CN109368934A - A kind of waste water autotrophic denitrification nitrogen rejection facility and wastewater treatment method - Google Patents
A kind of waste water autotrophic denitrification nitrogen rejection facility and wastewater treatment method Download PDFInfo
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- CN109368934A CN109368934A CN201811438882.4A CN201811438882A CN109368934A CN 109368934 A CN109368934 A CN 109368934A CN 201811438882 A CN201811438882 A CN 201811438882A CN 109368934 A CN109368934 A CN 109368934A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 47
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 21
- 238000004065 wastewater treatment Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 146
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000005864 Sulphur Substances 0.000 claims abstract description 79
- 238000005266 casting Methods 0.000 claims abstract description 70
- 238000004062 sedimentation Methods 0.000 claims abstract description 49
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- 239000006228 supernatant Substances 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 37
- 238000010992 reflux Methods 0.000 claims description 25
- 230000002572 peristaltic effect Effects 0.000 claims description 18
- 238000009360 aquaculture Methods 0.000 claims description 15
- 239000010802 sludge Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 230000008719 thickening Effects 0.000 claims description 8
- 244000144974 aquaculture Species 0.000 claims description 7
- 230000010339 dilation Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000001376 precipitating effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 17
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 11
- 229910002651 NO3 Inorganic materials 0.000 abstract description 10
- 238000009395 breeding Methods 0.000 abstract description 10
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- 239000000463 material Substances 0.000 abstract description 7
- 238000005243 fluidization Methods 0.000 abstract description 5
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- 239000002574 poison Substances 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
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- 238000012546 transfer Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
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- 239000000047 product Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 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 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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- 238000012851 eutrophication Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- -1 has physical method Chemical compound 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 208000005135 methemoglobinemia Diseases 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229940005654 nitrite ion Drugs 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of waste water autotrophic denitrification nitrogen rejection facility and wastewater treatment methods, belong to field of waste water treatment.It includes preposition sedimentation filtration system, inner circulation fluidized sulphur casting bed and Radial Flow settler, the present invention combines preposition processing, advanced treating and postpositive disposal, purification of waste water efficiency is substantially increased, the risk that device blocks in waste water autotrophic denitrification denitrification process is reduced；Fluidisation sulphur casting bed, which is equipped with interior circulating backwater device and combines with outer circulation return water, can give full play to the effect of sulphur autotrophic denitrification, increase waste water and drusen time of contact, improve nitrate removal rate, and be conducive to increase inflow, wash away biomembrane, improve the corruption situation of water inlet, reduce concentration of poison, biomembrane is made to keep activity；Selected materials of the present invention are low in cost, significant effect, are especially suitable for nitrogenous breeding wastewater water process, have biggish market prospects and application value.
Description
Technical field
The invention belongs to sewage treatment fields, more specifically to a kind of waste water autotrophic denitrification nitrogen rejection facility and side
Method.
Background technique
In recent years, aquaculture mode is from the extensive cultivation of the past, half intensive culture to intensive culture transition, but due to the economy that covets
Benefit, cultivation density is excessive, and breed variety is single, and the balance of natural ecosystems is broken in breeding water body, and self-pollution is tight
Weight.In addition, with the increase of culturing time, in breeding water body will the organic pollution materials such as the nitrogen containing higher concentration, phosphorus, such as
These water bodys of fruit are not just continuously discharged into environment by corresponding purified treatment, can cause water eutrophication, seriously
Environment water water quality is influenced, certain secondary pollution is caused to environment.Also, as population increases the fast development with economy,
It also increases substantially to the demand of water resource, as important resource of water supply, lake and reservoir account for about the 25% of water supply, such as
The such water body nitrate content of fruit is exceeded, and long-term drinking will lead to methemoglobinemia, also has carcinogenic risk, can seriously endanger
Evil human health.Therefore, the removal of nitrate is a urgent problem to be solved in breeding water body.
Currently, nitrate nitrogen mainly has physical method, chemical method and bioanalysis in removal cultivation water.Physico-chemical process master
It to include hyperfiltration, ion-exchange and absorption method, physical removal technology is although high-efficient, and it is easy to operate, but only by water
In nitrate ion (NO3 -) be transferred in medium or be concentrated in waste liquid, it does not completely remove, meanwhile, the regeneration of generation
The concentration of waste liquid and concentrate is higher, can generate secondary pollution problems, need to be further processed, increase processing cost, from
From the point of view of angle of sustainable development, physical removal technology is not long-range developing direction.Chemical removal techniques mainly include active
Metal deoxidization, catalytic reduction method and electrochemical process etc., active metal reduction method and catalytic reduction method may be summarized to be and pass through
Reducing agent is added into polluted-water, nitrate ion (NO3 -) it is reduced to nitrite ion (NO2 -), finally it is reduced to nitrogen
Gas (N2) or ammonium ion (NH4 +), the ammonium ion (NH in product4 +) it can be converted to nitrite ion under certain condition
(NO2 -) toxic action of human health and aquatile can not be ignored；Electrochemical process is in the presence of energy consumption is high, by-product is more, electricity
The problems such as being easily passivated, is not appropriate for being widely applied on a large scale, therefore, chemical denitrogenation technology answering in water body denitrification processing
Use limited promise；Bioanalysis is a kind of to convert the harmless or lesser substance of harm by the degradation of microorganism for pollutant
The technology curbed environmental pollution, biological denitrification technology has been widely used in the processing of various water bodys at present.It is biological anti-
Nitrification technology can convert harmless N for Water element under anaerobism or anoxia condition2, realize the thorough of water body denitrification
Harmless treatment has the characteristics that efficient low-consume, favors by numerous scholars.The form of carbon source is utilized not according to denitrifying bacterium
Together, biological denitrification can be divided into two major classes, respectively autotrophic denitrification and heterotrophic denitrification.
