Low temperature pre-treatment of domestic sewage in anaerobic hybrid and anaerobic filter reactor
| Autor: | T.A. Elmitwalli, V.I. Sklyar, Grietje Zeeman, Gatze Lettinga |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
anaerobic digestion
Environmental Engineering Time Factors Hydraulic retention time Methanogenesis Polyurethanes voorbehandeling Industrial Waste Bioengineering anaërobe afbraak temperatuur Hybrid reactor Life Science sewage Anaerobiosis Waste Management and Disposal WIMEK Waste management afvalwaterbehandeling Renewable Energy Sustainability and the Environment Chemistry Hydrolysis Chemical oxygen demand households temperature General Medicine pretreatment Pulp and paper industry huishoudens Refuse Disposal Oxygen Anaerobic digestion waste water treatment Biofilter rioolwater Anaerobic filter Environmental Technology Sewage treatment Milieutechnologie Methane Biotechnology |
| Zdroj: | Program and Proceedings : Conference on Biofilm Systems, New York, 1999.-[S.l.] : IAWQ, 1999 Bioresource Technology, 82, 233-239 Bioresource Technology 82 (2002) |
| ISSN: | 0960-8524 |
| Popis: | The pre-treatment of domestic sewage for removal of suspended solids (SS) at a process temperature of 13 degrees C and an hydraulic retention time (HRT) of 4 h was investigated in an anaerobic filter (AF) and anaerobic hybrid (AH) reactor. The AF and the top of the AH reactor consisted of vertical sheets of reticulated polyurethane foam (RPF) with knobs. All biomass in the AF was only in attached form to avoid clogging and sludge washout. The AF reactor showed a significantly higher removal of total and suspended chemical oxygen demand (COD) than the AH reactor, respectively, 55% and 82% in the AF reactor and 34% and 53% in the AH reactor. Because the reactors were operated at a short HRT and low temperature, the hydrolysis, acidification and methanogenesis based on the influent COD were limited to, respectively, 12%, 21% and 23% for the AF reactor and 12%, 17% and 16% for the AH reactor. The excess sludge from the AH reactor was more stabilised and had a better settling capacity and dewaterability. However, the excess sludge from both the AH and AF reactors needed stabilisation. Therefore, the AF reactor is recommended for the pretreatment of domestic sewage at low temperatures. |
| Databáze: | OpenAIRE |
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