Elimination of sulphur odours at landfills by bioconversion and the corona discharge plasma technique
Elimination of sulphur odours at landfills by bioconversion and the corona discharge plasma technique
复制标题
通过生物转化和电晕放电等离子体技术消除垃圾填埋场的硫磺气味
DOI：
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发表时间：
2015
影响因子：
2.8
通讯作者：
Zucheng Wu
中科院分区：
文献类型：
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作者：
F. Xia;Xin Liu;Ying Kang;R. He;Zucheng Wu
硫化氢 (H2S) 在垃圾填埋场产生很大的气味，这对环境和工作人员的健康构成威胁。为了减少其排放，引入了垃圾填埋场覆盖土（LCS）内的生物转化。对垃圾填埋场上方的现场空气和微观测试中的 H2S 排放和浓度进行了调查。结果表明，填埋场H2S排放量和浓度随填埋季节和填埋场址的不同而变化。 H2S浓度与通量在空间和时间上均存在关系。为了表征和评估 LCS 中硫氧化细菌 (SOB) 和硫酸盐还原细菌 (SRB) 的空间和时间多样性，采用了末端限制性片段长度多态性技术。利用dsrB和soxB的功能基因，SOB（包括Halothiobacillus、Rhodothalassium、Parcocccus、Allochromatium和Thiobacillus）和SRB（包括Desulfovibrio、Syntropicobacter、Desulfomonile和Desulfobacca）是相同的，并且在LCS中表现出主导作用。通过采用替代的电晕反应器，硫化物的去除效率超过 90%，这表明 LCS 消除较低浓度的气味是可行的。
Hydrogen sulphide (H2S) contributes a lot to odours at landfills, which is a threat to the environment and the health of the staff therein. To mitigate its emission, the bioconversion within landfill cover soils (LCSs) was introduced. H2S emission and concentration both in the field air above the landfill and in microcosm testing were surveyed. Results indicated that H2S emission and concentration in the landfill varied with landfill seasons and sites. There existed relationship between H2S concentration and fluxes spatially and temporally. To characterize and assess the spatial and temporal diversity of sulphur-oxidizing bacteria (SOB) and sulphate-reducing bacteria (SRB) in the LCSs, the terminal-restriction fragment length polymorphism technique was employed. Using the functional genes of dsrB and soxB, SOB, including Halothiobacillus, Rhodothalassium, Paracocccus, Allochromatium, and Thiobacillus, and SRB, including Desulfovibrio, Syntrophobacter, Desulfomonile and Desulfobacca, were identical and exhibited the dominant role in the LCSs. By employing an alternative available corona reactor, more than 90% removal efficiencies of sulphides were demonstrated, suggesting that the LCSs for eliminating odours in a lower concentration would be feasible.