CN107010724A - A kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application - Google Patents
A kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application Download PDFInfo
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- CN107010724A CN107010724A CN201710371963.6A CN201710371963A CN107010724A CN 107010724 A CN107010724 A CN 107010724A CN 201710371963 A CN201710371963 A CN 201710371963A CN 107010724 A CN107010724 A CN 107010724A
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- electron donor
- sulphur
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- sewage
- siderite
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/346—Iron bacteria
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
The invention discloses a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application.Described sustained release electron donor, it is included by siderite and sulphur with volume ratio 1:10~5:The compound of 1 composition.The sustained release electron donor wide material sources of the present invention, it is cheap.The method efficiency for the sewage deep denitrogenation that the present invention is provided is stable, sludge yield is small, have a extensive future.
Description
Technical field
The invention belongs to dirty (useless) advanced water treatment process field, and in particular to one kind is sustained electron donor and entered using it
The method of row sewage deep denitrogenation.
Background technology
Recycling sewage generated by making is the effective way for solving water crisis.At present, town domestic sewage is after two stage treatment, still
So contain certain density nitrogen-containing pollutant.If handled without advanced nitrogen, in water body of only being dissolved by the self-purification ability of enviroment
Nitrogen, larger pollutional load and eco-toxicity can be caused to environment.Therefore, the advanced nitrogen of exploitation high-efficiency and economic is newly square
Method, it has also become the focus of current sewage recycling area research.
Conventional denitrification technology needs to consume large amount of organic, and carbon source wretched insufficiency in secondary effluent from sewage treatment plant,
Denitrification effect extreme difference.Research is primarily upon the denilrification system using sulphur both at home and abroad at present, can be under anoxic or anaerobic condition
By the use of sulphur as electron donor, energy is obtained by the sulphur of redox state, while using nitrate as electron acceptor, being gone back
Originally it was nitrogen, so as to realize denitrification process, reaction equation is：55S+20CO2+50NO3 -+38H2O+4NH4 +→4C5H7O2N+25N2
+55SO4 2-+64H+.The H that sulphur denitrification process is produced+So that water outlet pH value reduction (＜ 5), has had a strong impact on reaction system
Denitrification effect.In engineering practice, sulphur denitrification generally and lime stone R. concomitans, i.e. SLAD systems.Lime stone is mainly used
To neutralize the acid produced in sulphur denitrification process, or bacterium provides inorganic carbon source.However, sulphur lime stone denitrification system
The substantial amounts of lime stone of system consumption, causes the water hardness higher.Lime stone is not contributed denitrogenation in itself, reduces unit volume anti-
Answer the efficiency of device denitrogenation.
The content of the invention
In view of this, it is sustained electron donor and using its progress sewage deep denitrogenation it is an object of the invention to provide a kind of
Method, to solve at least part technical problem present in above-mentioned prior art.
To achieve the above object, an aspect of of the present present invention provides a kind of sustained release electron donor, and it is included by siderite and sulphur
Sulphur is with volume ratio 1:10~5:The compound of 1 composition.
The sustained release electron donor of the present invention can be used in various anti-nitration reaction systems, such as the denitrification process of stain disease
In.
Wherein, the volume ratio preferably 1 of the siderite and sulphur:2~1:1, more preferably 1:2.
Wherein it is preferred to, the siderite and sulphur each grind to form a diameter of 0.1~5mm particle, then mix equal
It is even to use, it is highly preferred that the siderite and sulphur each grind to form a diameter of 0.1~0.5mm particle, then it is well mixed
Use.
Those skilled in the art it is to be understood that heretofore described siderite has its conventional sense in this area, its into
It is divided into FeCO3。
Another aspect of the present invention also provides a kind of bio-filter stuffing, and it includes foregoing sustained release electron donor.
