Effect of steam explosion on physicochemical properties of waste activated sludge and the performance of anaerobic digestion

被引：4

作者：

Zhang, Yan ^{[1
,2
,3
]}

Han, Peng ^{[1
]}

Liu, He ^{[1
,2
,3
]}

Zhang, Lihui ^{[1
]}

Liu, Hongbo ^{[1
,2
,3
]}

Fu, Bo ^{[1
,2
,3
]}

机构：

[1] Jiangnan Univ, Sch Environm & Civil Engn, Wuxi 214122, Peoples R China

[2] Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China

[3] Jiangsu Collaborat Innovat Ctr Water Treatment Te, Suzhou 215011, Peoples R China

来源：

WATER SCIENCE AND TECHNOLOGY | 2018年 / 77卷 / 11期

基金：

中国国家自然科学基金;

关键词：

anaerobic digestion; biogas production; pretreatment; steam explosion; waste activated sludge; EXTRACELLULAR POLYMERIC SUBSTANCES; SEWAGE-SLUDGE; BIOGAS PRODUCTION; MESOPHILIC CONDITIONS; THERMAL HYDROLYSIS; SECONDARY SLUDGE; SOLID-WASTES; PRETREATMENT; BIODEGRADABILITY; SOLUBILIZATION;

D O I：

10.2166/wst.2018.227

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of steam explosion on physicochemical properties of sludge and the performance of anaerobic digestion (AD) was investigated. The steam explosion was conducted under different combinations of temperature and time, ranging 151-198 degrees C and 4-12 min respectively. The capillary suction time (CST) and viscosity of the sludge was increased with particle size decreased by improved hydrolysis temperature and prolonged hydrolysis time. The best sludge solubilization achieved was 41.3% under pretreatment condition of 198 degrees C and 4 min. Biogas production was enhanced with the improved sludge solubilization, and a linear correlation was found between biogas production and the severity factor (logR(0)) of steam explosion. However, the biogas productivity was reduced when the logR(0) was increased from 3.79 to 3.96, probably owing to the generation of refractory organics during the high severity pretreatment. The temperature of 198 degrees C and the time of 8 min were the recommended operation parameters of steam explosion pretreatment for sludge AD, which could improve biogas production by 99.7 mL/g VSfed. The pH and NH4+-N during sludge AD was increased by steam explosion pretreatment; however, no inhibition on biogas production was observed.

引用

页码：2687 / 2698

页数：12

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