CN110156107A - The processing method of low concentration nitrate nitrogen waste water - Google Patents
The processing method of low concentration nitrate nitrogen waste water Download PDFInfo
- Publication number
- CN110156107A CN110156107A CN201910499534.6A CN201910499534A CN110156107A CN 110156107 A CN110156107 A CN 110156107A CN 201910499534 A CN201910499534 A CN 201910499534A CN 110156107 A CN110156107 A CN 110156107A
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- resin
- waste water
- denitrogenation
- reaction device
- denitrification
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention relates to sewage advanced treatment fields, provide a kind of method of low concentration nitrate nitrogen waste water, the processing method including the following steps: (1) carry out denitrogenation adsorption reaction to waste water by resin reaction device;(2) processing of denitrification denitrogenation desorption is carried out to the resin after suction nitrogen;(3) denitrogenation resin is activated;(4) it repeats to carry out denitrification reaction processing to waste water;This method carries out selective absorption to the nitrate nitrogen in waste water using denitrogenation resin, in the case where supplementary carbon source, carries out denitrification denitrogenation to the nitrate nitrogen being adsorbed on resin using inoculation denitrifying bacterium, completes resin regeneration and utilize, to the repetition denitrogenation processing of waste water.
Description
Technical field
The present invention relates to a kind of methods of low concentration nitrate nitrogen waste water, belong to sewage advanced treatment field.
Technical background
With urban development, water eutrophication problem is got worse, and total nitrogen causes water quality to deteriorate in water body
One of the main reasons.End-of-pipe control part of the urban wastewater treatment firm as urban drainage system, water outlet total nitrogen situation are direct
Whether influencing the quality of the main water ecological setting in the city.In addition country is increasingly tight to urban wastewater treatment firm drainage requirement
An important factor for lattice, the limitation of total nitrogen index becomes sewage treatment plant's operational management and upgrading.
Processing technique for waste water advanced denitrogenation is broadly divided into physical-chemical process and biological treatment, wherein physical chemistry
Method mainly has break point chlorination method and resin adsorption method；Bioanalysis mainly has denitrification filter pool and artificial swamp.Resin adsorption due to
The features such as its selectivity is by force, adsorption capacity is big, easy to operate, good application is shown in low concentration total nitrogen wastewater treatment
Prospect.Chinese Patent Application No. 200810180280.3 and 201010289340.3 discloses a kind of using ion exchange resin pair
The method that secondary effluent of municipal sewage plant carries out advanced nitrogen dephosphorization processing, but the method ignores resin desorption afterchlorinate
The processing of sodium solution；Chinese Patent Application No. 201710296761.X discloses a kind of industrial wastewater, biochemical tailrace advanced denitrogenation
The method of dephosphorization, the method carry out Adsorption to Determination of Total Nitrogen in Waste Water using selective resin, and resin desorption liquid is delivered at sewage
The front end Li Chang biochemical treatment system, but the method desorption liquid sodium chloride concentration is high, and greater impact, shadow can be caused to system activity sludge
Acoustic system operates normally；Chinese Patent Application No. 201611046421.3 discloses a kind of based on nitrate nitrogen Chemical Decomposition-physics turn
The sewage deep denitrification process of shifting after the method is adsorbed Determination of Total Nitrogen in Waste Water using selective absorption medicament, then medicament is set
It is removed in anerobic sowage processing unit using the total nitrogen that denitrifying bacterium in system adsorbs medicament, which preferably avoids
The generation of desorption liquid, but complicated for operation, and sludge in anerobic sowage processing unit may occluding device, influence medicament
Adsorption effect next time.In addition Chinese Patent Application No. 201310420746.3 discloses a kind of anti-nitre of ion exchange-Zero-valent Iron-
Change bacterium and couples denitrogenation method, which couples Zero-valent Iron and resin, and it is added after waste water and is inoculated with denitrifying bacterium, confined reaction 7 days
Determination of Total Nitrogen in Waste Water removes substantially afterwards, but the method is unable to continuous operation, and single treatment waste water is less, and the reaction time is long, it is difficult to engineering
Change, and do not consider the problems of carbon source in waste water in reaction, denitrifying bacteria is in the case where lacking carbon source, it is difficult to rise to total nitrogen
To preferable removal effect.Therefore, the processing of resin desorption liquid and resin regeneration problem are solved the problems, such as, is resin adsorption engineer application
Key.
