射流曝气法处理硫酸软骨素工业废水的研究

STUDY OF CHONDROITIN SULFATE WASTEWATER TREATMENT BY JET AERATION

使用培养驯化的活性污泥,经射流曝气工艺处理该絮凝后的废水,最佳工艺条件为:进水的pH为7,温度为30℃,混合液中总的悬浮固体浓度(MLSS)5000mg·L-1,气水体积比为2:1,曝气时间2h。在该最佳条件下处理后的废水,pH为7.5,COD98mg·L-(1去除率97.2%),BOD557mg·L-(1去除率93%),已经达到肉类加工工业水污染物排放国家一类水排放标准。

The wastewater which was flocculated by chitosan was treated by jet aeration process with activated sludge which was cultured and acclimated. The best condition of technology was： the pH of in-water was about 7.0, the temperature was 30℃, the mixed liquor suspended solid（MLSS） was about 5000 mg·L^-1, the ratio of gas-water＇s volume was 2：1, and the aeration time was 2 h. In this best conditions to deal with, the indicators of the wastewater was： pH of 7.5, COD of 98 mg· L^-1 （the removal ratio of COD was 97.2%）, BOD5 of 57 mg· L^-1（ the removal ratio of BOD5 was 93%）. It can reach first water standards of the national wastewater emission standard of meat processing industry.