求翻译：每次冲厕用水量约为2L，每年系统用水量为5110 m3，根据真空系统特点，所所产生的污水量与用水量差异不明显，基本等于用水量5110 m3。供水系统的电耗均值约为0.40 kw是什么意思？

Each time flushing water consumption is about 2L, 5110 system water consumption m3 per year, according to the characteristics of vacuum system, the volume of sewage and water consumption of difference is not obvious, basic 5110 M3 is equal to the water consumption. Water supply system for power consumption value of about $ 0.40 kW