Organic carbon source is the principal element for influencing heterotrophic denitrification efficiency during biological heterotrophic denitrification, therefore, it is necessary to
Additional a large amount of organic carbon sources are methanol as electron donor, the most common additional carbon；Also, heterotrophic denitrification process sludge produces
Amount is high, this will certainly increase cost of sewage disposal, be easy to cause secondary pollution or influences denitrification efficiency.For example, Zhang Haohao etc.
People's (influence [J] that types carbon sources run different filtrate denitrification filter pools, Environmental science and technology, 2017,40:224-229)
Biological denitrification effect when having studied respectively using methanol and sodium acetate as carbon source, although pollutant goes out to remove excellent effect,
Methanol has toxicity, can generate certain influence on the growth of denitrifying microorganism to a certain extent, also, its additive amount is difficult to
Control often not exclusively causes secondary pollution because reacting.
Autotrophic denitrification is with hydrogen or reducible sulfur compound (H2S、S、S2O3 2-Deng) etc. reducing inorganics substance be used as from
Support the electron donor of denitrifying bacterium, nitrate ion (NO3 -) it is used as electron acceptor, CO2、HCO3 -、CO3 2-Deng be used as inorganic carbon source,
Nitrate ion (NO3 -) it is reduced to N2.The microbial production of autotrophic denitrification process is low, sludge quantity is few, and does not need additionally to add
Add organic carbon source, while organic carbon source secondary pollution will not be led to the problem of, therefore have a good application prospect to sewage water denitrification.
Sulphur autotrophy reaction unit mainly forms biomembrane in reproducibility sulfide surface, with the mode operation of fixed bed filtering, is easy
It is uneven to generate water inlet, water quality is unstable, and the utilization rate and mass transfer rate of sulfide are low, causes at unit volume reactor
The problems such as reason ability is lower, and denitrogenation processing is not thorough.Therefore, research and development economy, efficient sulphur autotrophic denitrification are core
Denitrification method and equipment have great importance and are worth to solution breeding water body nitrate treatment technical problem.
Summary of the invention
1. to solve the problems, such as
Additional carbon is needed for existing heterotrophic denitrification technology, sludge yield is high in denitrification process；Autotrophic denitrification
It is also easy to produce that influent quality is unstable, and speed is uneven in the process, the utilization rate and mass transfer rate of reducible sulfur compound are low, lead
The problems such as cause unit volume reactor for treatment ability is lower, and denitrogenation processing is not thorough.The present invention provides a kind of anti-nitre of waste water autotrophy
Change nitrogen rejection facility and method, be based on inner circulation fluidized sulphur casting bed, have both internal-external double circulation system, can be realized the efficient de- of water body
Nitrogen has the function that purifying water body.
2. technical solution
To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:
A kind of waste water autotrophic denitrification nitrogen rejection facility, including cesspool, preposition sedimentation filtration system, inner circulation fluidized sulphur sand
Bed and Radial Flow settler, the inner circulation fluidized sulphur casting bed bottom water inlet end pass through pipeline and preposition sedimentation filtration system
Connection, the inner circulation fluidized sulphur casting bed top water outlet are connect by pipeline with Radial Flow settler, and institute's Radial Flow is heavy
Drop device is connect by pipeline with preposition sedimentation filtration system；
The preposition sedimentation filtration system includes Microfilter, peristaltic pump, sedimentation concentration pond and supernatant liquid pool, the Microfilter
Water inlet end is connect with cesspool and Radial Flow settler respectively by pipeline, and Microfilter water outlet is dense by pipeline and sedimentation
The connection of contracting pond, sedimentation concentration pond upper end water outlet are connect with supernatant liquid pool, the supernatant liquid pool and inner circulation fluidized sulphur sand
The connecting pipe in bed bottom water inlet end connection, the Microfilter and sedimentation concentration pond is equipped with peristaltic pump, sets on the Microfilter
There is total water outlet；
The inner circulation fluidized sulphur casting bed includes cylinder, siphon pipe and overflow weir, and the cylinder is equipped with upper and lower two sights
Window is examined, interior to be filled with drusen, cylinder body bottom is equipped with reflected bottom plate and annular intake antrum, and annular intake antrum is located at reflection bottom
It is connect above plate with supernatant liquid pool, overflow weir is located at the top of cylinder, and the water outlet of overflow weir passes through outlet conduit and Radial Flow
Settler connection, the siphon pipe are connect with overflow weir and cylinder.
