Improved biogas production and biodegradation of oilseed rape straw by using kitchen waste and duck droppings as co-substrates in two-phase anaerobic digestion | Zendy

Chuqiao Wang | Zendy; Feng Hong | Zendy; Yong Lu | Zendy; Xianning Li | Zendy; Hengming Liu | Zendy

Open Access

Improved biogas production and biodegradation of oilseed rape straw by using kitchen waste and duck droppings as co-substrates in two-phase anaerobic digestion

Author(s) -

Chuqiao Wang,

Feng Hong,

Yong Lu,

Xianning Li,

Hengming Liu

Publication year - 2017

Publication title -

plos one

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 332

ISSN - 1932-6203

DOI - 10.1371/journal.pone.0182361

Subject(s) - biodegradation , biogas , anaerobic digestion , straw , methane , biogas production , rice straw , pulp and paper industry , anaerobic exercise , chemistry , environmental science , degradation (telecommunications) , bioenergy , waste management , zoology , agronomy , biofuel , biology , microbiology and biotechnology , organic chemistry , engineering , physiology , telecommunications

Oilseed rape straw (ORS) is a kind of biorefractory waste widely existing in the rural area of China, which is highly suitable to mix with kitchen waste (KW) and duck droppings (DD) in two-phase anaerobic digestion (AD). This research introduced the importance of KW and DD addition to improve the biogas production and biodegradation of ORS. A set of comparative experiments were conducted on two-phase mono- and co-digestion with organic load of 60 g VS/L. The total methane yield (TMY) and the biodegradation of ORS of co-digestions were obviously improving, and the synergistic effect found in the two-phase co-digestions. The optimum mixing ratio of ORS, KW and DD was 50:40:10, and the corresponding TMY and VS degradation rate of ORS were 374.5 mL/g VS and 49.7%, respectively. Addition of KW and DD maintained the pH within the optimal range for the hydrolyzing-acidification, improved the phase separation and buffering capacity of AD system.

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