A NOVEL AND COST-EFFECTIVE SEWAGE-TREATMENT SYSTEM CONSISTING OF UASBPRETREATMENT AND AEROBIC POSTTREATMENT UNITS FOR DEVELOPING-COUNTRIES

Authors
MACHDAR I HARADA H OHASHI A SEKIGUCHI Y OKUI H UEKI K
Citation
I. Machdar et al., A NOVEL AND COST-EFFECTIVE SEWAGE-TREATMENT SYSTEM CONSISTING OF UASBPRETREATMENT AND AEROBIC POSTTREATMENT UNITS FOR DEVELOPING-COUNTRIES, Water science and technology, 36(12), 1997, pp. 189-197
Citations number
8
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Journal title
Water science and technology → ACNP
ISSN journal
02731223
Volume
36
Issue
12
Year of publication
1997
Pages
189 - 197
Database
ISI
SICI code
0273-1223(1997)36:12<189:ANACSS>2.0.ZU;2-B
Abstract
A novel sewage treatment system was proposed, which consists of a UASB anaerobic pretreatment unit and the following DHS (downflow hanging s ponge-cubes) aerobic posttreatment unit, as a low-cost and easy-mainte nance process for developing countries. Over six months experiment by feeding sewage our proposed system achieved 94% of total-GOD removal, 81% of soluble-GOD removal, and nearly perfect SS removal and total-BO D 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 (73-7 8%) nitrification. Our whole system requires neither external aeration input nor withdrawal of excess sludge. (C) 1997 IAWQ.