A/O^2+酸析-催化氧化工艺处理精制棉废水的中试研究

The pilot test on the treatment of refined cotton wastewater by A/O^2+adification-catalytic oxidation process

精制棉废水属于难处理的工业废水之一,本文采用A/O2+酸析-催化氧化工艺对其进行处理,并取得了良好的中试效果.生化部分的COD去除率达82%以上,色度去除率高于50%.实验结果表明,酸析过程中调节pH约为2.5,催化氧化过程中H2O2及FeSO4的投药量分别为0.8mg·L-1与160mg·L-1时,后处理的主要出水控制指标COD降至135mg·L-1以下,色度降至150倍以下.此外,通过观察发现脱氢酶活性较高,生物相中能反应水质良好的固着性纤毛虫和钟虫占优势.

A/O^2＋ adification-catalytic oxidation process is adopted to deal with the refined cotton wastewater which is one of the most intractable industrial wastewater,and there is a good result in the pilot test.In biological part,the removal rate of COD and color is respectively over 82% and 50%.When the pH in adification is about 2.5,and the reagent dose of H2O2 and FeSO4 is respectively 0.8 mg/L and 160 mg/L,the main index COD of water after treatment drops below 135mg/L,and the color degree is less than 150 times.In addition,according to the observation,the dehydroenase′s activity is higher,and the rotifer and vorticella are the dominant microbes in biological phase.