Invention class is held
In order to solve the problems, such as that urban wastewater treatment firm water outlet total nitrogen content is exceeded, the present invention provides a kind of low concentration nitrate nitrogen waste water
Processing method.This method solve the intractable situation of desorption liquid, denitrifying bacteria inhales resin to after resin denitrogenation again
Small, the simple process of attached influence, can be engineered operation.
To solve the above-mentioned problems, The technical solution adopted by the invention is as follows: the method for low concentration nitrate nitrogen waste water, the processing
Method including the following steps:
(1) denitrogenation adsorption reaction is carried out to waste water by resin reaction device:
Low concentration total nitrogen waste water is squeezed into resin reaction device from the water inlet of resin reaction device, nitrate nitrogen is through resin reaction in waste water
After denitrogenation resins selective absorption in device, it is discharged into from the water outlet of resin reaction deviceIn denitrification nutrient solution reservoir;
(2) to the resin after suction nitrogenCarry out denitrification denitrogenationDesorption processing:
In denitrification nutrient solution reservoirIt addsDenitrification additive, start blender and be allowed to be uniformly mixed with denitrogenation waste water
It arrivesDenitrificationNutrient solution, it is configured anti-with circulating pumpNitreChange nutrient solution to be pumped into the resin reaction device equipped with denitrogenation resin, lead to
It crossesInoculation denitrifying bacterium carries out denitrification denitrogenation processing to the nitrate nitrogen being adsorbed on resin, the denitrification nutrient solution after denitrogenation processing It is returned to denitrification nutrient solution reservoir again, will after 3 ~ 5 days circular response timeDenitrification nutrient solutionIt is emitted intoDenitrification In nutrient solution reservoir；
(3) denitrogenation resin is activated:
(1) waste water up to standard will be handled to be pumped into activating solution reservoir, and is added in activating solution reservoir and can activates denitrogenation tree
Resin activated dose of rouge, starting blender is allowed to be uniformly mixed to obtain activating solution with waste water, by configured activating solution by activating
The outlet of liquid reservoir enters in resin reaction device through the water inlet of resin reaction device, and activating solution floods the de- of resin reaction device
Activating solution in resin reaction device after impregnating 2~4h, is drained into activating solution reservoir and gives over to next use, resin is living by nitrogen resin
Resin is cleaned again with the waste water after up to standard again after change, the waste water after cleaning is discharged into the conditioning tank of sewage treatment plant, and clear
Washed denitrogenation resin repeats stand-by;
(4) it repeats to carry out denitrification reaction processing to waste water:
By the resin after denitrifying bacterium regeneration and sodium chloride solution cleaning in step (3), be used to adsorb in waste water again
Total nitrogen repeats the recycling that (1), (2), (3) and (4) completes denitrogenation resin in resin reaction device.
Further improved to be: denitrogenation resin adds 30% ~ 60% that volume is reactor volume in resin reaction device.
Further improved to be: the denitrification additive is carbon source and denitrifying bacterium, the initial dosage dimension of denitrifying bacterium
It holds 1.5 × 105 CFU/mL~×105CFU/mL；Configure CODCODDimension is in 500 ~ 1000mg/L；
Further improved to be: the carbon source is carbonaceous organic material, and denitrifying bacterium is denitrifying bacteria dry powder or contains anti-nitre
Change the solution of bacterium；
Further improved to be: described resin activated dose is sodium chloride, and the mass concentration in activating solution is 2% ~ 3%.
Further improved to be: resin reaction device is more than one,
Further improved to be: resin reaction device bottom is equipped with water distributor, the water inlet phase of the water distributor and resin reaction device
Connection.
