Biological sulfide oxidation in an airlift bioreactor

Bioresource Technology
Jenyuk Lohwacharin, Ajit P Annachhatre

Abstract

Biological sulfide oxidation process was investigated in an airlift reactor under oxygen-limited condition (0.2-1.0 mg l(-1)). Reactor start-up was accomplished using seed sludge from activated sludge process treating domestic wastewater. Synthetic wastewater was used as feed. Gradual increase in volumetric sulfide loading rate resulted in increase of elemental sulfur production. At sulfide loading rate of 2.2 kg S m(-3)d(-1), 50% of influent sulfide was converted to elemental sulfur. At maximum volumetric sulfide loading rate of 4.0 kg S m(-3)d(-1), sulfide consumption of 4.3 kg S kg VSS(-1)d(-1) was achieved, and over 93% of sulfide removal was observed. Investigation revealed that up to 90% of sulfide removed was converted to elemental sulfur. Addition of polyaluminium chloride as coagulant was found to be effective for sulfur-particle aggregation.

Citations

Jun 8, 2014·Bioresource Technology·I RamosM Fdz-Polanco
Aug 26, 2014·TheScientificWorldJournal·Mohamed Abdel-Monaem ZytoonFadia Ahmed El-Marakby
Feb 16, 2011·Journal of Hazardous Materials·Ozan K BekmezciErkan Sahinkaya
Mar 5, 2015·Environmental Technology·Graziella Patrício Pereira GarciaJuliana Calabria de Araujo
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Jan 25, 2020·International Journal of Environmental Research and Public Health·Jeong-Hee KangHoun Wook Ji
Nov 6, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·L S AzevedoC A L Chernicharo

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