CN203498162U - Denitrification biofilter device with low energy consumption - Google Patents
Denitrification biofilter device with low energy consumption Download PDFInfo
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- CN203498162U CN203498162U CN201320651184.9U CN201320651184U CN203498162U CN 203498162 U CN203498162 U CN 203498162U CN 201320651184 U CN201320651184 U CN 201320651184U CN 203498162 U CN203498162 U CN 203498162U
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000011001 backwashing Methods 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims description 39
- 229910021536 Zeolite Inorganic materials 0.000 claims description 36
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 36
- 239000010457 zeolite Substances 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 20
- 238000009287 sand filtration Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 30
- 229910052799 carbon Inorganic materials 0.000 abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 27
- 239000001301 oxygen Substances 0.000 abstract description 27
- 229910052760 oxygen Inorganic materials 0.000 abstract description 27
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 12
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 14
- 239000002351 wastewater Substances 0.000 description 11
- 241000894006 Bacteria Species 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241000108664 Nitrobacteria Species 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- -1 nitrite anions Chemical class 0.000 description 3
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- GFEWRKPOYXKQKX-UHFFFAOYSA-I [C+4].C(C)(=O)[O-].[Na+].C(C)(=O)[O-].C(C)(=O)[O-].C(C)(=O)[O-].C(C)(=O)[O-] Chemical compound [C+4].C(C)(=O)[O-].[Na+].C(C)(=O)[O-].C(C)(=O)[O-].C(C)(=O)[O-].C(C)(=O)[O-] GFEWRKPOYXKQKX-UHFFFAOYSA-I 0.000 description 2
- IPQVRLSXWJPESU-UHFFFAOYSA-N [N].ON=O Chemical compound [N].ON=O IPQVRLSXWJPESU-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000028804 PERCHING syndrome Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000037149 energy metabolism Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Y02W10/12—
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model discloses a denitrification biofilter device with the low energy consumption and belongs to the field of wastewater treatment. The denitrification biofilter device comprises an adjusting tank, a reactor body and a water storage tank and also comprises a first doser, a second doser, a back washing pump, a water inlet pump and a fan. By utilizing the denitrification biofilter device, an inhibiting effect on denitrification by dissolution oxygen in inlet water can be efficiently reduced, and an externally added carbon source can be reduced on the premise of ensuring the total nitrogen concentration of outlet water to be basically unchanged. Compared with the prior art, for the denitrification biofilter device, TN (total nitrogen) in the outlet water can be lower than 3mg/L under the conditions of high hydraulic loading and the low energy consumption. The denitrification biofilter device is small in floor area, stable in treatment effect, efficient, low in consumption and the like.
Description
Technical field
The invention belongs to field of waste water treatment, specifically, the denitrification bio-filter device that relates to a kind of less energy-consumption, more particularly, relate to a kind of novel denitrification filter pool device and method, can effectively reduce water inlet dissolved oxygen, at the denitrification bio-filter device that guarantees to reduce under the prerequisite that water outlet total nitrogen concentration is substantially constant additional carbon.
Background technology
Along with the quickening of Chinese Urbanization's speed, the water pollution problems in China city is day by day serious.COD, BOD can effectively remove in municipal sewage plant
5, NH
3the objectionable impuritiess such as-N, but in secondary effluent from sewage treatment plant, often contain the nutritive substances such as certain density nitrate nitrogen, phosphorus, while directly entering river course and lake, can cause the accumulation of water nutrition material, there is the risk that causes wawter bloom and body eutrophication.< < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) the standard one-level A standard that China is carrying out at present, has proposed requirements at the higher level to processing rear sewage quality.The 12 5 years (2011-2015) planning outline > > of < < People's Republic of China (PRC) national economy and social development determines during " 12 ", country will strengthen major area, industry water pollutant reduces discharging dynamics, ammonia nitrogen requires reduction ratio to be not less than 10% compared with 2010, and in lake and reservoir enforcement total nitrogen or the control of total phosphorus total emission volumn of eutrophication.All parts of the country have also been put into effect a series of policies about energy-saving and emission-reduction and estate planning in succession.The enforcement of the binding indicators such as the environmental management policies of increasingly stringent and standard and total amount of pollutant reduction, has proposed new requirement to the treatment effect of existing sewage treatment facility, in the urgent need to carrying out technology upgrading transformation.
