Influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste

Journal of Zhejiang University. Science. B
Man-chang WuYong Zhang

Abstract

A laboratory-scale experiment was carried out to assess the influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste (MOSW). Heating failure was simulated by decreasing temperature suddenly from 55 degrees C to 20 degrees C suddenly; 2 h time is needed for temperature decrease and recovery. Under the conditions of 8.0 g/(L.d) and 15 d respectively for MOSW load and retention time, following results were noted: (1) biogas production almost stopped and VFA (volatile fatty acid) accumulated rapidly, accompanied by pH decrease; (2) with low temperature (20 degrees C) duration of 1, 5, 12 and 24 h, it took 3, 11, 56 and 72 h for the thermophilic anaerobic digestion system to reproduce methane after temperature fluctuation; (3) the longer the low temperature interval lasted, the more the methanogenic bacteria would decay; hydrolysis, acidification and methanogenesis were all influenced by temperature fluctuation; (4) the thermophilic microorganisms were highly resilient to temperature fluctuation.

Citations

Feb 13, 2010·Critical Reviews in Biotechnology·P C SuryawanshiR M Kothari
Nov 1, 2012·Critical Reviews in Biotechnology·M A De la RubiaR Borja
Dec 11, 2007·Waste Management·M López Torres, Ma del C Espinosa Lloréns
Feb 12, 2008·Bioresource Technology·René Alvarez, Gunnar Lidén
Dec 18, 2018·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Senem ÖnenKerstin Kuchta
Dec 5, 2009·Applied Microbiology and Biotechnology·Manfred LübkenMarc Wichern
Jul 17, 2021·The Science of the Total Environment·Bishav BhattaraiRamesh Goel

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