Abstract
A novel sewage treatment system was proposed, which consists of a UASB anaerobic pretreatment 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.
| Original language | English |
|---|---|
| Pages (from-to) | 189-197 |
| Number of pages | 9 |
| Journal | Water Science and Technology |
| Volume | 36 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1997 Dec 1 |
| Event | Proceedings of the 1997 6th IAWQ Asia-Pacific Regional Conference, Asian Waterqual'97 - Seoul, South Korea Duration: 1997 May 20 → 1997 May 23 |
Keywords
- Aerobic post-treatment
- Anaerobic treatment
- Appropriate technology
- DHS reactor
- Developing countries
- Nitrification
- Sewage treatment
- UASB reactor
ASJC Scopus subject areas
- Environmental Engineering
- Water Science and Technology