The bio-filter stuffing can be as described in the routine of this area, it is preferable that the carrier bag of the bio-filter stuffing
Include but be not limited to microporous hollow ball.The preferred high density polyethylene (HDPE) of material or glass fibre of the microporous hollow ball；The micropore
The diameter and mesh count of hollow ball can be conventional for this area, it is preferable that a diameter of 5~50mm of the microporous hollow ball, institute
The mesh for stating microporous hollow ball is 80~300 mesh, it is highly preferred that a diameter of 20~50mm of the microporous hollow ball, described micro-
The mesh of hole hollow ball is 180~300 mesh.It is understood that the carrier of the bio-filter stuffing be not limited to it is above-mentioned
Microporous hollow ball, can also be from some other materials, specification and structure, as long as above-mentioned sustained release electron donor can be carried i.e.
Can.
Those skilled in the art are it is to be understood that the bio-filter stuffing supplies attached growth of microorganisms biofilm, the sustained release
Electron donor is filled in described carrier.
Another aspect of the invention also provides a kind of sewage disposal system, and it includes aforementioned biological filter tank filler.
Another aspect of the present invention also provides a kind of method that sewage deep denitrogenation is carried out using foregoing sewage disposal system,
It includes：
The domestication biofilm of sewage disposal system, and
Treatment sewage is passed through into the system after biofilm and carries out denitrogenation.
Wherein, the operation of the domestication biofilm can be that this area is conventional, first can be such as inoculated with into sewage disposal system
Then the excess sludge of appropriate sewage treatment plant tames typical biological denitrificaion bacterium (such as inoculation source by continuum micromeehanics
Sulphur denitrifying bacterium and ferrous oxidation bacterium), make it in the surface attachment biofilm growth formation of sustained release electron donor, be sustained electronics
Donor surface is the nucleus (hot-zone) of biological denitrificaion reaction.
Preferably, in the operation of the domestication biofilm, denitrifying bacteria, Ran Houlian first are inoculated with to the sewage disposal system
It is continuous to be passed through the sewage containing nitrate and tamed, denitrifying bacteria is adhered to and is grown on bio-filter stuffing, up to biofilm
Success.
Wherein, the preferred sulphur denitrifying bacterium of the denitrifying bacteria and ferrous oxidation bacterium, the sewage containing nitrate
PH value is preferably 6.8~7.3, it is highly preferred that during domestication, the extra addition decrement into the sewage containing nitrate
Dihydric phosphate, bicarbonate, sodium thiosulfate, frerrous chloride, sodium chloride, magnesium sulfate, calcium chloride and trace element are as tame and docile
Compound, until during biofilm success, the addition for taming thing is decremented into 0.
Compared with prior art, positive effect of the invention is：
1st, the invention provides a kind of new method for being sustained electron donor coordinated drive sewage deep denitrogenation, sparring is utilized
Ore deposit-sulfur compounds, as sustained release electron donor, are that denitrification process persistently provides electronics.Siderite denitrification process produces two
Carbonoxide, can continue to provide inorganic carbon source to ensure the growth metabolism demand of microorganism.Water outlet pH stable is 6.5~7.5
Between, it is not required to individually adjust pH value.
2nd, in bio-filter stuffing of the invention, because there is density variation in natural siderite and sulphur so that biological filter
The microcellular structure carrier of pond filler can avoid the phenomenon for being sustained electron donor layering and being flowed out with water outlet.
3rd, the sustained release electron donor wide material sources in the present invention, cheap；It is used as the micropore of bio-filter stuffing carrier
Structure is prepared simply, easy to use, it is easy to be engineered popularization and application.
4th, the new denitrogenation method efficiency that the present invention is provided is stable, sludge yield is small, have a extensive future.
Brief description of the drawings
Fig. 1 shows the structural representation of the bio-denitrifying sewage processing system in embodiment 1.
Fig. 2 shows the enlarged diagram of the bio-filter stuffing in the bio-denitrifying sewage processing system of embodiment 1.
[description of reference numerals]
Water inlet pipe 1
Intake pump 2
Bio-denitrifying sewage processing system 3
Bio-filter stuffing 4
It is sustained electron donor 5
Outlet pipe 6
Three phase separator 7
Microporous hollow ball carrier framework 8
Siderite 9
Sulphur 10
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with embodiment, and join
According to accompanying drawing, the present invention is described in further detail.
In view of prior art has foregoing a variety of drawbacks, in the R＆D process of the present invention, inventor has found, chooses a kind of
Both the H that in lime stone and sulphur denitrification process is produced can have been substituted+, while also can be as denitrifying electron donor, to dirt
Water treatment plant's secondary effluent deep purifying has critically important theory and practical significance.Practice by substantial amounts of research and repeatedly
Checking, inventor has found that ferrous oxidation bacterium can be by the use of ferrous iron as electron donor, by nitre under conditions of anoxic or anaerobism
Hydrochlorate is reduced to nitrogen, while producing basicity, reaction equation is：5FeCO3+NO3 -+12H2O→5Fe(OH)3+0.5N2+CO2+OH-。
Another inventor also found that the main component of natural siderite is FeCO3, it is widespread in nature, if by sulphur and day
Right both siderites are used cooperatively, then are capable of the advanced nitrogen of dirty (useless) water of coordinated drive, acid-base balance are maintained, while siderite
Denitrification process can produce carbon dioxide, can continue to provide inorganic carbon source to ensure that microorganism grows in sewage disposal system
The demand of metabolism, so as to obtain the present invention, its reaction equation is as follows：0.86S+5FeCO3+1.78NO3 -+12.59H2O+0.06NH4 +→0.06C5H7O2N+5Fe(OH)3+0.89N2+0.85SO4 2-+4.69CO2。
Some specific embodiments are set forth below, to make further to technical scheme and technique effect
It is bright.
Embodiment 1
The present embodiment provides a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application.Electronics is sustained to supply
Body is by siderite and sulphur by volume 1:The compound of 1 composition.First natural siderite is cleaned using 0.5% watery hydrochloric acid
Surface, grinds into a diameter of 2mm~5mm particle, and sulphur also cleans surface using 0.5% watery hydrochloric acid, ground
Into a diameter of 2mm~5mm particle, then by siderite particle and drusen with 1:1 volume ratio is used after uniformly mixing.
Above-mentioned sustained release electron donor is filled into the balloon borne body of microporous hollow, bio-filter stuffing is formed, microporous hollow ball
A diameter of 20mm, mesh is 180 mesh, and material is high density polyethylene (HDPE), and the filling proportion of sustained release electron donor is 90%, after filling
It is hermetically sealed using buckle.
The bio-filter stuffing that will be filled with being sustained electron donor is filled in bio-denitrifying sewage processing system, packing ratio
Example is at 1/2 system altitude.Denitrifying bacteria, including sulphur denitrifying bacterium and ferrous oxidation bacterium are inoculated with into system, is continuously passed through
Sewage containing nitrate is tamed, and denitrifying bacteria is adhered to and is grown on bio-filter stuffing, until biofilm success.Its
In, the pH value of the sewage containing nitrate is 6.8~7.3, during domestication, is additionally added into the sewage containing nitrate
Dihydric phosphate, bicarbonate, sodium thiosulfate, frerrous chloride, sodium chloride, magnesium sulfate, calcium chloride and the micro member of decrement
Element is as domestication thing, until during biofilm success, the addition for taming thing is decremented into 0.
After biofilm success, human configuration simulation secondary effluent, NO of intaking are pumped into3 -- N concentration be 20mg/L, pH be 6.8~
7.3, hydraulic detention time 12h is controlled, 30 DEG C of temperature makes microorganism fully be contacted with processing waste water, a water is taken every 12h
Sample, determines its water quality index.
As a result show, the bio-denitrifying sewage processing system of the present embodiment can reach nitrate clearance in 12 hours
To 85%, pH stable is 6.9~7.5, it is not necessary to individually adjust pH value.
The bio-denitrifying sewage processing system of the present embodiment refer to shown in Fig. 1, and the substantially process of its work is as follows：Sewage
The secondary water outlet of factory is extracted through intake pump 2 is delivered to bio-denitrifying sewage processing system 3 by water inlet pipe 1.Filled out in microporous hollow ball
Sustained release electron donor 5 is filled, the two constitutes bio-filter stuffing 4.Then biological filter is filled in bio-denitrifying sewage processing system 3
Pond filler 4, biofilm reactor is formed as the bio-filter stuffing 4 of adaptive bio-carrier after domestication biofilm.Sewage
Current in biological denitrificaion processing system 3 use upward flow form, and secondary water outlet flows through biofilm reactor successively from bottom to top
The bio-filter stuffing 4 for the biofilm that succeeded, contacts completion denitrification process with sustained release electron donor 5, is finally flowed out by outlet pipe 6
Denitrification system, and collect aerogenesis with three phase separator 7.
The enlarged drawing of bio-filter stuffing 4 shown in Fig. 1 is as shown in Fig. 2 it is by the outside balloon borne body bone of microporous hollow
Frame 8 is constituted with the siderite 9 and sulphur 10 that are filled in inside, and wherein the ratio of each several part, shape, dimensions and quantity are more
It is few only to make to illustrate, the performance of the present invention is not limited with this.
Embodiment 2~3
Embodiment 2~3 provides a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application respectively.They
Operation with embodiment 1 is essentially identical, the difference is that only the specification of sulphur and siderite in sustained release electron donor not
Together.Wherein, the siderite and sulphur in embodiment 2 be diameter be 0.5mm~2mm particle, siderite in embodiment 3 and
Sulphur be diameter be 0.1mm~0.5mm particle, the result of embodiment 2 and 3 and with the result of embodiment 1
Compare as shown in table 1.From table 1 it follows that the particle of siderite and sulphur is smaller, the effect of denitrogenation is better, and pH's is steady
It is qualitative also higher.
Denitrification effect in the embodiment 2~3 of table 1
Embodiment 4~8
Embodiment 4~8 equally distinguishes a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application.They
Operation with embodiment 1 is essentially identical, the difference is that only the compound proportion of sulphur and siderite in sustained release electron donor not
Together.Wherein, the sustained release electron donor in embodiment 4 is by siderite and sulphur by volume 1:The compound of 2 compositions, embodiment
Sustained release electron donor in 5 is by siderite and sulphur by volume 2:Sustained release electronics in the compound of 1 composition, embodiment 6
Donor is by siderite and sulphur by volume 1:Sustained release electron donor in the compound of 10 compositions, embodiment 7 is by sparring
Ore deposit and sulphur by volume 1:Sustained release electron donor in the compound of 5 compositions, embodiment 8 is by volume by siderite and sulphur
Than 5:The compound of 1 composition.The result of embodiment 4~8 and as shown in table 2 with the comparison of the result of embodiment 1.From
As can be seen that the volume ratio of siderite and sulphur is 1 in table 2:When 2, the best results of denitrogenation, pH stability is also optimal.
Denitrification effect in the embodiment 4~8 of table 2
Embodiment 9
Embodiment 9 equally provides a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application.They with
The operation of embodiment 1 is essentially identical, the difference is that only a diameter of 50mm of microporous hollow ball, and mesh is 300 mesh, packing ratio
Example is 85%, as a result shows NO3 -- N clearances, which can reach more than 70%, pH, can stablize 6.8~7.3.
Embodiment 10
Embodiment 10 equally provides a kind of method for being sustained its progress sewage deep denitrogenation of electron donor and application.They with
The operation of embodiment 1 is essentially identical, the difference is that only a diameter of 50mm of microporous hollow ball, and mesh is 180 mesh, packing ratio
Example is 85%, as a result shows NO3 -- N clearances, which can reach more than 70%, pH, can stablize 6.8~7.3.
Comparative example 1
Sewage deep denitrogenation is carried out using sulphur and natural siderite as electron donor, and it is carried out with embodiment 1
Contrast test.In contrast test, all equal be the same as Examples 1 of parameter setting, it the difference is that only the difference of electron donor, knot
Fruit is as shown in table 3：
Table 3 is sustained influence of the electron donor to denitrification effect
From table 3 it can be seen that the denitrification system nitrate of filling siderite-sulphur composite slow release electron donor was at 12 hours
Interior clearance reaches 85%, and pH stable is 6.9~7.5, it is not necessary to individually adjust pH value.And sulphur or siderite is separately filled
Denitrification system, not only nitrate removal rate can only achieve 70% and 77.5%, and the two water outlet pH value respectively in acidity
And alkalescence, it is unsuitable for microorganism growth.
