棉浆黑液组合处理工艺的试验研究

采用不同的生化-物化组合工艺处理棉浆黑液试验结果表明,先生化处理后进行酸析、中和的工艺比先酸析、中和后生化处理工艺的效果更好,棉浆黑液的总CODCr及色度去除率可分别达88%和95%左右;与化学混凝工艺相比,酸析工艺可以实现"以废治废",节约污水处理运行成本.经酸析、中和工艺处理后的废水与0.4%的聚合硫酸铝铁进行混凝处理后,废水的COD单元去除率仍可达50%以上,色度降低了4倍.

Research on the Package Treatment Process for the Black Liquor of Cotton Pulp

Different biological and physiochemical package treatment processes are adopted to treat black liquor of cotton pulp.The results show that biological-acidification package process is better than the acidification-biological package process and the removal rate of total COD and chroma can respectively reach 88% and 95%;compared with chemical flocculation process,acidification can save the cost of wastewater treatment by utilizing the waste acid.After the flocculation of wastewater being acidified and neutralized and 0.4% of poly aluminum ferric sulphate(PFAS),the removal rate of COD can reach above 50% and the chroma decreases four times.