Combination of a UASB reactor and a curtain type DHS (downflow hanging sponge) reactor as a cost-effective sewage treatment system for developing countries

被引：91

作者：

Machdar, I ^{[1
]}

Sekiguchi, Y ^{[1
]}

Sumino, H ^{[1
]}

Ohashi, A ^{[1
]}

Harada, H ^{[1
]}

机构：

[1] Nagaoka Univ Technol, Dept Environm Syst Engn, Nagaoka, Niigata 9402188, Japan

来源：

WATER SCIENCE AND TECHNOLOGY | 2000年 / 42卷 / 3-4期

关键词：

aerobic post-treatment; appropriate technology; developing countries; DHS reactor; sewage treatment; UASB reactor;

D O I：

10.2166/wst.2000.0362

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The second generation of our originally proposed sewage treatment system. which consists of a UASB reactor as an anaerobic pre-treatment unit and curtain-type DHS (downflow hanging sponge) reactor as an aerobic post-treatment unit, was installed at a municipal sewage treatment site. A 550-day continuous experiment demonstrated that the whole combined system successfully achieved 94-97% of unfiltered-BOD removal, 81-84% of unfiltered-GOD removal, and 63-79% of SS removal. at an overall HRT of 8 h (6 h for UASB and 2 h for DHS units). The combined system performed an excellent organic removal as well as a fairly efficient nitrification, i.e. 52-61 % of ammonia-nitrogen removal. Our proposed combined system possesses prominent advantages: requiring neither external aeration input nor excess sludge withdrawal.

引用

页码：83 / 88

页数：6

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