The advanced treatment of municipal effluent is the effective way that alleviates water body nitrogen, phosphorus nutrition thing pollution load.The features such as wherein denitrification bio-filter is because floor space is little, easy to operate, operational management is convenient, flexible, and treatment effect is stable are used to the advanced treatment of nitrogen.Its principle is: utilize microbial film accompanying on the interior filtrate of reactor under the condition of anoxic (not having molecular state dissolved oxygen), nitrite anions is become to nitrogen, nitrogen protoxide or nitrous oxide with reducing nitrate radical.
Denitrifying bacterium majority is facultative bacteria, and when having dissolved oxygen to exist, denitrifying bacteria decomposing organic matter utilizes molecular oxygen as final electron acceptor(EA).Without dissolved oxygen in the situation that, denitrifying bacteria utilizes nitrate and nitrite as the electron acceptor(EA) in energy metabolism, O
2as hydrogen acceptor, generate H
2o and OH
-basicity, organism provides energy oxidized stable as carbon source and electron donor.
The people such as M.A.Gomez (Effect of dissolved oxygen concentration on nitrate removal from groundwater using a denitrifying submerged filter.Journal of Hazardous Materials2002(90): the existence of 267-278.) finding oxygen can suppress denitrification denitrogenation effect, and exists the increase of water outlet nitrite.Due to secondary effluent ubiquity dissolved oxygen, the dissolved oxygen in water inlet can cause a large amount of consumption of denitrification bio-filter additional carbon, has increased running cost.In addition, conventional denitrification biological filter is limited to the clearance of ammonia nitrogen in waste water, and water outlet total nitrogen concentration is often subject to the impact of influent ammonia nitrogen loading and is unstable.
For in order to be effective and cost-saving, now how strict more thinking be the addition of control carbon source, China Patent No.: 201110161740.X for example, open day on 01 25th, 2012, the patent application document that a name is called device for optimizing control of carbon source adding with denitrified bacteria filter technology and method is disclosed, this invention relates to a kind of device for optimizing control of carbon source adding with denitrified bacteria filter technology, be provided with denitrification bio-filter, in this filter tank, be provided with online water inlet nitrate sensor, online water inlet dissolved oxygen sensor and online water outlet nitrate sensor, also be provided with nitrate determinator and dissolved oxygen meter, process controller, industrial computer, be provided with carbon source case, frequency conversion carbon source pump, carbon source under meter, carbon source adds the method for optimal control, and its feature comprises the following steps: 1) water inlet, 2) parameter is processed judgement, 3) frequency transformer is processed frequency f t, 4) the excessive process that adds of prevention and control carbon source, 5) steady running process, 6) trouble diagnosis, 7) backwash process.This invention is applicable to advanced treatment of wastewater and nitrogenous Industrial Wastewater Treatment.Chinese Patent Application No.: 201110161733.X, date of publication on November 23rd, 2011, disclose a name and be called the device of municipal effluent secondary treatment yielding water advanced treatment and the patent application document of technique, the denitrification bio-filter device that this invention relates to is provided with carbon source case, adjustable flow frequency conversion adds pump and pipeline.By the data of online nitrate nitrogen densitometer and online COD densitometer, carry out the addition that carbon source is controlled in adjusting that frequency conversion adds pump.These patents are controlled cost by optimizing carbon source addition above, but and fail reduce water inlet dissolved oxygen and cause carbon source consumption large, still exist cost high, waste the problem of a large amount of carbon sources.
Summary of the invention
1. the technical problem that invention will solve
For the dissolved oxygen of intaking in prior art, can cause a large amount of consumption of denitrification bio-filter additional carbon, increased running cost, and conventional denitrification biological filter is limited to the clearance of ammonia nitrogen in waste water, water outlet total nitrogen concentration is often subject to the impact of influent ammonia nitrogen loading and unsettled problem, a kind of denitrification bio-filter device of less energy-consumption is provided, can effectively reduce water inlet dissolved oxygen, guarantee to reduce the economical and efficient of additional carbon, stable denitrification bio-filter device under the prerequisite that water outlet total nitrogen concentration is substantially constant.
