Abstract
A sixth-generation down-flow hanging sponge reactor (DHS-G6), using rigid sponge media, was developed as a novel aerobic post-treatment unit for upflow anaerobic sludge blanket (UASB) treating municipal sewage. The rigid sponge media were manufactured by copolymerizing polyurethane with epoxy resin. The UASB and DHS system had a hydraulic retention time (HRT) of 10.6. h (8.6. h for UASB and 2. h for DHS) when operated at 10-28. °C. The system gave reasonable organic and nitrogen removal efficiencies. The final effluent had a total biochemical oxygen demand of only 12. mg/L and a total Kjeldahl nitrogen content of 6. mg/L. The DHS reactor gave particularly good nitrification performance, which was attributed to the new rigid sponge media. The sponge media helped to provide a sufficient HRT, and retained a high biomass concentration, extending the solids retention time. The DHS reactor maintained a high dissolved oxygen concentration under natural ventilation.
| Original language | English |
|---|---|
| Pages (from-to) | 93-100 |
| Number of pages | 8 |
| Journal | Bioresource Technology |
| Volume | 152 |
| DOIs | |
| Publication status | Published - 2014 Jan |
Keywords
- Down-flow hanging sponge
- Packing material
- Sewage treatment
- Upflow anaerobic sludge blanket
- Ventilation
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal
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