Abstract：
:The anaerobic digestion of filter cake and its co-digestion with bagasse, and the effect of gradual increase of the organic loading rate (OLR) from start-up to overload were investigated. Understanding the influence of environmental and technical parameters on the development of particular methanogenic pathway in the biogas process was an important aim for the prediction and prevention of process failure. The rapid accumulation of volatile organic acids at high OLR of 3.0 to 4.0 gvs·L⁻¹·day⁻¹ indicated strong process inhibition. Methanogenic community dynamics of the reactors was monitored by stable isotope composition of biogas and molecular biological analysis. A potential shift toward the aceticlastic methanogenesis was observed along with the OLR increase under stable reactor operating conditions. Reactor overloading and process failure were indicated by the tendency to return to a predominance of hydrogenotrophic methanogenesis with rising abundances of the orders Methanobacteriales and Methanomicrobiales and drop of the genus Methanosarcina abundance.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Leite AF,Janke L,Lv Z,Harms H,Richnow HH,Nikolausz Mdoi
10.3390/ijms161023210subject
Has Abstractpub_date
2015-09-25 00:00:00pages
23210-26issue
10issn
1422-0067pii
ijms161023210journal_volume
16pub_type
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