Use of gamma-irradiation pretreatment for enhancement of anaerobic digestibility of sewage sludge

作     者：Shoujun YUAN Zheng ZHENG Yanyan MU Xin YU Yongfu ZHAO 

作者机构：School of Civil EngineeringHefei University of TechnologyHefei 230009China State Key Laboratory of Pollution Control and Resource ReuseSchool of the EnvironmentNanjing UniversityNanjing 210093China Zhongan Zhihuan Technology Assessment CenterBeijing 100022China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2008年第2卷第2期

页      面：247-250页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.10075027) 

主　　题：γ-irradiation solid components soluble components anaerobic digestibility 

摘      要：The effects of γ-irradiation pretreatment on anaerobic digestibility of sewage sludge was investigated in this *** like solid components,soluble components,and biogas production of anaerobic digestion experiment for sewage sludge were *** values of these parameters were compared before and after γ-irradiation *** solid(TS),volatile solid(VS),suspended solid(SS),volatile suspended solid(VSS),and average floc size of samples decreased after cirradiation ***,floc size distribution of sewage sludge shifted from 80–100 mm to 0–40 mm after γ-irradiation treatment at the doses from 0 to 30 kGy,which indicated the disintegration of sewage ***,microbe cells of sewage sludge were ruptured by γ-irradiation treatment,which resulted in the release of cytoplasm and increase of soluble chemical oxygen demand(SCOD).Both sludge disintegration and microbe cells rupture enhanced the subsequent anaerobic digestion process,which was demonstrated by the increase of accumulated biogas *** with digesters fed with none irradiated sludge,the accumulated biogas production increased 44,98,and 178 mL for digesters fed sludge irradiated at 2.48,6.51,and 11.24 kGy,*** results indicated that γ-irradiation pretreatment could effectively enhance anaerobic digestibility of sewage sludge,and correspondingly,could accelerate hydrolysis process,shorten sludge retention time of sludge anaerobic digestion process.