CN107162364A - Deliver the method that modified zeolite quick in situ administers river course Deng Heichou waters - Google Patents
Deliver the method that modified zeolite quick in situ administers river course Deng Heichou waters Download PDFInfo
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- CN107162364A CN107162364A CN201710436154.9A CN201710436154A CN107162364A CN 107162364 A CN107162364 A CN 107162364A CN 201710436154 A CN201710436154 A CN 201710436154A CN 107162364 A CN107162364 A CN 107162364A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- 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
- Y02W10/20—Sludge processing
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Abstract
It is a kind of that natural zeolite is modified, its ammonia absorption value is improved, can be activated repeatedly automatically, with the long-term function of inhaling ammonia, put nitrogen.After the black sordes matter for removing river bottom mud in the original location with black sordes matter remover, put into sand-blasting machine in river course Deng Heichou waters, utilize the natural flowing in artificial aeration and waters, the change of temperature, air pressure, zeolite and its around water body and bed mud in produce oxygen content fluctuation, make nitrifier, denitrifying bacterium active in turn, the great the same miniature clarifier in similar cass ponds of quantity of formation, the self-purification capacity so as to improving the waters such as river course.Accomplish in the case where changing river course and other waters present situations and original ecosystem structure without engineering measure, the method for making black smelly waters obtain purified in situ.This method is widely used, and dispensing mode is slightly modified and just can be used for the water outlet upgrading of existing sewage treatment plant up to standard, breeding water body purification, the processing of various high nitrogenous trade effluents.Suitable Chinese population is more, and the scarce national conditions in water source, pollution treatment facility is few, does not take up an area, and construction investment is saved, and treatment effeciency is high, and operating cost is low, and secondary pollution and dirt transfer are not produced.
Description
Technical field：
It is a kind of that natural zeolite is modified, its ammonia absorption value is improved, is made it have and long-term inhaled ammonia, puts nitrogen and can be repeatedly automatic
The function of activation；Modified zeolite is put into river course Deng Heichou waters, the self-purification capacity of the water bodys such as river course and bed mud is improved, accomplishes
In the case where changing river course and other waters present situations and original ecosystem structure without engineering measure, obtain black smelly waters
The method of fast purification in situ.
Technical background：
River course and other black smelly aquatic ecosystems include the parts such as embankment, water body, bed mud, riverbed, biology, microorganism.
Black smelly waters is caused by external contaminant and this ecosystem interaction, disequilibrium.The polluted water regions such as river course
The ecosystem have self-purification capacity originally, after pollutant within certain limits is discharged into, by diffusion, dilution, precipitate with
And plant, the utilization of microorganism, decomposition, the absorption of soil is can to return to original state, and this process is exactly waters
Self-cleaning.If the pollutant for being discharged into water body has exceeded the boundary of the ability of the river self-purification, the pollutant into water body cannot lead to
Cross self-cleaning and digest, permeated the ground if being not added with administering into the black smelly waters of permanent contact scar, black and odorous water, pollutant will
Pollute surrounding large underground area water and soil.
River course waters pollutant mainly has organic matter, nutriment, heavy metal, also has a small amount of poisonous, noxious pollutant, this
A little pollutants can be deposited in bed mud after entering water body by the various ways such as absorption, flocculation, precipitation, bio-absorbable, through long
Phase is enriched with, and the concentration of the pollutant in bed mud is higher by the several orders of magnitude of overlying water sometimes, when changes in environmental conditions, in bed mud
Pollutant can return to again secondary pollution is produced in water body, three pollutions ....So administering the pollution in river course Deng Heichou waters, both
Administer external source and administer endogenous again；Water body should be administered, bed mud is administered again, this is administer river course Deng Heichou waters first
Individual feature.
