摘要
针对某焦化厂生化尾水,分别采用O3(臭氧)氧化及GAC(颗粒活性炭)/O3、UV(紫外光)/O3、GAC/UV/O3协同催化氧化技术进行深度处理对比实验研究。结果显示,GAC/UV/O3协同催化氧化工艺具有高效性、稳定性、经济合理性的优势。通过改变O3的投加量、UV强度来寻求最佳工况,由中试实验的数据结果得出,三者联用协同催化氧化工艺最佳运行参数为:焦化厂生化尾水温度在25~309之间、pH在7~8.5之间、SS小于70 mg/L、03投加量为30mg/L、UV强度值为630 mJ/cm^1、GAC投加量饱和时,实验废水中COD由100-130 mg/L降至60~78mg/L,有效去除率可以达到40.7%,可满足预期行业标准,甚至达到工业回用水标准。
O3(ozone)oxidation,GAC(granular activated carbon)/O3,UV(ultraviolet)/O3 and GAC/UV/O3 synergistic catalytic oxidation were used to treat the biochemical secondary effluent of the coking wastewater,respectively.The results showed that the GAC/UV/O3 co-catalytic oxidation process had the advantages of the high efficiency,a good stability and the economic rationality.The optimal operating conditions were investigated by changing the amount of ozone and the intensity of ultraviolet light.According to the results of pilot test,the optimal operating parameters of the three combined catalytic oxidation processes were as follows:When the temperature of the biochemical secondary effluent of coking wastewater was between 25?30℃,pH was between 7?8.5 and SS was below 70 mg/L,the COD(chemical oxygen demand)index of coking wastewater was degraded from 100~130 mg/L to 60~78 mg/L with 30 mg/L of O3 dosage,630 mJ/cm^2 of UV intensity value and saturated addition of GAC,the removal efficiency of COD reached to 40.7%,which can achieve the industrial standards and even meet the reuse water quality standards for the industrial uses.
作者
吴春旭
武哲如
王鸿英
袁婧
成钢
陈兆林
WU Chunxu;WU Zheru;WANG Hongying;YUAN Jing;CHENG Gang;CHEN Zhaolin(School of Environment,Tsinghua University,Beijing 100084,China;Beijing Guohuan Tsinghua Environmental Engineering Design&Research Institute Co.Ltd.,Beijing 100084,China;International Economic&Technical Cooperation and Exchange Center,Ministry of Water Resources,Beijing 100053,China;Shanxi Academy of Environmental Planning,Taiyuan 030002,China)
出处
《环境保护科学》
CAS
2020年第2期35-38,共4页
Environmental Protection Science
基金
国家水体污染控制与治理科技重大专项(2018ZX07402005)。
关键词
焦化废水
高级氧化
臭氧
协同催化
Coking Wastewater
Advanced Oxidation Processes
Ozone
Synergistic Catalytic Oxidation
