Structural and functional properties of organic matters in extracellular polymeric substances (EPS) and dissolved organic matters (DOM) after heat pretreatment with waste sludge

被引：96
作者：
Sun, Jian [1 ]
Guo, Liang [1 ,2 ]
Li, Qianqian [1 ]
Zhao, Yangguo [1 ]
Gao, Mengchun [1 ]
She, Zonglian [1 ]
Wang, Guangce [3 ]
机构：
[1] Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Minist Educ, Key Lab Marine Environm & Ecol, Qingdao 266100, Peoples R China
[3] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 219卷
关键词：
Waste sludge; Heat hydrolysis; Dissolved organic matters (DOM); Extracellular polymeric substances (EPS); Excitation-emission matrix (EEM); MATRIX FLUORESCENCE SPECTROSCOPY; REGIONAL-INTEGRATION ANALYSIS; ANAEROBIC-DIGESTION PROCESS; EXCITATION-EMISSION MATRIX; ACTIVATED-SLUDGE; THERMAL PRETREATMENT; 3-DIMENSIONAL EXCITATION; SOLUBILIZATION; TEMPERATURE; HYDROLYSIS;
D O I：
10.1016/j.biortech.2016.08.042
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The effects of heat pretreatment on waste sludge hydrolysis were investigated in this study. Heat pretreatment was conducted at 65 degrees C, 80 degrees C, 100 degrees C and 121 degrees C for 5 min, 10 min, 15 min, 20 min, 25 min and 30 min. Not only analyzed the changes of SCOD (Soluble chemical oxygen demand), carbohydrate and protein, but also evaluated the structural and functional properties of organics in extracellular polymeric substances (EPS) and dissolved organic matters (DOM) by using three-dimensional excitationemission matrix (3D-EEM) fluorescence spectroscopy with fluorescence regional integration (FRI) analysis. The SCOD in DOM increased with pretreated temperatures. The optimal heat hydrolysis temperature and time were selected by further studying the biodegradable and non-biodegradable components. After treated at 80 degrees C for 25 min, the fluorescence intensity and percent fluorescence response (P-i,P- n) of easily biodegradable soluble microbial by-product substance were higher than others, and little nonbiodegradable fulvic acid-like substance was accumulated. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：614 / 623
页数：10
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