Biological treatment system for rainwater purification of sponge city

A biological treatment and sponge city technology, applied in the field of sewage treatment, can solve the problems of poor rainwater treatment technology and large area occupied by the treatment system in the sponge city, and achieve the effect of beautiful appearance, small area occupied, and increased greening

Pending Publication Date: 2018-02-16
HENAN INST OF ENG +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a biological treatment system for sponge city rainwater purification, which has the characteristics of efficient removal of pollutants, simple operation and management, and small footprint, and solves the problem of poor effect of the current sponge city rainwater treatment technology and the treatment system The problem of large footprint

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  • Biological treatment system for rainwater purification of sponge city

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Embodiment approach

[0025] As an embodiment of the present invention, the thickness of the gravel layer is 4 cm, the thickness of the composite filler is 20 cm, and the diameter of the gravel is 12-20 mm.

[0026] As an embodiment of the present invention, the composite filler is composed of slag, ceramsite, soil and sawdust organic matter, and its volume ratio is 3:3:2:1. As another embodiment of the present invention, wherein, the effective particle size of the ceramsite used is 8-15mm, the uniformity coefficient is 1.21, and the porosity is 31.1%; the effective particle size of the slag is 2-30mm, and the uniformity coefficient is 6.44, the porosity is 48.2%.

[0027] As an embodiment of the present invention, the surface of the vertical subsurface flow constructed wetland treatment unit is planted with Siberia Iris, which belongs to Siberia Iridaceae and Siberia Iridae. Excellent characteristics such as strong disease resistance.

[0028] As an embodiment of the present invention, the thick...

Embodiment 1

[0032] A biological treatment system for rainwater purification in sponge cities. The earthworm biofilter is embedded in the vertical subsurface flow constructed wetland. The treatment system includes two processing units, namely the vertical subsurface flow constructed wetland treatment unit and the embedded earthworm biofilter The pool unit, the two units share a water inlet device and a water outlet device, and a grille is arranged on the water channel before the water inlet.

[0033] In this embodiment, the matrix filler of the vertical subsurface flow constructed wetland treatment unit is a 4cm gravel layer from bottom to top, wherein the diameter of the gravel is 12-20mm, and a 20cm composite filler is laid on the gravel layer, wherein the composite filler layer It is mainly composed of slag, ceramsite, soil and sawdust organic matter, and its volume ratio is 3:3:2:1. Among them, the effective particle size of ceramsite is 8~15mm, the uniformity coefficient is 1.21, and t...

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Abstract

The invention provides a biological treatment system for rainwater purification of a sponge city. The biological treatment system comprises a vertical subsurface flow artificial wetland treatment unitand an embedded earthworm biological filtering tank unit, wherein matrix filling of the vertical subsurface flow artificial wetland treatment unit comprises a gravel layer and composite filling in sequence from bottom to top; the embedded earthworm biological filtering tank unit is arranged at the middle position of the composite filling of the vertical subsurface flow artificial wetland treatment unit; the embedded earthworm biological filtering tank unit comprises inert fiber filling and vegetable filling in sequence from top to bottom; earthworms in the embedded earthworm biological filtering tank unit are outer space No. 2 earthworms; iris sibirica is planted on surface soil of the vertical subsurface flow artificial wetland treatment unit. The purification system provided by the invention has the characteristics of capability of efficiently removing pollutants, simplicity in operation management and relatively small occupied area; the problems of current rainwater treatment of the sponge city that the technical effect is poor and the treatment system occupies a large area are solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a biological treatment system for rainwater purification in sponge cities. Background technique [0002] In recent years, waterlogging every time it rains has gradually evolved into a chronic disease in large and medium-sized cities in my country, and many cities with serious water shortages have lost 70% of rainwater in vain. It is a pity, but the concept of sponge city has perfectly solved this problem. At the same time, the treatment of the rainwater collected by the sponge city has become an urgent problem to be solved. The pollution situation of each city is different. The rainwater in cities with a good environment is relatively clean and can be used directly for secondary use. However, most cities are more polluted and the quality of rainwater is very poor. Further treatment is required to be recycled. However, people do not pay enough attention to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F2203/006C02F2103/001C02F3/34C02F3/327C02F1/286C02F1/281C02F1/001
Inventor 陈勇张敬申高镜清赵雅阁王文垅陈少华李林帅
Owner HENAN INST OF ENG
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