Eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate

A technology of artificial wetland and eutrophication, applied in the field of water treatment, can solve the problems of effluent pH rise and retention, etc., and achieve the effects of enhancing impact resistance, reducing land area, and good stress resistance

Inactive Publication Date: 2009-08-26
TONGJI UNIV +1
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Problems solved by technology

However, the current relevant research is still in the simulation test of the laboratory, and the case of applying steel slag and dry slag to the actual restoration project of polluted water body has not been reported yet.
In addition, according to our current research at Qianwei Experimental

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  • Eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate

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Effect test

Embodiment 1

[0023] The test device consists of two sets of horizontal subsurface flow wetland systems A and B, and the artificial wetland pool body 1 is welded by PVC plastic plates. Constructed wetland pool body 1 has a volume of 0.64m 3 (2.0m×0.4m×0.8m), each end has a gravel water distribution area 5 and a gravel outlet area 7 with a length of 15cm and 25cm respectively, and 9 sampling ports are arranged on the side of the device. The matrix layer 2 is made of mixed steel slag and dry slag with a particle size of 5-15 mm, the volume ratio of steel slag and dry slag is 4:1, and the filling thickness is 55 cm. The upper layer is covered with crushed stones of 5-8 mm as the covering layer 3 . Constructed wetland system A planted a single wetland plant Typha angustifolia as wetland plant system 4; constructed wetland system B adopted the mixed planting mode of typha (Typha angustifolia) and windmill grass (Cyperous alternifolius) as wetland plant system 4. The planting density of the two...

Embodiment 2

[0026] Experimental site: Water environment restoration experimental base in Qianwei Village, a certain county.

[0027] Treatment object: Qianwei village landscape water body (central lake). Due to the rapid development of local farmhouse tourism and the absence of sewage treatment facilities, a large amount of domestic sewage is directly discharged into the water body without treatment, resulting in a heavy nutrition state in the central lake. In particular, the content of organic matter and total phosphorus in the water body is relatively high.

[0028] Construction of the constructed wetland treatment system: The constructed wetland pool body 1 is transformed from an abandoned greenhouse fish pond (brick-concrete structure). The length and width of the constructed wetland pool body 1 are 50m×8.5m respectively. The horizontal subsurface flow constructed wetlands (HFs) were used to construct the model. The steel slag and dry slag with a particle size of 5-15 mm are soaked ...

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Abstract

The invention belongs to the environmental protection technical field, in particular to an eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate. The system adopts a horizontal subsurface flow artificial wetland mode and comprises an artificial wetland cell body, a substrate layer, a wetland botanical system and a water distribution system. The water distribution system comprises water distribution pipes, a gravel water distribution region, a gravel exhalant region and a water outlet channel. The substrate layer is arranged in the artificial wetland cell body. Two sides of the substrate layer are respectively the gravel water distribution region and the gravel exhalant region. The upper part of the substrate layer is paved with a covering layer. The surface of the covering layer is a wetland botanical system. One side of the gravel water distribution region is provided with the water distribution pipes. The gravel exhalant region is connected with the water outlet channel. The matrix material of the substrate layer adopts the mixture of steel slag and dry residue, the volume ratio of which is 4:4-6:1. The processing system is particularly suitable for the purification and restoration of water body with high turbidity, high N and P eutrophication in villages and small towns. Experiments prove that after contaminated cultivation and landscape water body is treated by the processing system; effluent quality basically meets the water standard of national surface water grade III, and even meets the water standard of national surface water grade II in some months; the removal rates of the TP and SS are both more than 90%; the removal rate of NH4-N is also more than 80%.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an artificial wetland treatment system for eutrophic water bodies using steelmaking waste slag as a matrix. Background technique [0002] Constructed Wetlands (CWs) have been widely valued by countries all over the world because of their advantages such as good treatment effect, low construction and operation costs, and easy maintenance and management. As a new type of ecological restoration technology for polluted water bodies, it has been widely used in the treatment of eutrophic water bodies. The processing technology is also becoming more and more mature. At present, there are a large number of patent applications and authorizations in this area. Substrate (filler) is an important part of constructed wetland, which provides a growth environment for wetland plants and microorganisms, and also participates in the physical and chemical process of sewage puri...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
CPCY02W10/10
Inventor 杨长明李建华刘建生顾文飞马锐
Owner TONGJI UNIV
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