inhibition; Operational parameters; Trace metals; Temperature; THERMOPHILIC ANAEROBIC-DIGESTION; MICROBIAL COMMUNITY STRUCTURE; NON-ACETICLASTIC METHANOGENESIS; INTERSPECIES ELECTRON-TRANSFER; TRACE-ELEMENT ADDITION; VOLATILE FATTY-ACIDS; AMMONIA INHIBITION; SP NOV; HYDROGENOTROPHIC METHANOGENESIS; METHANE PRODUCTION;
D O I
10.1016/j.apenergy.2016.06.061
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Anaerobic degradation of protein-rich materials has high methane potential and produces nutrient-rich residue, but requires strategies to avoid ammonia inhibition. A well-adapted process can cope with substantially higher ammonia levels than an unadapted process and analyses of pathways for methanisation of acetate, combined with determination of microbial community structure, strongly indicate that this is due to a significant contribution of syntrophic acetate oxidation. The microorganisms involved in syntrophic acetate oxidation thus most likely occupy a unique niche and play an important role in methane formation. This review summarises current insight of syntrophic acetate oxidising microorganisms, their presence and the detection of novel species and relate these observations with operating conditions of the biogas processes in order to explore contributing factors for development of an ammonia-tolerant microbial community that efficiently degrades acetate through the syntrophic pathway. Besides high ammonia level, acetate concentration, temperature and methanogenic community structure are considered in this review as likely factors that shape and influence SAO-mediated microbial ecosystems. The main purpose of this review is to facilitate process optimisation through considering the activity and growth of this key microbial community. (C) 2016 The Authors. Published by Elsevier Ltd.
引用
收藏
页码:124 / 135
页数:12
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