CN203568898U - Device for remedying nitrate pollution of underground water - Google Patents
Device for remedying nitrate pollution of underground water Download PDFInfo
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- CN203568898U CN203568898U CN201320560424.4U CN201320560424U CN203568898U CN 203568898 U CN203568898 U CN 203568898U CN 201320560424 U CN201320560424 U CN 201320560424U CN 203568898 U CN203568898 U CN 203568898U
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- water
- filter pool
- denitrification filter
- azotate pollution
- denitrification
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Abstract
The utility model discloses a device for remedying nitrate pollution of underground water. The device comprises a distributing reservoir (10) used for introducing polluted underground water, a denitrification filter tank (20) connected with the distributing reservoir (10) and used for performing denitrification treatment to underground water, and a collecting tank (30) used for collecting treated underground water. The device has a simple structure, and is high in remediation efficiency, convenient to operate and mange, and secondary pollution-free.
Description
Technical field
The utility model relates to water-treatment technology field, relates in particular to a kind of device of repairing groundwater azotate pollution.
Background technology
In recent years, the quantity discharged of industry, sanitary sewage grows with each passing day, livestock and poultry breeding industry develop rapidly and agriculture production in the amount of application of nitrogenous fertilizer constantly increase, make the natural circulation of nitrogen suffer destruction.The pollution of groundwater azotate is more and more serious.At present, the most of areas of China are subject to azotate pollution to some extent as the underground water of drinking water source, and have the trend increasing the weight of year by year, and indivedual regional concentration has surpassed 100mg/L.
Taking in too much nitrate has a lot of harm to HUMAN HEALTH, can cause methemoglobinemia, when serious, can cause hypoxia death.And the effect such as that the inferior ammonium nitrate forming in nitrate transformation process etc. also have is carcinogenic, teratogenesis and mutagenesis.Therefore the World Health Organization's regulation Nitrate In Drinking Water mass concentration (in N) is no more than 10mg/L, and Chinese < < drinking water sanitary standard > > (GB5749-2006) regulation nitrate limit value is also 10mg/L.
The technology that mainly removes of nitrate has physical method, thing denitrogenation and chemical reduction method at present.Wherein, the required expense of physical method is too high, does not have selectivity, and the transfer of nitrate pollutants has just occurred or concentrated, and does not in fact remove up hill and dale, so the method is subject to certain restrictions in application; Although biological denitrificaion method can thoroughly be reduced into nitrogen by nitrate, but still as capacity of resisting impact load is low, there is secondary pollution in the shortcoming that exists some to be difficult to overcome, and complex process is not suitable on a small scale and disperses to water treatment etc.So it is extremely urgent to seek a kind of not only safe but also reliable nitrate processing scheme.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model be to provide a kind of simple in structure, remediation efficiency is high, and do not have secondary pollution for repairing the device of groundwater azotate pollution.
The disclosed a kind of device of repairing groundwater azotate pollution of the utility model, comprises the distribution reservoir (10) for introducing azotate pollution underground water, the denitrification filter pool (20) of processing for underground water denitrification being connected with distribution reservoir (10) and the water collecting basin for the complete underground water of collection and treatment (30) being connected with denitrification filter pool (20).
Described device is also provided with for by underground water suction denitrification filter pool (20) intake pump (11) of distribution reservoir (10), described intake pump (11) is arranged in distribution reservoir (10) or is arranged between distribution reservoir (10) and denitrification filter pool (20), and the water side of described intake pump (11) is connected with the bottom water-in of denitrification filter pool (20).
In described denitrification filter pool (20), be disposed with from the bottom to top anti seepage membrane (21), supporting layer (22), packing layer (23), waterflooding layer (24).
Described anti seepage membrane (21) is HDPE anti seepage membrane, and thickness is 0.5-2.5mm.
Described supporting layer is filled with pebbles or gravel in (22), and the particle diameter of pebbles or gravel is 30-50mm, and the height of supporting layer (22) is 0.3-0.5m.
In described packing layer (23), be filled with one or more fillers in thick river sand, Dali chicken girt, magnetite, volcanized rock, zeolite, thin haydite, the particle diameter of filler is 1-5mm, and the height of packing layer is 0.8-1.5m.
The height of described waterflooding layer (24) is 0.1-0.3m.
At the bottom of the pond of described denitrification filter pool (20), be also provided with water-distributing device (25).
Described water-distributing device (25) is arranged on described supporting layer (22) bottom; Described water-distributing device (25) is responsible for and is several water distribution branch pipes that " rich " font parallel equidistant distributes and forms by water distribution, each water distribution branch pipe tiltedly upper 45 is spent even and is provided with several water distributing pores.
Wash-water pump (31) is set in described water collecting basin (30), and described wash-water pump (31) water side is connected with denitrification filter pool (20) bottom water-in.
Simple and the operational administrative of the utility model apparatus structure, non-secondary pollution.The nitrated percolating device of the reparation groundwater azotate pollution providing by the utility model is repaired underground water, and technical costs is low, nitric nitrogen removal effect is good, and effluent index is stable.
