Anaerobic co-digestion of sewage sludge and food waste for hydrogen and VFA production with microbial community analysis
Anaerobic co-digestion of sewage sludge and food waste for hydrogen and VFA production with microbial community analysis
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通过微生物群落分析，对污水污泥和食物垃圾进行厌氧共消化生产氢气和 VFA
DOI：
10.1016/j.wasman.2018.06.046
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发表时间：
2018-08-01
期刊：
影响因子：
8.1
通讯作者：
He, Ning
中科院分区：
文献类型：
--
作者：
Li, Zhipeng;Chen, Zhen;He, Ning
研究了餐厨垃圾与城市污泥混合厌氧消化产氢和挥发性脂肪酸的特性。结果表明，混合厌氧消化可使产氢量提高62.4%（v/v），比单独厌氧消化提高29.89%，VFA总产量达到281.84 mg/g挥发性固体（VS），提高8.38%。这种提高主要是由于多基质特性的改善，这是通过提供较高的溶解性化学需氧量（23.78-32.14 g/L）和适宜的pH（6.12-6.51），总氨氮降低18.67%，并确保适当的碳/氮比（15.01-23.01）获得的。利用响应面优化法对发酵液的最大产氢量（62.39 mL/g VS）和总VFA产率（294.63 mg/g VS）进行了优化，得到的FW百分比分别为85.17%和79.87%。焦磷酸测序分析表明，在优化条件下，VFA和产氢相关的优势菌主要为韦荣氏球菌属（Veillonella）和梭菌属（Clostridium）以及拟杆菌目（Bacteroidales）和乳杆菌目（Lactobacillales）。(C)2018爱思唯尔有限公司版权所有
In this study, the anaerobic co-digestion of food waste (FW) and sewage sludge (SS) was investigated for the production of hydrogen and volatile fatty acids (VFAs). The results showed that the anaerobic co-digestion of these materials enhanced the hydrogen content by 62.4% (v/v), 29.89% higher than that obtained by FW digestion alone, and the total VFA production reached at 281.84 mg/g volatile solid (VS), a 8.38% increase. This enhancement was primarily resulted from improvements in the multi substrate characteristics, which were obtained by supplying a higher soluble chemical oxygen demand (23.78-32.14 g/L) and suitable a pH (6.12-6.51), decreasing total ammonia nitrogen by 18.67% and ensuring a proper carbon/nitrogen ratio (15.01-23.01). Furthermore, maximal hydrogen (62.39 mL/g VS) and total VFA production potential (294.63 mg/g VS) were estimated using response surface methodology optimization, which yielded FW percentages of 85.17% and 79.87%, respectively. Based on a pyrosequencing analysis, the dominant bacteria associated with VFA and hydrogen production were promoted under optimized condition, including members of genera Veillonella and Clostridium and the orders Bacteroidales and Lactobacillales. (C) 2018 Elsevier Ltd. All rights reserved.