超声波破乳与超临界水氧化技术联用法处理洗毛废水的研究

研究了超声波破乳(UA)和超临界水氧化(SCWO)技术联合处理洗毛废水的效果,选取UA功率、处理时间和处理温度3种影响UA的因素,应用响应面法中的中心复合设计模型对UA参数进行优化分析,确定最佳的破乳参数条件为104.0W、15.0min、63.0℃,最佳条件下破乳效率为93.55%,操作参数对破乳效率的影响为:UA功率>处理温度>处理时间。确定SCWO最佳操作条件为反应温度525.0℃、氧化系数1.1、反应时间5.0min、压力25.0MPa,此时COD和氨氮的去除率分别为99.52%和32.20%,其中氨氮难以降解。根据实验结果提出,UA和SCWO联用的组合方法能实现高效回收羊毛脂的同时对废水无害化处理。

Research of wool washing wastewater treated by the combination of ultrasonic wave and supercritical water oxidation

The effect of the combination of ultrasonic wave(UA)and supercritical water oxidation(SCWO)treatment on wool washing wastewater was investigated.Response surface method(RSM)and central composite design(CCD)were used to analyze the effects of power,time and temperature on demulsification.The optimum demulsification power,time and temperature were found to be 104.0 W,15.0 min and 63.0 ℃,respectively,and the optimum demulsification efficiency was 93.55%.The effects on the efficiency of demulsification were UA power>temperature>time.The optimum parameters of SCWO were 525 ℃,25.0 MPa,oxidation coefficient of 1.1,reaction time of 5.0 min.Under the optimized conditions,the COD and ammonia nitrogen removal efficiency could reach 99.52% and 32.20%,respectively.Ammonia nitrogen was difficult to degrade.The combination method of UA and SCWO was proposed by the experimental results,realizing efficient recovery of lanolin and wastewater harmless treatment.