用英文改写这段话：“电凝聚的基本经济指标在于电能消耗。Cr（VI)去除率随着处理时间的延长而提高，但过度的处理时间将会导致能源消耗过高。 “
The fundamental economic indicator of electroprecipitation lies in the consumption of electrical energy. The removal rate of Cr (VI) increases with the prolongation of treatment time, but excessive treatment time will lead to excessive energy consumption.
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