Xie Peng, Li Chun-Li, Shao Bo, Xu Xi-Jun, Chen Xu-Dong, Zhao Lei, Zhou Xu, Lee Duu-Jong, Ren Nan-Qi, Chen Chuan
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province, 150090, China.
Engineering Laboratory of Microalgal Bioenergy, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China.
Chemosphere. 2021 Aug;276:130084. doi: 10.1016/j.chemosphere.2021.130084. Epub 2021 Mar 8.
Anthropogenic NO, SO and CO emission from the fossil-fuel-fired power plants has aroused growing attention. This study investigated the removal performance of CO, SO and NO in flue gas as well as conversion efficiency of nitric- and sulfur-compounds in liquid phase in a biofilter. In order to develop the potential of the biofilter, simulative industry wastewater was employed as the spray solution. The satisfactory flue gas removal performance (75.23% CO, 100% SO and 82.81% NO) were achieved under the optimal operating conditions of biofilter: initial solution pH of 9 and liquid-gas ratio (L/G) of 3. The gas film mass transfer coefficients (ka) results showed that the resistance of gas mass transfer was decreased with increasing the pH value and L/G ratio, respectively. The final transformation product of NO was mostly N while about 78% SO was converted to elemental sulfur. The microbial community analysis results showed that the relative abundance of bacteria with denitrification capacity was increased by 3.05% which might have contributed to the conversion of NO intermediates products in present study. Collectively, this biofilter system achieve a better flue gas removal performance via the proper operation system, which provides an economic feasible strategy of flue gas purification and increases potential for industrial application.
化石燃料发电厂产生的人为一氧化氮、二氧化硫和一氧化碳排放引起了越来越多的关注。本研究考察了生物滤塔中烟气中一氧化碳、二氧化硫和一氧化氮的去除性能以及液相中氮化合物和硫化合物的转化效率。为了开发生物滤塔的潜力，采用模拟工业废水作为喷淋溶液。在生物滤塔的最佳运行条件下，即初始溶液pH值为9、液气比（L/G）为3时，实现了令人满意的烟气去除性能（一氧化碳去除率75.23%、二氧化硫去除率100%、一氧化氮去除率82.81%）。气膜传质系数（ka）结果表明，传质阻力分别随着pH值和液气比的增加而降低。一氧化氮的最终转化产物主要是氮气，约78%的二氧化硫转化为元素硫。微生物群落分析结果表明，具有反硝化能力的细菌相对丰度增加了3.05%，这可能有助于本研究中一氧化氮中间产物的转化。总的来说，该生物滤塔系统通过适当的运行系统实现了较好的烟气去除性能，为烟气净化提供了一种经济可行的策略，并增加了工业应用潜力。
