Apply the idea of garden design to the advanced treatment of low-pollution water, utilize regional space, maximize the use of landscape construction, use the expression of waterside landscape belts, reduce investment, and realize the treatment of surface runoff and the advanced treatment of tail water from sewage treatment plants. Focus on solving the problem of lowC/NBelow the ratioNO₃-NwithTPIn-depth treatment of problems.According to the actual local situation, the tail water of the sewage treatment plant is passed through a denitrification biological filter to absorb, utilize and ecologically treat nitrate pollutants in low-pollution water; the effluent from the filter enters the undercurrent wetland, where the remaining pollutants are degraded through the combined action of plants, microorganisms and fillers. Finally enter the water quality guarantee unit-Aquatic plant pond system, the effluent index reaches surface waterIVClass or above standards.

This project belongs to the field of ecological and environmental protection. While deeply purifying low-polluted water and reducing pollution load, it can build a wetland park to provide residents with a place to rest and entertain. It is also an important environmental education base.