2. technical scheme
Object of the present invention is achieved through the following technical solutions.
A kind of denitrification bio-filter device of less energy-consumption, comprise equalizing tank, reactor body and tank, also comprise the first doser, the second doser, backwashing pump, intake pump and blower fan, the first described doser is provided with a chemical feed pipe, and chemical feed pipe stretches in equalizing tank; Described equalizing tank comprises raw water inlet and water outlet, and the water outlet of equalizing tank is connected with the top of intake pump, reactor body successively by pipeline; Described reactor body is columnar structure, and inside comprises even water distributor, zeolite filler layer, buffer layer, the extra large sand filtration bed of material and supporting layer from top to bottom successively; Between described zeolite filler layer and buffer layer, be also provided with filler supporting plate; On the sidewall of described buffer layer, also have back flushing water outlet; The bottom of described reactor body is provided with processes water water outlet and backwashing water water-in, processes water water outlet and by pipeline, is connected with tank respectively with backwashing water water-in; Described backwashing pump is on the pipeline between backwashing water water-in and tank; The second described doser is connected on the sidewall of buffer layer by pipeline; Described zeolite filler layer is comprised of zeolite, selects particle diameter 4-8mm, density 1.9-2.6g/cm
3, porosity>=48% and specific surface area 570-670m
2the zeolite of/g.Because high-specific surface area and voidage provide the huge space of perching, make a large amount of microorganic adhesion on filler, and at filling surface amount reproduction.
Preferably, described even water distributor is comprised of be responsible for-arm-water distributing pore, and the downside of every arm is evenly arranged the isodiametric apertures of pitch-row such as a plurality of.
Preferably, described supporting layer is comprised of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.
Preferably, the described extra large sand filtration bed of material is comprised of extra large sand, the particle diameter 2-3mm of extra large sand.Sea sand is corrosion-resistant, particle shape rounding, siliceous height, and hardness is strong, has good filter effect, can extend the feature of changing the filtrate time.
Preferably, described reactor body total height 2.02m, zeolite filler layer thickness 0.5m, extra large sand filtration bed of material 0.9m.
Preferably, it is 1.05rad that the surrounding of described filler supporting plate and inwall contact position, filter tank have 4 radians, the laterally zygomorphic arcuate socket that waits width that width is 4mm; 4 described arcuate sockets are uniformly distributed, and along the center of filler supporting plate, are symmetrically distributed.Most run by gravity denitrification filter pool become water levels to be controlled, and water inlet waterfall flows through into water weir notch, and this mode easy gas enclosure of process of intaking can increase the DO of water inlet, reduces denitrification effect, increases the dosage of carbon source.Consider this undesirable element, not perforate in the middle of the filler supporting plate of the present invention's design, opening 4 radians with wall contact position, filter tank Yan Bi, be 1.05rad, width is the width symmetrical arc shape hole such as grade of 4mm, make current laminar-flow type along filter tank wall, enter buffer layer by arcuate socket, the pass design of this special shape, can avoid airborne oxygen to enter in water, reduces the carbon source consumption of subsequent disposal.
This device be used as less energy-consumption to waste water denitrification biological treatment, the step of its method is:
A) in equalizing tank, add pending waste water, open the first doser, by the first doser, in equalizing tank, add ammonium chloride solution, making ammonia nitrogen concentration is 1.6 ± 0.3mg/L;
B) intake pump starts, and current enter zeolite filler layer by even water distributor, the NH in zeolite adsorption water inlet
4 +-N, nitrobacteria utilizes the NH in water
4 +-N and dissolved oxygen carry out nitrification, by NH
4 +-N is converted into nitrate nitrogen, nitrous acid nitrogen;
C) current that flow out zeolite filler layer flow directly into the extra large sand filtration bed of material after the sidewall of the hole reactor body of filler supporting plate periphery enters buffer layer again, and meanwhile the second doser moves simultaneously, and additional carbon sodium acetate is squeezed in buffer layer.With additional carbon source and original BOD in waste water, as the organic carbon source of denitrifying bacterium in the extra large sand filtration bed of material, nitrite anions is become to nitrogen with reducing nitrate radical;
D) water after the extra large sand filtration bed of material is processed flows in tank after supporting layer;
When E) the water part in tank is used for opening backwashing pump, complete the back flushing to the extra large sand filtration bed of material, rest part qualified discharge.
