CN101508481A

CN101508481A - Wetland stuffing used in method for sewage treatment with artificial wetland

Info

Publication number: CN101508481A
Application number: CNA2008101419604A
Authority: CN
Inventors: 彭立新; 雷志洪; 谷理明; 刘志刚; 陆武
Original assignee: SHENZHEN BIYUAN ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY Co Ltd; SHENZHEN ACADEMY OF ENVIRONMENTAL SCIENCE
Current assignee: SHENZHEN BIYUAN ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY Co Ltd; SHENZHEN ACADEMY OF ENVIRONMENTAL SCIENCE
Priority date: 2008-08-22
Filing date: 2008-08-22
Publication date: 2009-08-19
Anticipated expiration: 2028-08-22
Also published as: CN101508481B

Abstract

The invention provides a wetland filler used in a method for treating sewage by utilizing artificial wetland, which overcomes the defects existing in the wetland filler mainly containing sandstone that the area of the artificial wetland is large, the wetland filler and aquatic plants and hygrophytes grown in the wetland filler can only remove pollutants in the sewage in low efficiency, particularly phosphorus, the quantity of microbes carried in the wetland filler is low, the root systems of the aquatic plants and hygrophytes grown in the wetland filler can only absorb phosphorus in low efficiency, and the like. The wetland filler of the invention is formed by oyster shells, hearth accretion of volcanic ash and swelling agent and active carbon, and has the advantages of having wide material source and low cost, improving the efficiency of removing the pollutants in the sewage and increasing the quantity of microbes carried in the wetland filler. The Shenzhen Guanlan river sewage deep treatment project and the Wuyi mountain town sewage artificial wetland treatment project in which the wetland filler of the invention is used prove that the area of the artificial wetland is reduced by more than 20 percent, and the pollution load of the wetland is greatly improved.

Description

A kind of artificial swamp that utilizes carries out the wet land filler that uses in the sewage water treatment method

Affiliated technical field

The present invention relates to the filler that treatment tank in the environment-friendly engineering uses, particularly a kind of wet land filler that utilizes contaminant removal efficiency in the improved sewage that artificial swamp carries out using in the sewage water treatment method.

Background technology

Utilizing efficient vertical current constructed wetland technology to carry out sewage disposal now is widely used, the applicant is in Chinese patent literature, disclosing a kind of patent No. is 00114693, name is called the patent of invention of a kind of sewage water treatment method and device, in the technical scheme of this patent disclosure, what wet land filler adopted is, sandstone is main wet land filler, sandstone is that the main drawback of master's wet land filler is, the artificial swamp area is big, aquatic and the humidogene of implanting on wet land filler and the wet land filler is planted contaminant removal efficiency in the sewage low, particularly the clearance of phosphorus is low, microbial biomass is few on the wet land filler carrier, and the aquatic and hygrophyte root system of implanting on the wet land filler is to shortcoming such as the assimilated efficiency of phosphorus is low.

Goal of the invention

Utilize efficient vertical current constructed wetland technology to carry out in the sewage water treatment method for overcoming, sandstone is that contaminant removal efficiency is low in the sewage that brings of main wet land filler, particularly the clearance of phosphorus is low, microbial biomass is few on the sandstone carrier, aquatic and the hygrophyte root system of implanting on the sandstone is to technical deficiency such as the assimilated efficiency of phosphorus is low, the invention provides a kind of wet land filler, be used to overcome the deficiencies in the prior art.

The present invention realizes that the technical scheme that goal of the invention adopts is, the wet land filler that adds in the artificial swamp treatment tank adds the swelling agent agglomerate by oyster shells, volcanic ash and gac constitutes, ash adds the weight part ratio of swelling agent agglomerate and gac and is on described oyster shells, the fire: oyster shells is: 35%, volcanic ash adds the swelling agent agglomerate: 50%, and gac is: 15%.

The invention has the beneficial effects as follows, raw material sources are extensive, with low cost, improved contaminant removal efficiency in the sewage, increased microbial biomass on the wet land filler carrier, the embodiment of the invention facts have proved that in river, Guanlan, Shenzhen advanced treatment of wastewater engineering and Wuyi Mountain town sewage artificial swamp treatment project the area that can reduce artificial swamp improves the wetland pollution load simultaneously more than 20% greatly.

