Simultaneous biological removal of sulphide and nitrate by autotrophic denitrification in an activated sludge system

The feasibility of an autotrophic denitrification process in an activated sludge reactor, using sulphide as the electron donor, was tested for simultaneous denitrification and sulphide removal. The reactor was operated at nitrate (N) to sulphide (S) ratios between 0.5 and 0.9 to evaluate their effec...

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Veröffentlicht in:Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 53(2006), 12 vom: 24., Seite 91-9
1. Verfasser: Manconi, I (VerfasserIn)
Weitere Verfasser: Carucci, A, Lens, P, Rossetti, S
Format: Aufsatz
Sprache:English
Veröffentlicht: 2006
Zugriff auf das übergeordnete Werk:Water science and technology : a journal of the International Association on Water Pollution Research
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Nitrates Sewage Sulfides Water Pollutants, Chemical
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245 1 0 |a Simultaneous biological removal of sulphide and nitrate by autotrophic denitrification in an activated sludge system 
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520 |a The feasibility of an autotrophic denitrification process in an activated sludge reactor, using sulphide as the electron donor, was tested for simultaneous denitrification and sulphide removal. The reactor was operated at nitrate (N) to sulphide (S) ratios between 0.5 and 0.9 to evaluate their effect on the N-removal efficiency, the S-removal efficiency and the product formation during anoxic oxidation of sulphide. One hundred per cent removal of both nitrate and sulphide was achieved at a NLR of 7.96 mmol N-L(-1) x d(-1) (111.44 mg NO3- -N x L(-1) x d(-1)) and at a N/S ratio of 0.89 with complete oxidation of sulphide to sulphate. The oxygen level in the reactor (10%) was found to influence the N-removal efficiency by inhibiting the denitrification process. Moreover, chemical (or biological) oxidation of sulphide with oxygen occurred, resulting in a loss of the electron donor. FISH analysis was carried out to study the microbial population in the system 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 7 |a Nitrates  |2 NLM 
650 7 |a Sewage  |2 NLM 
650 7 |a Sulfides  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
700 1 |a Carucci, A  |e verfasserin  |4 aut 
700 1 |a Lens, P  |e verfasserin  |4 aut 
700 1 |a Rossetti, S  |e verfasserin  |4 aut 
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