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Experimental Study of Two-stage Biological Desulfurization Process for the Removal of H2S in Biogas
Received date: 2015-03-13
Revised date: 2015-03-26
Online published: 2015-04-29
This paper adopted two-stage biological desulfurization process, using heterotrophic bacteria Pseudomonas putida DS1 as desulfurization strain, studied the effects of sulfide load, dissolved oxygen, gas-liquid volume ratio, pH value on sulfide removal. The results show that: DO affect the sulfide removal efficiency of Pseudomonas putida DS1. When sulfide loading rate is 40 g•m−3•h−1 and DO is 1.5 mg•L−1, the removal rate of S2− is above 90.6%. The sulfide load and DO show a linear relationship that the DO increases with the sulfide load increasing. The sulfide removal rate decreases with the increasing of sulfide load .When the sulfide load is less than 80 g•m−3•h−1, the sulfide removal rate is above 90%. When the sulfide load is more than 80 g•m−3•h−1, the sulfide removal rate is below 90%. When the inlet H2S concentration is 3 000 ± 10 ppm and the gas-liquid ratio is 15:1, the H2S removal rate is 93.6%. When the pH of circulating fluid is 8.0, the H2S absorption rate of the scrubber is 94.0%. S2− removal rate obtained from Pseudomonas putida DS1 can reach 96.9%. The main conversion product of sulfide is elemental sulfur.
Key words： Pseudomonas putida DS1; two-stage; biogas; bio-desulfurization
ZHOU Xian-you , XU Ying , SUN Yong-ming , KONG Xiao-ying , YUAN Zhen-hong , XING Tao , NIU Hong-zhi . Experimental Study of Two-stage Biological Desulfurization Process for the Removal of H2S in Biogas[J]. Advances in New and Renewable Energy, 2015 , 3(2) : 105 -110 . DOI: 10.3969/j.issn.2095-560X.2015.02.005
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