Embodiment

A kind of artificial swamp that utilizes carries out the wet land filler that uses in the sewage water treatment method, this sewage water treatment method is provided with the artificial swamp treatment tank, in the artificial swamp treatment tank, add sandstone and wet land filler, on sandstone and wet land filler, implant aquatic and hygrophyte, the wet land filler that adds in the artificial swamp treatment tank is by oyster shells, volcanic ash adds the swelling agent agglomerate and gac constitutes, oyster shells, ash adds the weight part ratio of swelling agent agglomerate and gac and is on the fire: oyster shells is: 30-40 part volcanic ash adds the swelling agent agglomerate and is: 45-55 part, gac is: 10-20 part.

During use, with oyster shells, volcanic ash add swelling agent agglomerate and gac constitute mix after, fill out at wetland plants on surface well developed root system position, generally press wetland area interpolation 15kg/m2, reach more satisfactory effect.

Oyster shells is a kind of natural biological calcium material, broken back (sheet size 5 ~ 15mm) have specific surface area big, be easy to attached growth of microorganisms, utilize phosphate anion in calcium ion and the sewage to carry out the basicity that chemical exchange and raising sewage carry out nitration reaction simultaneously.

Volcanic ash adds the porous material behind the swelling agent sintering, is made into the standard material of 6 ~ 10mm particle diameter.Be characterized in having very big specific surface area and (reach 120m ²More than/the g), that improves microorganism adheres to density and adsorption efficiency to pollutent, the active silica, activated alumina, active calcium oxide isoreactivity component and the phosphate radical that utilize volcanic ash to exist some amount carry out ion-exchange and chemical reaction, make enriching pollutants improve the assimilation effect of plant to pollutent in the root system of plant developed region.

Gac generally forms with timber, coconut husk, the dry distillation of coal, is characterized in having very big specific surface area and good adsorption performance, and its specific surface area reaches 500 ~ 1500m ²/ g, the absorption iodine number is more than 800.That improves microorganism adheres to density and adsorption efficiency to pollutent, makes enriching pollutants improve the assimilation effect of plant to pollutent in the root system of plant developed region.

Of the present inventionly carry out in the sewage disposal, the mechanism of action of pollutent comprised microbial reaction, physical-chemical reaction and by phytosynthesis etc., reaction formula is as follows at worker's wetland:

In the wet land filler most preferred embodiment that the present invention relates to

For by weight: oyster shells is: 35 parts, volcanic ash adds the swelling agent agglomerate and is: 50 parts, gac is: 15 parts.

Oyster shells is broken into the fragment that the length of side is 5-15mm.

It is that particle diameter is the 6-10mm agglomerate that volcanic ash adds the swelling agent agglomerate.

Claims

1, a kind of artificial swamp that utilizes carries out the wet land filler that uses in the sewage water treatment method, this sewage water treatment method is provided with the artificial swamp treatment tank, in the artificial swamp treatment tank, add sandstone and wet land filler, on sandstone and wet land filler, implant aquatic and hygrophyte, be characterised in that:

The wet land filler that adds in A, the described artificial swamp treatment tank adds the swelling agent agglomerate by oyster shells, volcanic ash and gac constitutes;

Ash adds the weight part ratio of swelling agent agglomerate and gac and is on B, described oyster shells, the fire: oyster shells is: 30-40 part, volcanic ash add the swelling agent agglomerate and is: 45-55 part, gac is: 10-20 part.

2, a kind of artificial swamp that utilizes according to claim 1 carries out the wet land filler that uses in the sewage water treatment method, be characterised in that: ash adds the weight part ratio of swelling agent agglomerate and gac and is on described oyster shells, the fire: oyster shells is: 35 parts, volcanic ash adds the swelling agent agglomerate: 50 parts, gac is: 15 parts.

3, a kind of artificial swamp that utilizes according to claim 1 and 2 carries out the wet land filler that uses in the sewage water treatment method, and be characterised in that: described oyster shells is broken into the fragment that the length of side is 5-15mm.

4, a kind of artificial swamp that utilizes according to claim 1 and 2 carries out the wet land filler that uses in the sewage water treatment method, is characterised in that: it is that particle diameter is the 6-10mm agglomerate that described volcanic ash adds the swelling agent agglomerate.