基于不同氧化体系处理工业园区污水厂二级出水的研究

Treatmentof Secondary Effluentfrom Industrial Park Sewage-treatment Plant based on Different Oxidation System

采用不同氧化体系处理某工业园区污水处理厂二级出水,利用Central Coposite模型考察了H_(2)O_(2)-Fe(II)和Fe(II)-PS之间的交互作用,确定了H_(2)O_(2)/Fe(II)和Fe(II)/PS最佳比例。在此基础上考察了氧化剂不同当量比对COD、TOC、UV_(254)和色度去除效果。结果表明,H_(2)O_(2)/Fe(II)和Fe(II)/PS最佳比例分别为10.41和2.74。4种不同氧化体系降解水中有机物时,对UV_(254)去除率略高于COD。当NaClO当量比为1.5时,COD和色度去除率达到最高,分别为50.15%和96.72%。K_(2)FeO_(4)当量比为1.5时,COD去除率最高达42.41%;而色度去除率最高点却出现在K_(2)FeO_(4)当量比为1.0时,此时色度去除率达96.27%。利用三维荧光指纹图谱对其出水进行分析可知,K_(2)FeO_(4)氧化体系对色氨酸类蛋白质和腐殖质酸类物质去除效果明显;NaClO氧化体系对腐殖质酸类物质和富里酸性物质去除效果明显;Fenton氧化体系对蛋白质类物质和类富里酸物质去除效果明显;增加NaClO投加量对芳香族类蛋白质去除效果明显。

Different oxidation systems were used to treat the secondary effluent of a sewage-treatment plant in an industrial park.The interaction betweenH_(2)O_(2)-Fe(II)and Fe(II)-PS was investigated with the Central Coposite model,and the optimal ratio of H_(2)O_(2)/Fe(II)and Fe(II)/PS was determined.On this basis,the removal effects of different equivalent ratios of oxygenators on COD,TOC,UV 254 and chroma were investigated.Results indicated the optimum ratio of H_(2)O_(2)/Fe(II)and Fe(II)/PS was 10.41 and 2.74.When the organic matter in water was degraded by 4different oxidation systems,the removal rate of UV 254 was slightly higher than COD.When NaClO equivalent ratio was 1.5,the removal rate of COD and chroma reached the highest,and the removal rate were respectively 50.15%and 96.72%.When K_(2)FeO_(4) equivalent ratio was 1.5,the highestremoval rate of COD reached 42.41%;the highest chroma removal rate occurred when K_(2)FeO_(4) equivalent ratio was 1.0,and the chroma removal rate reached 96.27%.The effluent was analyzed by Three-dimensional Fluorescence Fingerprint Spectrum,and it was found that K_(2)FeO_(4) oxidation system had obvious removal effect on tryptophan protein and humic acids;NaClO oxidation system had obvious removal effect on humic acids and fulvic acids;Fenton oxidation system had obvious removal effect on protein and fulvic acid-like substances;the removal effect of aromatic proteins was obvious by increasing the dosage of NaClO.