Second feature that China river course Deng Heichou waters is administered is exactly that the pollution sources in most of black smelly waters are trophism
Nitrogen, phosphorus compound, organic matter, heavy metal pollution is not serious.Performance is the Eutrophication in the waters such as river.This is the state of China
Caused by feelings, the food eaten of having a large population is more, and the waste of row is more, and washes is more, and waste among these is mainly nitrogen, phosphorus, organic
The nutrient compounds such as thing.China's water resource is not enough, it is impossible to goes to dilute with substantial amounts of water, rinse these pollutants, then trophism
Pollutant is just enriched with the populations such as city, the rural area densely waters of side, gradually into black smelly waters.Foreign population is relatively
Less, the problem of water resource relative abundance, waters eutrophication of their theres, wants gently many.Therefore, China draws from foreign countries the past
The sewage disposal technology entered can't resolve Chinese distinctive eutrophication problem, and simple foreign country of learning sets up large-scale wastewater treatment plant,
Though there is certain effect, one of the reason for instead occurring everywhere into black smelly polluted water region to a certain extent.
The river regulation method of present main flow has physics, chemistry, biological and ecological method and their synthesis.Physical method
Mainly there is external source to dam, dredge bed mud, water transfer is quenched, water body embankment is controlled altogether, substantially engineering measure, basic to substantial amounts of bed mud
Shifting processing will be carried out with flood tide fund, several ten million yuans of input is typically wanted in one kilometer slightly larger of river regulation；Change
Method mainly has coagulating sedimentation, medicament to kill algae, costly.And in terms of technique effect, this two classes method can only substantially change
The presence place of pollutant, can not reduce pollutant.Biological and ecological method mainly has river aeration oxygenation, biological prosthetic, soil
Processing, plant (microorganism) purification, using can suitably reduce the presence of pollutant, but governance efficiency is very low, administers the time very
It is long, administer fast without pollution development.Due to not meeting the technology of China's actual conditions also, most places are when administering bid, and company goes
Except the index of ammonia nitrogen dare not all make demands, this method for avoiding principal contradiction is can not to solve the improvement in black smelly waters.
The present invention is sought to adapt to this requirement, and on the basis of existing technology, natural zeolite is modified, it is improved
Ammonia absorption value, it can be activated repeatedly naturally, makes it have the function steady in a long-term of inhaling ammonia, put nitrogen.Modified zeolite is put into river course
Etc. in black smelly waters, the long-term self-purification capacity of the polluted-waters such as river course and bed mud is improved, accomplishes changing river without engineering measure
In the case of road and other waters present situations and original ecosystem structure, the method for making black smelly waters obtain purified in situ.It is necessary
When add a small amount of nitrogen, phosphorus, cod removers, administer water body and bed mud quick in situ, walk out a river for meeting China's actual conditions
The way that the waters such as road are administered.
The content of the invention：
1st, the manufacture of modified zeolite：China's natural zeolite is very abundant, and only Guo Tou flourishing age Science and Technology Co., Ltd. in Beijing exists
The zeolite reserves that Weichang has right to mine just have 1,500,000,000 tons.The excellent properties of zeolite are that have exchange and absorption to make to cation
With, and with selectivity.But natural zeolite is directly used in sewage disposal, often effect is undesirable, it is necessary to by changing
Property, its ammonia absorption value is improved, and can voluntarily activate repeatedly.Modified method, first will use Zeolite modifying agent in Zeolite modifying machine
Solution, soaks modified 2-3 hours under 80-90 DEG C of constant temperature, while ceaselessly high-speed stirred, excludes the blocking in zeolite cavity
Thing, gets through the natural hole of zeolite；Two will carry out the ionic nature of ion exchange during nitrogen according to inhaling ammonia, putting, and use deionization
Water removes other ions noisy to exchange ion；Three are toasted in high temperature drying case with 300-350 DEG C of temperature, row
Except the natural water in duct, expand adsorbable space, increase adsorbance；Four will be according to absorption Properties of Objects, the method for separation
Deng, other adsorbents are added, and the adsorbent of addition and zeolite is combined closely, form overall.For example, in swiftly flowing river
In road, it is impossible to zeolite is delivered into river course, can only in pumping station, using super Magneto separate mode, river in magnetic separation system in short-term
Between pass through, leave dirt, water flows back to river course again, at this moment modified zeolite to deliver water inlet reaction tank in, in a short period of time
Dirt is sucked in zeolite, then modified zeolite is separated in the magnetic field of super magnetic separator, recycled, this zeolite
Just ferroso-ferric oxide should be added when being modified, and allow it closely to become entirety with zeolite；Dephosphorization while denitrogenating is needed,
It will be additional addition adsorbent with calper calcium peroxide, and allow it to be combined with zeolite.If nitrifier, denitrifying bacterium are not enough in waters,
This two kinds of strains will be combined as a whole with modified zeolite, delivered simultaneously.
