PERFORMANCE, MICROBIAL COMMUNITY ANALYSIS AND FERTILIZER VALUE OF ANAEROBIC CO-DIGESTION OF CATTLE MANURE WITH WASTE KITCHEN OIL 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Applied Engineering in Agriculture
年/卷/期
2019 / 35 / 2
页码
239-248
ISSN号
0883-8542
作者单位
Univ Sao Paulo, Dept Anim Prod & Nutr, Pirassununga, SP, Brazil;Univ Missouri, Dept Food Syst & Bioengn, Columbia, MO USA;Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX USA;Univ Sao Paulo, Dept Anim Prod & Nutr, Pirassunga, SP, Brazil;
作者
Nogueira, R. G. S.;Lim, T. T.;Wang, H.;Rodrigues, P. H. M.;
摘要
Co-digestion trials of beef cattle manure and waste kitchen oil (WKO) were conducted to evaluate potential increase of biogas production for a local beef farm anaerobic digester. The trials were conducted using laboratory-scale, semi-continuously loaded digesters under mesophilic conditions, with 21-day hydraulic retention time (HRT). In a preliminary test, WKO was added at 0%, 0.5%, 1.0%, 1.5%, and 2.0% by volume, each with replicate digesters (n=2), except for the 0% level, which had one digester (n=1). Methane (CH4) yield per week increased linearly with WKO levels. Populations of bacteriodetes decreased, while clostridiales and synergistales increased with the WKO levels. A second test was conducted using treatments with more replication: control (n=3), and 1.0% (n=3) and 2% (n=3) WKO levels. Methane yields of the 1.0% and 2.0% WKO levels were 79.1% and 203% higher than the control, respectively. Addition of WKO have resulted in changes of the metagenomics of the digesters. Populations of clostridiales increased, while bacteroidales and euryarchaeota methanomicrobia YC-E6 decreased with the WKO levels. The findings confirm adding low amounts (1% and 2%) of WKO as co-digestion feedstock can be an effective way to increase CH4 yield for beef operation anaerobic digestion, especially when there are available feedstock nearby.
机翻摘要
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关键词/主题词
Anaerobic digestion;Biogas;Methane;Semi-continuous digesters;
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