CN108793396A - A kind of denitrification and dephosphorization method of denitrification dephosphorization apparatus, construction method and sewage - Google Patents
A kind of denitrification and dephosphorization method of denitrification dephosphorization apparatus, construction method and sewage Download PDFInfo
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- CN108793396A CN108793396A CN201810024970.3A CN201810024970A CN108793396A CN 108793396 A CN108793396 A CN 108793396A CN 201810024970 A CN201810024970 A CN 201810024970A CN 108793396 A CN108793396 A CN 108793396A
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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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
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
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Abstract
The present invention discloses a kind of sewage water denitrification dephosphorization apparatus, its construction method and the method for carrying out sewage denitrification and dephosphorization using the device, the inventive system comprises tank body and the water distribution area being arranged in tank body, bearing area, packing area and exhalant region, water distribution area, bearing area, packing area and exhalant region are arranged in order from the bottom to top in tank body.The sewage water denitrification dephosphorization apparatus of the present invention is simple in structure, easy to operate, and the cost using apparatus of the present invention treated sewage is low, and nitrogen, tp removal rate are high in sewage, and Nitrogen/Phosphorus Removal is stablized, and is particularly suitable for the advanced nitrogen dephosphorization processing of the low sewage of carbon-nitrogen ratio.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of processing unit and processing method of sewage, especially
It is related to a kind of denitrification dephosphorization apparatus and denitrification and dephosphorization method of sewage.
Background technology
With the quickening of urbanization process and the increasingly raising of living standards of the people, urban wastewater discharge is also increasing rapidly
Add, a large amount of raw sewerages arbitrarily discharge, and cause the pollution getting worse of surface water body.Municipal sewage is Urban Water Environment
One of main source of pollution, the processing of municipal sewage and recycling use extremely urgent.Currently, China's municipal wastewater treatment plant uses
Technique in, be still using various activated sludge processes as mainstream.The processing of traditional life sewage is broadly divided into Physical, chemical method
And bioanalysis.Physical is mainly the undissolved suspended material gone in water removal, and chemical method is directed to add chemical drugs in waste water
Agent reaches purifying water effect by chemical reaction.Bioanalysis refers to the effect using microorganism, and a kind of technology of degradation of organic substances is raw
Object method is mainly used for organic matter and ammonia nitrogen in water removal etc., and compared with Physical and chemical method, biological treatment is in going water removal
There is larger advantage in terms of dissolubility pollutant.
Municipal wastewater treatment plant is largely all made of more traditional technique at present, and treatment effect is poor.As country-level A is discharged
Standard is gradually carried out, and the water outlet of sewage plant must satisfy TP≤0.5mg/L, therefore sewage plant requires increasingly the removal of phosphorus
It is high.Currently, dephosphorization technique is broadly divided into biological phosphate-eliminating technology and chemical dephosphorization technology.Biological phosphate-eliminating technology is generally by poly- phosphorus
Bacterium anaerobic-aerobic alternately in the environment of fully release phosphorus and excessively inhale phosphorus and reach dephosphorization purpose, there is energy saving, operation
The series of advantages such as expense is low.However, biological phosphate-eliminating technology cannot generally meet the requirement of water outlet TP≤0.5mg/L, thus it is dirty
Water factory often needs mating chemical dephosphorization technique reinforced phosphor-removing effect.Common chemical dephosphorization technology mainly add aluminium salt or molysite with
Precipitation reaction occurs for phosphate radical, realizes the direct removal of phosphorus；In addition, aluminium salt or molysite can be formed by hydrolysis and polymerisation it is more
Core hydroxy polymer adsorbs the phosphorus in water, realizes the indirect removal of phosphorus.
Nitrogen in water body mainly by ammonia nitrogen, nitrate nitrogen and nitrous state this in three in the form of exist, when the nitrite nitrogen in water
Excessively high, nitrosamine will be formed with protein combination by drinking this water, be a kind of strong carcinogen.Long-term drinking to body extremely not
Profit.Fish are more sensitive to ammonia nitrogen in water, when ammonia-nitrogen content Gao Shihui causes fish dead.Therefore for municipal sewage plant
Denitrogenation it is more and more important, but the problem of there is low ratio of carbon to ammonium for municipal sewage plant at present, this has become restriction biology
An important factor for nitric efficiency, sewage plant frequently with additional carbon method strengthened denitrification, this processing method treatment effect compared with
It is good, but there is also raising processing costs, it is difficult to the problem of controlling, easily causing secondary pollution.Therefore a kind of advanced treating is found
The method of low carbon-nitrogen ratio sewage has major significance.
Invention content
The purpose of the present invention is being directed to existing sewage denitrification and dephosphorization processing, a kind of taking off for sewage is provided
The denitrification and dephosphorization method of nitrogen dephosphorization apparatus and sewage.The device of the invention can be applied directly in sewage plant facility, device operation at
This is low, realizes the advanced nitrogen dephosphorization of sewage effluents；Using processing unit treated sewage provided by the invention, effluent quality is complete
The requirement of full up foot surface water discharge, nitrogen, tp removal rate are high.Contain sulphur in the packing area of the sewage water denitrification dephosphorization apparatus of the present invention
Sulphur, troilite, zeolite and lime stone, the sulphur autotrophic denitrification technique complementary of the use disadvantage of heterotrophic denitrification carbon source deficiency, very
Good ensure that system has the efficiency of efficient denitrification；Using troilite as electron donor, the phosphor-removing effect of sewage, filler are improved
It also assures the ph stability of sewage in device, improves denitrogenation, dephosphorization efficiency, have for the sulfate generated in denitrification process
Certain removal effect.Apparatus of the present invention are at low cost and Nitrogen/Phosphorus Removal is stablized, and removal efficiency is high, easily operated, is easy to raw
Production and use.