Preferably, the rotary drum of the Microfilter is equipped with the microscreen that pore diameter range is 0.5~1.2mm.
Preferably, the bottom in the sedimentation concentration pond is in coniform.
Preferably, the width range of the water inlet slit of the annular intake antrum is 5~10mm.
Preferably, the drusen particle size range of the inner barrel filling is 0.30~1.31mm, when filler is in fluidised form
Dilation is 35%~40%.
Preferably, shear pump is installed in the connecting pipe of the water outlet of the overflow weir and Radial Flow settler.
A kind of waste water autotrophic denitrification denitrogenation method, it is characterised in that: the following steps are included:
A. a kind of above-mentioned waste water autotrophic denitrification nitrogen rejection facility is built, the waste sludge that aquaculture is generated is sent into micro-filtration
Machine is separated, and by peristaltic pump pumps to sedimentation concentration pond, so that solid ion thickening is deposited in sedimentation concentration pond triangle
The bottom of cone；
B. under the driving effect of peristaltic pump, supernatant in sedimentation concentration pond by pipeline into supernatant liquid pool,
Supernatant in supernatant liquid pool generates upward water via the annular intake antrum and reflected bottom plate of inner circulation fluidized sulphur casting bed bottom
Stream drives drusen rotation to float, expands sulphur casting bed, made by shear pump into inner circulation fluidized sulphur casting bed cylinder
The height of bed of inner circulation fluidized sulphur casting bed is in 3.9m or so, and then, under the action of shear pump, water body spiral is simultaneously uniformly overflowed
To overflow weir, meanwhile, siphon pipe plays siphonage, and water body is made to return to cylinder, starts interior reflux cycle purification, and purification is completed
Afterwards, it is discharged into the water body of overflow weir by pipeline, flows through shear pump and enter Radial Flow settling vessel；
C. after precipitating, the water body in Radial Flow settling vessel returns to Microfilter by pipeline, and circulating reflux is extremely
Inner circulation fluidized sulphur casting bed carries out exteenal reflux circulating purification, and after carrying out 2~3 exteenal refluxs circulation, purification is completed, and water body passes through
Total water outlet discharge system on Microfilter；
D. 5~June of experiment operation, the water of measurement supernatant liquid pool and inner circulation fluidized sulphur casting bed water outlet before being discharged every time
Matter index.
Preferably, service condition in the step B are as follows: enter inner circulation fluidized sulphur casting bed hydraulic loading be 860~
888L/(m2Min), average flow rate is 63~65L/min, NO3 -- N concentration is 2~7mg/L, and hydraulic detention time is 3~5min.
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) waste water autotrophic denitrification nitrogen rejection facility provided by the present invention and method, by it is preposition processing, advanced treating and after
Processing is set to combine, it is useless to the solid in aquiculture waste water under the dual preposition processing effect in Microfilter and sedimentation concentration pond
Gurry is separated, and is increased the removal of solid granule and suspended matter in sewage, is greatly reduced waste water autotrophic denitrification denitrogenation
The risk that device blocks in the process；Filled with fluidisation state little particle sulphur in sulphur casting bed, on the one hand there is large specific surface area,
Conducive to microorganism colonization and growth, autotrophic denitrification effect can be given full play to, on the other hand can anti-locking apparatus blocking and
It is transferred to sulphur surface using nitrate, improves mass-transfer efficiency, increases nitrate removal rate；It is captured using Radial Flow settling vessel deep
Drusen that may be present after degree processing in water body, has the function that comprehensive decontamination water body；
(2) waste water autotrophic denitrification nitrogen rejection facility provided by the present invention and method, inner-outer circulation is combined, and is realized double
To water inlet, water of the Radial Flow settling vessel after processed is subjected to outer loop reflux, inside is formed using siphon pipe and is recycled back to
Stream, on the one hand, can increase with drusen time of contact, secondary denitrogenation processing is carried out, to improve the filter rate of biofilter；
On the other hand it can increase inflow, wash away biomembrane, improve the corruption situation of water inlet, reduce concentration of poison, keep biomembrane frequent
Keep activity；
(3) waste water autotrophic denitrification nitrogen rejection facility provided by the present invention and method, water inlet end be equipped with reflected bottom plate and
The width range of annular intake antrum, the water inlet slit of annular intake antrum is 5~10mm, and waste water can generate after entering annular intake antrum
Strong rotary water current, and the upward water flow rotated strongly is generated under the synergistic effect of reflected bottom plate, to drive sulphur
