Effect of moisture of municipal biowaste on start-up and efficiency of mesophilic and thermophilic dry anaerobic digestion.

Effect of moisture of municipal biowaste on start-up and efficiency of mesophilic and thermophilic dry anaerobic digestion.
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城市生物垃圾水分对中温和高温干式厌氧消化启动和效率的影响

DOI:
10.1016/j.biortech.2014.02.118
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发表时间:
2014
影响因子:
11.4
通讯作者:
C. Gallert
C. Gallert
中科院分区:
工程技术1区
文献类型:
--
作者:
Ch. Li;Ch. Mörtelmaier;J. Winter;C. Gallert

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测定了20℃、37℃和55℃条件下箱式干式厌氧消化含20-30%干物质(DM)的生物垃圾和贡献菌发酵产甲烷的情况。在20℃、37℃和55℃条件下,干厌氧消化中干物质含量为20%,37℃和55℃时干厌氧消化中DM含量为25%,在20℃、37℃和55℃时,DM含量为30%的干式厌氧反应器中没有或只有少量甲烷产生。37℃或55℃时,含有20-30%DM的生物垃圾反应器中的种群密度相似,但在DM含量为30%的中温和高温生物垃圾反应器中,种群密度显着减少,但在系统发育上存在更多多样性的古菌。在20%和25%的DM试验中,甲烷肉芽胞杆菌和甲烷微生物菌对沼气的产生有催化作用。在所有的分析中,藻类和合养细菌是丙酸的主要降解者。
Methane production from biowaste with 20–30% dry matter (DM) by box-type dry anaerobic digestion and contributing bacteria were determined for incubation at 20, 37 and 55 °C. The same digestion efficiency as for wet anaerobic digestion of biowaste was obtained for dry anaerobic digestion with 20% DM content at 20, 37 and 55 °C and with 25% DM content at 37 and 55 °C. No or only little methane was produced in dry anaerobic reactors with 30% DM at 20, 37 or 55 °C.Population densities in the 20–30% DM-containing biowaste reactors were similar although in mesophilic and thermophilic biowaste reactors with 30% DM content significantly less but phylogenetically more diverse archaea existed. Biogas production in the 20% and 25% DM assays was catalyzed byMethanosarcinalesandMethanomicrobiales. In all assaysPelotomaculumandSyntrophobacterspecies were dominant propionate degraders.
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