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Maximum organic loading rate for the single-stage wet anaerobic digestion of food waste

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Aug 2012Publisher:Elsevier BVJournal:Bioresource Technology, volume 118, pages 210-218 (issn: 0960-8524,

Authors: Nobuyuki Tajima; Norio Kurosawa; Tatsuki Toda; Tatsushi Matsuyama; Minako Kawai; Chiaki Niwa; Fatimah Md-D. Yusoff; +1 Authors

doi: 10.1016/j.biortech.2012.05.045

pmid: 22705526

Maximum organic loading rate for the single-stage wet anaerobic digestion of food waste

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Abstract

Anaerobic digestion of food waste was conducted at high OLR from 3.7 to 12.9 kg-VS m(-3) day(-1) for 225 days. Periods without organic loading were arranged between the each loading period. Stable operation at an OLR of 9.2 kg-VS (15.0 kg-COD) m(-3) day(-1) was achieved with a high VS reduction (91.8%) and high methane yield (455 mL g-VS-1). The cell density increased in the periods without organic loading, and reached to 10.9×10(10) cells mL(-1) on day 187, which was around 15 times higher than that of the seed sludge. There was a significant correlation between OLR and saturated TSS in the sludge (y=17.3e(0.1679×), r(2)=0.996, P<0.05). A theoretical maximum OLR of 10.5 kg-VS (17.0 kg-COD) m(-3) day(-1) was obtained for mesophilic single-stage wet anaerobic digestion that is able to maintain a stable operation with high methane yield and VS reduction.

Related Organizations

Universiti Putra Malaysia
Malaysia
Universiti Putra Malaysia
Malaysia
Soka University of America
United States
Soka University
Japan
Soka University of America
United States

Keywords

Waste Products, Time Factors, Bacteria, Sewage, Colony Count, Microbial, Water, Hydrogen-Ion Concentration, Fatty Acids, Volatile, Bioreactors, Food, Biofuels, Anaerobiosis, Organic Chemicals, Volatilization, Methane, Biotechnology

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