发动机废乳化液酸化法与陶瓷膜法处理工艺对比

Contrast between Acidification Process and Ceramic Membrane Process for Waste Engine Emulsion Treatment

对某汽车制造厂发动机车间产生的CODCr为5—8×10^4mg／L的高浓度乳化废液进行酸化破乳试验，与该厂现有陶瓷膜法比较，为新建车间污水站中的乳化液处理系统寻找比陶瓷膜工艺更经济适用的处理工艺。试验表明加浓硫酸将pH调至2，酸化40h后取中间液调节pH为10～11，再投加PAC和PAM混凝絮凝之后，COD去除率为65％，此为最优试验条件，该条件下乳化液破乳处理成本约为41．7元／m^3（包括污泥处理费）。与车间现运行陶瓷膜工艺相比，运营成本较低，但考虑到处理效果、现场环境、可操作性等因素，如选择市场上质优价廉的新型膜，则使用陶瓷膜处理乳化液是更理想的处理工艺。

High concentrated waste emulsion from a car factory engine shop, whose CODcr is 5-8×10^4mg/L, compares the effect and cost of an acidified breaking jar test with that of existing ceramic membrane system. The test shows that the optimal condition is addition of concentrated sulfuric acid to adjust pH to 2, acidification time to 40 h, with coagulation and flocculation, the COD removal rate is 65 %. Treatment cost is approximately 41.7 yuan/m3 （including sludge treatment charge）. Considering the process treatment effect, on-site environment, operability and other factors of ceramic membrane, even acidification has lower cost, but if replace with better quality and low cost membrane of the market, the cost of ceramic membrane can be largely decreased and become ideal treatment process for engine emulsion.