协同消化食物废物和废水生物固体中的微生物群落。
Microbial communities in co-digestion of food wastes and wastewater biosolids.
机构信息
Chemical and Biochemical Engineering, University of Western Ontario, London, ON N6A 5B9, Canada.
Civil and Environmental Engineering, University of Western Ontario, London, ON N6A 5B9, Canada.
出版信息
Bioresour Technol. 2019 Oct;289:121580. doi: 10.1016/j.biortech.2019.121580. Epub 2019 May 30.
The effect of food waste (FW) co-digestion with wastewater biosolids (WWB) on microbial communities was investigated through running thirteen lab-scale digesters for 100 days at different operational conditions i.e. organic loading rates (2 and 4 kgCOD/m·day), feed types (WWB and FW), and FW content (10%, 90%, 100%). Compared with mono-digestion of WWB, FW co-digestion enhanced biogas production by 13% and COD degradation rates by up to 101%. Among fermentative bacteria/acetogens, Syntrophomonas was the dominant genus in FW digesters in contrast to the dominance of Clostridium in WWB digesters. The predominant methanogen was Methanosarcina in FW digesters in contrast to Methanosaeta in WWB digesters. COD degradation rates and methane yields were well correlated with Bacteroidetes population. Methane production rate was well correlated with Clostridium for FW digesters, with syntrophs for WWB digesters, and with aceticlastic methanogens for both digesters. Synergism was associated with hydrolytic bacteria, Clostridium, Syntrophomonas, syntrophs, Methanosarcina, and Methanobacterium.
研究了在不同运行条件下（即有机负荷率（2 和 4 kgCOD/m·天）、进料类型（废水生物固体和食物废物）和食物废物含量（10%、90%、100%）下，食物废物（FW）与废水生物固体（WWB）共消化对微生物群落的影响。与 WWB 的单消化相比，FW 共消化使沼气产量提高了 13%，COD 降解率提高了 101%。在发酵细菌/产乙酸菌中，Syntrophomonas 是 FW 消化器中的主要属，而在 WWB 消化器中则是 Clostridium 占主导地位。FW 消化器中的主要产甲烷菌是 Methanosarcina，而 WWB 消化器中的主要产甲烷菌是 Methanosaeta。COD 降解率和甲烷产量与拟杆菌门的种群密切相关。FW 消化器中的甲烷生成速率与梭菌有关，与 WWB 消化器中的产氢产乙酸菌有关，与两种消化器中的乙酸营养型产甲烷菌有关。协同作用与水解细菌、梭菌、Syntrophomonas、产氢产乙酸菌、Methanosarcina 和 Methanobacterium 有关。
Zotero 插件