Grain rotation is floated, and casting bed is expanded, and forms fluidized bed body, increases the contact surface between sewage and drusen to greatest extent
Product, promotes the progress of denitrification process, so that nitrogenous effluent is more fully handled；
(4) selected materials of the present invention are low in cost, significant effect, are especially suitable for nitrogenous breeding wastewater water process, have compared with
Big market prospects and application value.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
In figure: 1, cesspool；2, Microfilter；3, total water outlet；4, peristaltic pump；5, sedimentation concentration pond；6, supernatant liquid pool；7,
Reflected bottom plate；8, annular intake antrum；9, observation window；10, cylinder；11, siphon pipe；12, water outlet；13, overflow weir；14, it shears
Pump；15, Radial Flow settler.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Embodiment 1
As shown in Figure 1, the device mainly includes preposition sedimentation filtration system, inner circulation fluidized sulphur casting bed and Radial Flows
Settler 14, it is that (aperture in the present embodiment is 0.5~0.8mm that preposition sedimentation filtration system, which includes equipped with pore diameter range,
0.5mm) Microfilter 2 of microscreen, peristaltic pump 4, bottom are in coniform sedimentation concentration pond 5 and supernatant liquid pool 6, Microfilter 2
Water inlet end is connect with cesspool 1 and Radial Flow settler 15 respectively by pipeline, and 2 water outlet of Microfilter is by pipeline and sinks
It drops concentration basin 5 to connect, 5 upper end water outlet of sedimentation concentration pond is connect with supernatant liquid pool 6, supernatant liquid pool 6 and inner circulation fluidized sulphur sand
The connecting pipe in bed bottom water inlet end connection, the Microfilter 2 and sedimentation concentration pond 5 is equipped with peristaltic pump 4, goes back on Microfilter 2
Equipped with total water outlet 3；
Inner circulation fluidized sulphur casting bed includes cylinder 10, siphon pipe 11 and overflow weir 13, and the cylinder 10 is equipped with up and down
Two observation windows, it is interior filled with particle size range be 0.30~0.68mm drusen, 10 bottom of cylinder be equipped with reflected bottom plate 7 with
And the annular intake antrum 8 that the width range of water inlet slit is 5~7mm, be preferably provided with the width of 5mm in the present embodiment, annular into
Water cavity 8 is located at 7 top of reflected bottom plate and connect with supernatant liquid pool 6, and overflow weir 13, the water outlet of overflow weir 13 are equipped at the top of cylinder 10
It is connect by outlet conduit with Radial Flow settler 15, siphon pipe 11 is connect with overflow weir 13 and cylinder 10.
The manufacture material of inner circulation fluidized sulphur casting bed selects organic glass, and sulphur casting bed whole height range is 3.5~3.8m,
Height in the present embodiment is 3.5m, and diameter range is 0.28~0.30m, and the diameter in the present embodiment is 0.28m；The cylinder
The length range of body is 2.5~2.6m, and the length range of the present embodiment middle cylinder body 10 is 2.5m, and the range of cylinder internal diameter is 0.25
~0.27m, the cylinder internal diameter in the present embodiment are 0.25m, two observation windows setting in drum surface, at a distance of 1.5~
Within the scope of 1.7m, at a distance of 1.5m between two observation windows 9 in the present embodiment, size range selects 8cm × 40cm, material
Select acrylic acid.
Its basic functional principle are as follows: waste sludge is concentrated through Microfilter 2 in cesspool 1, and is sent to sedimentation concentration by peristaltic pump 4
Pond 5, so that solid ion thickening is deposited in the bottom of 5 pyrometric cone of sedimentation concentration pond, the supernatant overflowed through sedimentation concentration pond 5 converges
Enter supernatant liquid pool 6, the sewage in supernatant liquid pool 6 enters cylinder 10, via reflected bottom plate 7 and the effect shape of annular intake antrum 8
At the upward water flow rotated strongly, so that drusen rotation be driven to float, casting bed is expanded, forms fluidized bed body and carry out sulphur certainly
Denitrification denitrogenation processing is supported, filler is in fluidised form at this time, and dilation 35%, shear pump 14 is to control inner circulation fluidized sulphur casting bed
The height of bed, it is ensured that hydraulic detention time of the supernatant in cylinder 10, and give the spiralling driving force of water body, be uniformly spilled over to
Overflow weir 13；Meanwhile siphon pipe 11 plays siphonage, and water body is made to return to cylinder 10, starts interior reflux cycle purification, has purified
Cheng Hou, the water body into overflow weir 13 are discharged by pipeline, are flowed through shear pump 14 and are entered Radial Flow settling vessel 15；By precipitating
Afterwards, the water body in Radial Flow settling vessel 15 returns to Microfilter 2 by pipeline, and circulating reflux is to inner circulation fluidized sulphur sand
Bed carries out exteenal reflux circulating purification, and purification is completed, and water body passes through 3 discharge system of total water outlet on Microfilter 2.
