瘤胃
发酵
生物反应器
化学
水解
食品科学
中性洗涤纤维
水力停留时间
化学需氧量
微生物联合体
厌氧消化
制浆造纸工业
生物
纤维
微生物
甲烷
细菌
生物化学
流出物
废水
废物管理
有机化学
工程类
遗传学
作者
Xavier Fonoll,Kuang Zhu,Lucy Aley,Shilva Shrestha,Lutgarde Raskin
标识
DOI:10.1021/acs.est.3c06478
摘要
An anaerobic dynamic membrane bioreactor (AnDMBR) mimicking rumen conditions was developed to enhance the hydrolysis of lignocellulosic materials and the production of volatile fatty acids (VFAs) when treating food waste. The AnDMBR was inoculated with cow rumen content and operated at a 0.5 day hydraulic retention time, 2–4 day solids retention time, a temperature of 39 °C, and a pH of 6.3, characteristics similar to those of a rumen. Removal rates of neutral detergent fiber and acid detergent fiber of 58.9 ± 8.4 and 69.0 ± 8.6%, respectively, and a VFA yield of 0.55 ± 0.12 g VFA as chemical oxygen demand g volatile solids (VS)fed–1 were observed at an organic loading rate of 18 ± 2 kg VS m–3 day–1. The composition and activity of the microbial community remained consistent after biofilm disruption, bioreactor upset, and reinoculation. Up to 66.7 ± 5.7% of the active microbial populations and 51.0 ± 7.0% of the total microbial populations present in the rumen-mimicking AnDMBR originated from the inoculum. This study offers a strategy to leverage the features of a rumen; the AnDMBR achieved high hydrolysis and fermentation rates even when treating substrates different from those fed to ruminants.
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