I. Water purification equipment
Water purification equipment is the core equipment of the whole direct drinking water system.
Pretreatment system-including micro-flocculation filtration, activated carbon adsorption, softening, fine filtration, etc. Its main function is to remove colloid, organic matter, bacteria and chlorine, so as to meet the water inflow requirements of the subsequent membrane treatment system.
Membrane filtration device-according to the quality of raw water, ultrafiltration, nanofiltration or reverse osmosis can be selected. When the conductivity of raw water is high, the first-stage reverse osmosis can be used to obtain high-quality drinking water containing a certain amount of minerals.
Second, the post-processing system
Post-treatment systems generally include sterilization and disinfection. In some cases, mineral addition devices are also needed.
The basic requirements of sterilization applied to direct drinking water system are: strong instantaneous sterilization ability, certain continuous sterilization ability, instant drinking without affecting the taste of water, simple operation and convenient maintenance. Although ultraviolet disinfection has instantaneous sterilization effect, it has no continuous sterilization ability. Ozone has strong oxidation, which may react with trace elements and minerals in the purified water in the pipeline to produce precipitation or colloidal substances; Generally, ozone and ultraviolet disinfection are combined to achieve sterilization requirements without affecting the taste of drinking water.