Immobilization of activated sludge using improved polyvinyl alcohol (PVA) gel

被引：116
|
作者：
Zhang Li-Sheng
Wu Wei-Zhong
Wang Jian-Long [1 ]
机构：
[1] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
[2] Beijing Univ, Coll Environm Sci, Beijing 100871, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2007年 / 19卷 / 11期
基金：
中国国家自然科学基金;
关键词：
immobilization; biological activity; oxygen uptake rate (OUR); polyvinyl alcohol (PVA);
D O I：
10.1016/S1001-0742(07)60211-3
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The microbial immobilization method using polyvinyl alcohol (PVA) gel as an immobilizing material was improved and used for entrapment of activated sludge. The oxygen uptake rate (OUR) was used to characterize the biological activity of immobilized activated sludge. Three kinds of PVA-immobilized particles of activated sludge, that is, PVA-boric acid beads, PVA-sodium nitrate beads and PVA-orthophosphate beads were prepared, and their biological activity was compared by measuring the OUR value. The bioactivity of both autotrophic and heterotrophic microorganisms of activated sludge was determined using different synthetic wastewater media (containing 250 mg/L COD and 25 mg/L NH4(+)-N). The experimental results showed that the bioactivity and stability of the three kinds of immobilized activated sludge was greatly improved after activation. With respect of the bioactivity and the mechanical stability, the PVA-orthophosphate method may be a promising and economical technique for microbial immobilization.
引用
收藏
页码：1293 / 1297
页数：5
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