Matrix composition recipe for sewage treating artificial wet land

[0014] Example 1

[0015] General domestic sewage in a park, with a water volume of 3000 tons/day, and an artificial wetland covering an area of ​​5,040m 2. Sewage enters the constructed wetland after "biochemically enhanced flocculation" pretreatment. The composition of the constructed wetland matrix composition from top to bottom is as follows: sand and soil mixture with a volume ratio of 1:1, with a height of 10cm; gravel, with a height of 40cm; coarse sand, its height is 10cm; gravel, its height is 20cm. After passing through the constructed wetland, the water quality reaches the first level B standard in the "Emission Standard of Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002).

[0016] Example 2

[0017] High-concentration ammonia nitrogen domestic sewage in a commercial office building, with a water volume of 250 tons per day, and a constructed wetland covering an area of ​​980m 2. Sewage enters the constructed wetland after "biochemically enhanced flocculation" pretreatment. The matrix composition formula of constructed wetland is from top to bottom: sandy soil mixture with a volume ratio of 1:1, with a height of 10cm; coal slag, with a height of 30cm ; Zeolite, its height is 10cm; coarse sand, its height is 10cm; gravel, its height is 20cm. After passing through the constructed wetland, the water quality reaches the first level B standard in the "Emission Standard of Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002).

[0018] Example 3

[0019] A factory has high-concentration phosphorus-containing domestic sewage, with a water volume of 400 tons/day, and a constructed wetland covering an area of ​​1,560m 2. After pretreatment of "biochemical enhanced flocculation", it enters the constructed wetland. The matrix composition formula of the constructed wetland is from top to bottom: sand and soil mixture with a volume ratio of 1:1, with a height of 10cm; blast furnace slag, with a height of 15cm ; Limestone, its height is 25cm; coarse sand, its height is 10cm; gravel, its height is 20cm. After passing through the constructed wetland, the water quality reaches the first level B standard in the "Emission Standard of Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002).