CN106746178A - A kind of sewage deep denitrification process based on the transfer of nitrate nitrogen Chemical Decomposition physics - Google Patents
A kind of sewage deep denitrification process based on the transfer of nitrate nitrogen Chemical Decomposition physics Download PDFInfo
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
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- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
- C02F2001/007—Processes including a sedimentation step
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- 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
- C02F2101/163—Nitrates
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- C02F2301/04—Flow arrangements
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- C02F2301/00—General aspects of water treatment
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F3/28—Anaerobic digestion processes
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- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention discloses a kind of sewage deep denitrification process based on the transfer of nitrate nitrogen Chemical Decomposition physics, the sewage water denitrification technique is comprised the following steps：(1) medicament that nitrate nitrogen can be removed from water is loaded into and medicine unit is formed in load units, and medicine unit is added to need reduce nitrate nitrogen content sewage treatment unit sewage in carry out chemicals treatment；(2) treatment to sewage is completed after the 5h of chemicals treatment 1, the nitrate nitrogen in sewage is transferred on medicament, and the total nitrogen content of sewage declines and reaches Effluent criteria；(3) medicine unit is separated from sewage, and by its physical transfer and be immersed in anaerobic organism reaction member, in course of reaction, the nitrate nitrogen on medicament is resolved in anaerobic organism reaction member, gaseous nitrogen is converted into by microorganism denitrification, the removing of nitrogen is realized.It can not increase or as far as possible reduce plus sewage treatment facility floor space on the premise of, improve denitrification efficiency, strengthened denitrification effect.
Description
Technical field
The present invention relates to water treatment field, more particularly to a kind of sewage deep denitrification process based on nitrate nitrogen physical transfer and
Its equipment.
Background technology
Nitrate is widely present in surface water and groundwater, and China's azotate pollution has the trend for increasing year by year.It is excessive
Nitrate can cause body eutrophication, the drinking water containing excess nitrate is drunk for a long time can also endanger human health.Nitre
The removal of hydrochlorate receives much concern in water treatment field always.
The water outlet of current sewage treatment plants is most of can be directly or after further regeneration treatment as ecological water supplement
It is directly discharged into natural water body.Especially in north water deficit area, by taking Beijing as an example, about 1/ in sewage treatment plants recycled water
3 are used for ecological environment moisturizing, year 1 billion cubic meter of rate of water make-up.Therefore sewage treatment plants water outlet is nitrate nitrogen in natural water body
One big important sources.To increase water prevention and cure of pollution dynamics conscientiously, State Council formulates《Water prevention and cure of pollution action plan》(" water ten
Bar ").Wherein " town domestic sewage treatment plant effluent enters country and saves the major river valley and lake, reservoir for determining clear stipulaties
During etc. closed, semiclosed waters, should perform《Urban wastewater treatment firm pollutant emission standard》(GB1891-2002) one-level in
The A standards of standard ".And in the Effluent criteria, it is more difficult to the mainly total nitrogen for reaching, its limit value is 15mg/L.In addition, partly
Tightened up sewage drainage standard, such as Beijing's provincial standard are also formulated in area《Urban wastewater treatment firm Sewage Water Emissions mark
It is accurate》(DB11890-2012) define and enter Beijing II, new (change, expand) of Group III water body builds urban wastewater treatment firm water outlet
Total nitrogen limit value is promoted to 10mg/L.And China's urban wastewater treatment firm secondary effluent total nitrogen is general in 15-40mg/L, wherein nitrate nitrogen
Account for total nitrogen content 50-75%.Therefore, advanced nitrogen, further reduces water outlet nitrate nitrogen concentration, has become sewage treatment plant and carries
Mark transformation needs key problems-solving.
The nitrate nitrogen removal technology for using at present mainly includes biological denitrificaion method, chemical reduction method, ion-exchange, anti-
Osmosis and absorption method.Wherein biological denitrificaion method be the most tradition and the most commonly used bio-denitrifying sewage technique of engineer applied.
