摘要
采用Fe^(2+)/K_2S_2O_8氧化法预处理半合成抗生素废水,通过化学除磷试验,选取最佳除磷药剂并确定其最佳投加量;通过正交试验及单因素优化试验确定Fe^(2+)/K_2S_2O_8氧化的最优反应条件.结果表明,最佳除磷药剂为Ca O,当投加量为1800 mg/L时,出水TP<10 mg/L,出水p H值>11,利于后续实验.除磷后的废水再用Fe^(2+)/K_2S_2O_8体系氧化,当Fe SO_4和K_2S_2O_8投加量分别为1.3 mmol/L和0.7 mmol/L,反应时间为50 min,除磷后的废水初始p H值不调节时废水COD和色度去除率分别能达到63.4%、62.5%,且B/C也从0.2升到0.5,使废水的可生化性提高.
In this work,the semi-synthetic antibiotics wastewater was treated by Fe^(2+)/K_2S_2O_8 oxidation. The optimumflocculant and dosage were determined by the test of chemical phosphorus removal. The optimum reaction conditions for Fe^(2+)/K_2S_2O_8 oxidation was also dertermined by the orthogonal test and further single factor test. The results showed thatCa O had a highest removal of TP and the optimum dosage was 1800 mg/L. In this condition,the TP concentration ofeffluent was lower than 10 mg/L,and the p H was above 11,which favored the followed experiments. In oxidationexperiments,the removal efficiencies of COD and chroma could reach 63.4% and 62.5% respectively,under the conditionof FeSO_4=1.3 mmol/L,K_2S_2O_8=0.7 mmol/L,reaction time=50 min and the initial p H=7.0. Furthermore,the B/C ofthe wasterwater increased from 0.2 to 0.5,suggesting the wastewater biodegradability was increased.
出处
《河南科学》
2017年第8期1274-1279,共6页
Henan Science
基金
河南省科技攻关计划项目(162102310349)
