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Treatment of waste cutting fluid enhanced by combining emulsion-breaking coagulation with sponge iron/Fenton oxidation processes

机译：通过将破乳凝结与海绵铁/芬顿氧化工艺相结合，增强了对废切削液的处理

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摘要

Machining cutting fluid wastewater is difficult to treat because of its degree of emulsification, high chemical oxygen demand (COD) concentration, complex composition, and low biodegradability. A combination of emulsion-breaking coagulation with sponge iron/Fenton oxidation processes was used to treat waste machining cutting fluid. The treatment process was optimized using single- and orthogonal-factor tests, and the feasibility of reusing the effluent was investigated. The results showed that the optimum operating parameters were a twofold dilution, 1.5% D03, 0.01% polyacrylamide, and pH 8. The COD removal efficiency of sponge iron/Fenton oxidation reached 99.2%. The same removal efficiency was obtained when reusing the effluent under the experimental conditions when the dilution multiple exceeded threefold. The process is an efficient, environmentally friendly method for treating waste cutting fluids.
机译：由于切削液的乳化程度高，化学需氧量（COD）浓度高，组成复杂且生物降解性低，因此难以处理切削液废水。破乳凝结与海绵铁/ Fenton氧化工艺的结合被用于处理废加工切削液。使用单因素试验和正交因素试验对处理工艺进行了优化，并研究了废水回用的可行性。结果表明，最佳操作参数为稀释倍数，1.5％D03、0.01％聚丙烯酰胺和pH8。海绵铁/芬顿氧化的COD去除效率达到99.2％。当稀释倍数超过三倍时，在实验条件下重复使用废水时，可获得相同的去除效率。该方法是处理废切削液的有效，环保的方法。

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