Accompanying drawing explanation
Fig. 1 is that the utility model is for repairing the structural representation of the denitrification percolating device of groundwater azotate pollution, shown in figure, label is respectively: 10, distribution reservoir, 11, intake pump, 20, denitrification filter pool, 21, anti seepage membrane, 23, packing layer, 24, waterflooding layer, 25, water-distributing device, 30, water collecting basin, 31, wash-water pump;
Fig. 2 is water-distributing device schematic diagram, and shown in figure, label is respectively: 251, water distribution supervisor, 252, water distribution branch pipe, 253, water distributing pore.
Embodiment
Below will by specific embodiment, the present invention is described in detail.
Structure of the present utility model as shown in Figure 1, comprises the distribution reservoir 10 for introducing azotate pollution underground water, the denitrification filter pool 20 of processing for underground water denitrification being connected with distribution reservoir 10 and the water collecting basin 30 for the complete underground water of collection and treatment being connected with denitrification filter pool 20.
Described device is also provided with for by the intake pump 11 of the underground water suction denitrification filter pool 20 of distribution reservoir 10, described intake pump 11 is arranged in distribution reservoir 10 or is arranged between distribution reservoir 10 and denitrification filter pool 20, and the bottom water-in of the water side of described intake pump 11 and denitrification filter pool 20 is connected.
In described denitrification filter pool 20, be disposed with from the bottom to top anti seepage membrane 21, supporting layer 22, packing layer 23, waterflooding layer 24.
Described anti seepage membrane 21 is oozed polluted underground water for preventing under sewage, is preferably HDPE anti seepage membrane, and thickness is 0.5-2.5mm.
Described supporting layer 22 is for water distribution uniformity and prevent from oozing obstruction water distributing pore under filler, is wherein filled with pebbles or gravel, and the particle diameter of pebbles or gravel is 30-50mm, and the height of supporting layer 22 is 0.3-0.5m.
In described packing layer 23, be filled with one or more fillers in thick river sand, Dali chicken girt, magnetite, volcanized rock, zeolite, thin haydite.
In denitrification filter pool 20, the selection of the particle diameter of packing layer 23 fillers is the key factor that affects denitrification filter pool 20 steady runnings.In the process of denitrification filter pool 20 steady runnings, denitrifying bacteria can adhere to and form one deck microbial film at filling surface, if the particle diameter of filler is too small, the microbial film adhering to can reduce the hole of filler, cause under the sewage of waterflooding layer 24 and ooze difficulty, device water outlet reduces, and the gas that denitrification process produces simultaneously is also difficult to permeate filtrate and discharges the water surface; But packing material size is excessive, for the specific surface area of attached growth of microorganisms can reduce, infiltration coefficient can raise greatly, and hydraulic detention time reduces, and sewage can not get effective processing.Investigator of the present utility model determines that according to previous experiments running condition the particle diameter of packing layer filler is 1-5mm, and the residence time of denitrification filter pool is 3-6h.
In denitrification filter pool 20, the height of packing layer 23 is the another one factors that affect low carbon-nitrogen ratio sewage decontamination effect improving.Generally, packing layer 23 is highly larger, and the water environment capacity of device is stronger, and hydraulic detention time is also longer, and effluent quality will be better; But packing layer 23 is higher, investment cost is also just higher.Investigator of the present utility model, according to the hydraulic surface loading of device, infiltration coefficient and the denitrifying action time of filler, determines 0.8-1.5m by the thickness of packing layer.
Described waterflooding layer 24 the inside are all water, are mainly in order to catchment, and the homogenizing effluent quality water yield is convenient to discharge, and it is highly 0.1-0.3m.
At the bottom of the pond of described denitrification filter pool 20, be also provided with water-distributing device 25, as shown in Figure 2.
Described water-distributing device 25 is arranged on described supporting layer 22 bottoms; Described water-distributing device 25 is by water distribution supervisor 251 and be and form with water distribution supervisor 251 several water distribution branch pipes 252 that " rich " font parallel equidistant distributes and forms, and each water distribution branch pipe 252 tiltedly upper 45 is spent even and is provided with several water distributing pores 253.
The interior wash-water pump 31 that arranges of described water collecting basin 30, described wash-water pump 31 water sides are connected with denitrification filter pool 20 bottom water-ins.For preventing denitrification filter pool 20 obstructions, need to adopt wash-water pump 31 regularly the filler in packing layer 23 to be rinsed, wash-down water adopts the water outlet after device is processed, and backwash rate is 1-5L/ (m
2s), flush time is 1-3min, flushing cycle 1-7d.
The working method of utilizing said apparatus to carry out denitrification processing is:
(1), the underground water of azotate pollution is introduced in distribution reservoir 10, then according to carbon-nitrogen ratio, be that 2-5:1 drops into through pretreated natural slowly-releasing carbon source, for biological denitrification process provides carbon source in distribution reservoir 10.Wherein carbon-nitrogen ratio refers to the ratio of the mass concentration of nitrogen element in the mass concentration of carbon in modified natural slowly-releasing carbon source and underground water; Pretreated method is: first through grinding, then by amylolytic enzyme, be hydrolyzed into and be easy to monose or the low sugar that microorganism utilizes.
