In terms of the overall development situation, it is a water-saving method. China is developing rapidly in all aspects, but it is difficult to make full use of the entire water resources. Therefore, the scientific and rational utilization of water resources has become an important part of the national resource strategy. Water conservation has become a consensus across the country, and the reuse of reclaimed water from sewage is particularly important.
The word "water of reclaimed water" is in contrast to upstream water (supply water) and water (drainage water). Wastewater reclaimed water reuse technology refers to the biological contact oxidation of domestic sewage (from bathing, toilets, laundries, kitchens, and bathrooms) to meet certain standards for green irrigation, car washing, road cleaning, and household toilet washing, thereby achieving the goal of water conservation. The main purposes of reusing reclaimed water from sewage are as follows:
Beautification includes greening, river replenishment, park toilets and washing and rinsing water for park roads.
- In coordination with the comprehensive urban environmental management, such as water usage for reclaimed water dust removal, etc.
- Community water supply, including flushing, greening, fire protection, etc. ..
- Water for washing the car.
- Industrial cooling water.
- Others include aquaculture, train and ship washing, and other water.
Advantages of reclaimed water reuse technology in sewage
- This process adopts a biological treatment process with high volumetric loading and low sludge loading. Microorganisms convert organic matter and harmful pollution into nitrogen oxides, substances, heat and water in the air. Therefore, the amount of sludge is small, reducing management costs.
- The long-term sludge age of this system is conducive to the interception, growth and reproduction of nitrifying bacteria, and the diffusion is slow. The nitrification efficiency of the system has been improved, and the control of the operation mode also has the functions of denitrification and phosphorus removal.
- The recycling and reuse device is equipped with a reuse system, which is used for watering flowers and plants, flushing toilets in tree-like structures, etc., thus saving tap water resources.
- This device is controlled by a microcomputer biological processing system and can operate automatically.
- Systems that occupy a small area can be constructed by burial.
Benefit Analysis of Reclaimed Water Reuse in Sewage
The reuse of reclaimed water has obvious economic, social and environmental benefits.
- It has provided a new water source. The reuse of reclaimed water from sewage has no impact on human health, providing a very economical water source for society and reducing the huge engineering investment required for long-distance water diversion.
- Reduce emissions. Through recycling, the discharge of sewage can be reduced, pollution to the environment can be decreased, and the volume of sewage treatment can be lowered.
- It has reduced the consumption of fresh tap water, and accordingly decreased the investment in urban tap water treatment facilities.
With the improvement of the greening degree in residential areas, the water consumption for lawns, green plants, water features, car washing, etc. has also increased accordingly. To save water, relevant ministries and local governments have required that water reuse facilities must be built in residential areas in the future. The water in the community is mainly used for picking up cars, spraying green Spaces and flushing toilets. The adoption of renewable water systems in urban residential areas can not only reduce pollution but also increase the supply of water resources, especially bringing obvious economic, social and environmental benefits.
This method is adopted in all residential areas of the city. It not only has a large processing capacity but also shows obvious treatment effects. The continuous expansion of urban residential areas and the development of water treatment technologies will significantly reduce the initial investment and operating costs of reclaimed water reuse systems. Thirdly, the commercialization of residential properties and the standardization of residential property management have laid the foundation for the return on investment of the reclaimed water system from sewage. The introduction of the reclaimed water reuse system for urban property communities is not only a highlight in real estate sales but also enhances the environmental protection level of the communities themselves and improves the quality of life for residents.
