Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China.
Beijing Municipal Research Institute of Environmental Protection, Beijing, 100037, China.
Environ Sci Pollut Res Int. 2019 Feb;26(4):3762-3770. doi: 10.1007/s11356-018-3795-z. Epub 2018 Dec 11.
A study was conducted to investigate the utilization of mature compost as a biofilter medium for the removal of hydrogen sulfide (HS) from the exhaust gases of the composting process. Source-selected kitchen waste from municipal solid waste was composted in a reactor, and the exhaust gas was passed through a biofilter packed with a 1:4 (wet weight) mixture of mature compost and sand. Two treatments were applied under sterilized and unsterilized conditions to quantify the contribution of microbial activity. The effect of packing depth on HS removal efficiency was also studied. A global HS removal efficiency of 51% was obtained in the biofilter for loading rates in the range of 0-429 mg HS m h. The adsorption capacity was the main factor affecting HS removal efficiency, contributing 64.2% to the total removal efficiency, with microbial activity contributing 35.8%. The relationship between the cumulative amount of HS removed and the packing height was well-described by a linear equation. The equation indicated that 99% HS removal efficiency could be achieved using a packing height of 96 cm for unsterilized packing material or 158 cm for sterilized packing material.
一项研究旨在探究成熟堆肥作为生物过滤介质，从堆肥过程的废气中去除硫化氢（HS）的应用。从城市固体废物中选择的源厨房垃圾在反应器中进行堆肥，废气通过填充有 1:4（湿重）成熟堆肥和沙子混合物的生物过滤器进行过滤。在灭菌和未灭菌条件下应用了两种处理方法来量化微生物活性的贡献。还研究了填充深度对 HS 去除效率的影响。在生物过滤器中，对于负载率在 0-429 mg HS m h 的范围内，获得了 51%的全球 HS 去除效率。吸附能力是影响 HS 去除效率的主要因素，对总去除效率的贡献为 64.2%，微生物活性的贡献为 35.8%。去除的 HS 累积量与填充高度之间的关系可以用线性方程很好地描述。该方程表明，对于未灭菌的填充材料，使用 96 厘米的填充高度可实现 99%的 HS 去除效率，对于灭菌的填充材料，使用 158 厘米的填充高度可实现 99%的 HS 去除效率。
