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- Title
Biological sulphate reduction with primary sewage sludge in an upflow anaerobic sludge bed (UASB) reactor - Part 1: Feasibility study.
- Authors
Poinapen, J.; Wentzel, M. C.; Ekama, G. A.
- Abstract
This paper describes a novel system for the biological sulphate reduction (BSR) of acid mine drainage (AMD) using primary sewage sludge (PSS) as carbon source in an upflow unaerobic sludge bed (UASB) reactor configurution. A UASB reactor was operated at a temperature of 35°C and it received PSS (1 875 mgCOD/ℓ) augmented with sulphate (1 500 mgSO42-/ℓ). The experimental results indicate that high treatment efficiency was achieved at more than 90% sulphate reduction at a liquid hydraulic retention time (HRT) of 13.5 h. In this study, the effects of various operational parameters were also investigated. The effect of a biomass recycle stream from the top to the bottom of the sludge bed was found to initiate rapid BSR from the bottom of the bed. Profile tests showed that effective and immediate sulphate redaction was achieved as soon as the influent entered the reactor. From these results, it can be concluded that the UASB configuration using PSS as energy source would boa viable method for the BSR of AMD.
- Subjects
SEWAGE sludge; FEASIBILITY studies; SLUDGE management; ACID mine drainage; WASTEWATER treatment; BIOMASS; SULFURIC acid; CHEMICAL processes; WASTE management
- Publication
Water SA, 2009, Vol 35, Issue 5, p525
- ISSN
0378-4738
- Publication type
Article
- DOI
10.4314/wsa.v35i5.49178