Enhanced volatile fatty acid production from anaerobic fermentation of waste activated sludge by combined sodium citrate and heat pretreatment

被引：26
作者：
Fang, Wei [1 ,2 ]
Yang, Yiming [3 ]
Wang, Chen [4 ]
Zhang, Panyue [1 ,2 ]
机构：
[1] Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab for Source Control Technol Water P, Beijing 100083, Peoples R China
[2] Beijing Forestry Univ, Coll Environm Sci & Engn, Engn Res Ctr f Water Pollut Source Control & Ecore, Beijing 100083, Peoples R China
[3] China Univ Geosci Beijing, Sch Energy Resources, 29 Xueyuan Rd, Beijing 100083, Peoples R China
[4] Ministry Ecol & Environm, Techn Ctr Soil,Agr & Rural Ecology & Environm, Beijing 100176, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2022年 / 10卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Waste activated sludge; Volatile fatty acids; Sodium citrate; Heat pretreatment; Microbial community; THERMAL PRETREATMENT; MICROWAVE IRRADIATION; SEWAGE-SLUDGE; FOOD WASTE; DIGESTION; ALKALINE; SOLUBILIZATION; DISINTEGRATION; OPTIMIZATION; HYDROLYSIS;
D O I：
10.1016/j.jece.2022.108518
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study the combination pretreatment of sodium citrate (SC) and heating was investigated to enhance the volatile fatty acid (VFA) production during anaerobic fermentation of waste activated sludge (WAS). The results showed that the combined pretreatment (0.3 g-SC/g-TSS + at 121 degrees C for 30 min) resulted to the maximum VFA yield of 354.5 mg-COD/g-VS, which was 16.4, 6.0 and 2.0-fold of that of control, with sole SC and sole heat pretreatment, respectively. Meanwhile, the combined pretreatment greatly improved the proportion of acetate and butyrate, while the production of propionate significantly decreased. Mechanism analysis indicated that the combined pretreatment effectively promoted WAS disintegration and solubilization. Moreover, the heat pre-treatment exhibited superior performances to the SC pretreatment on release of organic matters and enhance-ment of VFA production in the combined pretreatment. The microbial analysis revealed that with the combined pretreatment the microbial community shifted toward hydrolysis-acidification, such as Enterobacter and Macellibacteroides.
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页数：7
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