Carrying out autotrophic denitrification denitrogenation to waste water using the device of the present embodiment, specific step is as follows:
A. above-mentioned waste water autotrophic denitrification nitrogen rejection facility is built, the waste sludge that aquaculture is generated is sent into Microfilter 2
It is separated, and is extracted by peristaltic pump 4 to sedimentation concentration pond, so that solid ion thickening is deposited in 5 triangle of sedimentation concentration pond
The bottom of cone；
B. under the driving effect of peristaltic pump 4, the supernatant in sedimentation concentration pond 5 passes through pipeline into supernatant liquid pool 6
In, the supernatant in supernatant liquid pool 6 is generated via the annular intake antrum 8 and reflected bottom plate 7 of inner circulation fluidized sulphur casting bed bottom
Upward water flow drives drusen rotation to float, expands sulphur casting bed, by cutting into inner circulation fluidized sulphur casting bed cylinder 10
Cutting pump 14 makes the height of bed of inner circulation fluidized sulphur casting bed in 3.9m or so, and ensure supernatant in cylinder 10 hydraulic retention 3~
5min, then, under the action of shear pump 14, water body spiral is simultaneously uniformly spilled over to overflow weir 13, meanwhile, siphon pipe 11 is sent out
Siphonage is waved, water body is made to return to cylinder 10, starts interior reflux cycle purification, after the completion of purification, into the water body of overflow weir 13
It is discharged by pipeline, flows through shear pump 14 and enter Radial Flow settling vessel 15；
C. after precipitating, the overflow of Radial Flow settling vessel 15 returns to Microfilter 2 by pipeline, and circulating reflux is extremely
Inner circulation fluidized sulphur casting bed carries out exteenal reflux circulating purification, and after carrying out 2 exteenal refluxs circulation, purification is completed, and water body passes through micro-filtration
3 discharge system of total water outlet on machine 2；
D. the water at preceding measurement supernatant liquid pool 6 and inner circulation fluidized sulphur casting bed water outlet 12 is discharged every time experiment operation May
Matter index.
Denitrogenation processing carried out using above-mentioned apparatus and method to certain breeding wastewater, continuous operation 5 months, the operation of step B
It is 860~888L/ (m that condition, which is into the hydraulic loading of inner circulation fluidized sulphur casting bed,2Min), average flow rate is 63~65L/
Min, NO in water inlet3 -- N concentration is 2~7mg/L.Supernatant liquid pool in embodiment 1 and inner circulation fluidized sulphur casting bed are gone out three-times-weekly
Water quality is monitored at the mouth of a river, and the results are shown in Table 1, through the present embodiment treated water outlet water body in, NO3 -- N and other pollutions
The concentration of object has apparent reduction.
The main water quality indicator test case of aquiculture waste water in 1 embodiment 1 of table
Embodiment 2
The present embodiment on the basis of embodiment 1 advanced optimizes device, sets on the rotary drum of the Microfilter 2
Having pore diameter range is the microscreen of 0.9~1.0mm (aperture in the present embodiment is 1.0mm), useless for separating aquaculture
Solid waste in water.
Inner circulation fluidized sulphur casting bed inner barrel filling particle size range is 0.45~0.82mm drusen, the height of fixed bed
Degree is 1.0m, and the range that the width of the water inlet slit of annular intake antrum 8 is settable is 6~9mm, is preferably provided in the present embodiment
The width of 8mm, waste water generates strong rotary water current after entering annular intake antrum 8, and then enters cylinder 10 by slit of intaking,
The upward water flow rotated strongly is generated under the effect of reflected bottom plate 7, water flow drives drusen rotation to float, expands casting bed,
Dilation is 38%, is finally flowed out from top water outlet.
The manufacture material of sulphur casting bed selects organic glass, and sulphur casting bed whole height range is 3.6~3.9m, in the present embodiment
Height be 3.9m, diameter range is 0.29~0.32m, and the diameter in the present embodiment is 0.30m；The length of the cylinder 10
Range is 2.6~2.7m, and the length range of the present embodiment middle cylinder body 10 is 2.6m, and the range of cylinder internal diameter is 0.26~0.29m,
Cylinder internal diameter in the present embodiment is 0.26m, and two observation windows 9 setting is in drum surface, at a distance of 1.6~1.9m range
Within, at a distance of 1.8m between two observation windows 9 in the present embodiment, size range selects 9cm × 48cm.
Carrying out autotrophic denitrification denitrogenation to waste water using the device of the present embodiment, specific step is as follows:
A. above-mentioned waste water autotrophic denitrification nitrogen rejection facility is built, the waste sludge that aquaculture is generated is sent into Microfilter 2
It is separated, and is extracted by peristaltic pump 4 to sedimentation concentration pond, so that solid ion thickening is deposited in 5 triangle of sedimentation concentration pond
The bottom of cone；
B. under the driving effect of peristaltic pump 4, the supernatant in sedimentation concentration pond 5 passes through pipeline into supernatant liquid pool 6
In, the supernatant in supernatant liquid pool 6 is generated via the annular intake antrum 8 and reflected bottom plate 7 of inner circulation fluidized sulphur casting bed bottom
Upward water flow drives drusen rotation to float, expands sulphur casting bed, by cutting into inner circulation fluidized sulphur casting bed cylinder 10
Cutting pump 14 makes the height of bed of inner circulation fluidized sulphur casting bed in 3.9m or so, and ensures supernatant hydraulic retention 3.3 in cylinder 10
~4.2min, then, under the action of shear pump 14, water body spiral is simultaneously uniformly spilled over to overflow weir 13, meanwhile, siphon pipe
11 play siphonage, and water body is made to return to cylinder 10, start interior reflux cycle purification, after the completion of purification, into overflow weir 13
Water body is discharged by pipeline, is flowed through shear pump 14 and is entered Radial Flow settling vessel 15；
C. after precipitating, the overflow of Radial Flow settling vessel 15 returns to Microfilter 2 by pipeline, and circulating reflux is extremely
Inner circulation fluidized sulphur casting bed carries out exteenal reflux circulating purification, and after carrying out 3 exteenal refluxs circulation, purification is completed, and water body passes through micro-filtration
3 discharge system of total water outlet on machine 2；
D. the water at preceding measurement supernatant liquid pool 6 and inner circulation fluidized sulphur casting bed water outlet 12 is discharged every time experiment operation June
Matter index.
