Combined packing multistage terrace type vertical flow constructed wetland sewage treatment method
A sewage treatment method and a technology for constructed wetlands, which are applied in biological water/sewage treatment, water/sludge/sewage treatment, energy and wastewater treatment, etc., can solve problems such as ecological resources and topographical characteristics, and achieve low treatment costs and operation. Stable and improved purification efficiency
Inactive Publication Date: 2014-04-16
TONGJI UNIV
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However, these inventions mostly start from the processing objects or processing methods, and do not take into account the local ecological resources and topographic features.
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Embodiment 1
[0028] figure 1 It is a schematic diagram of the combined packing multi-stage terraced vertical flow constructed wetland sewage treatment method in Example 1 of the present invention. After the domestic sewage after the secondary biochemical treatment settles, it enters the multi-level terraced vertical flow artificial wetland composed of combined fillers. The aspect ratio of the multi-level terraced vertical flow artificial wetland is 1:1.5, 1:2 and 1:3. Yes, there are 4 levels of wetland devices running in series, and the height difference between each level can be 400mm, 600mm or 800mm. figure 2 It is a side view of a single-stage constructed wetland device; image 3 It is a top view of a single-stage constructed wetland device. The size of the first-level wetland, the second-level wetland, the third-level wetland and the fourth-level wetland is 1m×0.6m, and the height is 0.8m. The first-level wetland, the second-level wetland, the third-level wetland and the fourth-leve...
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Abstract
The invention belongs to the technical field of environmental protection and discloses a combined packing multistage terrace type vertical flow constructed wetland sewage treatment method, which comprises the following steps of: precipitating domestic sewage subjected to secondary biochemical treatment, and allowing the domestic sewage to enter a multistage terrace type vertical flow constructed wetland consisting of combined packing, so that water is purified. The method has the advantages of good treatment effect, high efficiency, high impact load resistance, stable operation, low investment cost and the like. Limits of pollutant discharge in the treated effluent reach the grade-A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002), wherein the chemical oxygen demand (COD) is less than 50mg / L, the ammonia nitrogen is less than 5mg / L, the total phosphorus is less than 0.5mg / L, and the total nitrogen is less than 15mg / L, so that the effluent can be directly discharged.
Description
technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for treating sewage in a multi-stage terraced field vertical flow constructed wetland with combined fillers. Background technique [0002] my country's small agricultural towns are mostly concentrated in the central and western mountainous and hilly areas, which are economically underdeveloped areas. Limited by the level of economic development, they often cannot bear the high construction, operation and maintenance costs of large sewage treatment plants. Due to the small population of agricultural small towns and scattered living, domestic sewage has the characteristics of scattered discharge and large fluctuations in water quality and water quantity. The existing sewage treatment methods in small agricultural towns are still mostly dispersed treatment in first-level septic tanks and then directly discharged into nearby rivers. With the development of urba...
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IPC IPC(8): C02F3/32
CPCY02W10/10Y02W10/37
Inventor 黄翔峰陆丽君刘佳冯夷尚家佳杨硕朱菡
Owner TONGJI UNIV