吸附—氧化法处理高盐石化废水的研究

对于高盐废水处理,常用的厌氧生物工艺和铁碳处理工艺均有局限性。在查阅相关文献的基础上,研究采用吸附—氧化工艺对某石化工厂生产的高盐废水进行了处理,并比对了两种氧化工艺在该方法中的适用性。研究发现,GAC吸附工艺无法使废水TOC达到20 mg/L以下。对于GAC吸附后的出水,NaClO氧化技术中,NaClO投加量5.5 mL/L时,出水TOC即可以达到16.9 mg/L,但由于向废水中引入了总余氯,还需投加Na_2SO_3去除水样中的余氯,最终出水TOC为17.0 mg/L;O_3氧化工艺中,当O_3的投加量为76.5 mg/L时,出水TOC即可以达到18.7 mg/L。

For the treatment of high-salt wastewater, the commonly used anaerobic biological treatment process and iron-carbon treatment process have limitations. On the basic of relevant literatures, this paper studied the adsorp- tion-oxidation process on the treatment of high-salt wastewater from a petrochemical plant, and compared the applicability of two different oxidation processes in this method. The study results show that single granular activated carbon （GAC） adsorption couldn＇t make the total organic carbon （TOC） of outlet below 20 mg/L. To treat the wastewater after granular activated carbon （GAC） adsorption, for sodium hypochlorite （NaC10） oxidation technology, when the NaC10 dosage reached 5.5 mL/L, the outlet TOC can reach 16.9 mg/L, but due to the introduction of total chlorine into the wastewater by the NaC10 process, sulfur acid sodium （Na2SO3） is added to remove the total chlorine, the final effluent TOC is 17.0 mg/L; for ozone （03） oxidation process, when the dosage of 03 reaches 76.5 mg/L, the outlet TOC can reach 18.7 mg/L.