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Method for improving artificial wetland sewage treatment performance by using titanium-containing blast furnace slags

A technology of artificial wetlands and blast furnace slag, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of waste of valuable resources, environmental pollution, etc., and achieve sufficient raw materials, good adsorption performance, Inexpensive effect

Active Publication Date: 2014-09-17
NANJING DONGYAO RES INST OF ARCHITECTURAL TECH CO LTD
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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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  • Method for improving artificial wetland sewage treatment performance by using titanium-containing blast furnace slags

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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] like 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 anti-s...

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Abstract

The invention discloses a method for improving an artificial wetland sewage treatment performance by using titanium-containing blast furnace slags. An artificial wetland sewage treatment system adopts a horizontal subsurface flow artificial wetland mode, and comprises a soil layer, a substrate layer, wetland plants and a water distribution system, wherein the soil layer is mixed with titanium-containing blast furnace slag powder, and titanium-containing blast furnace slag fragments for photo-catalysis are embedded into the surface of the soil layer; a material of the substrate layer is the titanium-containing blast furnace slags; the water distribution system comprises crushed stone water distribution areas, crushed stone water collection areas and a water collection pipe; the crushed stone water distribution areas and the crushed stone water collection areas are respectively arranged on two sides of the soil layer and the substrate layer; and the water collection pipe is arranged on the crushed stone water collection area. The method disclosed by the invention has the advantages that (1) the method is simple in process and easy in implementation; (2) the method is sufficient in raw material and low in price, and has a special photo-catalytic effect; (3) the method can be used for reasonably and effectively solving the problems of valuable resource waste and environmental pollution caused by stacked titanium-containing blast furnace slags and extensive applications.

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 Applications(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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