Backwash Water Reuse, Treatment, and Disposal

The waste problem could also be handled from the generation side, where the main aim is to reduce the amount of waste generated in the first place, by adopting plant designs that generate little or reusable/recyclable wastes. At all times, the goal of water treatment plant waste management is to dispose of or treat the waste in an economical and environmentally acceptable matmer. 

In many countries the regulations for disposal are very exigent, and in this way treatment plants must treat the backwash water that is used during the normal operation. In the United Kingdom, there is a drinking water plant that used two units of ultrafiltration in its process. The first one is a pretreatment for RO units, and the second one is to treat the water used in the cleaning of the membranes. 

About 90% of source water suspended solids will be removed by sedimentation under normal circumstances, leaving the remaining 10% of fighter floe to be passed to the MF or UF system. During filter backwashing, the dirty water (mainly consisting of fines 

A number of major disposal areas for backwash water exist The source water from which it came, the nearest wastewater pollution control plant, and a sanitary landfill or other means of land disposal. The choice of ultimate disposal option will dictate the type of treatment required and the degree of concentration needed to prepare it for that method of disposal. 

Abdessemed, D., and Nezzal, G. (2002). Treatment of primary effluent by coagulation-adsorption-ultrafiltration for reuse. Desalination 152, 367-373. 

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