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Microbial hydrogen sulfide elimination in a continuous biotrickling reactor by immobilized Thiobacillus thioparus

Tóth G., Lövitusz E., Nemestóthy N., Bélafi-Bakó K.

Environment Protection Engineering

2017

Vol. 43, nr 1

19--30

Elimination of hydrogen sulfide from gaseous streams by biological treatments is a promising alternative procedure, among them biotrickling reactor seems a reliable and efficient system. To maximize the performance, strains should have high hydrogen sulfide elimination efficiency; excellent carriers should be selected where the microbes can be immobilized. Various carriers were used as the support medium for the immobilization of Thiobacillus thioparus and a continuous biotrickling reactor was constructed and operated for H2S elimination. It was found that such systems with Mavicell and Kaldnes supports are able to remove H2S from gas mixtures with high efficiency (95–100%), and the elimination capacity was calculated as a high as 30–40 g S/(m3·h).