4. Approach to the cost of graywater recycling

The capital costs of a treatment plant mainly include the cost of the process itself, the dual supply networks (drinking water and recycled water) and collection networks (black water and grey water), upstream and downstream storage tanks, and measuring and control equipment. Operating costs depend on the type of process used, but energy consumption often dominates. To this must be added process and pipe maintenance, and the purchase of chemicals... Table 13 shows the cost ranges for a number of processes . The cost price of recycled...