Fenton-UASB-生物接触氧化处理Fischer-Tropsch合成废水的研究

Study on Fischer-Tropsch synthesis waste water treatment by Fenton-UASB-Biological contact oxidation

用Fenton-UASB-生物接触氧化组合工艺对Fischer-Tropsch合成废水进行处理。实验结果表明,采用Fenton法对废水进行预处理,在pH值为3,H2O2的投加量为30 mL/L,Fe2+投加量为1.2 g/L,反应时间为120 min时,去除了63%的CODCr,有效地提高了废水的可生化性;Fenton预处理出水经UASB厌氧生物处理后,CODCr去除率达90%以上;最后经接触氧化后,出水CODCr达100 mg/L以下,达到了GB8978-1996《污水综合排放标准》中化工类废水的二级排放标准。

The waste water from Fischer-Tropsch synthesis plant was treated by Fenton-UASB-Biological contact oxidation combined process.The results showed that the pretreatment of the waste water by Fenton oxidation can not only eliminate CODCr by 63%,but also improve its bio-degradability effectively when the pH was 3,reaction time were 120 min and dosage of H2O2 and Fe2＋ was 30 mL/L and 1.2 g/L respectively;after treatment by UASB anaerobic,the CODCr removal rate could reach up to 90%;and finally after contact oxidation,the effluent CODCr was below 100 mg/L,which can meet the second discharge standard of chemical waste water in GB8978-1996 Integrated Wastewater Discharge Standard.