To achieve the purpose of the present invention, one aspect of the present invention provides a kind of construction method of sewage water denitrification dephosphorization apparatus, packet
Include the step of following sequence carries out：
1) tank body filling is handled
It sets gradually water distribution area, bearing area, packing area and exhalant region from the bottom to top in the tank body placed vertically, and is holding
Area is ask to load cobble, in filler of the packing area filling with denitrification dephosphorization function；
2) biofilm is handled
By the water distribution area of sewage introducing device tank body lower part, flow, successively by bearing area, packing area, is carried out to upstream
The Biofilm Colonization of device is handled, until device exhalant region effluent quality maintains to stablize, the nitrogen removal rate of sewage reaches and protects
It holds 75% or more, and total tp removal rate reaches and saves as 80% or more to get sewage denitrification and dephosphorization processing unit.
Wherein, the ratio between water distribution area described in step 1) and the volume of the tank body are 5-10：100, preferably 10：100；Institute
It is 5-10 to state the ratio between volume of tank body of bearing area and described device：100, preferably 10：100；The packing area and the dress
The ratio between volume of tank body set is 60-70：100, preferably 70：100；The ratio between the exhalant region and the volume of the tank body are
10-30：100, preferably 10：100.
In particular, the height of the water distribution area is 5-10cm, preferably 10cm；The height of the bearing area is 5-10cm,
Preferably 8-10cm, further preferably 10cm；The height of the packing area is 60-70cm, preferably 70cm；The exhalant region
Height be 10-30, preferably 10cm.
Wherein, described in step 1) with denitrification dephosphorization function filler include drusen, troilite particle, zeolite and
Lime stone.
In particular, the sulphur is simple substance sulphur particle.
In particular, after mixing by the drusen, troilite particle, zeolite and lime stone, it is filled to packing area,
Form the packing area that intensified denitrification and dephosphorization processing is carried out to sewage.
Especially, the ratio between volume of the drusen, troilite particle, zeolite and lime stone is 3：0.75-3：4.5-
6：0.6-1.5, preferably 3：3：6：1.
Wherein, the ratio between volume of the sulphur and troilite is 3：0.75-3, preferably 3:3；The volume of the sulphur and zeolite
The ratio between be 3：4.5-6 preferably 3：6；The volume of the sulphur and lime stone is prepared as 3：0.6-1.5, preferably 3:1.
Drusen grain size in the especially described packing area is 4-8mm, preferably 4mm.Sulphur iron in the packing area
The grain size of mine is 4-8mm, preferably 4mm.The grain size of zeolite in the packing area is 6-10mm, preferably 6mm；The lime
The grain size of stone is 4-6mm, preferably 4mm.
Especially, in the packing area filler porosity be 25%-50%, preferably 30%.
Wherein, a diameter of 4-6cm of cobble described in step 1), preferably 4cm.
In particular, the tank body is cylinder, high and diameter ratio is 1.5-2：1, preferably 2：1.
In particular, gas vent is provided at the top of the tank body, for sulphur in the sewage disposal process of discharger packing area
The nitrogen generated during autotrophic denitrification.
Especially, water inlet is offered on the side wall of the lower part water distribution area of tank body, sewage is introduced into the water distribution in tank body
Area, water distribution uniformity.Sewage effluents are delivered to from water inlet in the water distribution area of tank body lower part；In the top exhalant region of tank body
Water outlet is offered on side wall, for will pass through denitrogenation dephosphorizing treated water outlet discharge tank body.
In particular, the denitrification dephosphorization apparatus is provided with instead by the way of upward flow, while on the downside of the water distribution area of lower part
Rinse tracheae and backwash water pipe.
Wherein, sewage described in step 2) is low C/N ratios.
In particular, the low C/N is than the sewage for C/N than≤2, preferably C/N is than the sewage for 1~2.
Especially, the sewage selection C/N ratios are less than 2, and preferably C/N is than the sewage treatment plant tail water for 1~2, municipal administration
Sewage treatment plant's sewage, sanitary sewage.
Wherein, the hydraulic detention time of control sewage is 5-7h, preferably 6h in step 2).
In particular, the pH of sewage is 7-8, preferably 7.3-7.6 in step 2).
Another aspect of the present invention provides a kind of construction method of the denitrification dephosphorization apparatus of sewage, including sequentially carry out as follows
Step：
1) tank body filling is handled
It sets gradually water distribution area, bearing area, packing area and exhalant region from the bottom to top in the tank body placed vertically, and is holding
Area is ask to load cobble, in filler of the packing area filling with denitrification dephosphorization function；
2) biofilm is handled
Activated sludge is perfused in tank body and submerged carriers area；Then by the water distribution of sewage introducing device tank body lower part
Area, flow, successively by bearing area, packing area, carry out the Biofilm Colonization processing of device, until device exhalant region goes out to upstream
Water water quality maintains to stablize, and the nitrogen removal rate of sewage reaches and is maintained at 75% or more, and total tp removal rate reaches and saves as
80% or more to get sewage denitrification and dephosphorization processing unit.
