Evaluation of anaerobic digestion of food waste and waste activated sludge: Soluble COD versus its chemical composition

被引：90
作者：
Ma, Yingqun [1 ]
Gu, Jun [1 ]
Liu, Yu [1 ,2 ]
机构：
[1] Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Adv Environm Biotechnol Ctr, 1 Cleantech Loop, Singapore 637141, Singapore
[2] Nanyang Technol Univ, Sch Civil & Environm Engn, 50 Nanyang Ave, Singapore 639798, Singapore
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2018年 / 643卷
关键词：
Anaerobic digestion; Soluble COD; Food waste; Waste activated sludge; Fungal mash; DISSOLVED ORGANIC-MATTER; MUNICIPAL SOLID-WASTE; THERMAL HYDROLYSIS PRETREATMENT; SEWAGE-SLUDGE; FLUORESCENCE SPECTROSCOPY; ULTRASONIC PRETREATMENT; ENZYMATIC PRETREATMENT; MICROBIAL COMMUNITIES; REGIONAL-INTEGRATION; BIOGAS PRODUCTION;
D O I：
10.1016/j.scitotenv.2018.06.187
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The hydrolysis as an essential step in anaerobic digestion has been commonly evaluated according to the extent of soluble chemical oxygen demand (SCOD) released from biosolids. However, little information is currently available for the effect of chemical compositions of SCOD on anaerobic digestion. This study showed that the non-biodegradable, recalcitrant organics in SCOD released from food waste and waste activated sludge pretreated with fungal mash rich in various enzymes were accumulated with the prolonged hydrolysis, while the methane production was closely related to the chemical compositions of the feed. The analyses by excitation emission matrix and size exclusion chromatography-organic carbon detection-organic nitrogen detection clearly revealed that the biodegradability of SCOD and the performance of anaerobic digestion were both determined by the chemical compositions of SCOD. These in turn challenged the present practice with SCOD concentration as a sole indicator in the selection and optimization of the pretreatment methods of biosolids prior to anaerobic digestion. It is expected that this study can offer useful insights into future design, optimization and operation of anaerobic digestion system in consideration of both SCOD concentration and its chemical compositions. (C) 2018 Elsevier B.V. All rights reserved.
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收藏
页码：21 / 27
页数：7
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