Simultaneous removal of ammonium-nitrogen and sulphate from wastewaters with an anaerobic attached-growth bioreactor

Some industrial wastewaters may contain ammonium-nitrogen and/or sulphate, which need to be removed before their discharge into natural water bodies to eliminate their severe pollution. In this paper, simultaneous removal of ammonium-nitrogen and sulphate with an anaerobic attached-growth bioreactor...

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Bibliographic Details
Published in:Water science and technology 2006-01, Vol.54 (8), p.27-35
Main Authors: Zhao, Q I, Li, W, You, S J
Format: Article
Language:English
Subjects:
Ammonium
Anaerobiosis
Bacteria
Biogas
Bioreactors
Carbon - metabolism
Carbon sources
Chlorine
Industrial Waste
Industrial wastewater
Nitrogen
Nitrogen - isolation & purification
Quaternary Ammonium Compounds - chemistry
Quaternary Ammonium Compounds - isolation & purification
Sodium sulfate
Sulfate reduction
Sulfates
Sulfates - chemistry
Sulfates - isolation & purification
Sulfur - chemistry
Sulfur-Reducing Bacteria - metabolism
Wastewater treatment
Water pollution
Water Purification - instrumentation
Water Purification - methods
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Summary:Some industrial wastewaters may contain ammonium-nitrogen and/or sulphate, which need to be removed before their discharge into natural water bodies to eliminate their severe pollution. In this paper, simultaneous removal of ammonium-nitrogen and sulphate with an anaerobic attached-growth bioreactor of 3.8 L incubated with sulphate reducing bacteria (SRB) was investigated. Artificial wastewater containing sodium sulphate as electron acceptor, ammonium chlorine as electron donor and glucose as carbon source for bacteria growth was used as the feed for the bioreactor. The loading rates of ammonium-nitrogen, sulphate and COD were 2.08 gN/m3 x d, 2.38 gS/m3 x d, 104.17 gCOD/m3 x d, respectively, with a N/S ratio of 1:1.14. The results demonstrated that removal rates of ammonium-nitrogen, sulphate and COD could reach 43.35%, 58.74% and 91.34%, respectively. Meanwhile, sulphur production was observed in effluent as well as molecular nitrogen in biogas, whose amounts increased with time substantially, suggesting the occurrence of simultaneous removal of ammonium-nitrogen and sulphate. This novel reaction provided the possibility to eliminate ammonium-nitrogen and sulphate simultaneously with accomplishment of COD removal from wastewater, making wastewater treatment more economical and sustainable.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2006.762