Further improved to be: denitrification nutrient solution reservoir is open type design, and volume is single resin reaction device appearance
Long-pending 2 ~ 5 times.
Further improved to be: the shell of resin reaction device is opaque material.
Further improved to be: the low concentration total nitrogen waste water enters to resin reaction with the flow velocity of 5BV/h~10BV/h
It is described anti-in deviceNitreChange nutrient solution to be pumped into the resin reaction device equipped with denitrogenation resin with the flow velocity of 2BV/h.
The utility model has the advantages that
Compared to the prior art compared with, the beneficial effects of the present invention are as follows:
(1) this method carries out selective absorption to the nitrate nitrogen in waste water using denitrogenation resin, in the case where supplementary carbon source, uses
Inoculation denitrifying bacterium carries out denitrification denitrogenation to the nitrate nitrogen being adsorbed on resin, completes resin regeneration and utilizes, the repetition to waste water
Denitrogenation processing.
(2)By low concentration total nitrogen waste water by being equipped with the resin reaction device of denitrogenation resin, nitrate nitrogen is by Choice of Resin in waste water
Property absorption after, discharged wastewater met the national standard.Resin after adsorption saturation, it is anti-under conditions of adding carbon source and inoculation denitrifying bacterium
Nitrifier regards carrier, and the resin reaction device equipped with resin can regard that a denitrification device, saturated resin are mentioning as at this time
While for nitrogen source, returns denitrifying bacterium and provide good growth and breeding environment.This method avoid the productions of resin desorption liquid
Raw, denitrogenation is thorough, and adsorption effect is good again after resin denitrogenation；
(3) by after denitrifying bacterium denitrogenation, the sodium chloride elution resin surface denitrifying bacterium of low concentration generates the total nitrogen of resin adsorption
Eluent can be recycled, be recycled repeatedly after, since salinity is low, sewage treatment plant's conditioning tank can be emitted into
It is handled, on subsequent biochemical without influence.
Detailed description of the invention
Fig. 1 is resin fortune in the processing unit and method of a kind of urban wastewater treatment firm low concentration nitrate nitrogen waste water of the invention
Capable, regenerated top view.
Fig. 2 is resin fortune in the processing unit and method of a kind of urban wastewater treatment firm low concentration nitrate nitrogen waste water of the invention
Capable, regenerated front view.
Fig. 3 is resin fortune in the processing unit and method of a kind of urban wastewater treatment firm low concentration nitrate nitrogen waste water of the invention
Capable, regenerated side view.
Fig. 4 is resin fortune in the processing unit and method of a kind of urban wastewater treatment firm low concentration nitrate nitrogen waste water of the invention
Capable, regenerated bottom sectional view.
Specific embodiment
Embodiment:
As shown in Figs 1-4, the processing unit that the present invention discloses a kind of low concentration nitrate nitrogen waste water includes activating solution reservoir 2, is set to
One group of resin reaction device 1 of 2 two sides of activating solution reservoir and set on two resin reaction device sides denitrification nutrient solution store
Device 3；Each 1 bottom of resin reaction device is equipped with water inlet 4, discharge outlet 6, is equipped with water outlet 5 at the top of each resin reaction device 1, respectively
Import and export is all made of meshy steel wire, the netted resin that shuts off.Water can by the case where, resin can be retained, each resin is anti-
Device bottom is answered to be equipped with water distributor 10, the water distributor 10 is connected with the water inlet 4 of resin reaction device.Activating solution reservoir 2 is
Opening can intake for top, and bottom is equipped with outlet 7, be equipped with blender 9 in activating solution reservoir；The water outlet of activating solution reservoir 2
Mouth is connected with the water inlet 4 of each resin reaction device respectively, and the 3 both ends bottom of denitrification nutrient solution reservoir is equipped with water outlet
8, denitrification nutrient solution reservoir is interior to be equipped with blender 9, and denitrification nutrient solution reservoir is open type design, and volume is single sets
2 ~ 5 times of rouge reactor volume.From the water outlet 5 of resin reaction device, discharge outlet 6 respectively with denitrification nutrient solution reservoir 3 Opened upper end mouth is connected.The water outlet 8 of the denitrification nutrient solution reservoir 3 water inlet 4 with each resin reaction device respectively
It is connected.