Wherein, the activated sludge of step 2) the activated sludge selection municipal sewage plant, preferably Carrousel oxygen
Change the activated sludge of ditch reflux.
In particular, the activated sludge, after concentration in Reperfu- sion to tank body, the MLSS of the activated sludge after concentration is dense
Degree is 18000-20000mg/L, preferably 19000mg/L.
Especially, a concentration of 3000-6000mg/L. of the MLSS of the activated sludge of the municipal sewage plant
In particular, concentration activated sludge submergence tank body 1-2h.
Wherein, sewage described in step 2) is low C/N ratios.
In particular, the low C/N is than the sewage for C/N than≤2, preferably C/N is than the sewage for 1~2.
Especially, the sewage selection C/N ratios are less than 2, and preferably C/N is than the sewage treatment plant tail water for 1~2, municipal administration
Sewage treatment plant's sewage, sanitary sewage.
Wherein, the hydraulic detention time of control sewage is 5-7h, preferably 6h in step 2).
In particular, the pH of control sewage is 7-8, preferably 7.3-7.6 in step 2).
Further aspect of the present invention provides a kind of sewage water intensification denitrification dephosphorization dephosphorization apparatus made of setting up according to the method described above.
Wherein, the ratio between water distribution area and the volume of the tank body are 5-10 in the tank body：100, preferably 10：100；It is described
The ratio between volume of tank body of bearing area and described device is 5-10：100, preferably 10：100；The packing area and described device
The ratio between the volume of tank body be 60-70：100, preferably 70：100；The ratio between the exhalant region and the volume of the tank body are 10-
30：100, preferably 10：100.
In particular, the height of the water distribution area is 5-10cm, preferably 10cm；The height of the bearing area is 5-10cm,
Preferably 8-10cm, further preferably 10cm；The height of the packing area is 60-70cm, preferably 70cm；The exhalant region
Height be 10-30cm, preferably 10cm.
Wherein, the filler with denitrification dephosphorization function loaded in packing area by drusen, troilite particle, zeolite and
Lime stone forms.
In particular, the sulphur is simple substance sulphur particle.
Especially, the ratio between volume of the drusen, troilite particle, zeolite and lime stone is 3：0.75-3：4.5-
6：0.6-1.5, preferably 3：3：6：1.
Wherein, the ratio between volume of the sulphur and troilite is 3：0.75-3, preferably 3:3；The volume of the sulphur and zeolite
The ratio between be 3：4.5-6 preferably 3：6；The volume of the sulphur and lime stone is prepared as 3：0.6-1.5, preferably 3:1.
Drusen grain size in the especially described packing area is 4-8mm, preferably 4mm.Sulphur iron in the packing area
The grain size of mine is 4-8mm, preferably 4mm.The grain size of zeolite in the packing area is 6-10mm, preferably 6mm；The lime
The grain size of stone is 4-6mm, preferably 4mm.
Especially, in the packing area filler porosity be 25%-50%, preferably 30%.
Wherein, a diameter of 4-6cm of cobble described in step 1).
In particular, the tank body is cylinder, high and diameter ratio is 1.5-2：1, preferably 2：1.
Another aspect of the invention provides a kind of carrying out sewage denitrification and dephosphorization processing using above-mentioned sewage water denitrification dephosphorization apparatus
Method, including by low C/N than in sewage transport to above-mentioned sewage denitrification and dephosphorization processing unit, control flow flows up, waterpower
Residence time >=2h.
Wherein, the hydraulic detention time selects 2-9h.
In particular, being 2-4h, preferably 3h in summer hydraulic detention time；Hydraulic detention time is 6-9h in winter.
Especially, in summer by the water distribution area of the lower part of the sewage transport to denitrification dephosphorization apparatus, flow is from bottom to up
Bearing area, packing area are flowed through from water distribution area, into exhalant region, be discharged, wherein control hydraulic detention time is 2-4h, excellent successively
It is selected as 3h.
Especially, in winter by the water distribution area of the lower part of the sewage transport to denitrification dephosphorization apparatus, flow is from bottom to up
Bearing area, packing area are flowed through from water distribution area, into exhalant region, be discharged, wherein control hydraulic detention time is 6-9h, excellent successively
It is selected as 8h.
In particular, the sewage disposal temperature being delivered in denitrification dephosphorization apparatus of the present invention is at 10-35 DEG C, preferably 25-30
℃。
Wherein, the pH for controlling sewage is 7-8, preferably 7.3-7.6.
In particular, the sewage is low C/N ratios.
In particular, the low C/N is than the sewage for C/N than≤2, preferably C/N is than the sewage for 1~2.
Especially, the sewage selection C/N ratios are less than 2, and preferably C/N is than the sewage treatment plant tail water for 1~2, municipal administration
Sewage treatment plant's sewage, sanitary sewage.