Denitrogenation processing carried out using above-mentioned apparatus and method to certain aquiculture waste water, continuous operation 6 months, the B's
In service condition, the hydraulic loading into inner circulation fluidized sulphur casting bed is 865~873L/ (m2Min), average flow rate be 64~
65L/min, NO in water inlet3 -- N concentration is 3~6mg/L.Twice a week to supernatant liquid pool in embodiment 2 and inner circulation fluidized sulphur sand
Bed water outlet water quality be monitored, the results are shown in Table 2, through the present embodiment treated water outlet water body in, NO3 -- N and other
The concentration of pollutant has apparent reduction.
The main water quality indicator test case of aquiculture waste water in 2 embodiment 2 of table
Embodiment 3
The present embodiment has carried out further optimization on the basis of embodiment 1, and the rotary drum of the Microfilter is equipped with hole
Diameter range is the microscreen of 1.1~1.2mm (aperture in the present embodiment is 1.2mm), for separating in aquiculture waste water
Solid waste.
The width range of the water inlet slit of the inner circulation fluidized sulphur casting bed annular intake antrum is 8~10mm, this implementation
The width of 10mm is preferably provided in example, waste water generates strong rotary water current after entering annular intake antrum, and then narrow by intaking
Seam enters cylinder, and the upward water flow rotated strongly is generated under reflected bottom plate effect, and water flow drives gravel rotation to float, makes casting bed
Expansion is finally flowed out from top water outlet.
The manufacture material of the inner circulation fluidized sulphur casting bed selects organic glass, and sulphur casting bed whole height range is 3.8~
4.0m, the height in the present embodiment are 4.0m, and diameter range is 0.30~0.35m, and the diameter in the present embodiment is 0.35m；Institute
The length range for the cylinder 10 stated is 2.7~2.8m, and the length range of the present embodiment middle cylinder body 10 is 2.8m, the model of cylinder internal diameter
It encloses for 0.28~0.30m, the cylinder internal diameter in the present embodiment is 0.30m, and two observation windows are arranged in drum surface, phase
Within the scope of 2.0~2.2m, at a distance of 2.2m between two observation windows 9 in the present embodiment, size range select 10cm ×
51cm。
The inner barrel filling particle size range of the inner circulation fluidized sulphur casting bed is 0.62~1.31mm drusen, filler
It is 40% in dilation when fluidised form.
Carrying out autotrophic denitrification denitrogenation to waste water using the device of the present embodiment, specific step is as follows:
A. above-mentioned waste water autotrophic denitrification nitrogen rejection facility is built, the waste sludge that aquaculture is generated is sent into Microfilter 2
It is separated, and is extracted by peristaltic pump 4 to sedimentation concentration pond, so that solid ion thickening is deposited in 5 triangle of sedimentation concentration pond
The bottom of cone；
B. under the driving effect of peristaltic pump 4, the supernatant in sedimentation concentration pond 5 passes through pipeline into supernatant liquid pool 6
In, the supernatant in supernatant liquid pool 6 is generated via the annular intake antrum 8 and reflected bottom plate 7 of inner circulation fluidized sulphur casting bed bottom
Upward water flow drives drusen rotation to float, expands sulphur casting bed, by cutting into inner circulation fluidized sulphur casting bed cylinder 10
Cutting pump 14 makes the height of bed of inner circulation fluidized sulphur casting bed in 3.9m or so, and ensures supernatant hydraulic retention 4.5 in cylinder 10
~5min, then, under the action of shear pump 14, water body spiral is simultaneously uniformly spilled over to overflow weir 13, meanwhile, siphon pipe 11
Siphonage is played, water body is made to return to cylinder 10, starts interior reflux cycle purification, after the completion of purification, into the water of overflow weir 13
Body is discharged by pipeline, is flowed through shear pump 14 and is entered Radial Flow settling vessel 15；
C. after precipitating, the overflow of Radial Flow settling vessel 15 returns to Microfilter 2 by pipeline, and circulating reflux is extremely
Inner circulation fluidized sulphur casting bed carries out exteenal reflux circulating purification, and after carrying out 2 exteenal refluxs circulation, purification is completed, and water body passes through micro-filtration
3 discharge system of total water outlet on machine 2；
D. the water at preceding measurement supernatant liquid pool 6 and inner circulation fluidized sulphur casting bed water outlet 12 is discharged every time experiment operation June
Matter index.
