A method of using titanium-containing blast furnace slag to improve the sewage treatment performance of constructed wetlands

A technology for constructed wetlands and blast furnace slag, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as environmental pollution and waste of valuable resources, and achieve good adsorption performance, sufficient raw materials, Effects that are easy to implement

Active Publication Date: 2016-02-24
NANJING DONGYAO RES INST OF ARCHITECTURAL TECH CO LTD
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  • Description
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Problems solved by technology

[0009] The purpose of the present invention is to use titanium-containing blast furnace slag as the filler matrix of the constructed wetland to improve the performance of the constructed wetland, and at the same time reasonably and effectively solve the problems of waste of valuable resources and environmental pollution caused by the accumulation and extensive utilization of titanium-containing blast furnace slag

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  • A method of using titanium-containing blast furnace slag to improve the sewage treatment performance of constructed wetlands

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Embodiment Construction

[0017] The invention mainly utilizes the photocatalytic performance of perovskite in the titanium-containing blast furnace slag, the abundant elements beneficial to the growth of wetland plants in the slag, and the high adsorption performance of the titanium-containing blast furnace slag. The photocatalytic principle of perovskite can be described as follows:

[0018] CaTiO 3 +H 2 O→e - + h +

[0019] h + +H 2 O → · OH+H +

[0020] o 2 +e - → · o 2 -

[0021] · o 2 - +H + →HO 2 ·

[0022] 2HO 2 · →O 2 +H 2 o 2

[0023] h 2 o 2 +O 2 - → · OH+OH - +O 2

[0024] h + +OH - → · o

[0025] Such as figure 1 As shown, the constructed wetland sewage treatment system adopts the horizontal subsurface flow constructed wetland model, including soil-slag-powder mixed layer 2, matrix layer 7 containing titanium blast furnace slag filler, wetland plants 1, gravel distribution water area 6, and gravel catchment area 3. Water collection pipe 4 and clay a...

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Abstract

The invention discloses a method for improving sewage treatment performance of artificial wetland by using titanium-containing blast furnace slag. Its constructed wetland sewage treatment system adopts the horizontal subsurface flow constructed wetland model. The system includes soil layer, matrix layer, wetland plants and water distribution system. The soil layer is mixed with titanium-containing blast furnace slag powder, and the surface of the soil layer is embedded with photocatalytic Titanium-containing blast furnace slag fragments; the material of the matrix layer is titanium-containing blast furnace slag; the water distribution system includes a crushed stone water distribution area, a crushed stone water collection area and a water collection pipe, and the crushed stone water distribution area and gravel water collection area are respectively set in On both sides of the soil layer and matrix layer, the water collection pipes are set in the gravel water collection area. The advantages of the invention: (1) The process is simple and easy to implement; (2) The raw materials are sufficient, the price is low, and it has special photocatalytic effects; (3) It can reasonably and effectively solve the valuable resources brought about by the accumulation and extensive utilization of titanium-containing blast furnace slag Waste and environmental pollution problems.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to an artificial wetland system using titanium-containing blast furnace slag as a substrate and plant fertilizer, belonging to the field of environmental protection. Background technique [0002] As a new type of sewage treatment technology, constructed wetland has low construction cost, low operation cost and good treatment effect. It has been widely valued by various countries in recent years. Constructed wetlands are mainly composed of three parts: matrix bed, wetland plants and water body. The substrate is the most important component of the constructed wetland. It provides an attachment surface for the growth of microorganisms, a support carrier for the growth of plants, and is the reaction place for most of the physical, chemical and biological effects in the constructed wetland. The substrates commonly used in constructed wetlands are sand, gravel, fly ash, etc. These materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 刘荣叶飞贡湘君王睿郭刚徐悦清
Owner NANJING DONGYAO RES INST OF ARCHITECTURAL TECH CO LTD
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