高硫酸盐抗生素废水生物处理

采用0.6m3/d的酸相up-flow anaerobic sludge blanket（UASB）-气提脱硫-甲烷相UASB-se-quencing batch reactor（SBR）工艺处理高硫酸盐抗生素废水,硫酸盐还原与有机物甲烷化分别在两个反应器中进行,有效避免了硫酸盐还原菌对产甲烷菌的竞争抑制,利用空气吹脱将硫酸盐还原产物硫化物降低到一定浓度,消除了硫化物对后续单元产甲烷菌的毒害作用.80 d试验结果表明,当系统稳定运行时,进水CODCr为10 680～14 140 mg/L,SO42-为1 280～1 610 mg/L时,系统出水CODCr为760～1 020 mg/L,CODCr平均去除率为92.8%,SO42-为160～210 mg/L,平均去除率为87.7%,硫化物浓度在1.8～2.9 mg/L,平均去除率在97.1%.该系统可大大削减进水中的有机物、SO42-及反应过程中的硫化物,该系统作为高硫酸盐抗生素废水处理预处理工艺是可行的.

Biological treatment of high sulfate-containing antibiotics wastewater

Antibiotics wastewater was treated with the 0.6 m3/d pilot-scale process of acid phase UASB-gas stripping desulfurization-methane phase UASB-SBR. In this process, sulfate reduction was separated from methane production to avoid the inhibition on methane bacteria. At that time, sulfide was removed by air stripping to reduce its toxic-action on methane bacteria. Experiment results for 80 days showed CODcr, sulfate and sulfide concentration of the effluent was 760-- 1 020 mg/L, 160 210 mg/L and 1.8--2.9 mg/L,average removal rate was 92.8%, 87.7% and 97.1% when CODcr0 sulfate and sulfide concentration of influent was 10 680-- 14 140 mg/L and 1 280-- 1 610 mg/L. This system can be good pre-treatment process for antibiotics wastewater containing high concentration sulfate to enter advanced treatment technology.