What preferably, described step C), add is to be easy to biological degradation organism sodium acetate, and its amount is to make the nitrogen in carbon content/water inlet in additional sodium acetate equal 1.86.
Zeolite filler layer is contained at device of the present invention top, can reduce water inlet dissolved oxygen to denitrifying impact.Former current are through zeolite filler layer, the NH in the former water of zeolite adsorption
4 +-N, the nitrobacteria being attached on zeolite utilizes the NH in water
4 +-N and dissolved oxygen carry out nitrification.Even under low influent ammonium concentration (0.78mg/L), nitrification also can be reduced to 4.15mg/L from 6.70mg/L by water inlet dissolved oxygen.Because nitrification has reduced the dissolved oxygen in former water, the required carbon source of denitrification that the extra large sand filtration bed of material carries out greatly reduces, and is guaranteeing, under the prerequisite that water outlet total nitrogen concentration is constant, can to reduce additional carbon dosage, and additional carbon-nitrogen ratio can reduce to C/N=1.86 by C/N=3; Nitrification has reduced dissolved oxygen to denitrifying restraining effect, suitably improves hydraulic load, and water outlet total nitrogen concentration is substantially constant, and hydraulic load is brought up to 4m
3m
-2h
-1, also can guarantee that water outlet total nitrogen concentration is lower than 3mg/L; Because zeolite is to NH
4 +the strong adsorption effect of-N, even if Sewage Plant secondary effluent is unstable, in the situation that ammonia nitrogen loading improves, denitrification bio-filter nitrogen removal rate is still stable.It has saving floor space, the advantages such as running cost is low, stable water outlet.
3. beneficial effect
Compared with prior art, the present invention has following remarkable advantage:
(1) device of the present invention is provided with zeolite filler layer, can reduce water inlet dissolved oxygen to denitrifying impact, and the required carbon source of denitrification that the extra large sand filtration bed of material carries out greatly reduces, and is guaranteeing, under the prerequisite that water outlet total nitrogen concentration is constant, can to reduce additional carbon dosage; Thereby minimizing running cost;
(2) not perforate in the middle of the filler supporting plate designing in device of the present invention, the width symmetrical arc shape hole such as opening with wall contact position, filter tank Yan Bi, make current laminar-flow type along filter tank wall, enter buffer layer by arcuate socket, in the process that current decline, do not produce small current whirlpool, effectively avoid airborne oxygen to enter in water;
(3) the present invention is due to the existence of zeolite filler layer nitrification, and the ammonia nitrogen limited for existing denitrification bio-filter clearance also has good removal effect;
(4) the present invention is because zeolite is to NH
4 +the strong adsorption effect of-N, even if Sewage Plant secondary effluent is unstable, ammonia nitrogen loading improves in the situation of 5mg/L, water outlet ammonia nitrogen concentration is still still less, thereby has guaranteed the stability of denitrification bio-filter water outlet;
(5) the present invention makes full use of original objectionable impurities (ammonia nitrogen) in waste water and by biochemical mode, guarantees water outlet total nitrogen concentration, economic environmental protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the structural representation of apparatus of the present invention filler supporting plate;
Fig. 3 is the A-A sectional view in apparatus of the present invention Fig. 2.
In figure: 1, equalizing tank; 2, the first doser; 3, the second doser; 4, even water distributor; 5, zeolite filler layer; 6, back flushing water outlet; 7, buffer layer; 8, the extra large sand filtration bed of material; 9, supporting layer; 10, backwashing pump; 11, intake pump; 12, filler supporting plate, 13, reactor body; 14, tank; 15, blower fan.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
Embodiment 1
As shown in Figure 1, a kind of denitrification bio-filter device of less energy-consumption, comprise equalizing tank 1, reactor body 13 and tank 14, also comprise the first doser 2, the second doser 3, backwashing pump 10, intake pump 11 and blower fan 15, the first doser 2 is provided with a chemical feed pipe, and chemical feed pipe stretches in equalizing tank 1; Equalizing tank 1 comprises raw water inlet and water outlet, and the water outlet of equalizing tank 1 is connected with the top of intake pump 11, reactor body 13 successively by pipeline; Reactor body 13 is columnar structure, and inside comprises even water distributor 4, zeolite filler layer 5, buffer layer 7, the extra large sand filtration bed of material 8 and supporting layer 9 from top to bottom successively; Between zeolite filler layer 5 and buffer layer 7, be also provided with filler supporting plate 12; On the sidewall of buffer layer 7, also have back flushing water outlet 6; The bottom of reactor body 13 is provided with processes water water outlet and backwashing water water-in, processes water water outlet and by pipeline, is connected with tank 14 respectively with backwashing water water-in; Backwashing pump 10 is on the pipeline between backwashing water water-in and tank 14; The second doser 3 is connected on the sidewall of buffer layer 7 by pipeline; Zeolite filler layer 5 is comprised of zeolite, selects particle diameter 4-8mm, density 1.9-2.6g/cm
3, porosity>=48% and specific surface area 570-670m
2the zeolite of/g.Even water distributor 4 is comprised of supervisor-arm-water distributing pore, and the downside of every arm is evenly arranged the isodiametric apertures of pitch-row such as 15.Supporting layer 9 is comprised of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.The sea sand filtration bed of material 8 is comprised of extra large sand, the particle diameter 2-3mm of extra large sand.Not perforate in the middle of the filler supporting plate of the present invention's design, it is 1.05rad that the surrounding of filler supporting plate 12 and 13 inwall contact positions, filter tank have 4 radians, the laterally zygomorphic arcuate socket that waits width that width is 4mm; The mid-way of arcuate socket (the nearest distance of 13 inwalls from filter tank) is 0.5mm apart from the distance of filter tank 13 inwalls, and 4 arcuate sockets are symmetrically distributed along filler supporting plate 12 center.The design of this shape makes current laminar-flow type along filter tank wall, enter buffer layer by arcuate socket when can make waste water flow downward, and can as conventional discharge orifice, not produce eddy current, avoids airborne oxygen to enter in water; Denitrification bio-filter is by the constant water inlet of intake pump, and constant water level operation can reduce waterfall stream, also can reduce the formation of DO.
A waste water denitrification bioremediation for less energy-consumption, the steps include:
A) in equalizing tank 1, add pending waste water, open the first doser 2, by the first doser 2, in equalizing tank 1, add ammonium chloride solution, making ammonia nitrogen concentration is 1.6 ± 0.3mg/L; After 22 days, on zeolite filler layer 5, ammonia nitrogen removal frank reaches 76%, and stable; After stable, close the first doser 2; When influent ammonium concentration is 0.78mg/L, zeolite filler layer 5 of the present invention can drop to 4.15mg/L from 6.70mg/L by water inlet dissolved oxygen;
B) intake pump 11 starts, and current enter zeolite filler layer 5 by even water distributor 4, the NH in zeolite adsorption water inlet
4 +-N, nitrobacteria utilizes the NH in water
4 +-N and dissolved oxygen carry out nitrification, by NH
4 +-N is converted into nitrate nitrogen, nitrous acid nitrogen;
C) current that flow out zeolite filler layer 5 flow directly into the extra large sand filtration bed of material 8 after the sidewall of the hole reactor body 13 of filler supporting plate 12 peripheries enters buffer layer 7 again, meanwhile the second doser 3 moves simultaneously, and additional carbon sodium acetate is squeezed in buffer layer 7.With additional carbon source and original BOD in waste water, as the organic carbon source of denitrifying bacterium in the extra large sand filtration bed of material 8, nitrite anions is become to nitrogen with reducing nitrate radical; After 12 days, the interior nitrate nitrogen clearance of the extra large sand filtration bed of material 8 reaches 84% and stable;
D) water after the extra large sand filtration bed of material 8 is processed flows in tank 14 after supporting layer 9;
When E) the water part in tank 14 is used for opening backwashing pump 10, complete the back flushing to the extra large sand filtration bed of material 8, water/gas is back flushing time length 3min simultaneously; Backwashing water intensity is 8L/ (s ﹒ m
2), gas intensity is 14L/ (s ﹒ m
2); Rest part qualified discharge.
