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针对山东某化工厂生产过程中产生的酚醛工业废水具有COD高(25 g/L)、难生物降解、对微生物有较大毒性的水质特点,研究采用“多级Fenton+生化”组合工艺进行处理。其中“一级Fenton+水解酸化+UASB+接触氧化”作为系统的核心技术,有机污染物主要在这一工艺环节中被去除;进而采用“二级Fenton+曝气生物滤池+三级Fenton”这一深度处理工艺,废水中剩余的污染物进一步氧化降解,再通过活性炭滤池过滤后,其出水COD降至约为94.9 mg/L,满足小于100 mg/L的要求。其他指标通过本工艺亦完全达到排放标准。
Aiming at the phenolic wastewater with high COD (25 g / L), poor biodegradability and high toxicity to microorganism, the phenolic industrial wastewater produced in the process of a chemical plant in Shandong Province was studied by the combination of “multi-stage Fenton + biochemistry” deal with. Among them, “a Fenton + hydrolytic acidification + UASB + contact oxidation” as the core technology of the system, organic pollutants are mainly removed in this process; and then use the “two Fenton + BAF + three Fenton ”In this advanced treatment process, the remaining contaminants in the wastewater are further oxidatively degraded. After filtration through the activated carbon filter, the effluent COD drops to about 94.9 mg / L, meeting the requirement of less than 100 mg / L. Other indicators through this process also fully meet the emission standards.