Resin reaction device is two, a Qu Zaisheng, and the absorption of 2nd area, one group spare, resin adsorption reactor two reaction zones
Alternate run, resin reaction device shell are opaque material.Opaque material makes denitrifying bacterium live in dark condition, growth
Faster, shading is conducive to grow speed.
It is with the method for the processing unit of above-mentioned Fig. 1 to Fig. 4 processing low concentration nitrate nitrogen waste water, in the present embodiment, certain cities and towns
Secondary sedimentation tank of sewage treatment work water outlet in total nitrogen concentration be 20~25mg/L, sewage mentions be marked with after require total nitrogen in 15mg/L hereinafter,
Denitrogenation resin in the present embodiment resin adsorption reactor uses the resin of model D205, and processing step includes the following:
(1) denitrogenation adsorption reaction is carried out to waste water by resin reaction device:
Secondary clarifier effluent is squeezed into resin reaction device with the flow velocity of 5BV/h~10BV/h from the water inlet of resin reaction device, is given up
Nitrate nitrogen is discharged into after the denitrogenation resins selective absorption in resin reaction device from the water outlet of resin reaction device in waterDenitrification In nutrient solution reservoir;Denitrogenation resin adds 30% ~ 60% that volume is reactor volume in resin reaction device;When treated
When Determination of Total Nitrogen in Waste Water is close to 10mg/L, by the resin regeneration in a resin reaction device, while spare resin reactor start-up
Operation；
(2) to the resin after suction nitrogenCarry out denitrification denitrogenationDesorption processing:
By handle it is up to standard after waste water fill denitrification nutrient solution reservoir,In denitrification nutrient solution reservoirIt addsDenitrification Additive, the denitrification additive is carbon source and denitrifying bacterium, and the initial dosage of denitrifying bacterium maintains 1.5 × 105 CFU/
mL~×105CFU/mL；Configure CODCODDimension is in 500 ~ 1000mg/L；The carbon source is carbonaceous organic material, instead
Nitrifier is denitrifying bacteria dry powder or the solution containing denitrifying bacteria；Starting blender be allowed to will handle it is up to standard after it is useless
Water is uniformly mixed and obtainsDenitrificationNutrient solution, it is configured anti-with circulating pumpNitreChange nutrient solution is pumped into the flow velocity of 2BV/h to be equipped with
In the resin reaction device of denitrogenation resin, pass throughInoculation denitrifying bacterium carries out at denitrification denitrogenation the nitrate nitrogen being adsorbed on resin It manages, the denitrification nutrient solution after denitrogenation processing is returned again to denitrification nutrient solution reservoir, after 3 ~ 5 days circular response time,
It willDenitrification nutrient solution passes through discharge outlet 6It is emitted intoIn denitrification nutrient solution reservoir；
(2) denitrogenation resin is activated:
Waste water up to standard will be handled to be pumped into activating solution reservoir, and added in activating solution reservoir and can activate denitrogenation resin
Resin activated dose, described resin activated dose is sodium chloride, and the mass concentration in activating solution is 2% ~ 3%, starting stirring
Machine is allowed to be uniformly mixed to obtain activating solution with waste water, and configured activating solution is anti-through resin by the outlet 7 of activating solution reservoir
The water inlet 4 of device is answered to enter in resin reaction device, activating solution floods the denitrogenation resin of resin reaction device, will after impregnating 2~4h
Activating solution in resin reaction device drains into activating solution reservoir and gives over to next use, it is resin activated after again with the waste water after up to standard again
Resin is cleaned, the waste water after cleaning is discharged into the conditioning tank of sewage treatment plant, and cleaned denitrogenation resin repetition is stand-by;
(4) it repeats to carry out denitrification reaction processing to waste water:
By the resin after denitrifying bacterium regeneration and sodium chloride solution cleaning in step (3), be used to adsorb in waste water again
Total nitrogen repeats the recycling that (1), (2), (3) and (4) completes denitrogenation resin in resin reaction device.
