CN105540857A - Coal gangue and automatic modified zeolite composite filler artificial wetland system - Google Patents

Coal gangue and automatic modified zeolite composite filler artificial wetland system Download PDF

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Publication number
CN105540857A
CN105540857A CN201610003391.1A CN201610003391A CN105540857A CN 105540857 A CN105540857 A CN 105540857A CN 201610003391 A CN201610003391 A CN 201610003391A CN 105540857 A CN105540857 A CN 105540857A
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China
Prior art keywords
zeolite
coal gangue
filler
gravel
thickness
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CN201610003391.1A
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CN105540857B (en
Inventor
张荣新
傅金祥
王国强
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Liaoning Province Urban and Rural Construction Planning and Design Institute Co., Ltd.
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Shenyang Jianzhu University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cultivation Of Plants (AREA)

Abstract

The invention relates to a coal gangue and automatic modified zeolite composite filler artificial wetland system. Artificial wetland composite filler containing coal gangue, zeolite and gravel filler is adopted, the thickness of the filler layer is 1.0 m or more, and the filler sequentially comprises planting soil, coal gangue, zeolite, gravel and a geomembrane. The pH value index of coal gangue filler layer filtered water is controlled by adjusting retention time and flow speed of sewage in the coal gangue filler layer on different water quality conditions, weak-acid filtrate directly acts on a lower zeolite filler layer, zeolite filter can be modified automatically, and the pollutant removal effect of the zeolite filler layer is effectively improved. A large-particle-diameter reverse grading filler technology is adopted, while surface layer filler blocking is effectively relieved, the capacity for treating and containing pollutants in the sewage of the modified zeolite layer is improved, the anti-blocking period of an artificial wetland is prolonged, and the use ratio of coal gangue is increased.