The sustained release electron donor that the present invention is provided it can be seen from the result of the various embodiments described above and comparative example is filled in life
In thing denitrification system, higher nitric efficiency can not only be kept when system works, and can make pH stable in neutrality, no
Need individually to adjust pH value.Therefore in actual applications, the life of siderite-sulphur composite slow release electron donor equipped with the present invention
Thing filter tank filler just turns into a kind of adaptive bio-carrier, ensure that the normal enrichment and growth of microorganism.
It has to be noted that the carrier (microporous hollow ball) of the bio-filter stuffing used in each embodiment, its diameter
Other specifications are can also be with mesh count, such as a diameter of 5~20mm or mesh count are 80~180, to coordinate corresponding particle diameter
Sustained release electron donor particle use, experiment shows also realize suitable even more excellent technique effect substantially.Meanwhile, it is micro-
The material of hole hollow ball is without high density polyethylene (HDPE) is defined to, and other plastic materials, such as glass fibre material also can
Realize suitable even more excellent technique effect substantially.The carrier of the bio-filter stuffing used in each embodiment can not also be limited
In the spherical structure as microporous hollow ball, the porous carrier of other shapes and structure is also applied for the present invention, also can be real
Existing suitable even more excellent technique effect substantially.
In addition, inventor also found, in bio-filter stuffing of the invention, there is density variation in natural siderite and sulphur,
The microcellular structure carrier of bio-filter stuffing can avoid the phenomenon for being sustained electron donor layering and being flowed out with water outlet, such as implement
In example 1, ensure denitrification system nitrate clearance in 12 hours reach 85%, pH stable while 6.9~7.5,
The losss proportion of sustained release electron donor is always held at very low level, and only 1%~2%, so that it is electric to greatly save sustained release
The cost of sub- donor cost in itself and subsequent treatment process.
The new denitrogenation method efficiency that the present invention is provided is stablized, sludge yield is small, have a extensive future.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. one kind sustained release electron donor, it is included by siderite and sulphur with volume ratio 1:10~5:The compound of 1 composition.
2. sustained release electron donor according to claim 1, wherein, the volume ratio of the siderite and sulphur is 1:2~1:
1, more preferably 1:2.
3. sustained release electron donor according to claim 1 or 2, wherein, the siderite and sulphur each grind to form diameter
For 0.1~5mm particle, then it is well mixed and uses；
It is highly preferred that the siderite and sulphur each grind to form a diameter of 0.1~0.5mm particle, being then well mixed makes
With.
4. a kind of bio-filter stuffing, it includes the sustained release electron donor described in any one of claims 1 to 3.
5. bio-filter stuffing according to claim 4, wherein, the carrier of the bio-filter stuffing includes microporous hollow
Ball.
6. bio-filter stuffing according to claim 5, wherein, the material of the microporous hollow ball includes high-density polyethylene
Alkene or glass fibre；A diameter of 5~50mm of the microporous hollow ball；The mesh of the microporous hollow ball is 80~300 mesh；
It is highly preferred that a diameter of 20~50mm of the microporous hollow ball；The mesh of the microporous hollow ball is 180~300 mesh.
7. a kind of sewage disposal system, it includes the bio-filter stuffing described in any one of claim 4~6.
8. a kind of method that sewage disposal system using described in claim 7 carries out sewage deep denitrogenation, it includes：
The domestication biofilm of sewage disposal system, and
Treatment sewage is passed through into the system after biofilm and carries out denitrogenation.
9. method according to claim 8, wherein, in the operation of the domestication biofilm, first to the sewage disposal system
System inoculation denitrifying bacteria, is then continuously passed through the sewage containing nitrate and is tamed, make denitrifying bacteria in bio-filter stuffing
Upper attachment and growth, until biofilm success.
