Due to excessive groundwater exploitation, water resource pollution has brought a crisis to people's water safety, and the emergence of reclaimed water reuse technology has gradually alleviated the sense of crisis. Reuse of reclaimed water refers to the deep treatment of domestic sewage, industrial sewage, etc., to remove all toxic and harmful pollutants such as impurities and viruses, meet relevant standards, and be used for non drinking water sources such as land irrigation and green space sprinkling.

The concept of reclaimed water reuse

The reuse of reclaimed water is an important way to solve the crisis of urban water resources and the fundamental way to coordinate urban water resources and water environment. The treatment and reuse of domestic sewage can not only reduce the exploitation of groundwater, but also bring us certain economic benefits. Intermediate water refers to non drinking water that has been treated and meets the specified water quality standards, and can be used interchangeably in areas such as daily life, municipal administration, and the environment. Because its water quality index is lower than the water quality standard for drinking water, but higher than the water quality standard for sewage discharge, it is in between the two, so it is called "reclaimed water".

Technical characteristics of reclaimed water reuse equipment

(1) Capable of solid-liquid separation, separating suspended substances, colloidal substances, and microbial communities lost from biological units in wastewater from purified water. The separation process is simple, occupies a small area, has good effluent quality, and generally does not require tertiary treatment for reuse.

(2) It can maintain a high concentration of biomass in the biological treatment unit, greatly increase the volumetric load, and at the same time, the membrane separation performance greatly shortens the hydraulic retention time of the treatment unit, and correspondingly reduces the footprint of the bioreactor.

(3) Due to its ability to prevent the loss of various microbial communities, it is beneficial for the slow growth rate (nitrification, etc.), thereby facilitating the smooth progress of various metabolic processes in the system.

(4) Making the residence time of some large molecules difficult to degrade organic compounds longer is beneficial for their decomposition.

(5) Membrane treatment technology, like other filtration and separation technologies, can slow down the decrease in membrane flux and maintain the effective service life of the MBR system over a long period of operation due to membrane blockage as a filtering medium, and the gradual decrease in the amount of water passing through the membrane during operation. Effective backwashing and chemical cleaning can also slow down the decrease in membrane flux and maintain the effective service life of the MBR system.

(6) MBR technology has been successfully applied in urban sewage treatment projects in Shanghai due to its simple process, convenient operation, and ability to achieve fully automatic operation and management.

The effluent quality of the reclaimed water reuse equipment is excellent, and it is widely used in non drinking water places such as flushing toilets, car washing, and ornamental water. It fully utilizes water resources and reduces environmental pollution, thus forming the hottest water treatment technology today.