2nd, the elimination of black smelly bed mud：Modified zeolite will be one or manyly with the instrument agitation water such as ship band propeller before delivering
Domain bed mud, makes the black smelly bed mud in upper strata be mixed with overlying water, disappears while spraying black sordes matter into the mixture of bed mud and overlying water
Except agent, the black sordes matter such as H2S in water body and bed mud are rapidly removed, eliminate that pollution is endogenous, number of repetition is defined by being actually needed.
Assuming that the molecular formula of black sordes matter remover is XO2, black sordes matter is mainly H2S, then its reaction equation：
8XO2+5H2S+4H2O→5H2SO4+8Hx
The meeting such as heavy metal immediate response, generates inorganic salts and precipitates in product and water.Black and odorous water and bed mud will gradually
Become colorless and odorless, cod can decline to a great extent.
3rd, the dispensing of modified zeolite：Modified zeolite is directly sprinkled into urban river water by the wide available boat-carrying sand-blasting machine in river course；River
Road is narrow to be sprinkled on bank with sand-blasting machine in river course, become a part for new river bottom mud.After modified zeolite input
As long as it is not walked clearly, so that it may which long-term performance suction ammonia puts nitrogen effect in river course, realized certainly as river course cleaning nutrition contact scar
The net main force, any secondary pollution is not had.
4th, modified zeolite is maintained to inhale the activation method repeatedly that ammonia puts nitrogen function for a long time：Selectivity order of the ammonia in zeolite adsorption
In be in forward position.Ammonia nitrogen in sewage exists in water and bed mud in the form of free ammonia and ion ammonia.In modified zeolite
Put into the time of more than one day behind waters, to allow zeolite to rest on bed mud surface, by the suction-operated of modified zeolite, ion
Ammonia can largely enter zeolite cavity, and free ammonia can be converted into ion ammonia, and zeolite sand and its surrounding are nitrification and denitrification bacteriums
The growth liked, breeding spot, allow its modified zeolite and its around be enriched with.Then it can just start timing aeration, interruption to stand,
Create the rich oxygen of interruption, anaerobic environment.When oxygen is sufficient, nitrobacteria is active, by its aerobic respiration, can be by mineralized nitrogen
Nitrate nitrogen, nitrite nitrogen；And in the case of anoxic, denitrifying bacterium is active, nitrate nitrogen and nitrite nitrogen can be reduced into water and
Nitrogen is released.
Reaction equation is：
NH4++2O2- → NO3-+H2O+2H+ (nitration reaction)
NO3-+H+ → N2+H2O+OH- (anti-nitration reaction)
After ammonia nitrogen in the duct of modified zeolite is released, ammonia nitrogen, that is, activation can be adsorbed again again, so that in water body
With countless miniature ammonia nitrogen arresters worked for a long time are formed in bed mud.Allow these ammonia nitrogen arrester Effec-tive Functions it is necessary to
On the premise of the natural trend condition of natural river course flow velocity, water temperature, air pressure is given full play to, it is aided with aeration, stirs, plastic covering
The measures such as cloth, standing, rich oxygen, the condition of anoxic loop cycle as creating a similar artificial CASS pond, make modified zeolite
And its microorganism of surrounding, when and in rich oxygen, when and in anaerobic condition, modified zeolite and its around constantly occur to inhale
Ammonia-nitrification-denitrification-puts nitrogen-inhaling ammonia again-and nitrifies-the process of denitrification ... again again, makes the suction ammonia of modified zeolite, puts nitrogen ability
Long-term lasting performance, so that the self-purification capacity in river course rises to a new height.Such a benign recurrent state, it is certainly modified
It can be set up in left and right within about one month after zeolite input.Indivedual river courses (such as containing toxicant), modified zeolite auto-activation
It is bad, activator No. one or No. two can be affixed by, promotes the foundation of alternate relation, each 10 grams/acre of rice of consumption.
