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采用TiO2光催化降解对青霉素生产废水进行了处理,分别用玻璃负载TiO2膜和TiO2粉末(P25)研究了反应时间、TiO2粉末投加量或镀膜次数、pH、曝气量、辐射功率以及初始废水污染物含量对处理效果的影响。结果表明,当使用TiO2粉末作为催化剂时,在反应时间为2 h、TiO2粉末投加量为500 mg/L、pH为3、辐射功率为35 W、曝气体积流量为0.4 L/min的优化条件下,TOC的质量浓度从107.3 mg/L降至59.6 mg/L,去除率达45.5%;COD从389.6mg/L降至217.0 mg/L,去除率达44.3%;色度从156度降至78度,去除率达50.0%。当使用TiO2负载膜作为催化剂时,在反应时间为1.5 h、镀膜4次、pH为3、辐射功率为25 W、曝气体积流量为0.2 L/min的优化条件下,TOC的质量浓度从107.3 mg/L降至81.3mg/L,去除率达24.2%;COD从389.6 mg/L降至286.7 mg/L,去除率达26.2%;色度从156度降至106度,去除率达32.3%;随着初始废水污染物含量的降低,去除率逐渐增加。
The photocatalytic degradation of penicillin was used to treat the waste water of penicillin production. The effects of reaction time, dosage of TiO2 powder, number of coating, pH, aeration, radiant power and initial wastewater were studied by using glass-supported TiO2 membrane and TiO2 powder (P25) Effect of pollutant content on treatment effect. The results showed that when TiO2 powder was used as the catalyst, the optimal reaction time was 2 h, the dosage of TiO2 powder was 500 mg / L, pH was 3, radiant power was 35 W and aeration volume flow rate was 0.4 L / min Under the conditions, the mass concentration of TOC dropped from 107.3 mg / L to 59.6 mg / L, the removal rate reached 45.5%; COD decreased from 389.6 mg / L to 217.0 mg / L, the removal rate reached 44.3% To 78 degrees, the removal rate of 50.0%. Under the optimal conditions of reaction time 1.5 h, coating 4 times, pH 3, radiant power 25 W and aeration volume flow rate 0.2 L / min, the mass concentration of TOC increased from 107.3 mg / L to 81.3mg / L, removal rate of 24.2%; COD from 389.6 mg / L to 286.7 mg / L, the removal rate of 26.2%; color from 156 degrees to 106 degrees, the removal rate of 32.3% ; With the initial wastewater pollutant content decreased, the removal rate gradually increased.