Anaerobic thermophilic digestion of sewage sludge with a thickened sludge recycle
| Autor: | A. M. Agarev, M. V. Kevbrina, A. Ya. Vanyushina, M. N. Kozlov, Yu. A. Nikolaev |
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| Rok vydání: | 2012 |
| Předmět: |
Environmental Engineering
Hot Temperature Time Factors Hydraulic retention time Waste management Sewage Chemistry business.industry Water Dewatering Waste Disposal Fluid Anaerobic digestion Bacteria Anaerobic Bioreactors Wastewater Biogas Facility Design and Construction Sewage sludge treatment Anaerobiosis business Methane Sludge Water Science and Technology |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 65(3) |
| ISSN: | 0273-1223 |
| Popis: | The process of anaerobic thermophilic digestion of municipal wastewater sludge with a recycled part of thickened digested sludge, was studied in semi-continuous laboratory digesters. This modified recycling process resulted in increased solids retention time (SRT) with the same hydraulic retention time (HRT) as compared with traditional digestion without recycling. Increased SRT without increasing of HRT resulted in the enhancement of volatile substance reduction by up to 68% in the reactor with the recycling process compared with 34% in a control conventional reactor. Biogas production was intensified from 0.3 L/g of influent volatile solids (VS) in the control reactor up to 0.35 L/g VS. In addition, the recycling process improved the dewatering properties of digested sludge. |
| Databáze: | OpenAIRE |
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