Denitrification, i.e. denitrifying bacterium are relied primarily on using the nitrate in biological removal sewage under anoxic conditions, using organic
Nitrate reduction, as electron donor, is the process of gaseous nitrogen by the carbon sources such as thing.Denitrification process can be divided mainly into rearmounted anti-nitre
Chemical industry skill and front establishment method.Rear-mounted denitrification technique follows nitrification, denitrifying sequencing, and denitrification pond is placed in
The rear end of aerobe technique.To a certain extent can easy operational administrative because not needing nitrification liquid to flow back in the system.But because
Front end aerobe technique has consumed the organic carbon source in most of sewage, causes denitrification process carbon source not enough, serious shadow
Its denitrification effect is rung, therefore also needs to additional organic carbon source.Carbon source dosage deficiency can cause nitrite nitrogen to accumulate, and add
Amount can cause secondary pollution again.While operation difficulty rises, operating cost also accordingly increases.Prepositive denitrification is then by anaerobism
Bioprocess technology is placed in aerobe technique front end, will be mixed with raw water in the effluent recycling of Aerobic Pond to anaerobic pond, utilizes
Organic matter in sewage raw water carries out denitrification denitrogenation as carbon source.Relative to rear-mounted denitrification, front establishment method application
Relatively wide, such as more ripe A/O, A2/O technique.
In face of increasingly strict town domestic sewage treatment plant discharge standard, if carried out using traditional biological denitrificaion method
Upgrading, in order to improve denitrification efficiency, then needs to extend original purification structure or newly-increased nitrification and denitrification pond
To improve residence time and sludge age.This will be further increased technological process and floor space, and capital cost is high, running
Energy consumption and maintenance expense it is also very high.Particularly current many town domestic sewage factories surrounding cities quickly grow, and do not possess
Condition provides enough locus for Sewage Plant upgrading.Therefore do not increasing in the urgent need to finding a kind of new process program
Plus or as far as possible reduce plus structures on the premise of, improve nitrate removal efficiency, with ensure process water outlet total nitrogen it is up to standard,
Realize the upgrading of sewage treatment plant.
The information for being disclosed in the background section is merely intended to increase the understanding to general background of the invention, without answering
In being considered as recognizing or imply in any form that the information structure has been the prior art well known to persons skilled in the art.
The content of the invention
The present invention in order in solving sewage disposal water outlet nitrate nitrogen content it is high, total nitrogen is difficult to stably reach standard, but profit
With traditional upgrading scheme floor space greatly, the problems such as capital construction high cost, there is provided a kind of new sewage deep denitrogenation
Method and its equipment, the method and equipment can not increase or as far as possible reduce plus sewage treatment facility floor space on the premise of,
Improve denitrification efficiency, strengthened denitrification effect.
The present invention is achieved by the following technical solutions：
A kind of sewage denitrification system, including need to reduce the sewage treatment unit and biological denitrification system of nitrate nitrogen content
In anaerobic bio-treated unit, also including medicine unit and the medicine unit can needed to reduce nitrate nitrogen content
The Transmission system for separating back and forth and transporting between the sewage of sewage treatment unit and the sewage of anaerobic bio-treated unit, the medicine
Agent unit includes load units and the medicament that nitrate nitrogen can be removed from water being loaded in inside load units.
Above-mentioned sewage denitrification system in another embodiment, it is described need reduce nitrate nitrogen content sewage disposal
Unit is the Aerobic biological process unit in sedimentation basin or biological denitrification system.
In another embodiment, the medicament that nitrate nitrogen can be removed from water includes above-mentioned sewage denitrification system
Denitrogenation flocculant, strong-base anion-exchange resin, modified activated carbon, modified zeolite, houghite and cross-linked chitosan etc.
In at least one and described medicament that nitrate nitrogen can be removed from water to the adsorption capacity scope 30-300mg/ of nitrate nitrogen
g。
Above-mentioned sewage denitrification system in another embodiment, the Transmission system include from need reduce nitrate nitrogen
Separation equipment, the Yi Ji of medicine unit are separated in the sewage treatment unit of content and/or the sewage of anaerobic bio-treated unit
The fortune of medicine unit is transported between the sewage treatment unit and anaerobic bio-treated unit that need reduction nitrate nitrogen content back and forth
Transfer device.
In another embodiment, the Transmission system also includes the control separation equipment to above-mentioned sewage denitrification system
With the automation control appliance of transporting equipment.
In another embodiment, the load units include engineering plastics framework and installation to above-mentioned sewage denitrification system
Screen cloth in engineering plastics framework.
In another embodiment, the material of the screen cloth is polyethylene to above-mentioned sewage denitrification system.Polyethylene material
Screen cloth both can guarantee that being fully contacted for medicament and sewage, the medicament for being combined with nitrate nitrogen can again quickly solved in water
With reference to.
In another embodiment, the anaerobic bio-treated unit is pond body to above-mentioned sewage denitrification system, is set in pond
There is plug-flow to stir facility.Such as anaerobic bio-treated unit can be used directly the original anaerobic organism reaction tank of Sewage Plant.
