微波辐射辅助破乳水处理工艺

以某汽车发动机制造有限公司排放的铸铁乳化废水为处理对象,研制了新型破乳剂A并辅以微波辐射,解决了原破乳工艺中存在的破乳效果差,效率低,出水COD超标等问题。考查了微波辐射功率、辐射时间、静置时间以及废水pH值对破乳效果的影响,确定了最佳的破乳工艺条件:采用破乳剂A使废水pH值为2~3,在微波功率600 W下辐射处理1 min后,室温下静置1 h。在此工艺条件下,COD去除率高达70%以上。通过对水样初始COD值对破乳效果的研究,发现微波辐射处理乳化废水具有较好的耐冲击负荷的能力。通过对水样的粘度、油珠粒径分布z、eta电位等参数的分析考查,探讨了微波辅助化学破乳的反应机制。

Technology of Microwave- Assisted Demulsification in Water Treatment

A demulsifier A was developed and a new technology of microwave - assisted demulsificatlon was proposed in order to deal with the emulsion wastewater generated from an automotive engine manufacturing company in Harbin. The optimum conditiou is as following, demulsifier A is added properly, pH range is 2-3, microwave power is 600 W, irradiation time is 1 rain, settling time is 1 h. In this way, COD removal rates of wastcwater from cast iron can come up to 70% - 75 %. Further research shows that initial COD do not affect the process obviously. In addition, the mechanism of microwave assisted demulsification was studied by measuring viscosity of the sample, size distribution of oil droplets and zeta potential.