The reverse osmosis system, the cleaning fluid demand: each 8-inch membrane elements need cleaning fluid 34l, pipes and filter cleaning fluid required for 100l, consider the initial emissions and set aside about 30%, the total (34 * 8 +100 ) * 1.3 = 500l.

Reverse osmosis system: Each washing liquid demand support 8 -inch membranes need to be washed, pipelines and filter 34 L required for 100 L washing fluid, taking into account initial emissions and reserved about 30 per cent and total volume (34 * 8 * 1.3 = 500 + 100) L.

Counter-seepage system cleaning liquid demand computation: Each 8 inch membrane part needs cleaning liquid 34L, the pipeline and the filter needs the cleaning liquid is 100L, considered the initial emissions and the reservation quantity about 30%, equal (34*8+100)*1.3=500L.

Cleaning of reverse osmosis system demand: each 8-inch film components need cleaning fluid 34L, pipe and filter needs cleaning fluid for 100L, taking into account the initial emission and reserved around 30%, sum (34*8+100) *1.3=500L.