5th, it is affixed by the measure of ammonia nitrogen, total phosphorus and cod removers：Modified zeolite go the effect of ammonia nitrogen be it is steadily lasting,
When river sewage sends out larger fluctuation or there are other special requirements, ammonia nitrogen, total phosphorus and cod are fallen in a short time, at this moment
Supplement is used as to add a small amount of ammonia nitrogen, total phosphorus and cod removers.Ammonia nitrogen, total phosphorus and the cod removers that we use are a kind of
The mixture aqueous solution of 4 valencys and 6 valency oxides, if its molecular formula is：Wo2, wo3, and they are unstable materials, because w
Stable state is -1,-divalent.The w ions of such a high chemical valence oxide must will move towards stable state in sewage, at this
During a w ion will release 5,6 and 7,8 electronics, exactly these excess electrons are in ammonia nitrogen, total phosphorus and cod is removed
Key effect is played.By taking processes of the wo2 to stable state transition as an example, its reaction in sewage is as follows：
WO2+NH4-N+5e→W-1+H2O+N2↑
Want to add ammonia nitrogen and cod removers, how much is benefit, when mendsWill be according to the reality and need of each engineering
Determine.Add after ammonia nitrogen, phosphorus and cod removers, can be taken effect within a few minutes.
6th, the method for accommodation of the present invention is expanded.This technology invention can be used for the slow river course of flow velocity, with magnetic separator knot
Conjunction can be also used in the fast river course of flow velocity, somewhat changes dispensing and Land use systems can also be in the water outlet upgrading of various sewage treatment plants
Use, let alone used in the water body purification of aquaculture.For example with magnetic separation system, it is being by modified zeolite dispensing
At system water inlet, ammonia nitrogen and cod dirts in magnetic separation system operation in modified zeolite absorption river, in the magnetic field of magnetic separator
It is middle to separate modified zeolite and water body, zeolite reuse.The present invention can be used in all sewage treatment plants water outlet at, reduction ammonia nitrogen and
Cod, method is：Modified zeolite layering is laid in sand filtration machine, allow it is treated but can not water up to standard flow through sand filtration machine, through changing
It is up to standard to release again after property zeolite sand filtration.The present invention is in the exceeded existing sewage treatment plant of ammonia nitrogen and all high nitrogen-containing sewages
Using there is special effect in processing.
The unique advantage of this technology is：
1st, it is conceived to the long-term self-purification capacities in waters such as raising river course, the pollutant in waters is administered in real reduction, rather than
Pollutant is shifted.What is released and precipitate is all nontoxic, harmless material.
2nd, the key of black smellyization in river course waters has really been caught, the trophism such as nitrogen, phosphorus are carried out
The decrement of material.It can also reduce cod and heavy metal simultaneously.
3rd, it is in situ to administer, do not change the improvement original ecology of water structure in area substantially, reduce pipeline and focus on field
Construction and construction investment, the cost of transportation of shifting processing, reduce land seizure.Avoid pollutant transfer and it is secondary,
Three times ... pollution.
4th, it is widely used.It can be not only used for the slow river regulation of flow velocity, it is also possible in the fast river course of flow velocity, somewhat change and deliver
Being used in Land use systems in the processing of the exceeded existing sewage treatment plant of ammonia nitrogen and all high nitrogen-containing sewages has special effect.
5th, take up an area less, facility is few, construction cost is saved, processing speed is fast, and operating cost is low.
Case study on implementation：
Case 1, on March 15th, 2017 take out black foul sewage water from Chengdu Er Dao korneforos, its ammonia nitrogen are surveyed for 98.3mg/L, by this
Kind of sewage 400ml, which is put into one, sealedly in pop bottle, can add 3% prefabricated modified zeolite, be shaken with replacing to uncap
Shake, the method that tight lid is stood changes oxygen-containing situation in bottle.Ammonia-nitrogen content in a water is surveyed every a period of time, it is as a result as follows：
Experiment proves that under above-mentioned simulated conditions made modified zeolite is to hold in the slow river course of geo-stationary or flow velocity
Supervention wave suction ammonia put nitrogen function.Such as to simulate river flow it is fast in the case of modified zeolite continuously inhale ammonia put nitrogen situation it is necessary to
Change processed sewage into untreated sewage, test finite number of time, data result can be similar.
Case 2, my company are the resolution that Suzhou river course is formulated
First, the situation that user provides：
300 meters of black-odor riverway total length, it is average wide 20 meters, it is deep 3 meters.On 2 22nd, 2017 water quality measurement analytical conclusions：Quan He
Bad five class of water quality, overstandard factor ammonia nitrogen is 13.1 times of national five classes water quality standard, 5.6 times of total phosphorus, 2.4 times of (downstreams 1.4 of cod
Times).Averagely there is the inflow of 1500 side's sanitary sewages daily.
2nd, resolution：
1st, management goal：Take input modified zeolite, with regular alternative aeration, stand mode, create it is steady in a long-term inhale ammonia,
The condition of nitrogen is put, is aided with and irregularly sprays a small amount of cod and ammonia nitrogen, the method for the total phosphorus remover aqueous solution, make river water quality all the time
Keep v class water quality.
2nd, facility is equipped with：Need to utilize existing one, canoe, there is propeller, sandblasting and spraying apparatus on ship；Need to utilize
Existing aeration facility in existing river course.
3rd, operating process：
1) the black smelly bed mud agitation on river course upper strata is got up with the propeller on ship, mixes, sprayed into the water of mixing with water
Black and odorous water remover is spilt, existing black sordes matter is substantially eliminated.
2) modified zeolite is delivered：The side of existing waterway water (350x20x3) about 20000, is delivered, it is necessary to change in 2% ratio
400 tons of zeolite of property.
3) a small amount of Cod and ammonia nitrogen, total phosphorus remover are added.Deliver and complete, it is up to standard in one week.
4) regular maintenance keeps long-term water quality reaching standard：After up to standard first, a staff is determined, under normal circumstances, often
Its aeration 2-3 hours, under abnormal condition, will add modified zeolite, cod if necessary according to the change of water quality that water is caused is entered
With ammonia nitrogen removal agent, it is ensured that stably reaching standard.
Claims (8)
1. a kind of be modified to natural zeolite, improve its ammonia absorption value, allow it to have auto-activation repeatedly, steadily in the long term inhale ammonia,
Put the function of nitrogen；Remove in the original location after the black sordes matter of bed mud, modified zeolite is put into river course Deng Heichou waters, improve river course etc.
The long-term self-purification capacity of polluted-water and bed mud, accomplishes changing river course and other waters present situations and original life without engineering measure
In the case of state system architecture, the method for making black smelly waters and bed mud obtain purified in situ.
2. the minimizing technology in situ of black smelly bed mud：Modified zeolite will be stirred with instruments such as ship band propellers one or manyly before delivering
Dynamic waters bed mud, makes the black smelly bed mud in upper strata be mixed with overlying water, while spraying black smelly into the mixed water body of bed mud and overlying water
Material remover, rapidly removes the black sordes matter such as H2S in water body and bed mud, eliminates that pollution is endogenous, and number of repetition is with actual need
It is defined.
3. the primary operational program for purifying the waters such as river course using modified zeolite is；With propeller agitator by upper strata bed mud and upper
Cover water and black sordes matter remover → dispensing modified zeolite → mix → is sprayed into mixing water and is taken and be interrupted the measures such as aeration, standing
While making modified zeolite alternating performance suction ammonia, put nitrogen function, also make itself constantly to activate.→ if necessary increase throw cod, ammonia nitrogen,
Total phosphorus remover, quickly increases water quality.
4. the method for Zeolite modifying：First will be soaked with Zeolite modifying agent solution in Zeolite modifying machine under 80-90 DEG C of constant temperature
Zeolite 2-3 hours, while ceaselessly high-speed stirred, excludes the tamper in zeolite cavity, get through the natural hole of zeolite；Two will
The ionic nature of ion exchange is carried out during nitrogen according to inhaling ammonia, putting, with deionized water remove it is noisy to exchange ion its
His ion；Three are toasted with drying baker at 300-350 DEG C to modified and clean zeolite, exclude the natural water in duct,
Expand adsorbable space, increase adsorbance；Four will separate method of pollutant etc. according to absorption Properties of Objects, it is determined whether
Need to add other adsorbents and composition, and additive is combined closely with zeolite, form overall, for example, it is desired to use super magnetic
What is separated should just add ferroso-ferric oxide, and allow it closely to become entirety with zeolite；Dephosphorization while denitrogenating is needed, just
It is addition adsorbent with calper calcium peroxide, allows it to be combined with zeolite.If necessary can be by nitrifier, denitrification strain and modified zeolite
With reference to being integrated, deliver simultaneously.
5. the method that modified zeolite is activated repeatedly：Modified zeolite is delivered after water, allows it to rest on bed mud top layer more than 24 hours,
Optionally fully absorb the pollutants such as ammonia nitrogen, allow the nitrification and denitrification Enrichment of bacteria in water zeolite and its around.24 is small
Shi Houke starts to create the rich oxygen of water body, anaerobic environment with the mode that aeration, standing are changed in turn, allows nitrification and denitrification bacterium to take turns
Stream is active, and mineralized nitrogen is nitrate nitrogen, nitrite nitrogen by nitrifier；Denitrifying bacterium by nitrate nitrogen and nitrite nitrogen be reduced into water and
Nitrogen is released, and while the raising self-purification of water is spent, also modified zeolite is activated repeatedly, is used for a long time.
6. it is affixed by the measure of ammonia nitrogen, total phosphorus and cod removers：Occur larger fluctuation in river sewage or there are other special requirements
When, with high chemical valence unstable state oxide as enhancement remover, when it moves towards stable state, the flood tide excess electron of releasing,
Rapidly remove ammonia nitrogen, total phosphorus and cod.
7. delivering goods and materials needed for implementing foregoing invention has modified zeolite, black sordes matter scavenger, increase cod if necessary, ammonia nitrogen, total
Phosphorus ligands agent, nitrifiers and denitrifiers；Equipment has two parts, and a part is that the equipment for manufacturing modified zeolite includes Zeolite modifying
Machine, zeolite rinsing maching, special deionizing water machine, high temperature drying stove；Two parts are that equipment needed for field conduct is included with stirring
Propeller, sandblasting, the canoe of spraying facility, interruption aeration facility.
8. expand the method for purposes of the present invention：The simple dispensing for changing modified zeolite and Land use systems, can expand the present invention significantly
Purposes, for example by modified zeolite deliver in magnetic separation system, the present invention can be used in fast flow velocity big flow river course purification in；Will
Modified zeolite layering is laid in sand filtration machine, allow it is treated but can not water up to standard flow through sand filtration machine, it is up to standard after release, this can be made
Invention is applied in the upgrading of existing sewage treatment plant and the processing of all high nitrogen-containing sewages.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107759040A (en) * | 2017-11-29 | 2018-03-06 | 环境保护部南京环境科学研究所 | A kind of method efficiently in situ for administering the pollution of mud Inner sources |
| CN109607996A (en) * | 2018-12-20 | 2019-04-12 | 苏州科技大学 | Restorative zeolitic material of a kind of promotion bed mud and preparation method thereof |
| CN115611435A (en) * | 2022-09-28 | 2023-01-17 | 淮阴工学院 | Preparation method of bionic sediment with functions of efficiently adsorbing and efficiently converting nitrogen pollutants |
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