Compared with the existing technology, the invention has the advantages that：
1, sulphur, troilite, zeolite and the lime stone used in intensified denitrification and dephosphorization device of the invention is cheap, former
Material is suitable for acquisition, operating mode stable and without adding additional carbon, reduces cost.
2, the zeolite surface of packing area during sewage water intensification denitrification dephosphorization apparatus treated sewage using the present invention
Easily with the cation in water ion exchange occurs for cation, has stronger absorption property to the cation in water, can disappear
Consume the H generated during sulphur autotrophic denitrification+, buffer capacity of the strengthening system to pH.
3, sulphur, troilite, zeolite and lime stone are contained in the packing area of sewage water denitrification dephosphorization apparatus of the invention, with sulphur
It is preferable for denitrification effect during the autotrophic denitrification of electron donor；It is given birth to by the autotrophic denitrification product of electron donor of troilite
At in object, there are Fe3+, strengthen the phosphor-removing effect of device, while sulphur autotrophic denitrification reaction process generates H+, device packing area
Interior lime stone can ensure the stabilization of the pH of sewage in device, be more advantageous to the denitrogenation of device.Lime stone exists for device
Denitrogenation provide certain basicity, and have certain removal effect for the sulfate generated in denitrification process.
4, for low C/N using the present invention than sewage water denitrification dephosphorization apparatus treated sewage, the nitric efficiency of sewage is high, nitrogen removal
Rate is more than 91%, reaches 91.7-99.5%；Sewage dephosphorization is efficient, and tp removal rate is more than 90%, reaches 90.6-99.2%.
5, sewage water intensification denitrification dephosphorization apparatus of the invention combines the nitrogen phosphorus ligands of sewage, while going to denitrogenate and phosphorus.Tank
When denitrogenation processing occurring in vivo, when troilite provides electron donor, denitrification reaction is completed under anaerobic：NO3 -+13FeS2+
23H2O→12N2+23SO4 2-+13Fe(OH)3+13H+；When sulphur provides electron donor, denitrification reaction is completed under anaerobic condition：
It is that thiobacillus denitrificans in filter tank complete denitrification reaction under anaerobic by electron acceptor of nitrate：55S+50NO3 -+
38H2O+20CO2+4NH4 +→4C5H7O2N+25N2+55SO4 2-+64H+；When troilite provides electron donor for denitrification reaction, production
Fe3+ has been given birth to, can have been combined with the phosphate radical in water and generate the slightly solubilities substances such as sulphate of iron, thus by the phosphorus ligands in water.
Description of the drawings
Fig. 1 is structural schematic diagram when denitrification dephosphorization apparatus provided by the invention uses.
Reference sign
1, sewage storage tank；2, intake pump；3, water distribution area；4, bearing area；5, packing area；6, exhalant region, 7, gas vent；8,
Water inlet pipe；9, outlet pipe；10, tank body.
Specific implementation mode
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.People in the art
Member it should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are each fallen in protection scope of the present invention.
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
The present invention handles low C/N than sewage using sewage water denitrification dephosphorization apparatus, carries out intensified denitrification and dephosphorization processing, is intaking
Under the action of pump 2, the sewage effluents being stored in sewage storage tank 1 are delivered to sewage water denitrification of the present invention from water inlet pipe 8 and are removed
The water distribution area 3 of phosphorus device tank body lower part, flow from bottom to up followed by bearing area 4, packing area 5 after, into tank body top
Then exhalant region 6 passes through water outlet, the denitrification dephosphorization apparatus of the present invention is flowed out from outlet pipe 9.Water inlet pipe, outlet pipe are set respectively
It sets on tank body lower part, top.
Sewage is introduced into water distribution area, flows through bearing area and packing area, which uses the water intake mode of upward flow.Sewage exists
By carrying out water distribution uniformity into water distribution area excessively, big grain size contaminant particle is trapped into bearing area excessively, while bearing area has one
The effect of fixed water distribution uniformity, is then passed through the denitrogenation dephosphorizing that packing area carries out sewage, finally passes through exhalant region and stands, discharge
Water.
As shown in Figure 1, the sewage water intensification denitrification dephosphorization apparatus of the present invention includes the tank body in cylindrical shape placed vertically
10, inside set gradually water distribution area 3, bearing area 4, packing area 5, exhalant region 6 from bottom to top, top is provided with gas vent 7,
Processing unit is flowed through in the process since nitrogen caused by the reaction of sulphur autotrophic denitrification occurs for sewage to be discharged；In tank body lower part
Water distribution area 3 side wall on open up water inlet (not shown), water inlet is located at the lower part of tank bottom, water inlet and water inlet pipe 8
Sewage in sewage effluents storage tank is introduced the water distribution area of tank body by connection, water inlet pipe from water inlet；It is discharged on tank body top
Water outlet (not shown) is opened up on the side wall in area 6, water outlet is connect with outlet pipe 9.
For the tank body of the present invention other than selecting cylindrical shape, the tank body of other any shapes is suitable for the present invention, example
Such as rectangular-shape, prism-shaped.
The height of tank body is 1.5-2 with diameter ratio：1；The ratio between volume of tank body of water distribution area and described device is 5-10：
100, preferably 10：100；The ratio between volume of tank body of the bearing area and described device is 5-10：100, preferably 10：100；
The ratio between volume of tank body of the packing area and described device is 60-70：100, preferably 70：100.
