Biological hydrolysis pretreatment on secondary sludge: Enhancement of anaerobic digestion and mechanism study

被引：77
作者：
Ding, Huihuang H. [1 ]
Chang, Sheng [1 ]
Liu, Yi [1 ]
机构：
[1] Univ Guelph, Sch Engn, Guelph, ON N1G 2W1, Canada
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 244卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Biological hydrolysis; Anaerobic digestion; Sludge pretreatment; Biochemical methane potential; Extracellular polymeric substance; WASTE ACTIVATED-SLUDGE; EXTRACELLULAR POLYMERIC SUBSTANCES; THERMAL HYDROLYSIS; BIOGAS PRODUCTION; SOLID-WASTES; PERSPECTIVES; INTEGRATION; ENERGY;
D O I：
10.1016/j.biortech.2017.08.064
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The performance of biological hydrolysis (BH) pretreatment on municipal secondary sludge was evaluated in this study. During 6-day BH at 42 degrees C (BH42), soluble chemical oxygen demand (sCOD) increased from 175.2 +/- 38.2 mg/L to 3314.5 +/- 683.4 mg/L; the dominant volatile fatty acid (VFA) was acetic acid, and its concentration increased from 41.5 +/- 2.1 mg/L to 786.0 +/- 133.2 mg/L. The extracted extracellular polymeric substances (EPS) from untreated secondary sludge contained three main fractions, and Fraction I gradually decreased from 133.9 kDa to 24.9 kDa during 6-day BH42. The BH pre-treatment at 42 degrees C and 55 degrees C both achieved more than 4-log reduction of total coliforms and 3-log reduction of E. coli. The BH pretreated secondary sludge at 15-day biochemical methane potential (BMP) test was comparable with the untreated secondary sludge after 30-day BMP, showing a significant enhancement on the acceleration of biogas production by BH pre-treatment.
引用
收藏
页码：989 / 995
页数：7
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