In another embodiment, the Aerobic biological process unit is pond body to above-mentioned sewage denitrification system, is set in pond
There is plug-flow to stir facility and aerator.It is anti-that such as Aerobic biological process unit can be used directly the original aerobe of Sewage Plant
Ying Chi.
A kind of sewage denitrification method, comprises the following steps：
(1) medicament that nitrate nitrogen can be removed from water is loaded into and medicine unit is formed in load units, and be added to
Chemicals treatment is carried out in the sewage for needing the sewage treatment unit for reducing nitrate nitrogen content；
(2) treatment to sewage is completed after chemicals treatment 1-5h, the nitrate nitrogen in sewage is transferred on medicament, sewage
Total nitrogen content declines and reaches Effluent criteria；
(3) medicine unit in step 2 is separated from sewage, and by its physical transfer and is immersed in anaerobic organism
The reaction time is about 3-10h in reaction member.In course of reaction, the nitrate nitrogen on medicament is resolved to anaerobic organism reaction member
In, gaseous nitrogen is converted into by microorganism denitrification, realize the removing of nitrogen.
Above-mentioned sewage denitrification method in another embodiment, it is described need reduce nitrate nitrogen content sewage disposal
Unit is the Aerobic biological process unit in sedimentation basin or biological denitrification system.With the aerobe reaction list in biological denitrificaion method
Unit is processed sewage；Nitrogen in sewage can be converted mainly into nitrate nitrogen by the step.
In another embodiment, the medicament that nitrate nitrogen can be removed from water includes above-mentioned sewage denitrification method
Denitrogenation flocculant, strong-base anion-exchange resin, modified activated carbon, modified zeolite, houghite and cross-linked chitosan etc.
In at least one and described medicament that nitrate nitrogen can be removed from water to the adsorption capacity scope 30-300mg/ of nitrate nitrogen
g.The effect of Chinese medicine of the present invention be nitrate nitrogen concentration it is high using flocculation, absorption and the method such as ion exchange by sewage
The nitrate nitrogen of middle solubilised state is transferred on medicament, then in the low anaerobic bio-treated unit of nitrate nitrogen concentration by nitrate nitrogen
Discharge, carry out denitrification.
In another embodiment, in step 1 be added to for medicine unit by above-mentioned sewage denitrification method needs to reduce nitre
When in the sewage of the sewage treatment unit of hydrochlorate nitrogen content, the initial dosage of medicament is to process water per hour per hour
0.05-1% (mass percent).Nitrate nitrogen adsorption capacity, water inlet total nitrogen content and Effluent criteria are determined according to medicament.
Such as：Design discharge is 1000m per hour3/h.In the middle of processing procedure, the initial dosage of flocculant is to process water per hour per hour
0.1% (mass percent) of amount, i.e., the flocculation dosage needed per hour when initial is 1000kg, if necessary to disposable treatment
3 hours, then the dosage for needing disposably to put into flocculant is 3000kg.
Above-mentioned sewage denitrification method in another embodiment, also includes：To react single by anaerobic organism in step 3
Medicament after elementary reaction is separated and is transported to the original of the sewage treatment unit for needing reduction nitrate nitrogen content again and adds position
Place is put to recycle.Nitrate nitrogen after being reacted in anaerobic organism reaction member in step 3 on medicament has been resolved to anaerobism life
Thing reaction member, so that medicament realizes functional rehabilitation.
Above-mentioned sewage denitrification method in another embodiment, will react in step 3 by anaerobic organism reaction member
Later medicament is separated and is transported to the original of aerobe reaction unit again and adds when being recycled at position, treatment unit bodies
The medicament of the 1-10% (mass percent) of initial dosage in step 1 is required supplementation with during contamination water, to ensure continuing for system
Operational effect.
In another embodiment, in step 1 be added to for medicine unit by above-mentioned sewage denitrification system needs to reduce nitre
In the sewage of the sewage treatment unit of hydrochlorate nitrogen content, position is added for nitrate from waste water nitrogen content highest point, specifically preferably
Oxygen biological processing unit end, submergence of the medicine unit in sewage is 2-5m under water.
In another embodiment, the anaerobic bio-treated unit is anaerobism pond body, pond to above-mentioned sewage denitrification system
Plug-flow stirring facility is inside provided with, in 0-0.5mg/L, anaerobic sludge concentration is 4000- to Dissolved Oxygen concentration Control in anaerobic pond
6000mg/L.Anaerobic Treatment unit can be used directly the original anaerobic organism reaction tank of Sewage Plant.