10. method according to claim 9, wherein, the denitrifying bacteria includes sulphur denitrifying bacterium and ferrous oxidation bacterium；
The pH value of the sewage containing nitrate is 6.8~7.3；
It is highly preferred that during domestication, extra dihydric phosphate, the carbonic acid for adding decrement into the sewage containing nitrate
Hydrogen salt, sodium thiosulfate, frerrous chloride, sodium chloride, magnesium sulfate, calcium chloride and trace element as domestication thing, until biofilm into
During work(, the addition for taming thing is decremented to 0.
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| CN201910123257.9A CN109879415B (en) | 2017-05-24 | 2017-05-24 | Slow-release electron donor and method for deep denitrification of sewage by using same |
| CN201710371963.6A CN107010724B (en) | 2017-05-24 | 2017-05-24 | A method of it being sustained electron donor and carries out sewage deep denitrogenation using it |
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Cited By (8)
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|---|---|---|---|---|
| CN107487840A (en) * | 2017-09-04 | 2017-12-19 | 沈阳东源环境科技有限公司 | The biofilter material of nitrate nitrogen in a kind of processing water |
| CN108033557A (en) * | 2017-12-18 | 2018-05-15 | 中原环保股份有限公司 | A kind of denitrogenation filler and the method for city sewage deep denitrogenation |
| CN109368769A (en) * | 2018-12-20 | 2019-02-22 | 北京梅凯尼克环保科技有限公司 | A kind of autotrophic type deep-bed filter using novel compound filling |
| CN109592797A (en) * | 2019-01-31 | 2019-04-09 | 东北大学 | A kind of preparation method of denitrification denitrogenation material |
| CN110156267A (en) * | 2019-05-30 | 2019-08-23 | 中国科学院生态环境研究中心 | The micro- oxygen of catalysis oxidation-strengthens process for purifying water and water purification system |
| CN110776089A (en) * | 2019-11-07 | 2020-02-11 | 苏州方舟环境发展有限公司 | Denitrification filter material |
| CN114524511A (en) * | 2022-01-28 | 2022-05-24 | 大连理工大学 | Alkalinity slow-release porous spherical shell suspended filler based on sulfur autotrophic nitrogen removal of low C/N sewage |
| CN114524513A (en) * | 2022-01-28 | 2022-05-24 | 大连理工大学 | Method for treating low C/N sewage by anaerobic-aerobic-anoxic-moving bed autotrophic denitrification process |
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| CN116272645B (en) * | 2023-05-11 | 2023-08-04 | 中建环能科技股份有限公司 | Sewage denitrification carrier preparation system and preparation method |
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| CN108033557A (en) * | 2017-12-18 | 2018-05-15 | 中原环保股份有限公司 | A kind of denitrogenation filler and the method for city sewage deep denitrogenation |
| CN109368769A (en) * | 2018-12-20 | 2019-02-22 | 北京梅凯尼克环保科技有限公司 | A kind of autotrophic type deep-bed filter using novel compound filling |
| CN109592797A (en) * | 2019-01-31 | 2019-04-09 | 东北大学 | A kind of preparation method of denitrification denitrogenation material |
| CN110156267A (en) * | 2019-05-30 | 2019-08-23 | 中国科学院生态环境研究中心 | The micro- oxygen of catalysis oxidation-strengthens process for purifying water and water purification system |
| CN110776089A (en) * | 2019-11-07 | 2020-02-11 | 苏州方舟环境发展有限公司 | Denitrification filter material |
| CN114524511A (en) * | 2022-01-28 | 2022-05-24 | 大连理工大学 | Alkalinity slow-release porous spherical shell suspended filler based on sulfur autotrophic nitrogen removal of low C/N sewage |
| CN114524513A (en) * | 2022-01-28 | 2022-05-24 | 大连理工大学 | Method for treating low C/N sewage by anaerobic-aerobic-anoxic-moving bed autotrophic denitrification process |
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|---|---|
| CN109879415A (en) | 2019-06-14 |
| CN109879415B (en) | 2021-03-16 |
| CN107010724B (en) | 2019-03-12 |
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