Claims (10)
1. the method for low concentration nitrate nitrogen waste water, it is characterised in that: the processing method including the following steps:
(1) denitrogenation adsorption reaction is carried out to waste water by resin reaction device:
Low concentration total nitrogen waste water is squeezed into resin reaction device from the water inlet of resin reaction device, nitrate nitrogen is through resin reaction in waste water
After denitrogenation resins selective absorption in device, it is discharged into from the water outlet of resin reaction deviceIn denitrification nutrient solution reservoir;
(2) to the resin after suction nitrogenCarry out denitrification denitrogenationDesorption processing:
In denitrification nutrient solution reservoirIt addsDenitrification additive, start blender and be allowed to be uniformly mixed with denitrogenation waste water
It arrivesDenitrificationNutrient solution, it is configured anti-with circulating pumpNitreChange nutrient solution to be pumped into the resin reaction device equipped with denitrogenation resin, lead to
It crossesInoculation denitrifying bacterium carries out denitrification denitrogenation processing to the nitrate nitrogen being adsorbed on resin, the denitrification nutrient solution after denitrogenation processing It is returned to denitrification nutrient solution reservoir again, will after 3 ~ 5 days circular response timeDenitrification nutrient solutionIt is emitted intoDenitrification In nutrient solution reservoir；
(3) denitrogenation resin is activated:
Waste water up to standard will be handled to be pumped into activating solution reservoir, and added in activating solution reservoir and can activate denitrogenation resin
Resin activated dose, starting blender is allowed to be uniformly mixed to obtain activating solution with waste water, and configured activating solution is store by activating solution
The outlet of storage enters in resin reaction device through the water inlet of resin reaction device, and activating solution floods the denitrogenation tree of resin reaction device
Activating solution in resin reaction device is drained into activating solution reservoir and gives over to next use, after resin activated by rouge after impregnating 2~4h
Resin is cleaned again with the waste water after up to standard again, the waste water after cleaning is discharged into the conditioning tank of sewage treatment plant, and cleaned
Denitrogenation resin repeat it is stand-by;
(4) it repeats to carry out denitrification reaction processing to waste water:
By the resin after denitrifying bacterium regeneration and sodium chloride solution cleaning in step (3), be used to adsorb in waste water again
Total nitrogen repeats the recycling that (1), (2), (3) and (4) completes denitrogenation resin in resin reaction device.
2. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: denitrogenation resin in resin reaction device
Add 30% ~ 60% that volume is reactor volume.
3. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: the denitrification additive is carbon
Source and denitrifying bacterium, the initial dosage of denitrifying bacterium maintain 1.5 × 105 CFU/mL~×105CFU/mL；Configure CODChemistry Oxygen demandDimension is in 500 ~ 1000mg/L.
4. the method for low concentration nitrate nitrogen waste water according to claim 3, it is characterised in that: the carbon source is carbon containing organic
Object, denitrifying bacterium are denitrifying bacteria dry powder or the solution containing denitrifying bacteria.
5. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: described resin activated dose is chlorine
Change sodium, the mass concentration in activating solution is 2% ~ 3%.
6. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: resin reaction device be one with
On.
7. the method for low concentration nitrate nitrogen waste water according to claim 6, it is characterised in that: resin reaction device bottom is equipped with cloth
Water pipe, the water distributor are connected with the water inlet of resin reaction device.
8. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: denitrification nutrient solution reservoir is
Open type design, volume are 2 ~ 5 times of single resin reaction device volume.
9. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: the shell of resin reaction device is not
Light-transmitting materials.
10. the method for low concentration nitrate nitrogen waste water according to claim 1, it is characterised in that: the low concentration total nitrogen waste water
It is entered in resin reaction device with the flow velocity of 5BV/h~10BV/h, it is described anti-NitreChange nutrient solution is pumped into the flow velocity of 2BV/h to be equipped with
In the resin reaction device of denitrogenation resin.
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