In another embodiment, the Aerobic biological process unit is aerobic pond body, pond to above-mentioned sewage denitrification system
Plug-flow stirring facility and aerator are inside provided with, in 0.5-2mg/L, aerobic sludge concentration is Dissolved Oxygen concentration Control in Aerobic Pond
2500-4000mg/L.Aerobic treatment unit can be used directly the original aerobe reaction pond of Sewage Plant.
The nitrate nitrogen of solubilised state in sewage is transferred to medicine by the present invention using methods such as flocculation, absorption and ion exchanges
In agent.After the nitrate nitrogen of solubilised state in sewage is transferred to medicament this process reaches certain balance, these are contained into nitric acid
The enhancing transport of salt nitrogen is in anaerobic bio-treated unit.Nitrate nitrogen on medicament is re-released into water by the effect such as parsing
In, and gaseous nitrogen is reduced to by the denitrifying bacterium in anaerobic pond, realize denitrification denitrogenation.
Compared with prior art, the invention has the advantages that：
1st, sewage of the present invention is not limited to outputted aerobic water, as long as the standard that nitrate from waste water nitrogen content reaches needed for exceeding
When, nitrate nitrogen is transferred to anaerobic bio-treated unit as medium using the medicament with nitrate nitrogen remove function
It is removed.Optionally, the present invention is set based on the sewage disposal with anaerobic bio-treated unit and aerobic biological processing unit
Apply and transformed, that is, the technique including but not limited to rear-mounted denitrification technique or preposition that the sewage treatment facility being modified is used
Denitrification process, such as：The sewage treatment process system such as A/O, A2/O, oxidation ditch.After rear-mounted denitrification technique is transformed through the application,
Nitrate nitrogen can be removed in Aerobic Pond water outlet, and Aerobic Pond water outlet need not again flow into anaerobic pond and carry out denitrification, anaerobic pond
Then major alterations as medicament regeneration place.After front establishment method is transformed through the application, Aerobic Pond water outlet need not be returned
In flowing to anaerobic pond, it is only necessary to which the medicament that will be loaded with nitrate nitrogen returns to anaerobic pond.
2nd, nitrification liquid flows directly into the mode of anaerobic bio-treated unit in present invention substitution existing process, eliminates nitrification liquid
In negative effect of the dissolved oxygen to anaerobic bio-treated unit anaerobic environment, it is ensured that denitrifying bacterium activity in anaerobic pond；Again
Because nitrate nitrogen is needed when passing back into anaerobic pond while a large amount of water that flow back in routine techniques, and this technology is not required to recirculation water and only turns
Nitrate nitrogen is moved, therefore increased the concentration of nitrate nitrogen in Anaerobic treatment technique, so as to improve denitrification efficiency, strengthened
Denitrification effect, realizes the advanced nitrogen of sewage, and treatment water outlet can be stably reached《Urban wastewater treatment firm pollutant emission standard》
(GB1891-2002) requirement of the A standards of primary standard to total nitrogen in, can also according to demand adjust adsorbent or medicament
Usage amount and then reach tightened up discharge standard.
3rd, the concentration of nitrate nitrogen in aerobic treatment unit water outlet is effectively reduced, suppresses denitrification in post precipitation pond
Generation, improve mud-water separation efficiency.
4th, to bio-denitrifying sewage handling process propose mark transformation using the technology in the present invention, without newly-increased or
Person extends purification structure, greatly reduces the floor space of capital cost and purification structure.
Brief description of the drawings
Fig. 1 is the structural representation of sewage denitrification system of the present invention, wherein 1 is anaerobic bio-treated unit, 2 is to need drop
The sewage treatment unit of protonitrate nitrogen content, 3 is Transmission system, and 4 is medicine unit.
Specific embodiment
Specific embodiment of the invention is described in detail below, it is to be understood that protection scope of the present invention is not
Limited by specific embodiment.
Embodiment 1
Certain town domestic sewage treatment plant performs GB18918-2002 using the double channel type oxidation channel handling process of DE types, water outlet
《Urban wastewater treatment firm pollutant emission standard》In one-level (B) standard.With the development of economic society, environmental administration is to dirt
The requirement of water treatment plant's treatment water outlet is increasingly strict.The sewage treatment plant is also faced with the task of upgrading, and water outlet must reach
Arrive《Urban wastewater treatment firm pollutant emission standard》The requirement of GB18918-2002 one-level A standards.Its Major Difficulties is total
The further removal of nitrogen.But exploitation is finished substantially in the sewage treatment plant periphery plot, is not satisfied the requirements as Sewage Plant is upgraded
Transformation provides enough locus.Therefore Sewage Plant is transformed using process program of the present invention.
