Journal
PROCESS BIOCHEMISTRY
Volume 48, Issue 9, Pages 1441-1445Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.procbio.2013.04.016
Keywords
Anaerobic digestion; Start-up; Swine wastewater; Operating temperature; Starvation; Microbial community structure
Categories
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korean Ministry of Knowledge Economy [20103020090050]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20103020090050] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The aim of this study was to monitor the changes in methanogenic community structures in an anaerobic digester (250 m(3) working volume) during start-up including prolonged starvation periods. Redundancy analysis was performed to investigate the correlations between environmental variables and microbial community structures. The anaerobic digester was operated for 591 days at alternating operating temperatures. In initial start-up period at stage I (35 degrees C), growth of various species of mesophilic aceti-clastic methanogens (AMs) and hydrogenotrophic methanogens (HMs) was observed. Methanobacteriales species survived better than other methanogens under long-term starvation conditions. In stage II (50 degrees C), HMs became dominant over AMs as the operating temperature changed from mesophilic to thermophilic due to increase of ammonia inhibition. In stage III (35 degrees C), only the Methanomicrobiales population significantly increased during 50 days of HRT while Methanobacteriales dominated over 15 days of HRT. The influent pH negatively correlated with all methanogenic populations especially in stage II. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available