城市生物废物的湿度对中温和高温干式厌氧消化的启动和效率的影响。
Effect of moisture of municipal biowaste on start-up and efficiency of mesophilic and thermophilic dry anaerobic digestion.
机构信息
Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany.
Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany; University of Applied Science, Hochschule Emden Leer, Faculty of Technology, Microbiology - Biotechnology, Constantia Platz 4, D-26723 Emden, Germany.
出版信息
Bioresour Technol. 2014 Sep;168:23-32. doi: 10.1016/j.biortech.2014.02.118. Epub 2014 Mar 5.
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 by Methanosarcinales and Methanomicrobiales. In all assays Pelotomaculum and Syntrophobacter species were dominant propionate degraders.
采用箱式干法厌氧消化工艺，在 20、37 和 55°C 下，用 20%-30%（干物质）含水率的生物废物来生产甲烷和确定相关功能菌。在 20、37 和 55°C 下，20%DM 含量的干法厌氧消化与湿法厌氧消化具有相同的消化效率，在 37 和 55°C 下，25%DM 含量的干法厌氧消化也具有相同的消化效率。在 20、37 或 55°C 下，30%DM 含量的干法厌氧反应器中几乎没有或只有少量甲烷产生。尽管在 30%DM 含量的中温和高温生物废物反应器中，古菌的数量明显较少，但系统发育上更加多样化，但在 20%-30%DM 含量的生物废物反应器中，种群密度相似。在 20%和 25%DM 试验中，沼气的产生由 Methanosarcinales 和 Methanomicrobiales 催化。在所有试验中，Pelotomaculum 和 Syntrophobacter 物种都是主要的丙酸降解菌。
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