Three solutions of reclaimed water purification equipment
Release date: November 27, 2019 11:33:40
Purified water treatment equipment technology: one is to treat it to the standard of drinking water and directly reuse it in daily life, that is, to realize the direct recycling of water resources. This treatment method is suitable for areas where water resources are extremely scarce, but the investment is high and the process is complex; The other is to treat it to the standard of non drinking water, which is mainly used for water not in direct contact with human body, such as toilet washing, floor and car cleaning, greening, fire control, industrial water, etc.
However, the direct use of water resources in daily life is a way to realize the high standard of drinking water treatment;
2. The other is to treat it to the standard of non drinking water, which is mainly used for water not in direct contact with human body, such as toilet washing, floor and car cleaning, greening, fire fighting, industrial common water, etc. This is the usual medium purified water treatment equipment.
According to the treatment methods, the equipment and process of intermediate purified water treatment are generally divided into three types:
1. Physical treatment of purified water equipment:
Membrane filtration method is suitable for water quality changes.
The features of this process are: the device is compact, easy to operate, and less affected by load changes.
Membrane filtration method is that under the action of external force, the separated solution flows along the surface of the filter membrane at a certain flow rate. The solvent, low molecular weight substances and inorganic ions in the solution pass through the high pressure side of the filter membrane and enter the low pressure side, and are discharged as filtrate. The macromolecular substances, colloidal particles and microorganisms in the solution are intercepted by the ultrafiltration membrane, and the solution is concentrated and discharged in the form of concentration.
2. Physicochemical method
It is suitable for the situation that the sewage quality changes greatly. The commonly used methods are: sand filtration, activated carbon adsorption, flotation, coagulation sedimentation, etc. The characteristics of this process are: using hollow fiber ultrafilter for treatment, advanced technology, compact structure, less land occupation, intermittent operation of the system and simple management.
3. Biological treatment
It is suitable for sewage with high organic content. Biological treatment methods such as activated sludge process, contact oxidation process and biological turntable are generally used. It can be used alone or combined with several biological treatment methods, such as contact oxidation + biofilter; biofilter + activity
Carbon adsorption; rotary table ten sand filtration process. This process has the advantages of strong adaptability to hydraulic load variation, less sludge production and easy maintenance and management.
Reclaimed water is to reuse the high-quality miscellaneous drainage (excluding feces and kitchen drainage), miscellaneous drainage (excluding fecal sewage) and domestic sewage (waste) water that people have used in life and production after collecting and recycling, which can be used as miscellaneous water for floor cleaning, flower watering, car washing, air conditioning cooling, toilet flushing, fire control, etc. Because its water quality index is lower than the drinking water quality standard of urban water supply, but higher than the discharge standard of sewage allowed to be discharged into surface water body, that is, its water quality is between the quality standard of domestic drinking water and that of allowable discharge sewage, so it is named "middle water".