A novel and cost-effective sewage treatment system consisting of UASB pre-treatment and aerobic post-treatment units for developing countries-Reference-Cited by-同舟云学术

A novel and cost-effective sewage treatment system consisting of UASB pre-treatment and aerobic post-treatment units for developing countries

Published:1997-12-01 Issue:12 Volume:36 Page:189-197
ISSN:0273-1223
Container-title:Water Science and Technology
language:en
Short-container-title:

Author:

Machdar Izarul¹,Harada Hideki¹,Ohashi Akiyoshi¹,Sekiguchi Yuji¹,Okui Hiroyuki²,Ueki Kyoko²

Affiliation:

1. Department Environmental Systems Engineering, Nagaoka University of Technology, Nagaoka 940-21, Japan

2. Civil Engineering Technology Department, Tokyu Construction Co. Ltd, 1-16-14 Shibuya, Tokyo 150, Japan

Abstract

A novel sewage treatment system was proposed, which consists of a UASB anaerobic pre-treatment unit and the following DHS (downflow hanging sponge-cubes) aerobic post-treatment unit, as a low-cost and easy-maintenance process for developing countries. Over six months experiment by feeding sewage our proposed system achieved 94% of total-COD removal, 81% of soluble-COD removal, and nearly perfect SS removal and total-BOD removal at the overall HRT of 8.3 hr (7 hr in UASB and 1.3 hr in DHS unit). Moreover, the DHS reactor was capable of performing high (73–78%) nitrification. Our whole system requires neither external aeration input nor withdrawal of excess sludge.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

Link

http://iwaponline.com/wst/article-pdf/36/12/189/34375/189.pdf

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