低温低压下非均相催化氧化处理焦化废水实验研究

Study on the treatment for coking wastewater with heterogeneous catalytic oxidation under low temperature and pressure

研究了非均相催化剂在低温低压条件下处理焦化废水的效果,通过改变催化剂的载体、浸渍溶液的种类及浓度、pH值、反应时间、催化剂的投加量、H2O2(质量分数30%)的投加量等因素,得出在低温低压下非均相催化氧化处理焦化废水的最佳条件:采用经Cu(NO3)2溶液浸渍后的γ-Al2O3为催化剂、在pH值为3、催化剂体积分数为40%、H2O2投加体积分数为4%、反应时间在3h以上时处理效果较好。原水CODCr由4540mg/L降至600mg/L以下,氨氮由552mg/L降至160mg/L以下。

The removal of CODe, and NH4^＋-N of coking wastewater by the heterogeneous catalytic oxidation under low temperature and pressure has been studied. We got optimal conditions by changing the carrier of catalyst, kinds and concentration of impregnating solution, pH, reaction time, dose of catalyst, dose of H2O2（mass fraction 30%）： take the T-Al2O3 which is impregnated by Cu（NO3）2 for catalyst, when pH value is 3, volume fraction of catalyst is 40%, volume fraction of H2O2 is 4%, reaction time above 3 h, CODCr is degraded from 4 540 mg/L to lower than 600 mg/L and the ammonia nitrogen is degraded from 552 mg/L to lower than 160 mg/L.