Description

A kind of coal gangue-modified zeolite compounded mix artificial wet land system automatically
Technical field
The present invention relates to a kind of coal gangue-modified zeolite compounded mix artificial wet land system automatically, this system while alleviation drowned flow artificial wet land packing layer blockage problem, can realize the recycling to coal gangue.
Background technology
Artificial Wetland Techniques, because its Construction and operation expense is lower, manage the advantages such as simple and easy, has been widely used in all kinds of sewage disposal and river channel ecology regulation project at present, and has achieved good operating performance.But artificial swamp is found by operation for many years, its wet land filler layer can progressively block with working time, cause wetland water-carrying section to reduce, the process water yield reduces and the decline of wetland variation usefulness, the blockage problem of current wetland filler has become restriction Artificial Wetland Techniques in one of China's application and the principal element promoted.
The especially modified zeolite of zeolite has been widely used in all kinds of water treatment project because of its good porous physical structure, but because of its higher construction costs with prefabricated modified technique is complicated etc. that problem there is no method at present applies widely in artificial swamp.Coal gangue is as the by product in progress of coal mining, except a small amount of for except generating, brickmaking, a large amount of coal gangue is thrown aside in field, and it not only takies a large amount of soil, under the multifactor actings in conjunction such as rainfall, oozes out a large amount of acid waste water simultaneously cause secondary pollution to surrounding enviroment.
Summary of the invention
For the technical problem of above-mentioned existence, the invention provides a kind of coal gangue-modified zeolite compounded mix artificial wet land system automatically, be applicable to vertical or composite under-current artificial wetland packing layer.
The technical solution used in the present invention is:
A kind of coal gangue of the present invention-modified zeolite compounded mix artificial wet land system automatically, adopt the artificial swamp compounded mix comprising coal gangue, zeolite and gravel filling, its packing layer thickness is not less than 1.0m, and filler is followed successively by planting soil, coal gangue, zeolite, gravel, geomembrane from top to bottom.
Further, described packing material size is respectively coal gangue 8-20mm, zeolite 5-10mm, gravel 10-25mm.
Further, described coal gangue, zeolite, gravel filtrate non-homogeneous coefficient K80 are 1.3-1.6.
Further, described planting soil thickness is 15cm, and bastard coal rock layers, zeolite layer, gravel bed thickness are different according to water inlet concentration of suspension (SS), and adjustment thickness and hydraulic load are specific as follows:
As artificial swamp influent concentration SS≤20mg/L, coal gangue depth of packing is not less than 15cm, and zeolite filler thickness is not less than 20cm, and remaining is gravel bed, and hydraulic load is 0.4-0.5m 3/ ㎡ .d;
When artificial swamp influent concentration SS is 20-30mg/L, coal gangue depth of packing is not less than 25cm, and zeolite filler thickness is not less than 25cm, and all the other are gravel bed, and hydraulic load is 0.3-0.4m 3/ ㎡ .d;
As artificial swamp influent concentration SS > 30mg/L, sewage through sand setting pre-treatment, should ensure current wetland water inlet SS≤30mg/L before entering artificial swamp.
Performance of Constructed Wetlands Substrates layer is not less than 1m, is followed successively by planting soil from top to bottom, gravel and geomembrane that zeolite that the coal gangue of 8-20mm, particle diameter are 5-10mm, particle diameter are 10-25mm.Filtrate nonuniformity coefficient K at different levels 80control at 1.3-1.6.Current wetland top layer planting soil thickness is 15cm, and according to the difference of artificial swamp water inlet SS concentration, as artificial swamp water inlet SS concentration≤20mg/L, hydraulic load is 0.4-0.5m 3/ ㎡ .d, coal gangue depth of packing is not less than 15cm, and zeolite filler thickness is not less than 20cm, and all the other are gravel bed; When artificial swamp water inlet SS concentration is 20-30mg/L, hydraulic load is 0.3-0.4m 3/ ㎡ .d, coal gangue depth of packing is not less than 25cm, and zeolite filler thickness is not less than 25cm, and all the other are gravel bed; Sewage through sand setting pre-treatment, should ensure current wetland water inlet SS≤30mg/L before entering artificial swamp.
Beneficial effect of the present invention is:
1. the present invention is by regulating residence time in coal gangue packing layer of sewage under different quality condition and flow velocity, realize the control to water pH value index after the metafiltration of coal gangue filler, slightly acidic filtrate directly acts on lower floor's zeolite filler layer, automatically the modification to zeolite filler can be realized, effectively improving zeolite filler layer to pollutant removal and water environment capacity, reduce blocking speed and the zeolite layer amount of filler of artificial swamp, while delaying artificial swamp blocking speed, solve in original zeolite preprocessing process and need a large amount of consumption acids alkali lye, dispose the problems such as soaking technology complexity.
2. the anti-graded stuffing technology of Large stone of the present invention's employing, artificial swamp top layer filler blocking speed can slowed down, while increasing the effective treating depth of packing layer, control water inlet bastard coal rock layers the residence time, improve water inlet in the residence time of zeolite layer, while realizing the abundant modification of zeolite layer, reducing the risk that bastard coal rock layers leaches hydrogen ion leakage.
3. the present invention has given full play to the characteristic of coal gangue release hydrogen ions after water soaking, decrease the zeolite in Traditional Man wet land filler and gravel consumption, reduce the engineering construction cost of artificial swamp, provide new approach and thinking for utilization of coal gangue utilizes.
Accompanying drawing explanation
Fig. 1 is filler laying figure of the present invention.
In figure: 1. planting soil, 2. coal gangue, 3. zeolite, 4. gravel, 5. geomembrane.
Embodiment
Describe the present invention below by embodiment and accompanying drawing.
Embodiment: as shown in Figure 1, a kind of coal gangue of the present invention-modified zeolite compounded mix artificial wet land system automatically, adopt the artificial swamp compounded mix comprising coal gangue, zeolite and gravel filling, its packing layer thickness is not less than 1.0m, filler be followed successively by from top to bottom planting soil 1, coal gangue 2,3, gravel 4, geomembrane 5.
Described packing material size is respectively coal gangue 8-20mm, zeolite 5-10mm, gravel 10-25mm.
Described coal gangue 2, zeolite 3, gravel 4 filtrate non-homogeneous coefficient K80 are 1.3-1.6.
Described planting soil 1 thickness is 15cm, and bastard coal rock layers, zeolite layer, gravel bed thickness are different according to water inlet concentration of suspension (SS), determine current wetland thickness and hydraulic load, specific as follows:
As artificial swamp influent concentration SS≤20mg/L, coal gangue depth of packing is not less than 15cm, and zeolite filler thickness is not less than 20cm, and remaining is gravel bed, and hydraulic load is 0.4-0.5m 3/ ㎡ .d;
When artificial swamp influent concentration SS is 20-30mg/L, coal gangue depth of packing is not less than 25cm, and zeolite filler thickness is not less than 25cm, and all the other are gravel bed, and hydraulic load is 0.3-0.4m 3/ ㎡ .d;
As artificial swamp influent concentration SS > 30mg/L, sewage through sand setting pre-treatment, should ensure current wetland water inlet SS≤30mg/L before entering artificial swamp.
In filler process of deployment, require that each layer filler is clean, size is even, layer-built cables installation.

