高锰酸盐预氧化对后续生物活性炭工艺去除有机物的影响

通过测定有机物相对分子质量分布与活性炭上有机物和无机盐沉积情况,分析了高锰酸盐预氧化对后续生物活性炭工艺去除有机物的影响规律.实验结果表明,相对分子质量小于3×10³的有机物是BDOC的主要组成部分;高锰酸盐预氧化强化混凝工艺对大分子有机物(相对分子质量10×10³至0.45μm)去除的同时,使小分子有机物(0～3×10³)的含量增加,提高了活性炭进水的可生化性.与单独BAC工艺对比,高锰酸盐预氧化后使活性炭上沉积的有机物和无机盐含量分别降低了5.0mg·g^-1和4.16 mg·g^-1,减少了活性炭孔径的堵塞,延长了活性炭的使用周期.

Effect of PPC Preoxidation on BAC Process for Removing Organic Matters

The effect of PPC preoxidation on BAC process for organic pollutants removal was conducted by measuring the distribution of relative molecular mass,the concentrations of organic and inorganic matters on BAC.The results show that organic matters of relative molecular mass less than 3×10³ is the main part of BDOC.Organic matters of relative molecular mass more than 10×10³ is effectively removed in the process of coagulation with PPC preoxidation.On the other hand,organic matters of relative molecular mass less than 3×10³ is increased with PPC preoxidation,which improves the biological activity of BAC process.The concentrations of organic and inorganic matters on BAC with PPC preoxidation are reduced 5.0(mg·g^-1) and 4.16(mg·g^-1) respectively than that on BAC alone,which reduces the block of hole on GAC and increases the life time of BAC process.