It is illustrated so that the height of tank body is 100cm as an example in the specific embodiment of the invention, the height of the packing area
For 60-70cm, preferably 70cm；The height of the exhalant region is 10-30cm, preferably 10cm；The height of the water distribution area is
5-10cm, preferably 10cm；The height in the supporting layer area is 5-10cm, preferably 10cm.
Water distribution area primarily to carry out water distribution it is uniform, be conducive to the treatment effect of denitrification dephosphorization apparatus.Water distribution area with
Closely, sewage enters bearing area after water distribution area for bearing area.
The height of bearing area is 5-10cm, preferably 8-10cm, further preferably 10cm, by the ovum of a diameter of 4-6cm
Stone forms, wherein the diameter of the cobble is preferably 4cm.
When water filters, the bearing area is used to prevent the filterins media run-off of packing area and blocks filter and pipeline, in filter tank
The cobble bearing area that packing area is laid with below, the paving that water distribution uniformity is may also function as in backwash help effect and keep backwash steady
It is fixed to carry out.
The zeolite that troilite that drusen that packing area is 4-8mm by grain size, grain size are 4-8mm, grain size are 6-10mm
The lime stone that grain size is 4-6mm forms, and is uniformly mixed, and forms the packing area that porosity is 25-50%.The height of packing area is
60-70cm, preferably 70cm.
Drusen, troilite particle, zeolite and lime stone after mixing, are filled to packing area, formed to sewage into
The packing area of row intensified denitrification and dephosphorization processing.The volume of the drusen, troilite particle, zeolite and lime stone in packing area
The ratio between be 3：0.75-3：4.5-6：0.6-1.5, preferably 3：3：6：1.
The height of exhalant region is 10-30cm, preferably 10cm.It is provided with exhaust at the top of top, that is, tank body of exhalant region
Mouth 7, for the exhaust gas generated in sewage denitrification and dephosphorization processing procedure to be discharged.
The operation principle of sewage water denitrification dephosphorization apparatus of the present invention is as follows：
The water outlet that sewage plant is stored in sewage effluents storage tank passes through water inlet pipe 8 from the present invention under the action of intake pump
The water inlet (not shown) of the side wall of the water distribution area 3 of 10 lower part of device tank body flows into tank interior, water distribution uniformity, flow from
Under it is supreme followed by bearing area 4, packing area 5, exhalant region 6 is flowed into, from the water outlet (not shown) on exhalant region side wall
Tank body is flowed out by outlet pipe 8, obtains the water outlet handled by advanced nitrogen dephosphorization.
Sewage is transported into the tank body lower part of denitrification dephosphorization apparatus by water inlet pipe, is evenly distributed successively by water distribution area
It into bearing area, packing area, is in contact with drusen, troilite, zeolite, the lime stone in packing area, is carried out in the region
Denitrogenation, dephosphorisation reaction complete denitrification reaction under anaerobic when troilite provides electron donor：NO3 -+13FeS2+23H2O
→12N2+23SO4 2-+13Fe(OH)3+13H+；When sulphur provides electron donor, denitrification reaction is completed under anaerobic condition：Packing area
Thiobacillus denitrificans complete denitrification reaction under anaerobic by electron acceptor of nitrate：55S+50NO3 -+38H2O+20CO2+
4NH4 +→4C5H7O2N+25N2+55SO4 2-+64H+.And when troilite provides electron donor for denitrification reaction, produce Fe3 +, can be combined with the phosphate radical in water and generate the slightly solubilities substances such as sulphate of iron, thus by the phosphorus ligands in water.The Fe of generation3+One
Aspect forms the salt of slightly solubility with phosphate radical, intense hydrolysis on the one hand occurs by dissolving and absorbing water, and sent out while hydrolysis
Raw each polymer reaction, generates the multinuclear hydroxo complex with longer linear structure, passes through charge neutrality, adsorption bridging and wadding
The volume effect of sweeping of body makes coacervation of colloid, then by precipitating separation by phosphorus ligands.
With reacting for packing area microorganism and sewage, pH declines, and zeolite has stronger absorption to the cation in water
Ion exchange easily occurs with the cation in water for the cation of performance, zeolite surface, is produced during consumption sulphur autotrophic denitrification
Raw H+, buffer capacity of the strengthening system to pH；And the lime stone of packing area provides certain basicity for the denitrogenation of device,
And there is certain removal effect for the sulfate generated in denitrification process, it is ensured that the stabilization of sewage pH in device, more
Be conducive to the denitrogenation of device.The presence of lime stone.
Apparatus of the present invention are at low cost and Nitrogen/Phosphorus Removal is stablized, and removal efficiency is high, easily operated, is readily produced and makes
With.
The present invention select sulphur, troilite, zeolite, lime stone as instead using to sewage disposal is carried out by the way of upper
Substrate and biofilm carrier, addition is answered to flow into water distribution area in the packing area of denitrification processing device, water from water inlet pipe, pass through bearing area
Packing area is flowed into, nitrate from waste water, phosphate are removed by the biological treatment of the packing area of device.Filled with sulphur
The sulphur autotrophic denitrification bacterium of the device wetland reaction zone middle and lower part of particle, the attachment of drusen surface improves ammonia nitrogen removal frank, and
And treatment region in add zeolite to the cation in water have stronger absorption property, zeolite surface cation easily with water
In cation ion exchange, the H generated during consumption sulphur autotrophic denitrification occurs+, buffer capacity of the strengthening system to pH.
