采用活性炭物理吸附和Fenton光催化氧化技术处理皂素生产双烯过程中产生的生物难降解废水。通过测量化学需氧量(CODCr)得到降解效果过程。当在可见光(λ〉420nm)照射下,pH=3.0,n(Fe2+)∶n(H2O2)=1∶7.49时,废水的降解率为71.2%。为比较不同光源的影响,在相同条件下,分别采用紫外光(330nm〈λ〈380nm)、太阳光、可见光(λ〉420nm)3种不同光源,结果表明,120min光催化降解COD去除率分别为94.3%、90.3%及71.2%,结合活性炭吸附处理均可达到废水排放标准。多次添加H2O2与一次添加H2O2的试验结果表明,多次添加可以提高H2O2的利用率,节约H2O2的投加量。
The present paper is aimed at introducing its authors' new method of photocatalytic oxidation of diene wastewater produced from saponin process. For the research purpose, we treated the diene typical wastewater produced from this process by absorbing the activated carbon and Fenton photocatalytic oxidation. Since the chemical oxygen demand (CODcr) assay showed that the degradation rate is 71.2%, when it was irradiated by visible light (λ 〉 420 nm) at n (Fe^2+ )/n(H2O2) = 1/7.49 and pH = 3, the effect of the illumination irradiated by different light-lamps on the degradation has to be studied by the photocatalytic degradatin of wastewater by Fentun under three lighting regimes: UV light (330 nm〈λ 〈 380 nm), sunlight and visible light (λ 〉 420 nm) .The removal COD proves to be 94. 3%, 90.3% and 71.2% respectively under the three lighting conditions for 1 h irradiation. Then the wastewater would experience absorption of activated carbon that can be expected to achieve the wastewater discharge standard. Thus, the results indicate that the addition of H202 several times could be made much more effective than one time and save its amount.