Hardness of reverse osmosis raw water 150, chlorine 20, silicon18; The water yield is 60, and the concentrated water is 30. Now it is planned to reuse some concentrated water as raw water. Is it feasible? What's the mixing ratio? 1. Reverse osmosis concentrated water can be completely reused, and the specific recycling method is determined according to the actual situation such as tap water price, water supply situation and recycling cost.

2. The mixing ratio depends on your equipment performance and water production requirements. For example, the raw water supply requirements of single-stage, two-stage and three-stage reverse osmosis equipment are different, and the mixing ratio is also different. It is best to set the standard of reuse water index according to the maximum water inflow limit of existing reverse osmosis equipment.

Note: Reuse of concentrated reverse osmosis water should be considered. A series of outstanding problems such as the lack of water resources and the provision of water price, in industry or civil use, reverse osmosis is actually a water treatment equipment with high water consumption, and the reuse of reverse osmosis concentrated water is the general trend, so it is necessary to improve the water utilization rate of reverse osmosis water treatment equipment.

(Technical Department of Toumar Water Treatment Seawater Desalination Equipment Factory, Taizhou Luqiao) for reference.