Liu Jianwei, Yue Peng, Zang Nana, Lu Chen, Chen Xinyue
Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044 China.
Department of Environmental Science and Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044 China.
Front Environ Sci Eng. 2021;15(3):48. doi: 10.1007/s11783-021-1421-7. Epub 2021 May 10.
A novel three-stage integrated biofilter (TSIBF) composed of acidophilic bacteria reaction segment (ABRS), fungal reaction segment (FRS) and heterotrophic bacteria reaction segment (HBRS) was constructed for the treatment of odors and volatile organic compounds (VOCs)from municipal solid waste (MSW) comprehensive treatment plants. The performance, counts of predominant microorganisms, and bioaerosol emissions of a full-scale TSIBF system were studied. High and stable removal efficiencies of hydrogen sulfide, ammonia and VOCs could be achieved with the TSIBF system, and the emissions of culturable heterotrophic bacteria, fungi and acidophilic sulfur bacteria were relatively low. The removal efficiencies of different odors and VOCs, emissions of culturable microorganisms, and types of predominant microorganisms were different in the ABRS, FRS and HBRS due to the differences in reaction conditions and mass transfer in each segment. The emissions of bioaerosols from the TSIBF depended on the capture of microorganisms and their volatilization from the packing. The rational segmentation, filling of high-density packings and the accumulation of the predominant functional microorganisms in each segment enhanced the capture effect of the bioaerosols, thus reducing the emissions of microorganisms from the bioreactor.
构建了一种新型的三段式一体化生物滤池（TSIBF），它由嗜酸菌反应段（ABRS）、真菌反应段（FRS）和异养菌反应段（HBRS）组成，用于处理城市生活垃圾（MSW）综合处理厂产生的气味和挥发性有机化合物（VOCs）。研究了全尺寸TSIBF系统的性能、优势微生物数量和生物气溶胶排放情况。TSIBF系统能够实现对硫化氢、氨和VOCs的高效稳定去除，可培养的异养菌、真菌和嗜酸硫细菌的排放量相对较低。由于各段反应条件和传质存在差异，ABRS、FRS和HBRS中不同气味和VOCs的去除效率、可培养微生物的排放量以及优势微生物类型均有所不同。TSIBF生物气溶胶的排放取决于微生物的捕获及其从填料中的挥发。合理的分段、高密度填料的填充以及各段优势功能微生物的积累增强了生物气溶胶的捕获效果，从而减少了生物反应器中微生物的排放。
