Effect Of H₂O₂/UV Advanced Oxidation Technology In Wastewater On Molecular Weight Distribution

Dyeing and finishing industry in the process will emit large quantities of highlypolluting and difficult to deal with industrial waste, and its general characteristics ofhigh color, high organic content, water temperature, high suspended solids, stronglyacidic or alkaline, and a small amount of toxic substances and heavy metals. As theproduct is a batch production and a wide range of raw materials and products, so thewater quality characteristics of the wastewater generated is not stable, handling moredifficult. If not properly treated water discharged directly into the river, very bigimpact on river ecology.This study evaluated the impact of H2O2/UV Advanced oxidation technologiesfor printing and dyeing wastewater molecular weight distribution. Study reactive azodye Evercion Red H-E3B with polyvinyl alcohol （PVA） were simulated dyeingwastewater chroma and DOC, artificial dyeing wastewater into three water samples: Awater sample: artificial dyeing wastewater （DOC=57.1mg/L）, B water samples:Coagulation artificial dyeing wastewater （DOC=38.3mg/L）, C water samples:artificial dyeing wastewater （DOC=38.3mg/L）, the other is a real D watery dyefactory whole effluent, DOC was26.2mg/L. For each sample in water, the solutionwas maintained throughout the process a pH of4, and the intensity of UV light,oxidation time, H2O2dosage is operating variables analyzed DOC, chroma, H2O2residues and molecular weight changes, more H2O2/UV Advanced oxidationtechnologies of the three water samples in DOC mineralization efficiency, the reactiondynamics and the required power consumption, and then dyeing and finishing planteffluent to be real H2O2/UV advanced oxidation processes, and examine its treatmenteffect. All experimental batch H2O2/UV light reactor.The results showed that the four water samples can be completely removed DOCand color in the appropriate dose and light intensity H2O2, DOC mineralization andH2O2reaction rate constants were KDand KH, both with H2O2dosage and increased with UV light intensity, but H₂O₂at high doses, KDand KHdecreased. In addition,with the increase of H₂O₂dosage required power with the decline, but more than theoptimum dosage required H₂O₂but increased power consumption, the power requiredto remove1KgDOC size of four water samples at the same dose followed by H₂O₂Awater sample>C water sample> D water sample> B water sample.H₂O₂/UV Advanced oxidation technologies can significantly reduce the amountof high molecular weight organic compounds in waste water, and make a smallmolecular weight organic matter mineralization into CO2and H2O. If waste water istreated by coagulation, combined H₂O₂/UV Advanced oxidation technologies canreduce costly H₂O₂oxidation time savings and reduce the dose of light requiredelectricity.