Effects of temperature and hydraulic retention time on anaerobic sequencing batch reactor treatment of low-strength wastewater
| Autor: | Richard R. Dague, Udeme J Ndon |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
High energy
Environmental Engineering Chromatography Hydraulic retention time Chemistry Ecological Modeling Substrate (chemistry) Sequencing batch reactor Pollution Wastewater Bioreactor Waste Management and Disposal Retention time Anaerobic exercise Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Water Research. 31:2455-2466 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/s0043-1354(97)00105-x |
| Popis: | Four laboratory-scale anaerobic sequencing batch reactors (ASBRs) were used to treat synthetic wastewaters at COD concentrations of 1000, 800, 600 and 400 mg/liter (BOD5 of 490, 392, 294 and 196 mg/liter respectively). The ASBRs were operated at temperatures of 35, 25, 20 and 15°C. Reactor 1 was operated at a 48-h HRT, reactor 2 at 24-h HRT, reactor 3 at 16-h HRT and reactor 4 at a 12-h HRT. The four substrate concentrations were treated in each reactor and each temperature. Results of the study show 80–90% soluble COD removal efficiency at the various substrate concentrations, temperatures and HRTs, except during 15°C treatment of the more concentrated wastewater at the shorter HRTs. These findings show that the ASBR process could be used for the treatment of low-strength wastewaters at low temperatures, usually treated aerobically with high energy expenditures and large amounts of sludge production. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect