无花果盐渍水回收处理技术研究

Study on Recycling Technology of Fig Saline Water

采用活性炭和硅藻土联合处理高盐度无花果盐渍水,即用活性炭对无花果盐渍水进行前处理后,再用硅藻土助滤处理。通过单因素分析和正交试验,考察活性炭处理无花果盐渍水时的添加量、作用时间、作用温度和硅藻土的添加量对无花果盐渍水处理效果的影响,以盐度和白度(Wh)为指标,确定其最佳工艺参数。当活性炭的添加量为2.2%,作用时间为65min,处理温度为50℃时,硅藻土添加量为2.0%,能够将盐度为22.67%、Wh值为87.08的无花果盐渍水处理成盐度为21.87%、Wh值大于95.0的盐渍水。数据说明盐分保留高同时脱色澄清效果好。再将处理后的无花果盐渍水中的盐,通过蒸发浓缩结合烘干工艺进行回收,回收率:76.31%;纯度:98.12%;Wh≥85。

Combined treatment of high salinity fig saline water uses active carbon and diatomite, namely to fig saline water is pre-treated by active carbon and diatomite filtration treatment later. Through single factor analysis and orthogonal experiment, inspect the effects of the addition of active carbon treatment on fig saline water when adding amount, reaction time, temperature and diatomite to the fig saline water treatment effect, the salinity and the whiteness(Wh) as the index, the optimum process parameters, combinewith concentrated by evaporation drying process for recycling, recovery and utilization of fig saline water and salt. If the amount of active carbon is 2.2%,reaction time is 65 min, the processing temperature is 50 degrees centigrade, diatomite addition amount is 2.0%, it can change the fig saline water which the salinity is 22.67% and the whiteness is 87.08 into fig saline water which the salinity is 21.87%, whiteness is more than 95. The data indicate that salt retention and high decolorization had better effect. Concentrated by evaporation drying process with the recovery of salt, recovery rate: 76.31%; the purity of the recycling salt: 98.12%; Wh≥85.