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采用催化超临界水氧化(CSCWO)技术处理高氮、高有机物浓度的吡虫啉废水,考察了催化脱氮效果的影响因素以及催化剂流失情况。结果表明:升高温度能明显提高脱氮效率,当温度升至550℃时,对TN的去除率高达99.97%,出水TN值仅为3.08 mg/L;当分别以Cu(NO3)2、MnSO4、CuSO4作为均相催化剂时,CuSO4的催化脱氮效果最好;当以CuSO4为催化剂时,在14次的连续运行中,出水中均可检测到Cu2+,其中有6次出水中的Cu2+浓度超标,且Cu2+流失速率最高可达2.593 2 mg/s。
Catalytic supercritical water oxidation (CSCWO) was applied to treat the high concentration of nitrogen and high concentration of imidacloprid wastewater. The influencing factors of catalytic denitrification and the loss of catalyst were investigated. The results showed that the removal efficiency of TN was 99.97% and the effluent TN was only 3.08 mg / L when the temperature was raised to 550 ℃ when the temperature was raised. When the contents of Cu (NO3) 2, MnSO4 , CuSO4 as a homogeneous catalyst, CuSO4 the best catalytic denitrification; CuSO4 as a catalyst, in 14 consecutive runs, the effluent can detect Cu2 +, of which 6 out of the water concentration of Cu2 + , And Cu2 + loss rate up to 2.593 2 mg / s.