Concrete technology protocol step is as follows：
(1) patent of invention " a kind of denitrogenation flocculant and its preparation method and application " (patent No. is selected：ZL
201410350490.8) the denitrogenation flocculant described in, the solid produced after denitrogenation flocculant effect is transferred to nitrate
When in the relatively low water of nitrogen content, nitrate nitrogen can be re-released into water, and the nitrate nitrogen adsorption capacity of the denitrogenation flocculant is
186mg/g.The design scale of the Sewage Plant is 20,000 m3/ d, it is considered to the change of instantaneous delivery, design discharge is 1000m per hour3/
h.In the middle of processing procedure, initial flocculation agent dosage is 0.1% (mass percent) for processing water, i.e., needed per hour when initial
The flocculation dosage wanted is 1000kg.The solid denitrogenation flocculant of 1000kg is added to engineering plastics framework and polyethylene material
Screen cloth composition load units in formed a medicine unit.
(2) sewage flows through anaerobic pond and double channel type oxidation channels in double channel type oxidation channel front ends successively.In anaerobic pond
Dissolved oxygen concentration is 0.2-0.3mg/L, and sludge concentration is 5000-6000mg/L.Dissolved oxygen concentration in oxidation ditch is according to difference
Position changes in the range of 0.5-1.5mg/L, and wherein sludge concentration is 3000-4000mg/L.Sewage is in anaerobic pond and double ditch formulas
Residence time in oxidation ditch is respectively 2.5h and 15.5h.Ammonia nitrogen in sewage is in double channel type oxidation channels by microorganism
Nitrification is changed into nitrate nitrogen.
(3) Transmission system of medicine unit includes crane, track, automation control appliance and power facility.By medicament
Be added to before Aerobic Pond water outlet medicine unit described in (1) at 1h by Transmission system, and 3 medicine units are added altogether.Flocculant
In the middle of mechanism, medicine unit is placed at about 2m under water, and is suitably adjusted up and down according to actual conditions.
(4) after acting on 3 hours, the nitrate nitrogen in sewage is transferred on the flco that flocculation is produced, and total nitrogen content declines
And reach discharge standard.Sewage outflow Aerobic Pond after treatment enters precipitation unit, and mud-water separation is completed by precipitating.Supernatant
The as treatment water outlet of system.And partial sludge is back in anaerobic bio-treated unit and aerobic biological processing unit, sludge
Reflux ratio is 60%.Remaining sludge is discharged as excess sludge.
(5) 3 medicine units are separated from oxidation ditch by crane, and by the delivery track of top by medicine unit
Transport back in the anaerobic pond of oxidation ditch front end.
(6) reaction time of the solid denitrogenation flocculant of nitrate nitrogen in anaerobic pond is adsorbed with for 3h.In course of reaction,
Nitrate nitrogen on flocculant is resolved in anaerobic pond, and by the use of the organic matter in sewage as carbon source, by the anti-nitre of microorganism
Change effect is converted into gaseous nitrogen.
(7) reacted flocculant can again be transported to aerobe reaction unit by Transmission system in anaerobic pond
In.To ensure the continuous service effect of system, it is necessary to supplement the new denitrogenation flocculation of 2% (mass percent) of initial dosage
Agent, that is, require supplementation with 20g/m3New denitrogenation flocculant.
Inlet and outlet water water quality situation is as follows before and after Sewage Plant transformation：
The initial water inlet of Sewage Plant refers to the water inlet that Sewage Plant most starts, and it also has primary treatment processes before anaerobic pond, such as
Grid, first stage precipitation tank etc..Stably reached using the improved sewage disposal plant effluent of process program of the invention《Town sewage
Treatment plant's pollutant emission standard》The requirement of GB18918-2002 one-level A standards.And compared with traditional modification scheme, transformation
Quantities is small, it is not necessary to newly-increased or enlarging purification structure.
Embodiment 2
Certain rural domestic sewage treatment factory uses A2/O handling process.Because total nitrogen content brings up in its water inlet in recent years
45-50mg/L, treatment water outlet total nitrogen average is 20mg/L, it is impossible to reach the discharge standard of 15mg/L.Therefore institute of the present invention is used
Stating process program carries out upgrading.
Concrete technology protocol step is as follows：
(1) strong-base anion-exchange resin is selected, its nitrate nitrogen adsorption capacity is 155mg/g.The Sewage Plant sets
Meter scale is 5000m3/ d, it is considered to the change of instantaneous delivery, design discharge is 250m per hour3/h.In the middle of processing procedure, initially
Ion exchange resin dosage is 0.4% (mass percent) for processing water, i.e., the ion exchange needed per hour when initial
Amount of resin is 1000kg.The ion exchange resin of 1000kg is added to the screen cloth group with engineering plastics framework and polyethylene material
Into load units in formed a medicine unit.
(2) sewage flows through the anaerobic pond of front end, anoxic pond and Aerobic Pond successively.Residence time is respectively 2h, 2h and 8h.It is dirty
Ammonia nitrogen in water is changed into nitrate nitrogen in Aerobic Pond by the nitrification of microorganism.
(3) Transmission system of medicine unit includes transport vehicle, track, automation control appliance and power facility.By medicine
Be added to before Aerobic Pond water outlet medicine unit described in (1) at 1h by agent unit Transmission system, and 4 medicine units are added altogether.
In the middle of ion exchange resin mechanism, medicine unit is placed at about 2m under water, and is suitably adjusted up and down according to actual conditions.
(4) after acting on 4 hours, the nitrate nitrogen in sewage is transferred on ion exchange resin, and total nitrogen content declines simultaneously
Reach discharge standard.Sewage outflow Aerobic Pond after treatment enters precipitation unit, and mud-water separation is completed by precipitating.Supernatant is
It is the treatment water outlet of system.And partial sludge is back in anaerobism pool unit, return sludge ratio is 40%.Remaining sludge conduct
Excess sludge is discharged.
(5) 4 medicine unit medicine units are separated from Aerobic Pond by transporting equipment, and will be made by delivery track
Ion exchange resin after is transported back in the anaerobic pond of handling process front end.
(6) reaction time of the ion exchange resin of nitrate nitrogen in anaerobic pond is adsorbed with for 4h.In course of reaction, from
Nitrate nitrogen on sub-exchange resin is resolved in anaerobic pond, and by the use of the organic matter in sewage as carbon source, by microorganism
Denitrification is converted into gaseous nitrogen.
(7) reacted ion exchange resin can be transported in Aerobic Pond again by Transmission system in anaerobic pond.
To ensure the continuous service effect of system, it is necessary to supplement the new ion exchange resin of 3% (mass percent) of initial dosage,
Require supplementation with 120g/m3New ion exchange resin.
Inlet and outlet water total nitrogen situation is as follows after Sewage Plant transformation：
The initial water inlet of Sewage Plant refers to the water inlet that Sewage Plant most starts, and it also has primary treatment processes before anaerobic pond, such as
Grid, first stage precipitation tank etc..To its continuous monitoring 1 month, Sewage Plant initially intake total nitrogen average value for 48.5mg/L, and water outlet is total
Nitrogen is 12.7mg/L, reaches the discharge standard of water outlet total nitrogen≤15mg/L, and nitrogen removal rate reaches 73.8%.And change with traditional
The scheme of making is compared, and improvement project amount is small, it is not necessary to newly-increased or enlarging purification structure.
Embodiment 3
Certain Industrial Waste Water Treatments factory is increasingly strict because of Effluent criteria in recent years, and original treatment facility is unable to reach requirement, needs
Propose mark transformation.The problem of the wherein insoluble excessive concentration for being total nitrogen in treatment water outlet.Before transformation, total nitrogen in its water outlet
Concentration average reaches 25.3mg/L, reaches as high as 28.4mg/L.Exceed well over the water outlet total nitrogen concentration that the sewage treatment plant specifies<
The standard of 15mg/L.After testing, total nitrogen more than 90% is nitrate nitrogen.But with traditional remodeling method high cost, and take up an area
Area is big, therefore carries out upgrading using process program of the present invention.
Concrete technology protocol step is as follows：
(1) patent of invention " a kind of denitrogenation flocculant and its preparation method and application " (patent No. is selected：ZL
201410350490.8) the denitrogenation flocculant described in, the solid produced after denitrogenation flocculant effect is transferred to nitrate
When in the relatively low water of nitrogen content, nitrate nitrogen can be re-released into water, and the nitrate nitrogen adsorption capacity of the denitrogenation flocculant is
186mg/g.The design scale of the Sewage Plant is 8000m3/ d, it is considered to the change of instantaneous delivery, design discharge is 400m per hour3/
h.In the middle of processing procedure, initial denitrogenation flocculant dosage is 0.2% (mass percent) for processing water, i.e., per small when initial
When the quality of denitrogenation flocculant that needs be 800kg.The flocculant of 800kg is added to engineering plastics framework and polyethylene material
A medicine unit is formed in the load units of the screen cloth composition of matter.