It maintains water inlet carbon-nitrogen ratio between 1~2 in reaction, limits the proliferation of heterotrophic denitrification bacterium.Maintaining reaction temperature
Between 25~35 DEG C.
Embodiment 1
1, tank body is loaded
As shown in Figure 1, the tank body of the denitrification dephosphorization apparatus of the present invention is cylinder, ratio of height to diameter 2:1, it sets at the top of body
Set gas vent 10；It is divided into water distribution area, bearing area, packing area and the top exhalant region of lower part successively from the bottom to top in tank body.
Wherein, the height of packing area is 70cm, interior to load drusen, troilite particle, zeolite and lime stone, wherein
The grain size of drusen is 4-8mm, the grain size of troilite is 4-8mm, the grain size of zeolite is 6-10mm, the grain size of lime stone is 4-
6mm, wherein sulphur, troilite, zeolite and lime stone Volume fraction be 3：3：6:1；The porosity of filler is in packing area
30%；
The height of bearing area is 10cm, the interior cobble for loading a diameter of 4-6cm；The water distribution area height of tank body lower part is
10cm；The exhalant region height on top is 10cm.
Separated by the supporting plate with hole between bearing area and water distribution area, cobble is shelved on supporting plate, with water distribution
Area detaches；Separated by the filtrate plate with hole between bearing area and packing area, by the filler of the cobble of bearing area and packing area
Mixture detaches.
There are water inlet, sewage effluents to enter lower part water distribution from the water inlet on the side wall of the water distribution area lower part of tank body lower part
In area；There is water outlet in the upper portion side wall of top exhalant region, the water by advanced nitrogen dephosphorization is discharged from the water outlet；Tank body
Top is equipped with gas vent 7, and effect is the nitrogen generated during sulphur autotrophic denitrification is discharged.
2, biofilm is handled
Sewage of the C/N of sewage treatment plant than≤2 is introduced into water distribution area from the water inlet of the tank body lower part of apparatus of the present invention,
Flow flows through bearing area, packing area to upstream, and into after exhalant region, the water outlet by being opened in tank body top flows out, and passes through
Adjusting inflow, control hydraulic detention time is 6h (be usually 5-7h), continuous operation 30 days (being usually 20-40 days), up to
Stable effluent quality is to get sewage water intensification denitrification dephosphorization apparatus of the present invention.
The daily monitoring device effluent quality in biofilm processing procedure, detect COD, total nitrogen and the ammonia nitrogen of water outlet, total phosphorus,
The average value of nitrate nitrogen, ammonium nitrogen, nitrite nitrogen concentration, calculates corresponding removal rate, and the effluent quality of apparatus of the present invention maintains
Stablize, the nitrogen removal rate of sewage reaches and is maintained at 75% or more, and total tp removal rate reaches and is stored in 80% or more, guarantor
Fixed, the of the invention sewage water intensification denitrification dephosphorization apparatus component that keeps steady is completed.
3, denitrogenation dephosphorizing is handled
Strengthened denitrification processing processing is carried out for being discharged between the filtering cloth filtering pool of sewage treatment plant of Changge City of Henan Province, it will
Water outlet is stored in sewage storage tank 1 between filtering cloth filtering pool, wherein sewage water, water quality such as table 1.
The sewage being stored in sewage storage tank 1 enters apparatus of the present invention lower part by water inlet pipe 8 through intake pump 2 from water inlet
Water distribution area 3, then from the bottom to top followed by bearing area 4 and packing area 5, finally top exhalant region 6 precipitation after, from water outlet
It mouthful is flowed out by outlet pipe 9, control sewage hydraulic detention time in the device is (2-4h) 3h, temperature in system operation
It is maintained 25-30 DEG C, inlet flow-patterm maintains essentially in 7.3-7.6, between DO maintains essentially in 1.8-2.2, completes entire denitrogenation and removes
Phosphorus process.
After the processing of denitrification dephosphorization apparatus of the present invention, effluent quality (COD, nitrate, ammonia nitrogen, total phosphorus) measures sewage
As a result be shown in Table 1.Wherein, according to HJ/T 399-2007《The measurement rapid-digestion spectrophotometry of water chemical oxygen demand》Inspection
Survey the COD (COD) in water；According to GB 13200-1991《The measurement of water turbidity》Detect the turbidity of water；According to
GB11894-89《The measurement alkaline chitinase of water quality total nitrogen clears up ultraviolet spectrophotometry》Detect total nitrogen (TN) in water；According to
GB 11893-89《The measurement ammonium molybdate spectrophotometric method of water quality total phosphorus》Detect total phosphorus (TP) in water；According to HJ 535-2009
《The measurement Berthelot spectrophotometry of Water quality ammonia nitrogen》Detect ammonia nitrogen (NH in water4 +-N)；According to HJ/T 346-2007《Water quality
Nitrate measures ultraviolet spectrophotometry》Detect nitrate nitrogen (NO in water3 --N)；According to GB 7493-87《Water quality nitrite
Measurement spectrophotometry》Detect water Nitrite Nitrogen (NO2 --N)；The measurement of oxygen in water uses the septum electrode of Hash
Method detects oxygen in water (DO).
