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International Journal of Energy for a Clean Environment
CiteScore™: 0.21 SNIP: 0.224 SJR: 0.151

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.2016012534
pages 189-202

ECOTECHNOLOGY FOR HYDROGEN SULFIDE REMOVAL AND PRODUCTION OF ELEMENTAL SULFUR

Yelizaveta Chernysh
Sumy State University (SSU), 2 Rymsky-Korsakov Str., Sumy, 40007, Ukraine
L. Plyatsuk
Sumy State University (SSU), 2 Rymsky-Korsakov Str., Sumy, 40007, Ukraine
V. Dorda
Sumy State University (SSU), 2 Rymsky-Korsakov Str., Sumy, 40007, Ukraine

ABSTRACT

During anaerobic microbiological degradation under biosulfidogenic conditions, organic helatocomplexes with heavy metals of sewage sludge are destroyed and stable compounds of metal sulfides are formed: iron sulfides (marcasites), nickel, chrome, etc. A biogas is formed that is purified in a biodesulfurization unit. The modification of the biodesulfurization technology was carried out using the acidophilic mode of biofilter process. The enrichment culture of T. Intermedius and T. Ferrooxidans were used in the biodesulfurization system for hydrogen sulfide conversion to elemental sulfur. The biomass is immobilized on support media. There are materials that consist of Lavsan fiber and granular activated carbon. The optimal condition of the process was determined. Phosphogypsum is applied as a mineral source for a nutrient medium in the process of the growth of microorganisms. The variations of the pH 4.0−6.5 of culture media resulted in the changes in the activity of Thiobacillus sp. and hence in the bacterial populations as well as in H2S removal. The biomass is immobilized on the material medium consisting of a Lavsan fiber. The total immobilized biomass is 1.7−3.5·1010 CFU/g. Immobilization of microorganisms on granular activated carbon has shown that the total immobilized biomass at the end of batches is equal to 1.6·109 CFU/g. The technological application of complex biotechnology to produce a fertilizer with removal of hydrogen sulfide from the biogas and with elementary sulfur formation has been developed.