多频超声波清洗机在叶类蔬菜清洗中的应用

Application of Multi-frequency Ultrasonic Washer on Leafy Vegetables Cleaning

清洗是蔬菜加工的关键环节,对品质至关重要。采用自行研制的超声及气泡式清洗设备对消费量较大的叶类蔬菜(生菜)进行清洗,以洗净率和破损率为指标,对清洗效果进行评价。结果表明,气泡式清洗在清洗时间40 s,洗菜量500 g条件下,生菜洗净率达到100%,此时破损率为12.89%;采用超声清洗时,在频率68 kHz,功率900 W,时间40 s,洗菜量750 g条件下,生菜洗净率为100%时,破损率为9.62%。可见当清洗时间相同,洗净率均达到100%时,超声清洗方式的洗菜量增加50%,破损率降低25.4%。因此,超声清洗方式更具优势。

Cleaning is one of the key link in vegetables processing,which is vital for the quality.In this paper,the self-developed ultrasound and air-bubble washing devices were employed to wash a widely consumed leafy vegetable(lettuce),and then the cleaning effects were evaluated using cleaning ratio and damage ratio as indicators.Results indicated that cleaning ratio of lettuces reached to 100%with a damage ratio of 12.89%using air-bubble cleaning technology under the following conditions:washing time of 40 s and lettuces weight of 500 g.While the cleaning ratio of lettuces reached to 100%with a damage ratio of 9.62%when lettuces of 750 g was washed with the ultrasonic cleaning device under the ultrasonic frequency of 68 kHz,ultrasonic power of 900 W and washing time of 40 s.These data demonstrated that the washing amount was increased by 50%while the damage ratio was reduced by 25.4%when lettuces were washed using ultrasonic cleaning technology under the same washing time and cleaning ratio.Therefore,ultrasonic cleaning technology displayed superior advantages.