以磷矿石为填料的生物滴滤塔处理含挥发性脂肪酸的臭气

对磷矿石为填料的生物滴滤反应器净化挥发性脂肪酸臭气的净化能力进行了研究，实验考察了空床停留时间、进气浓度和进气体积负荷等参数对净化效果的影响，研究结论如下：在挥发性脂肪酸浓度不变的条件下，停留时间越长，废气的净化效果越好。进气浓度控制在205.80~677.40 mg·m-3的条件下，废气在反应器中的停留时间为97 s时，废气所获得的净化效率为99%；停留时间波动不大的情况下，反应器对挥发性脂肪酸的净化效果随进气浓度的增加而降低。当空床停留时间65~97 s条件下，臭气的进气浓度为224.29 mg·m-3时，去除率达到100%；臭气进气浓度增至1 345.71 mg·m-3时，去除率降到98.60%；当臭气浓度进一步增至4 934.29 mg·m-3时，去除率降至67.40%；在停留时间波动不大的情况下，废气的净化效率随进气的体积负荷呈先增加后降低的趋势。空床停留时间65~97 s条件下，当臭气的体积负荷为3.14 g·（m3·h）-1时，去除率约为99.20%。当体积负荷增至18.08 g·（m3·h）-1，去除率降到97.6%。当进气体积负荷继续增至39.25 g·（m3·h）-1时，去除率降到89.25%。总之，磷矿石作为生物反应器的填料具有一定可行性。

Treatment of a waste gas containing volatile fatty acids by bio-trickling filter with phosphate rock as matrix

In this study, the ability of a bio-trickling filter packed with phosphate rock to remove volatile fatty acids (VFAs) was examined. The inhibitory effects of the empty-bed residence time (EBRT), inlet VFA concentration, and inlet volume load on the VFA removal efficiency (RE) were thoroughly investigated. The results showed that an increase in the EBRT increased the VFA removal. At a residence time of 97 s, corresponding to inlet concentrations of 205.80 to 677.40 mg·m-3, a VFA removal efficiency of 99% was observed. The removal efficiency of the bio-trickling filter decreased with increasing inlet concentration. At inlet concentrations of 224.29, 1 345.71, and 4 934.38 mg·m-3, corresponding to EBRTs from 65 to 97 s, the removal efficiencies were 100%, 98.60%, and 67.40%, respectively. The removal efficiency was also influenced by the mass loading of the inlet gas. Under VFA mass loadings of 3.14, 18.08, and 39.25 g·(m3·h)-1, corresponding to EBRTs of 65 to 97 s, the VFA removal efficiencies were 99.2%, 97.60%, and 89.25%, respectively. Overall, the sustained biotreatment of VFAs by a bio-trickling filter was found to be feasible.