(2) Transmission system of medicine unit includes transport vehicle, track, automation control appliance and power facility.By medicine
Be added to the medicine unit equipped with denitrogenation flocculant described in (1) in the sedimentation basin before water outlet by the Transmission system of agent unit,
4 medicine units are added altogether.In the middle of pharmacy effect process, medicine unit is placed at about 2m under water, and appropriate according to actual conditions
Adjust up and down.
(3) after acting on 4 hours, the nitrate nitrogen in sewage is transferred on the solid that flocculation is produced, and total nitrogen content declines
And reach discharge standard.
(4) 4 medicine units are separated from sedimentation basin by Transmission system, and is transported to newly-built attached in sedimentation basin
In near small-sized anaerobic jar.The reason for needing newly-built anaerobic jar is that do not have anaerobic bio-treated unit in original handling process.
(5) reaction time of the denitrogenation flocculant of nitrate nitrogen in anaerobic jar is adsorbed with for 4h.In course of reaction, flocculation
Nitrate nitrogen in agent is resolved in anaerobic jar, and gaseous nitrogen is converted into by the denitrification of microorganism in anaerobic jar.
(6) reacted denitrogenation flocculant can be again transported to sedimentation basin by Transmission system and continue to make in anaerobic jar
With.To ensure the continuous service effect of system, it is necessary to supplement the denitrogenation flocculant of 2% (mass percent) of initial dosage,
Require supplementation with 40g/m3Denitrogenation flocculant.
Inlet and outlet water total nitrogen situation is as follows after transformation：
Continuous monitoring 1 month, water outlet total nitrogen is 13.5mg/L, reaches the discharge standard of water outlet total nitrogen≤15mg/L.And with
Traditional modification scheme is compared, and improvement project amount is small, and newly-increased anaerobic jar floor space is also much smaller than traditional modification scheme.
Embodiment 4
As shown in figure 1, a kind of sewage denitrification system, including need to reduce the He of sewage treatment unit 2 of nitrate nitrogen content
Anaerobic bio-treated unit 1 in biological denitrification system, also including medicine unit 4 and can by the medicine unit 4 need drop
Separated back and forth between the sewage of the sewage treatment unit 2 of protonitrate nitrogen content and the sewage of anaerobic bio-treated unit 1 and transported
Transmission system 3, the medicine unit 4 includes load units and is loaded in inside load units nitrate can be removed from water
The medicament of nitrogen.
In another embodiment, the Transmission system is included from the sewage treatment unit for needing reduction nitrate nitrogen content
And/or in the sewage of anaerobic bio-treated unit separate medicine unit separation equipment, such as：Crane, and needing to reduce nitre
The transporting equipment of medicine unit is transported between the sewage treatment unit and anaerobic bio-treated unit of hydrochlorate nitrogen content back and forth, e.g.,
Transport vehicle；The Transmission system also includes the automation control appliance of the control separation equipment and transporting equipment.
In another embodiment, the load units include engineering plastics framework and gathering in engineering plastics framework
Ethene screen cloth.
The foregoing description to specific illustrative embodiment of the invention be in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explaining that certain principles of the invention and its reality should
With so that those skilled in the art can realize and using a variety of exemplaries of the invention and
A variety of selections and change.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of sewage denitrification system, it is characterised in that：Sewage treatment unit and life including needing reduction nitrate nitrogen content
Anaerobic bio-treated unit in thing denitrification system, also including medicine unit and can by the medicine unit need reduce nitric acid
The transmission for separating back and forth and transporting between the sewage of the sewage treatment unit of salt nitrogen content and the sewage of anaerobic bio-treated unit
System, the medicine unit includes load units and the medicine that nitrate nitrogen can be removed from water being loaded in inside load units
Agent；Optionally, the sewage treatment unit for needing to reduce nitrate nitrogen content is good in sedimentation basin or biological denitrification system
Oxygen biological processing unit.