Water-quality determination result before and after 1 sewage water of table and sewage disposal
It was found from the water-quality determination result of table 1：Intensified denitrification and dephosphorization device processing municipal wastewater water outlet using the present invention,
Removal effect is notable, and denitrogenation, phosphor-removing effect are apparent, and wherein nitrate removal rate can reach 90% or more；Nitrogen removal rate is
91.7% or more；Total tp removal rate is 90.6% or more, and water outlet pH maintains essentially in 6.87-6.93.
And hydraulic detention time is appropriately extended, minimum water outlet TN, TP a concentration of 0.28mg/L, the 0.014mg/ that can be obtained
L, denitrogenation dephosphorizing efficiency respectively reach 99.5%, 99.2%.
Apparatus of the present invention treated sewage for a period of time after, carry out backwash processing, backwash process：Clear water is in recoil pump
Under the action of enter lower part water distribution area, gas under the action of air pump enter bearing area, carry out combined water and air backwash, air water connection
Conjunction from bottom to top flows through bearing area and packing area, is rinsed to packing area, is finally flowed out from water outlet.
Embodiment 1A
It is 4h, system fortune in addition to controlling the hydraulic detention time of sewage in the device in step 3) denitrogenation dephosphorizing processing step
Temperature is maintained 25-30 DEG C during row, and inlet flow-patterm maintains essentially in 7.3-7.6, and DO maintains essentially between 1.8-2.2 it
Outside, remaining is same as Example 1.
Embodiment 2
1, tank body is loaded
It is same as Example 1.
2, biofilm is handled
2-1), after concentrating the anaerobic activated sludge of municipal sewage plant, concentration activated sludge is made, wherein concentration is lived
Property sludge a concentration of 18000-20000mg/L of MLSS (preferably 19000mg/L)；
2-2) into tank body, from top to bottom then perfusion concentration activated sludge impregnates until packing layer is totally submerged
1.5h (being usually 1-2h)；
2-3) and then by sewage of the C/N of sewage treatment plant than≤2 from the water inlet of the tank body lower part of apparatus of the present invention draw
Enter water distribution area, flow flows through bearing area, packing area to upstream, into after exhalant region, by the water outlet for being opened in tank body top
Outflow, by adjusting inflow, control hydraulic detention time is 6h (being usually 5-7h), continuous operation 10-20 days (preferably 15
It), until stable effluent quality is to get sewage water intensification denitrification dephosphorization apparatus of the present invention.
The present invention specifically selects in the mode activated sludge of municipal sewage plant for the municipal administration of Changge City of Henan Province
The activated sludge that Carrousel oxidation ditch flows back in sewage treatment plant
The present invention activated sludge with out of Changge City of Henan Province municipal sewage plant Carrousel oxidation ditch flow back
Activated sludge for illustrate, the anaerobic activated sludge of a concentration of 3000-6000mg/L of other MLSS is suitable for this hair
It is bright, especially the activated sludge of other municipal sewage plants, returnedactivatedsludge, be suitable for the present invention, such as municipal administration is dirty
Water treatment plant's oxidation ditch water outlet sludge, municipal sewage plant biological contact oxidation pond water outlet sludge, municipal wastewater processing
The returned sludge of factory's secondary settling tank is suitable for the present invention.
The daily monitoring device effluent quality in biofilm processing procedure, detect COD, total nitrogen and the ammonia nitrogen of water outlet, total phosphorus,
The average value of nitrate nitrogen, nitrite nitrogen concentration calculates corresponding removal rate, and the effluent quality of apparatus of the present invention maintains to stablize, dirty
The nitrogen removal rate of water reaches and is maintained at 75% or more, and total tp removal rate reaches and is stored in 80% or more, keeps stablizing, this
The sewage water intensification denitrification dephosphorization apparatus of invention, which is set up, to be completed.
3, denitrogenation dephosphorizing is handled
It is same as Example 1.
After the processing of denitrification dephosphorization apparatus of the present invention, effluent quality (COD, nitrate, ammonia nitrogen, total phosphorus) measures sewage
As a result be shown in Table 2.
Water-quality determination result before and after 2 sewage water of table and sewage disposal
Embodiment 2A
It is 3.5h, system in addition to controlling the hydraulic detention time of sewage in the device in step 3) denitrogenation dephosphorizing processing step
Temperature is maintained 25-30 DEG C in operational process, and inlet flow-patterm maintains essentially in 7.3-7.6, and DO maintains essentially between 1.8-2.2 it
Outside, remaining is same as Example 2.
Embodiment 3
1, tank body is loaded
As shown in Figure 1, the tank body of the denitrification dephosphorization apparatus of the present invention is cylinder, ratio of height to diameter 2:1, it sets at the top of body
Set gas vent 10；It is divided into water distribution area, bearing area, packing area and the top exhalant region of lower part successively from the bottom to top in tank body.