Claims (4)

1. coal gangue-modified zeolite compounded mix artificial wet land system automatically, it is characterized in that: adopt the artificial swamp compounded mix comprising coal gangue, zeolite and gravel filling, its packing layer thickness is not less than 1.0m, and filler is followed successively by planting soil, coal gangue, zeolite, gravel, geomembrane from top to bottom.
2. coal gangue according to claim 1-modified zeolite compounded mix artificial wet land system automatically, is characterized in that: described packing material size is respectively coal gangue 8-20mm, zeolite 5-10mm, gravel 10-25mm.
3. coal gangue according to claim 1-modified zeolite compounded mix artificial wet land system automatically, is characterized in that: described coal gangue, zeolite, gravel filtrate non-homogeneous coefficient K80 are 1.3-1.6.
4. the Performance of Constructed Wetlands Substrates thickness requirement of automatic modification according to claim 1, it is characterized in that: described planting soil thickness is 15cm, bastard coal rock layers, zeolite layer, gravel bed thickness are different according to water inlet concentration of suspension (SS), adjustment thickness and hydraulic load, specific as follows:
As artificial swamp influent concentration SS≤20mg/L, coal gangue depth of packing is not less than 15cm, and zeolite filler thickness is not less than 20cm, and remaining is gravel bed, and hydraulic load is 0.4-0.5m 3/ ㎡ .d;
When artificial swamp influent concentration SS is 20-30mg/L, coal gangue depth of packing is not less than 25cm, and zeolite filler thickness is not less than 25cm, and all the other are gravel bed, and hydraulic load is 0.3-0.4m 3/ ㎡ .d;
As artificial swamp influent concentration SS > 30mg/L, sewage through sand setting pre-treatment, should ensure current wetland water inlet SS≤30mg/L before entering artificial swamp.
CN201610003391.1A 2016-01-04 2016-01-04 A kind of automatic modified zeolite compounded mix artificial wet land system of gangue Expired - Fee Related CN105540857B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252182B1 (en) * 2008-09-11 2012-08-28 University Of Central Florida Research Foundation, Inc. Subsurface upflow wetland system for nutrient and pathogen removal in wastewater treatment systems
CN103787506A (en) * 2014-01-23 2014-05-14 内蒙古科技大学 High-salinity agricultural irrigation back water and soil improvement constructed wetland substrate structure and constructing method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252182B1 (en) * 2008-09-11 2012-08-28 University Of Central Florida Research Foundation, Inc. Subsurface upflow wetland system for nutrient and pathogen removal in wastewater treatment systems
CN103787506A (en) * 2014-01-23 2014-05-14 内蒙古科技大学 High-salinity agricultural irrigation back water and soil improvement constructed wetland substrate structure and constructing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王国强等: "反级配与自改性基质用于人工湿地堵塞研究", 《辽宁化工》 *

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Effective date of registration: 20190318

Address after: 110000 No. 3, 185 Lane, Nanwuma Road, Heping District, Shenyang City, Liaoning Province

Patentee after: Liaoning Province Urban and Rural Construction Planning and Design Institute Co., Ltd.

Address before: 110168 Hunnan New Road, Hunnan New District, Shenyang, Liaoning 9

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