华东理工大学学报（自然科学版）2017，Vol.43Issue(3)：358-362,5.DOI:10.14135/j.cnki.1006-3080.2017.03.010
冷冻解冻法废切削液破乳及其影响因素
Waste Cutting Fluid Demulsification and Its Influencing Factors by Freeze-Thaw Method
冯万里 1王沥东 1何伟煜 1旷哲 1张乐华1
作者信息
- 1. 华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海 200237
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摘要
Abstract
The waste cutting fluid was treated by freeze-thaw method while the influences of freezing medium,thawing method,freezing temperature,freezing time,NaCl content and pH were investigated.On the basis of single factor test,the optimum conditions were as follows:the salt content in the waste liquid was 0-0.02 g/L and the pH was 6.0-8.0 without adding NaCl and pH adjustment,the waste cutting fluid was frozen 8 h at-8 ℃ and then thawed at room temperature.Under these optimum conditions,the COD removal rate of this waste water reached 85.2%.Using biological microscope to observe the microgram of waste cutting fluid before and after being frozen-thawed,the particle size of oil droplets in waste water was about 148 μm and they were significantly larger and easier to gather after freeze-thaw processing.The infrared spectra indicated that the waste cutting fluid precipitations was mainly esters.The treatment of 1 m3 waste cutting fluid can recover 7.65 kg of oil and grease,which consumes 42.90 kW·h.Freeze-thaw method is effective to recover esters from waste cutting fluid demulsification and to improve the biodegradability of waste water and to be a good application prospect.关键词
冷冻解冻法/废切削液/含油废水/破乳Key words
freeze-thaw method/waste cutting fluid/oily wastewater/demulsification分类
资源环境引用本文复制引用
冯万里,王沥东,何伟煜,旷哲,张乐华..冷冻解冻法废切削液破乳及其影响因素[J].华东理工大学学报（自然科学版）,2017,43(3):358-362,5.