The present invention, because zeolite filler layer can effectively reduce water inlet dissolved oxygen to denitrifying restraining effect, is guaranteeing that under the prerequisite that water outlet total nitrogen concentration is constant, additional carbon-nitrogen ratio can reduce to C/N=1.86 by C/N=3.
The present embodiment adopts water conservancy load 2m
3/ (m
2h), additional carbon-nitrogen ratio is C/N=1.86, before and after the water quality of using this device to process, changes:
Hydraulic load is brought up to 4m
3/ (m
2h), water outlet total nitrogen is 2.62mg/L, still meet water outlet total nitrogen < 3mg/L's and strict requirement.
The present invention is because zeolite is to NH
4 +the strong adsorption effect of-N, even if Sewage Plant secondary effluent is unstable, ammonia nitrogen loading is brought up in the situation of 5mg/L, denitrification bio-filter water outlet total nitrogen is still stabilized in 3mg/L.
Above-described is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the denitrification bio-filter device of a less energy-consumption, comprise equalizing tank (1), reactor body (13) and tank (14), it is characterized in that, also comprise the first doser (2), the second doser (3), backwashing pump (10), intake pump (11) and blower fan (15), described the first doser (2) is provided with a chemical feed pipe, and chemical feed pipe stretches in equalizing tank (1); Described equalizing tank (1) comprises raw water inlet and water outlet, and the water outlet of equalizing tank (1) is connected with the top of intake pump (11), reactor body (13) successively by pipeline; Described reactor body (13) is columnar structure, and inside comprises even water distributor (4), zeolite filler layer (5), buffer layer (7), the extra large sand filtration bed of material (8) and supporting layer (9) from top to bottom successively; Between described zeolite filler layer (5) and buffer layer (7), be also provided with filler supporting plate (12); On the sidewall of described buffer layer (7), also have back flushing water outlet (6); The bottom of described reactor body (13) is provided with processes water water outlet and backwashing water water-in, processes water water outlet and by pipeline, is connected with tank (14) respectively with backwashing water water-in; Described backwashing pump (10) is positioned on the pipeline between backwashing water water-in and tank (14); Described the second doser (3) is connected on the sidewall of buffer layer (7) by pipeline; Described zeolite filler layer (5) is comprised of zeolite.
2. the denitrification bio-filter device of a kind of less energy-consumption according to claim 1, is characterized in that, described even water distributor (4) is comprised of supervisor-arm-water distributing pore, and the downside of every arm is evenly arranged the isodiametric apertures of pitch-row such as a plurality of.
3. the denitrification bio-filter device of a kind of less energy-consumption according to claim 1, is characterized in that, described supporting layer (9) is comprised of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.
4. the denitrification bio-filter device of a kind of less energy-consumption according to claim 1, is characterized in that, the described extra large sand filtration bed of material (8) is comprised of extra large sand, the particle diameter 2-3mm of extra large sand; Described zeolite filler layer (5) is selected particle diameter 4-8mm, density 1.9-2.6g/cm
3, porosity>=48% and specific surface area 570-670m
2the zeolite of/g.
5. the denitrification bio-filter device of a kind of less energy-consumption according to claim 1, it is characterized in that, it is 1.05rad that the surrounding of described filler supporting plate (12) and inwall contact position, filter tank (13) have 4 radians, the arcuate socket that waits width that width is 4mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496786A (en) * | 2013-10-22 | 2014-01-08 | 南京大学 | Low-energy-consumption denitrification biological filter and treatment method thereof |
| WO2021253409A1 (en) * | 2020-06-19 | 2021-12-23 | 中清信益环境(南京)有限公司 | Efficient denitrification filtering pool system and operating method |
-
2013
- 2013-10-22 CN CN201320651184.9U patent/CN203498162U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496786A (en) * | 2013-10-22 | 2014-01-08 | 南京大学 | Low-energy-consumption denitrification biological filter and treatment method thereof |
| CN103496786B (en) * | 2013-10-22 | 2015-06-17 | 南京大学 | Low-energy-consumption denitrification biological filter and treatment method thereof |
| WO2021253409A1 (en) * | 2020-06-19 | 2021-12-23 | 中清信益环境(南京)有限公司 | Efficient denitrification filtering pool system and operating method |
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