(2), denitrification filter pool 20 initial start stage, in denitrification filter pool 20, supplement denitrification flora pregnant solution, the underground water pumping into is carried out to denitrification processing.In described denitrification filter pool 20, be disposed with from the bottom to top anti seepage membrane 21, supporting layer 22, packing layer 23, waterflooding layer 24, denitrifying bacteria can adhere to and form one deck microbial film at filling surface, under anaerobic environment, the slowly-releasing carbon source that denitrifying bacteria utilization on microbial film adds, carries out denitrification denitrogenation.The denitrification percolating device residence time is 3-6h.
(3) underground water, denitrification being disposed is introduced water collecting basin 30.
In sum; although embodiment of the present utility model have been described in detail the utility model; but persons skilled in the art should be understood that; above-described embodiment is only the description to preferred embodiment of the present utility model; but not restriction to the utility model protection domain; persons skilled in the art are in the disclosed technical scope of the utility model, and the variation that can expect easily, all within protection domain of the present utility model.
Claims (9)
1. a device of repairing groundwater azotate pollution, it is characterized in that: described device comprises the distribution reservoir (10) for introducing azotate pollution underground water, the denitrification filter pool (20) of processing for underground water denitrification being connected with distribution reservoir (10) and the water collecting basin for the complete underground water of collection and treatment (30) being connected with denitrification filter pool (20), is disposed with from the bottom to top anti seepage membrane (21), supporting layer (22), packing layer (23), waterflooding layer (24) in described denitrification filter pool (20).
2. the device of reparation groundwater azotate pollution as claimed in claim 1, it is characterized in that: be also provided with for by the intake pump (11) of the underground water suction denitrification filter pool (20) of distribution reservoir (10), described intake pump (11) is arranged in distribution reservoir (10) or is arranged between distribution reservoir (10) and denitrification filter pool (20), and the water side of described intake pump (11) is connected with the bottom water-in of denitrification filter pool (20).
3. the device of reparation groundwater azotate pollution as claimed in claim 1, is characterized in that: described anti seepage membrane (21) is HDPE anti seepage membrane, and thickness is 0.5-2.5mm.
4. the device of reparation groundwater azotate pollution as claimed in claim 1, is characterized in that: described supporting layer is filled with pebbles or gravel in (22), and the particle diameter of pebbles or gravel is 30-50mm, and the height of supporting layer (22) is 0.3-0.5m.
5. the device of reparation groundwater azotate pollution as claimed in claim 1, it is characterized in that: in described packing layer (23), be filled with one or more in thick river sand, Dali chicken girt, magnetite, volcanized rock, zeolite, vermiculite, thin haydite, the particle diameter of filler is 1-5mm, and the height of packing layer is 0.8-1.5m.
6. the device of reparation groundwater azotate pollution as claimed in claim 1, is characterized in that: the height of described waterflooding layer (24) is 0.1-0.3m.
7. the device of reparation groundwater azotate pollution as claimed in claim 1, is characterized in that: at the bottom of the pond of described denitrification filter pool (20), be also provided with water-distributing device (25).
8. the device of reparation groundwater azotate pollution as claimed in claim 7, is characterized in that: described water-distributing device (25) is arranged on described supporting layer (22) bottom; Described water-distributing device (25) is responsible for and is several water distribution branch pipes that " rich " font parallel equidistant distributes and forms by water distribution, each water distribution branch pipe tiltedly upper 45 is spent even and is provided with several water distributing pores.
9. the device of reparation groundwater azotate pollution as claimed in claim 1, is characterized in that: wash-water pump (31) is set in described water collecting basin (30), and described wash-water pump (31) water side is connected with denitrification filter pool (20) bottom water-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560424.4U CN203568898U (en) | 2013-09-09 | 2013-09-09 | Device for remedying nitrate pollution of underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560424.4U CN203568898U (en) | 2013-09-09 | 2013-09-09 | Device for remedying nitrate pollution of underground water |
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| Publication Number | Publication Date |
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| CN203568898U true CN203568898U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320560424.4U Expired - Fee Related CN203568898U (en) | 2013-09-09 | 2013-09-09 | Device for remedying nitrate pollution of underground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355407A (en) * | 2014-10-22 | 2015-02-18 | 南京中电环保股份有限公司 | Processing method and device for slaughter wastewater |
| CN109160690A (en) * | 2018-09-30 | 2019-01-08 | 南京信息工程大学 | A kind of nitrate nitrogen in ground water and fluorine ion processing system and processing method |
-
2013
- 2013-09-09 CN CN201320560424.4U patent/CN203568898U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355407A (en) * | 2014-10-22 | 2015-02-18 | 南京中电环保股份有限公司 | Processing method and device for slaughter wastewater |
| CN104355407B (en) * | 2014-10-22 | 2017-04-05 | 南京中电环保股份有限公司 | A kind of processing method and processing device of slaughtering wastewater |
| CN109160690A (en) * | 2018-09-30 | 2019-01-08 | 南京信息工程大学 | A kind of nitrate nitrogen in ground water and fluorine ion processing system and processing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 |