Fractional, biodegradable and spectral characteristics of extracted and fractionated sludge extracellular polymeric substances

被引：45
|
作者：
Wei, Liang-Liang [1 ]
Wang, Kun [1 ,2 ]
Zhao, Qing-Liang [1 ,2 ]
Jiang, Jun-Qiu [1 ]
Kong, Xiang-Juan [3 ]
Lee, Duu-Jong [4 ]
机构：
[1] Harbin Inst Technol, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, SKLUWRE, Harbin 150090, Peoples R China
[3] Minist Housing & Urban Rural Dev PR China, Ctr Sci & Technol Construct, Beijing 100835, Peoples R China
[4] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
来源：
WATER RESEARCH | 2012年 / 46卷 / 14期
关键词：
Sludge; Extracellular polymeric substances; Extraction methods; Fractionation; Biodegradable rate; NATURAL ORGANIC-MATTER; POLYCYCLIC AROMATIC-HYDROCARBONS; SOLUBLE MICROBIAL PRODUCTS; ACTIVATED-SLUDGE; CARBON; EPS; DEGRADATION; PRECURSORS; EXCITATION; DYNAMICS;
D O I：
10.1016/j.watres.2012.05.049
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Correlation between fractional, biodegradable and spectral characteristics of sludge extracellular polymeric substances (EPS) by different protocols has not been well established. This work extracted sludge EPS using alkaline extractants (NH4OH and formaldehyde + NaOH) and physical protocols (ultrasonication, heating at 80 degrees C or cation exchange resin (CER)) and then fractionated the extracts using XAD-8/XAD-4 resins. The alkaline extractants yielded more sludge EPS than the physical protocols. However, the physical protocols extracted principally the hydrophilic components which were readily biodegradable by microorganisms. The alkaline extractants dissolved additional humic-like substances from sludge solids which were refractory in nature. Different extraction protocols preferably extracted EPS with distinct fractional, biodegradable and spectral characteristics which could be applied in specific usages. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4387 / 4396
页数：10
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