What is reclaimed water?

The term "reclaimed water" is relative to water supply and drainage. The technology of reclaimed water reuse refers to the centralized treatment of household waste water (such as bathing, washing, laundry, kitchen, and toilet) in residential areas, which is then reused to a certain standard for green irrigation, vehicle flushing, road flushing, and household toilet flushing, in order to achieve the goal of water conservation.

Wastewater reuse is usually confused with reclaimed water reuse, but there are differences. Wastewater reuse refers to the reuse of industrial wastewater through the UF+RO process on the production line, with a recycling rate of relatively less than 75%. It is not used for greening irrigation, vehicle flushing, road flushing, household toilet flushing, etc.

Reuse water: Both of the above can be referred to as reuse water, but generally manufacturers will combine them to improve the recovery rate.

Reclaimed water reuse refers to the deep technical treatment of domestic sewage (or urban sewage) or industrial wastewater to remove various impurities, toxic and harmful substances and certain heavy metal ions that pollute water bodies, and then disinfect and sterilize them. The water body is colorless, odorless, and the water quality is clear and transparent, and meets or exceeds the national standards for miscellaneous water use (or relevant regulations). It is widely used in enterprise production or residential life. Suitable for watering green spaces, cleaning sanitation, flushing roads, stations, platforms, warehouses, landscape water, fire supply water, water cooling circulating supplement water, flushing water for vehicles, etc. in hotels, restaurants, residential areas, apartment buildings, schools, hospitals, factory areas, government agencies, and other units.

Reclaimed water sources are divided into high-quality miscellaneous drainage and sewage treatment. Reclaimed water sources are generally not a single source, and there are mostly three combination methods:

1) Toilet drainage, shower drainage, and circulating cooling water are called high-quality miscellaneous drainage and should be prioritized for selection;

2) The domestic drainage other than flushing drainage is called miscellaneous drainage;

3) Wastewater treatment, also known as the collective term for all domestic drainage, has the worst water quality.

Reuse of reclaimed water refers to the use of various types of drainage, such as domestic drainage, cooling water, and rainwater, in civil buildings or residential areas, after appropriate treatment, for reuse as miscellaneous water supply systems. Setting up reclaimed water reuse can effectively utilize and save limited and valuable freshwater resources, reduce pollution and wastewater discharge, reduce water environment pollution, and alleviate the overload phenomenon of urban sewage. It has significant social, environmental, and economic benefits.

The optimal treatment process for reclaimed water reuse is determined based on the amount of wastewater, water quality and quantity requirements for reuse, and comprehensive consideration of economic and technical parameters.