Denitrogenation processing carried out using above-mentioned apparatus and method to certain breeding wastewater, continuous operation 6 months, the step B's
In service condition, the hydraulic loading into inner circulation fluidized sulphur casting bed is 868~888L/ (m2Min), average flow rate be 64~
65L/min, NO in water inlet3 -- N concentration is 5~7mg/L.Supernatant liquid pool in embodiment 3 and inner circulation fluidized sulphur casting bed are gone out weekly
Water quality is monitored at the mouth of a river, and the results are shown in Table 3, through the present embodiment treated water outlet water body in, NO3 -- N and other pollutions
The concentration of object has apparent reduction.
The main water quality indicator test case of aquiculture waste water in 3 embodiment 3 of table
Comparative example 1
Compared with Example 3 compared with this comparative example 1 the difference is that only, the inner circulation fluidized sulphur casting bed only includes
Cylinder 10 and overflow weir 13, no 11 structure of siphon pipe；The drusen partial size filled inside cylinder 10 is 0.88mm.Other and reality
It is identical to apply example 3.
Denitrogenation processing carried out using above-mentioned apparatus and method to certain breeding wastewater, continuous operation 5 months.Three-times-weekly to right
Supernatant liquid pool 6 and fluidisation sulphur casting bed water outlet water quality are monitored in ratio 1, and the results are shown in Table 4.
The main water quality indicator test case of aquiculture waste water in 4 comparative example 1 of table
Comparative example 2
Compared with Example 3 compared with this comparative example 2 the difference is that only, this comparative example device is without Microfilter 2 and nothing
Radial Flow settling vessel 15.The inner circulation fluidized sulphur casting bed only includes cylinder 10 and overflow weir 13, no 11 structure of siphon pipe；Cylinder
The drusen partial size filled inside body 10 is 0.88mm.Other are same as Example 3
The working principle of 2 device of this comparative example are as follows: waste sludge is behind sedimentation concentration pond 5 in cesspool 1, so that solid ion
Thickening is deposited in the bottom of 5 pyrometric cone of sedimentation concentration pond, and the supernatant overflowed through sedimentation concentration pond 5 imports supernatant liquid pool, supernatant
Sewage in liquid pool 6 enters cylinder 10, rotates strongly via the effect formation of reflected bottom plate 7 and annular intake antrum 8 upward
Water flow expands casting bed so that drusen rotation be driven to float, and forms fluidized bed body and carries out at the denitrogenation of sulphur autotrophic denitrification
Reason, filler is in fluidised form, dilation 35%, the height of bed of the shear pump 14 to control fluidisation sulphur casting bed, it is ensured that supernatant exists at this time
The intracorporal hydraulic detention time of cylinder, and the spiralling driving force of water body is given, it is uniformly spilled over to overflow weir 13, is returned by piping
Sedimentation concentration pond 5 is returned to, and circulating reflux, to inner circulation fluidized sulphur casting bed, purification is completed, water body passes through total water outlet 3 discharge system
System.
Denitrogenation processing carried out using above-mentioned apparatus and method to certain breeding wastewater, continuous operation 5 months.Three-times-weekly to right
Supernatant liquid pool 6 and fluidisation sulphur casting bed water outlet water quality are monitored in ratio 2, and the results are shown in Table 5.
The main water quality indicator test case of aquiculture waste water in 5 comparative example 2 of table
Claims (8)
1. a kind of waste water autotrophic denitrification nitrogen rejection facility, including cesspool (1), it is characterised in that: further include preposition sedimentation filtration
System, inner circulation fluidized sulphur casting bed and Radial Flow settler (15), the inner circulation fluidized sulphur casting bed bottom water inlet end are logical
Piping is connect with preposition sedimentation filtration system, and water outlet passes through pipeline and Radial Flow at the top of the inner circulation fluidized sulphur casting bed
Settler (15) connection, the Radial Flow settler (15) connect to be formed by pipeline with preposition sedimentation filtration system to be recycled back to
Road；
The preposition sedimentation filtration system includes sequentially connected Microfilter (2), peristaltic pump (4), sedimentation concentration pond (5) and supernatant
Liquid pool (6), Microfilter (2) water inlet end are connect with cesspool (1) and Radial Flow settler (15) respectively by pipeline,
The supernatant liquid pool (6) connect with inner circulation fluidized sulphur casting bed bottom water inlet end；
The inner circulation fluidized sulphur casting bed includes cylinder (10), siphon pipe (11) and overflow weir (13)；In the cylinder (10)
Filled with drusen, bottom is equipped with reflected bottom plate (7) and annular intake antrum (8), annular intake antrum (8) are located at reflected bottom plate
(7) it is connect above and with supernatant liquid pool (6), the overflow weir (13) is located at the top of cylinder (10), the water outlet of overflow weir (13)
It is connect by outlet conduit with Radial Flow settler (15), the siphon pipe (11) and overflow weir (13) and cylinder (10) are even
It connects.
