两段式生物脱硫工艺对沼气中H2S去除效果的实验研究
收稿日期: 2015-03-13
修回日期: 2015-03-26
网络出版日期: 2015-04-29
基金资助
国家高技术研究发展计划（863计划）（2012AA101802）；
中国科学院重点部署项目（KGZD-EW-304-1）
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
本研究采用两段式生物脱硫工艺，以异养脱硫菌Pseudomonas putida DS1（假单胞菌属）为菌株，研究了硫化物负荷、溶解氧（DO）、气液体积比、pH值等工艺参数对硫化物脱除效果的影响。实验结果表明：DO影响Pseudomonas putida DS1对硫化物的去除率，当硫化物负荷为40 g•m−3•h−1、DO为1.5 mg•L−1时，S2− 去除率达90.6%以上；硫化物负荷与DO呈线性关系，随着硫化物负荷增加，DO逐渐增大；硫化物去除率随硫化物负荷的增加而降低，当硫化物负荷小于80 g•m−3•h−1时，硫化物去除率大于90%；当硫化物负荷大于80 g•m−3•h−1，硫化物去除率低于90%；当沼气中H2S浓度为3 000 ± 10 ppm、气液比为15∶1时，H2S去除率达93.6%；循环液pH值为8.0时，沼气中H2S的去除率达94.0%，Pseudomonas putida DS1对S2− 去除率达96.9%，硫化物的转化产物主要为单质S0。
关键词： Pseudomonas putida DS1菌株; 两段式; 沼气; 生物脱硫
周贤友 , 徐 瑛 , 孙永明 , 孔晓英 , 袁振宏 , 邢 涛 , 牛红志 . 两段式生物脱硫工艺对沼气中H2S去除效果的实验研究[J]. 新能源进展, 2015 , 3(2) : 105 -110 . DOI: 10.3969/j.issn.2095-560X.2015.02.005
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
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