低温下间歇式生物过滤系统去除高负荷H2S的效能

以鸡粪堆肥和PE混合物为填料的生物过滤系统,在较低温度下进行生物去除H2S废气的性能研究.采用间歇式运行方式,当在较高气速条件下,即EBRT为39s、32s、24s和13s,入口浓度3000mg/m3时,去除率可分别达100%、100%、100%和65%.整个系统的入口负荷为812 g/(m3·h)时,去除负荷为528 g/(m3·h).且在较低的实验温度(9~16.5℃),入口浓度50~3000 mg/m3条件下,当EBRT为39s、32s、24s时,H2S的去除率为100%;当EBRT为13s时,去除率为62%~88%.结果表明,在较低温度下,高气速,高负荷条件下,间歇式生物过滤系统对H2S具有较高的去除性能.

Performance evaluation of a biofilter treating hydrogen sulfide waste gas with high load in intermittent mode under low temperature

Performance of biological removal of hydrogen sulfide waste gas in a biofilter packed with the mixtures of chicken manure and polyethylene(PE) was investigated under low temperature.The experiment was carried out in intermittent mode.The removal efficiencies were 100%,100%,100% and 65% with inlet concentration of 3000 mg/m3 and the EBRT of 38s,32s,23s and 13 s respectively.The elimination capacity reached to 812g/(m3.h) with inlet load of 528g/(m3.h).Under the condition of low temperature from 9℃ to 16.5℃,H2S removal efficiency achieved 100% with inlet concentration of 50～3000mg/m3 and EBRT of 38s,32s and 23s.At EBRT of 13s,the removal efficiency could reach to 62%～88%.The results showed that a good performance of the biofilter was obtained with high inlet load and gas velocity under low temperature.