The term "reclaimed water" is relative to inflow [water supply and drainage] and drainage [drainage]. The technical aspect of reclaimed water reuse refers to the centralized transportation of daily household waste water (such as showers, bathrooms, laundry, restaurants, kitchens, and bathrooms) in residential communities, and achieving a certain level of standardized reuse for landscaping irrigation, vehicle flushing, road flushing, and toilet flushing in residential communities, thereby achieving the goal of saving water resources.

System classification:

According to the scope, size, and scale of supply, there are generally four categories of reclaimed water recycling systems:

1、 Sound drainage facilities:

The water source in this system comes from miscellaneous tap water and high-quality miscellaneous drainage within the system. After the drainage is collected and resolved, it is used for flushing toilets, cleaning vehicles, landscaping, etc. inside the engineering building. The solution facilities should be located inside or adjacent to the outside of the building according to the standard. The water treatment equipment in Beijing New Wanshou Hotel is located in the basement of the villa.

2、 Inadequate drainage facilities:

In areas with imperfect drainage management systems in large cities, their sewage treatment facilities cannot meet the secondary solution standards. According to the reuse of reclaimed water, it can alleviate the pollution of wastewater to the local river environment. The water source in this system comes from the tough drainage and purification treatment tanks (such as sand settling tanks, fiberglass septic tanks, oil removal tanks, etc.) of the project building, and the water in this tank is the total domestic sewage treatment. The system solves the problem that facilities can be installed in rooms or outdoors according to standards.

3、 Small area ancient architectural complex:

The reclaimed water source of this system comes from the miscellaneous drainage caused by various buildings within the engineering construction area. This type of system can be used for engineering construction of residential communities, colleges, and their government organizations. Its solution facilities are located within a small area.

4、 Regional ancient architectural complexes:

The characteristic of this system is that small areas have secondary wastewater treatment facilities, and the water source in the area can be treated by large city sewage treatment stations or chemical wastewater can be used. This type of water can be transported by ship to the regional wastewater treatment station, and after further deep treatment, it can be used for flushing toilets, landscaping, and other main purposes in engineering buildings.

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