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- Title
Full-scale application of a down-flow hanging sponge reactor combined with a primary sedimentation basin for domestic sewage treatment.
- Authors
Okubo, Tsutomu; Tagawa, Tadashi; Takahashi, Masanobu; Iguchi, Akinori; Oshiki, Mamoru; Araki, Nobuo; Kubota, Kengo; Tawfik, Ahmed; Uemura, Shigeki; Harada, Hideki
- Abstract
The down-flow hanging sponge (DHS) reactor is advantageous for sewage treatment since it produces an effluent quality that complies with the standards for reuse and there is little excess sludge. A full-scale DHS module was efficiently employed for the treatment of domestic sewage (200 m3 day−1) flowing from a primary sedimentation basin (PSB), which was used to reduce the suspended solids loading rate and enhance the oxidation of organics by heterotrophs. The combined PSB-DHS was successfully operated at a total hydraulic retention time of 3.4 h (2.4 h for PSB and 1.0 h for DHS) for the relatively long period of 600 days at sewage temperatures of 10 °C to 32 °C. The PSB-DHS consistently produced an effluent quality with minimum values of chemical oxygen demand, biochemical oxygen demand, and suspended solids of 59 ± 15, 12 ± 3.0, and 15 ± 7 mg L−1, respectively. The proposed system performed exceptionally well at removing organics and particulate matter over a short hydraulic retention time.
- Subjects
SETTLING basins; SEWAGE; BIOCHEMICAL oxygen demand; EFFLUENT quality; SUSPENDED solids; SEWAGE purification
- Publication
Bioprocess & Biosystems Engineering, 2022, Vol 45, Issue 4, p701
- ISSN
1615-7591
- Publication type
Article
- DOI
10.1007/s00449-022-02689-w