Removal of Reduced Species from the Effluent of UASB Reactor Treating Domestic Wastewater

A. A. Khan; R. Z. Gaur; I. Mehrotra; A. A. Kazmi; B. Lew

doi:10.1061/(ASCE)EE.1943-7870.0001129

Removal of Reduced Species from the Effluent of UASB Reactor Treating Domestic Wastewater

A. A. Khan, R. Z. Gaur, I. Mehrotra, A. A. Kazmi, B. Lew

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

This paper deals with an upflow anaerobic sludge blanket (UASB) reactor's effluent post treatment under aerobic conditions. The kinetics of stripping and oxidation of sulfides (H2S, HS- and S2-) and purgeable organic compounds are determined. The effects of dissolved oxygen (DO) and temperature on stripping and oxidation kinetics are also investigated. Batch results indicate that the effluent quality [sulfide, chemical oxygen demand (COD) and purgeable organic carbon (POC)] can be improved by 50% with aeration at 6 mg/L DO and at hydraulic retention time (HRT) of 30 min. The results obtained in the batch studies were confirmed in full size reactors. Moreover, it was observed that sulfides in absence of dissolved oxygen are removed by stripping rather than oxidation.

Original language	English
Article number	4016060
Journal	Journal of Environmental Engineering (United States)
Volume	142
Issue number	11
DOIs	https://doi.org/10.1061/(ASCE)EE.1943-7870.0001129
State	Published - 1 Nov 2016
Externally published	Yes

Keywords

Aeration
Nitrogen purging
Removal rate (k)
Synthetic stock sulfide solutions
Upflow anaerobic sludge blanket(UASB) effluents

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10.1061/(ASCE)EE.1943-7870.0001129

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title = "Removal of Reduced Species from the Effluent of UASB Reactor Treating Domestic Wastewater",

abstract = "This paper deals with an upflow anaerobic sludge blanket (UASB) reactor's effluent post treatment under aerobic conditions. The kinetics of stripping and oxidation of sulfides (H2S, HS- and S2-) and purgeable organic compounds are determined. The effects of dissolved oxygen (DO) and temperature on stripping and oxidation kinetics are also investigated. Batch results indicate that the effluent quality [sulfide, chemical oxygen demand (COD) and purgeable organic carbon (POC)] can be improved by 50% with aeration at 6 mg/L DO and at hydraulic retention time (HRT) of 30 min. The results obtained in the batch studies were confirmed in full size reactors. Moreover, it was observed that sulfides in absence of dissolved oxygen are removed by stripping rather than oxidation.",

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AU - Khan, A. A.

AU - Gaur, R. Z.

AU - Mehrotra, I.

AU - Kazmi, A. A.

AU - Lew, B.

PY - 2016/11/1

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AB - This paper deals with an upflow anaerobic sludge blanket (UASB) reactor's effluent post treatment under aerobic conditions. The kinetics of stripping and oxidation of sulfides (H2S, HS- and S2-) and purgeable organic compounds are determined. The effects of dissolved oxygen (DO) and temperature on stripping and oxidation kinetics are also investigated. Batch results indicate that the effluent quality [sulfide, chemical oxygen demand (COD) and purgeable organic carbon (POC)] can be improved by 50% with aeration at 6 mg/L DO and at hydraulic retention time (HRT) of 30 min. The results obtained in the batch studies were confirmed in full size reactors. Moreover, it was observed that sulfides in absence of dissolved oxygen are removed by stripping rather than oxidation.

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Removal of Reduced Species from the Effluent of UASB Reactor Treating Domestic Wastewater

Abstract

Keywords

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