2. sewage denitrification system according to claim 1, it is characterised in that：The medicine that nitrate nitrogen can be removed from water
Agent includes denitrogenation flocculant, strong-base anion-exchange resin, modified activated carbon, modified zeolite, houghite and crosslinking shell
The adsorption capacity scope 30- of at least one and described medicament that nitrate nitrogen can be removed from water in glycan etc. to nitrate nitrogen
300mg/g。
3. sewage denitrification system according to claim 1, it is characterised in that：The Transmission system include from need reduce nitre
In the sewage treatment unit of hydrochlorate nitrogen content and/or the sewage of anaerobic bio-treated unit separate medicine unit separation equipment,
And come between the sewage of sewage treatment unit and the sewage of anaerobic bio-treated unit for needing to reduce nitrate nitrogen content
Backhaul the transporting equipment of defeated medicine unit.
4. sewage denitrification system according to claim 1, it is characterised in that：The load units include engineering plastics framework
And the polyethylene screen cloth in engineering plastics framework.
5. sewage denitrification system according to claim 1, it is characterised in that：The anaerobic bio-treated unit is pond body,
Plug-flow stirring facility is provided with pond, optional anaerobic bio-treated unit can be used directly the original anaerobic organism reaction of Sewage Plant
Pond；The Aerobic biological process unit is pond body, plug-flow stirring facility and aerator is provided with pond, at optional aerobe
Reason unit can be used directly the original aerobe reaction pond of Sewage Plant.
6. a kind of sewage denitrification method, it is characterised in that：Comprise the following steps：
(1) medicament that nitrate nitrogen can be removed from water is loaded into and medicine unit is formed in load units, and by medicine unit
Be added to need reduce nitrate nitrogen content sewage treatment unit sewage in carry out chemicals treatment；It is optionally described to need drop
The sewage treatment unit of protonitrate nitrogen content is the Aerobic biological process unit in sedimentation basin or biological denitrification system；
(2) treatment to sewage is completed after chemicals treatment 1-5h, the nitrate nitrogen in sewage is transferred on medicament, the total nitrogen of sewage
Content declines and reaches Effluent criteria；
(3) medicine unit in step 2 is separated from sewage, and by its physical transfer and is immersed in anaerobic organism reaction
Reacted in unit, the reaction time is about 3-10h.
7. sewage denitrification method according to claim 6, it is characterised in that：The medicine that nitrate nitrogen can be removed from water
Agent includes denitrogenation flocculant, strong-base anion-exchange resin, modified activated carbon, modified zeolite, houghite and crosslinking shell
The adsorption capacity scope 30- of at least one and described medicament that nitrate nitrogen can be removed from water in glycan etc. to nitrate nitrogen
300mg/g。
8. sewage denitrification method according to claim 6, it is characterised in that：Medicine unit is added to needs in step 1
When in the sewage of the sewage treatment unit for reducing nitrate nitrogen content, the initial dosage of medicament is to process water per hour per hour
The 0.05-1% of amount.
9. sewage denitrification method according to claim 6, it is characterised in that：Also include by step 3 by anaerobic organism
Medicament after reaction member reacts separates and is transported to again the sewage treatment unit circulation for needing to reduce nitrate nitrogen content
Use.
10. sewage denitrification method according to claim 6, it is characterised in that：Medicine unit is added to needs in step 1
In the sewage of the sewage treatment unit for reducing nitrate nitrogen content, position is added for nitrate from waste water nitrogen content highest point, tool
Body is aerobic biological processing unit end, and submergence of the medicine unit in sewage is 2-5m under water；At the anaerobic organism
Reason unit is anaerobism pond body, and plug-flow stirring facility is provided with pond, and Dissolved Oxygen concentration Control is in 0-0.5mg/L, anaerobism in anaerobic pond
Sludge concentration is 4000-6000mg/L, and optional Anaerobic Treatment unit is to use the original anaerobic organism reaction tank of Sewage Plant；Institute
Aerobic biological process unit is stated for aerobic pond body, plug-flow stirring facility and aerator are provided with pond, dissolved oxygen is dense in Aerobic Pond
Degree control is 2500-4000mg/L in 0.5-2mg/L, aerobic sludge concentration, and optional aerobic treatment unit can be used directly dirt
The original aerobe reaction pond of water factory.
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| CN106995825A (en) * | 2017-06-05 | 2017-08-01 | 江南大学 | A kind of aerobic sigestion effluent reuse is in the technique of alcoholic fermentation |
| CN112624285A (en) * | 2020-12-02 | 2021-04-09 | 上海电力大学 | Medicament for removing nitrate nitrogen in water body, preparation method and application |
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| CN106746178B (en) | 2020-03-20 |
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