黏附于不锈钢表面的干淀粉的电清洗研究

Cleaning of Dried Starch Adhered to Stainless Steel Using Electrocleaning Optimization of the Experimental Conditions

利用电清洗装置研究了黏附于不锈钢表面的干淀粉的清洗,分别考察了电压、温度、清洗时间、清洗液的pH、待清洗金属所连接的电极、预润湿等参数对清洗效果的影响。以节能和清洗效率为评价标准得到的最佳清洗条件为:20℃,NaOH水溶液(pH=13),将被污染的不锈钢与阳极相连,接通5 V直流电20 min即可,无须提前润湿。在上述最佳条件下,对于难于去除的干淀粉污渍的去污率可以达到65.7%±3.4%,相对于无电流清洗提高了52%。相对于食品工业传统的清洗方法,本研究所提出的电清洗法可以在更低的温度和更短的时间内达到较高的去污率。

An electrocleaning device was used to study the cleaning of dried starch adhered to stainless steel.Different cleaning parameters such as voltage,temperature,cleaning time,pH of the washing solution,polarity and previous wetting time were studied in relation to cleaning efficiency.Optimal cleaning conditions,according to energy savings and cleaning efficiency criteria,were determined:20℃,NaOH aqueous solution(pH 13),soiled substrate connected to the cathode,direct current voltage of only 5 V and 20 min without a previous wetting time.Under these conditions,the detergency found for cleaning difficult-to-remove dry starch was 65.7%±3.4%.The detergency found by electrocleaning was 52%higher than without current.High detergency results were achieved in the electrocleaning device using lower temperature and less time than those normally used in the food industry.