Non-conventional water resource uses include

Unconventional water resources utilization includes the following:

Encourage and support the collection, development, and utilization of unconventional water sources such as rainwater, brackish water, recycled water, and mine water, and incorporate them into the unified allocation of water resources. Unconventional water sources such as recycled water and rainwater should be given priority for use in industrial production, urban greening, road cleaning, vehicle washing, building construction and ecological landscapes.

Unconventional water sources refer to (conventional) water resources that are different from surface water and groundwater in the traditional sense. They mainly include rainwater, recycled water (sewage and wastewater after regeneration treatment), seawater, aerial water, mine water, brackish water, etc. The characteristic of these water sources is that they can be recycled and reused after treatment.

The development and utilization of various unconventional water sources have their own characteristics and advantages, which can replace conventional water resources to a certain extent, accelerate and improve the recycling process of natural water resources, and make limited water resources more effective.

Unconventional water resources play an important role in increasing water supply, reducing pollution emissions, improving water utilization, and transforming from disaster to resource. This article introduces the current application status and reuse methods of three unconventional water sources at home and abroad: recycled water, desalinated water, and rainwater, and proposes countermeasures and suggestions for current problems in our country.

Recycled water:

Reclaimed water (foreign name: Reclaimed water) refers to water that after appropriate treatment of wastewater or rainwater reaches certain water quality indicators, meets certain usage requirements, and can be used beneficially.

Reclaimed water has obvious advantages over seawater desalination and inter-basin water diversion. From an economic point of view, the cost of recycled water is the lowest. From an environmental point of view, sewage recycling can help improve the ecological environment and achieve a virtuous cycle of water ecology.

Reclaimed water is also water treated by sewage treatment plants that meets the standards. It is generally a secondary treatment. It has the advantages of not being affected by climate, not competing with neighboring areas for water, available locally, stable and reliable, and with a high guarantee rate. Reclaimed water is the so-called "reclaimed water", which follows the Japanese name. Usually people call tap water "upper water" and sewage "sewage".

The quality of recycled water is between that of upper water and sewage, hence the name "reclaimed water." Although recycled water is not drinkable, it can be used in some situations where water quality is not high, such as flushing toilets, flushing cars, spraying roads, greening, etc. Reclaimed water engineering technology can be considered as a miscellaneous water supply technology between the building's domestic water supply system and the drainage system.

The water quality index of recycled water is lower than the drinking water quality index of urban water supply, but higher than the discharge standard of polluted water allowed to be discharged into surface water bodies.