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Higher solubility at alkaline conditions is very significant for an efficient treatment process of gaseous H 2 S (g) by reducing the gas–liquid transfer limitations. Nevertheless, the alkaline biodegradation process of H 2 S can be limited when sulfide concentrations are inhibitory. At alkaline conditions (pH > 9), the abiotic chemical sulfide oxidation can(More)
Hydrogen sulfide (H2S) is a very common odor nuisance which is best controlled by chemical or biological scrubbing. Under alkaline pH, the amount of H2S that can be solubilized in a scrubbing liquid increases significantly, and therefore, gas-liquid mass transfer limitations can be reduced. To date, biological scrubbing of H2S has been limited to neutral or(More)
BACKGROUND: An alkaline mineral medium (pH ≈10) was used in a previous study to enhance the absorption rate of hydrogen sulfide in a biofiltration process where an alkaliphilic sulfo-oxidizing bacterial consortium was deployed. In this work the same mineral media and bacterial consortium were used to assess a biotrickling filter performance during the(More)
The ability of sulfate-reducing bacteria to produce hydrogen sulfide and the high affinity of sulfide to react with divalent metallic cations represent an excellent option to remove heavy metals from wastewater. Different parameters have been proposed to control the hydrogen sulfide production by anaerobic bacteria, such as the organic and sulfate loading(More)
A novel lab-scale tubular closed photobioreactor was developed and used for the assessment of the photosynthetic activity of an alkaliphilic microalgae mixed consortium under non-substrate limitation (i.e., bicarbonate excess), controlled irradiance, and mixing conditions. Two prominent haloalkaliphilic strains were identified as members of the consortium:(More)
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