2. a kind of waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: the Microfilter (2)
Rotary drum be equipped with pore diameter range be 0.5~1.2mm microscreen, the connecting pipe of Microfilter (2) and sedimentation concentration pond (5)
It is equipped with peristaltic pump (4), Microfilter (2) is equipped with total water outlet (3).
3. a kind of waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: the sedimentation concentration pond
(5) in coniform, sedimentation concentration pond (5) inlet and outlet are arranged at the upper end of sedimentation concentration pond (5) for bottom.
4. a kind of waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: the annular intake antrum
(8) width range of water inlet slit is 5~10mm.
5. a kind of waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: in the cylinder (10)
The drusen particle size range of portion's filling is 0.30~1.31mm, and dilation is 35%~40% when filler is in fluidised form.
6. a kind of waste water autotrophic denitrification nitrogen rejection facility according to claim 3, it is characterised in that: the overflow weir (13)
Water outlet and Radial Flow settler (15) connecting pipe on shear pump (14) are installed.
7. a kind of waste water autotrophic denitrification denitrogenation method, it is characterised in that: the following steps are included:
A. the waste water autotrophic denitrification nitrogen rejection facility as described in claim 1~6 any one, the work in peristaltic pump (4) are built
Under, the waste sludge that the aquaculture in cesspool (1) generates is by Microfilter (2), into sedimentation concentration pond (5), consolidate
The thickening sedimentation of body ion；
B. solid ion thickening sedimentation after the completion of, the supernatant in sedimentation concentration pond (5) under the driving effect of peristaltic pump (4),
By pipeline into supernatant liquid pool (6), supernatant in supernatant liquid pool (6) via inner circulation fluidized sulphur casting bed bottom ring
Shape intake antrum (8) and reflected bottom plate (7) carry out sulphur autotrophic denitrification into the cylinder (10) of inner circulation fluidized sulphur casting bed, lead to
It crosses shear pump (14) and controls the height of bed of inner circulation fluidized sulphur casting bed in 3.9m, then, under the action of shear pump (14), water body spiral shell
It screws on and rises and be uniformly spilled over to overflow weir (13), meanwhile, siphon pipe (11) plays siphonage, and so that water body is returned to cylinder (10),
Reflux cycle purification in starting, after the completion of purification, the water body for entering back into overflow weir (13) is discharged by pipeline, flows through shear pump
(14) enter Radial Flow settling vessel (15) to precipitate；
C. after precipitating, the water body in Radial Flow settling vessel (15) returns to Microfilter (2) by pipeline, and circulating reflux
To inner circulation fluidized sulphur casting bed, exteenal reflux circulating purification is carried out, after carrying out 2~3 exteenal refluxs circulation, purification is completed, and water body is logical
Cross total water outlet (3) discharge system on Microfilter (2).
8. a kind of waste water autotrophic denitrification denitrogenation method according to claim 7, it is characterised in that: transported in the step B
Row condition are as follows: the influent load of inner circulation fluidized sulphur casting bed is 860~888L/ (m2Min), average flow rate is 63~65L/min,
NO3 -- N concentration is 2~7mg/L, and hydraulic detention time is 3~5min.
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| CN116444845A (en) * | 2023-03-16 | 2023-07-18 | 珠海市城市排水有限公司 | Modified biodegradable straw and preparation method and application thereof |
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| WO2003093180A1 (en) * | 2002-05-02 | 2003-11-13 | Korea Institute Of Science And Technology | Biological denitrification apparatus and method using fluidized-bed reactor filled with elemental sulfur |
| WO2014178711A1 (en) * | 2013-05-03 | 2014-11-06 | Paques I.P. B.V. | A process for anaerobic wastewater treatment |
| CN108503026A (en) * | 2018-04-19 | 2018-09-07 | 中国矿业大学 | City secondary effluent sulfenyl matter recycles autotrophic denitrification method |
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|---|---|---|---|---|
| WO2003093180A1 (en) * | 2002-05-02 | 2003-11-13 | Korea Institute Of Science And Technology | Biological denitrification apparatus and method using fluidized-bed reactor filled with elemental sulfur |
| WO2014178711A1 (en) * | 2013-05-03 | 2014-11-06 | Paques I.P. B.V. | A process for anaerobic wastewater treatment |
| CN108503026A (en) * | 2018-04-19 | 2018-09-07 | 中国矿业大学 | City secondary effluent sulfenyl matter recycles autotrophic denitrification method |
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| 程果锋;张宇雷;吴凡;刘世晶;朱浩;王健;张业;: "涡旋式流化砂床生物滤器的设计与研究", 渔业现代化, no. 06, 20 December 2011 (2011-12-20), pages 6 - 10 * |
| 程果锋;张宇雷;吴凡;刘世晶;朱浩;王健;张业;: "涡旋式流化砂床生物滤器的设计与研究", 渔业现代化, no. 06, pages 6 - 10 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116444845A (en) * | 2023-03-16 | 2023-07-18 | 珠海市城市排水有限公司 | Modified biodegradable straw and preparation method and application thereof |
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