Wherein, the height of packing area is 70cm, interior to load drusen, troilite particle, zeolite and lime stone, wherein
The grain size of drusen is 4-8mm, the grain size of troilite is 4-8mm, the grain size of zeolite is 6-10mm, the grain size of lime stone is 4-
6mm, wherein sulphur, troilite, zeolite and lime stone Volume fraction be 3：2.5：5:1.5；The hole of filler in packing area
Rate is 35%；
The height of bearing area is 10cm, the interior cobble for loading a diameter of 4cm；The water distribution area height of tank body lower part is 5cm；
The exhalant region height on top is 15cm.
There are water inlet, sewage effluents to enter lower part water distribution from the water inlet on the side wall of the water distribution area lower part of tank body lower part
In area；There is water outlet in the upper portion side wall of top exhalant region, the water by advanced nitrogen dephosphorization is discharged from the water outlet；Tank body
Top is equipped with gas vent 10, and effect is the nitrogen generated during sulphur autotrophic denitrification is discharged.
2, biofilm is handled
It is same as Example 1.
3, denitrogenation dephosphorizing is handled
Other than hydraulic detention time is 4h, remaining is same as Example 1.
After the processing of denitrification dephosphorization apparatus of the present invention, effluent quality (COD, nitrate, ammonia nitrogen, total phosphorus) measures sewage
As a result be shown in Table 3.
Water-quality determination result before and after 3 sewage water of table and sewage disposal
Embodiment 3A
1, tank body is loaded
It is same as Example 3.
2, biofilm is handled
It is identical as the step 2 of embodiment 2, biofilm processing.
3, denitrogenation dephosphorizing is handled
In addition to control sewage hydraulic detention time in the device is 3.7h, temperature is maintained 25- in system operation
30 DEG C, inlet flow-patterm maintains essentially in 7.3-7.6, and except DO is maintained essentially between 1.8-2.2, remaining is same as Example 3.
After the processing of denitrification dephosphorization apparatus of the present invention, effluent quality (COD, nitrate, ammonia nitrogen, total phosphorus) measures sewage
As a result be shown in Table 3.
Claims (10)
1. a kind of construction method of the denitrification dephosphorization apparatus of sewage, characterized in that include the steps that following sequence carries out：
1) tank body filling is handled
Set gradually water distribution area, bearing area, packing area and exhalant region from the bottom to top in the tank body placed vertically, and in bearing area
Cobble is loaded, in filler of the packing area filling with denitrification dephosphorization function；
2) biofilm is handled
By the water distribution area of sewage introducing device tank body lower part, flow, successively by bearing area, packing area, carries out device to upstream
Biofilm Colonization processing, until device exhalant region effluent quality maintains to stablize, the nitrogen removal rate of sewage reaches and is maintained at
75% or more, and total tp removal rate reaches and saves as 80% or more to get sewage denitrification and dephosphorization processing unit.
2. a kind of construction method of the denitrification dephosphorization apparatus of sewage, characterized in that include the steps that following sequence carries out：
1) tank body filling is handled
Set gradually water distribution area, bearing area, packing area and exhalant region from the bottom to top in the tank body placed vertically, and in bearing area
Cobble is loaded, in filler of the packing area filling with denitrification dephosphorization function；
2) biofilm is handled
Anaerobic activated sludge is perfused in tank body and submerged carriers area；Then by the water distribution of sewage introducing device tank body lower part
Area, flow, successively by bearing area, packing area, carry out the Biofilm Colonization processing of device, until device exhalant region goes out to upstream
Water water quality maintains to stablize, and the nitrogen removal rate of sewage reaches and is maintained at 75% or more, and total tp removal rate reaches and saves as
80% or more to get sewage denitrification and dephosphorization processing unit.
3. construction method as claimed in claim 1 or 2, characterized in that the body of water distribution area described in step 1) and the tank body
The ratio between product is 5-10：100；The ratio between the bearing area and the volume of the tank body are 5-10：100；The packing area and the tank
The ratio between volume of body is 60-70：100.
4. construction method as claimed in claim 1 or 2, characterized in that filling out with denitrification dephosphorization function described in step 1)
Material includes drusen, troilite particle, zeolite and lime stone.
5. construction method as claimed in claim 4, characterized in that the drusen, troilite particle, zeolite and lime stone
The ratio between volume is that the ratio between volume is 3：0.75-3：4.5-6：0.6-1.5.
6. construction method as described in claim 1, characterized in that control waterpower in biofilm processing procedure described in step 2) and stop
It is 5-7h to stay the time.
7. construction method as claimed in claim 2, characterized in that control waterpower in biofilm processing procedure described in step 2) and stop
It is 5-7h to stay the time.
8. a kind of sewage water intensification denitrification dephosphorization processing unit, characterized in that set up according to any the methods of such as claim 1-7
It forms.
9. a kind of sewage water intensification denitrification dephosphorization treatment method, characterized in that including by low C/N than sewage transport to such as claim
In sewage denitrification and dephosphorization processing unit described in 8, control flow flows up, hydraulic detention time >=2h.
10. intensified denitrification and dephosphorization processing method as claimed in claim 9, characterized in that be delivered to intensified denitrification and dephosphorization device
In sewage disposal temperature at 10-35 DEG C.
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Application publication date: 20181113 |