Wu Yong-gang, Ren Hong-qiang, Ding Li-li
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
Huan Jing Ke Xue. 2010 Jul;31(7):1451-6.
Characteristics of double-layer biotrickling filter using high density polythene rasching rings carrier treating waste gas containing hydrogen sulphide was studied. Results showed that biotrickling filter had significant advantages of low pressure drop and even load distribution along the reactor height. When removal efficiency was greater than 90%, gas retention time was 12 s, maximum inlet load was 110 g/(m3 x h), elimination capacity was 84 g/(m3 x h). At steady state, about 37%-55% of hydrogen sulfide load was removed from the lower layer. During long-term operation, pressure drop kept to less than 280 Pa x m(-1), the backwashing period was longer than two months, no biomass accumulation happened in the lower layer, and abnormal increase in pressure drop can be used as a indicator of backwashing. Reactor recovery and restart experimental results showed that removal efficiency recovered to 95% in 1 day after 6 days without H2S, pH dramatic variation of spray liquid had significant adverse impact on biotrickling bed reactor.
研究了采用高密度聚乙烯拉西环载体的双层生物滴滤塔处理含硫化氢废气的特性。结果表明，生物滴滤塔具有显著优势，即压降较低且沿反应器高度的负荷分布均匀。当去除效率大于90%时，气体停留时间为12秒，最大进口负荷为110克/（立方米·小时），去除容量为84克/（立方米·小时）。在稳态下，约37% - 55%的硫化氢负荷从下层被去除。在长期运行过程中，压降保持在小于280帕·米⁻¹，反冲洗周期超过两个月，下层未发生生物质积累，压降异常增加可作为反冲洗的指标。反应器恢复和重启实验结果表明，在无硫化氢6天后，去除效率在1天内恢复到95%，喷淋液pH值的剧烈变化对生物滴滤床反应器有显著不利影响。
