臭氧预处理二硝基重氮酚工业废水动力学

Kinetics of DDNP Industrial Wastewater Pretreatment by Ozone

针对二硝基重氮酚(DDNP)工业废水水量大,且的硝基化合物和酚类等有毒物质含量高、其成分复杂、色度高、毒性大等问题,研究采用臭氧对DDNP工业废水进行预处理,探究了臭氧投加量、废水初始COD、初始pH、反应温度对氧化降解效果的影响和氧化降解反应动力学机制。结果表明,初始pH为7.02~10.96,臭氧投加量0.6~1.5L/min,反应温度288~333 K,COD为0.408~3.26 g/L时,臭氧氧化DDNP工业废水符合表观1级反应动力学规律。在臭氧投加量1.24 g/h、pH为9.04、废水COD为0.408 g/L、反应温度333 K、反应90 min时,废水COD的去除率高达76.7%,臭氧预处理技术为DDNP的生化处理提供了可能。

Aimed at the high quantity of dinitrodiazophenol（DDNP） industrial wastewater, high content of nitrocompound, phenols and other toxic substances,and complex composition, high chroma and high toxicity, the DDNP industrial wastewater pretreatment by ozone was researched. The effects of ozone dosage, initial COD of wastewater, initial pH and reaction temperature on the effect of oxidation degradation and the reaction kinetics mechanism of oxidative degradation were investigated. The results showed that, when pH, O3 dosage, reaction temperature, COD was 7.02~10.96, 0.6~1.5 L/min,288~333 K and 0.408~3.26 g/L respectively, the ozonization of DDNP industrial wastewater conformed to the apparent first order reaction kinetics.When O3 dosage, pH, wastewater COD, reaction temperature and reaction time was 1.24 g/h, 9.04, 0.408 g/L, 333 K and 90 min respectively, the COD removal rate reached 76.7%, the ozone pretreatment technology provided the possibility of DDNP biochemical treatment.