填充大孔载体的生物滴滤塔脱除H2S的研究

在生物滴滤塔反应系统中，利用大孔聚氨酯载体固定渗滤液处理厂活性污泥中的自养菌，进行为期1年的脱除H?2S臭气的试验研究。结果表明：污泥经过预曝气、选择驯化、挂膜固定化和直流驯化4个阶段共18 d的培养后，系统成功启动；最佳运行条件pH为2.16，营养液喷淋速率为70 mL/min，空塔停留时间为25 s；当H₂S去除率为100%时，系统所允许的最大污染物容积负荷为114 gH₂S/(m³载体?h)，是鲍尔环滴滤系统的5倍。试验还发现：H₂S脱除反应的最终产物以SO₄^2-为主，且SO₄^2-4浓度与pH、氧化还原电位有很好的相关性。

H2S Gas Removal in the Biotrickling Filter with a Macroporous Carrier

A kind of macroporous carriers was used to immobilize acclimated activated sludge in a biotrickling filter for removing hydrogen sulfide (H₂S). The experiments on removal of H₂S had been carried out in the reactor system for about one year. The period of start up could be divided into four stages, including pre bubbling, selective culture, immobilization and direct H₂S culture. It needed only 18 days to start up the system and to operate steadily. The optimum pH, rate of spray nutrient and empty bed residence time were 2.16, 70 mL/min and 25 s, respectively. When the removal efficiency of H₂S was 100%, the maximum influent load of the biotrickling filter (114 gH₂S/(m3carriers?h)) was five times that of the plastic pall rings biotrickling filter. The main metabolism end products were sulphate while the by products were whitish yellow sulphur suspensions. Close correlation was found among pH, oxidation reduction potential (ORP) and concentration of sulfate.