CN106927574B - A kind of drowned flow artificial wet land containing natural minerals and its methods and applications for handling glyphosate waste water - Google Patents
A kind of drowned flow artificial wet land containing natural minerals and its methods and applications for handling glyphosate waste water Download PDFInfo
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- CN106927574B CN106927574B CN201710251715.8A CN201710251715A CN106927574B CN 106927574 B CN106927574 B CN 106927574B CN 201710251715 A CN201710251715 A CN 201710251715A CN 106927574 B CN106927574 B CN 106927574B
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a kind of drowned flow artificial wet land containing natural minerals and its methods and applications of processing glyphosate waste water, belong to water treatment field.The artificial swamp belongs to drowned flow artificial wet land, and using a certain proportion of natural magnetic iron ore filling, the clay for plant growth is filled on top for packing area.The artificial swamp can remove the glyphosate pesticide in water body by the absorption of natural troilite and the chemical action of biochemical reaction product, and the Phos generated after glyphosate pesticide decomposes in wetland can be removed simultaneously, has the effect of the organic and Phos of synchronous removal.At the same time also with the deep purifying effect of certain COD, ammonia nitrogen and total nitrogen.The invention has convenient for management, and at low cost, the advantages of the resource utilization of natural crystal, application prospect is extensive.
Description
Technical field
The invention belongs to water treatment field, more specifically to a kind of drowned flow artificial wet land containing natural minerals and
Its methods and applications for handling glyphosate waste water.
Background technique
Artificial swamp is typical ecological purification method, is a kind of wet land system by manually building and regulating and controlling, passes through it
Physics, chemistry and the optimum organization of biological effect carry out sewage treatment in the ecosystem, and with sustainability, pollutant is gone
Except effect height, and can beautify the environment.
The principal mode of artificial swamp is surface current artificial wetland, underflow type artificial wet land, and surface current artificial wetland is easy
Mosquitos and flies and stench are generated, and the environment friendly of underflow type artificial wet land is more preferably, biological adsorption, biodegradation can be very
Good removal organic matter, and the sedimentation and suction-operated inside wetland can remove Phos.And it is natural good in artificial swamp
Oxygen and the alternate environment of anaerobism can effectively remove the inorganic nitrogen and small organic molecule generated after organic matter decomposes.
The minimizing technology of existing glyphosate includes biochemical treatment process, coagulant sedimentation and advanced oxidation processes etc..But
Coagulant sedimentation can generate a large amount of sludge, improve processing cost；The oxidant cost of advanced oxidation processes is high, reaction condition control
System is stringent；Although biochemical method can remove glyphosate, in its water outlet or contains a large amount of inorganic nitrogen phosphorus, need further
Subsequent processing.
104058516 A of Chinese patent application Publication No. CN, the applying date are the patent application text on May 30th, 2014
Part discloses a kind of processing method of phosphorus-containing wastewater generated in glyphosate production process, uses Ca-Ti ore type nanometer LaFeO3
Rare earth complex chemical compound applies to photocatalysis treatment glyphosate waste water containing phosphine, after first step photocatalysis treatment as catalyst
Waste water add flocculant flocculation treatment, the total phosphorus content by 2 steps treated waste water reaches 20mg/L hereinafter, the still invention
In catalyst synthesis cost it is high, and a large amount of sludge that coagulating treatment generates more improve processing cost, not very practical.
Chinese Patent Application No. is 201210502501.0, and the applying date is that the patent application document on November 30th, 2012 is public
A kind of artificial swamp using mineral processing low carbon-nitrogen ratio sewage is opened, which includes water inlet pipe, inhalant region, exhalant region and go out
Water pipe, water inlet pipe are connect with inhalant region；Outlet pipe is connect with exhalant region；It further include water distributing area, soil horizon and packing area, water inlet
Area, water distributing area, packing area and exhalant region are sequentially connected；Inhalant region is filled with lime stone；Inside packing area filled with pyrite and
Lime stone；The top of packing area is soil horizon.Above-mentioned patent is handled just for Phos, is not applied to organic nitrogen
The processing of phosphorus.
Chinese Patent Application No. is 201310695460.6, and the applying date is that the patent application document on December 17th, 2013 is public
The step of a kind of method opened natural magnetic iron ore biofilter and synchronized nitrate nitrogen and phosphorus in water removal using it, method
Are as follows: (1) bio-filter stuffing preparation and building；(2) starting of biofilter；(3) operation of biofilter；It utilizes sulphur certainly
Denitrifying bacterium is supported using magnetic iron ore as electron donor, is nitrogen by the reducing nitrate radical in water, goes nitrate nitrogen in water removal；Magnetic Huang iron and
Its oxidation product is by the modes dephosphorization such as absorption, chemical precipitation, to realize the nitrate nitrogen and phosphorus synchronized in water removal.Above-mentioned patent
It is handled just for Phos, is not applied to the processing of organic nitrogen phosphorus.
China is existing the patent handled using artificial swamp glyphosate pesticide wastewater also.
Summary of the invention
1. to solve the problems, such as
For existing glyphosate pesticide wastewater processing method (physical-chemical process) at high cost, not can be removed biodegrade
The inorganic nitrogen phosphorus generated afterwards, needs otherwise processed, increases subsequent treatment cost, and removal of the general artificial swamp for phosphorus
The problems such as effect is poor, can not reach the effect of advanced treating, it is wet that the present invention provides a kind of drowned flow artificial containing natural minerals
Ground and its methods and applications for handling glyphosate waste water.
2. technical solution
To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:
A kind of drowned flow artificial wet land of the waste water using natural minerals processing glyphosate containing organophosphorus pesticide, including water inlet
Area, packing area, soil area, exhalant region, the inhalant region, packing area and exhalant region are sequentially connected；Inside the packing area
Filled with magnetic iron ore and lime stone；The top of the packing area is soil horizon；The soil horizon is filled with clay.
Preferably, the clay filled inside the soil horizon, soil horizon with a thickness of 20cm.
Preferably, the ratio of the magnetic iron ore and lime stone filled inside the packing area is 1:1, magnetic iron ore and stone
The partial size of lime stone is 20-30mm, and the height of packing area is 0.6-0.7m.
Preferably, kind is implanted with water plant in the soil horizon, and the water plant is reed, and reed density is 3-
10 plants/m2。
Preferably, the packing area is equipped with water outlet close to the bottom of exhalant region.
Preferably, hydraulic detention time is 12-96 hours.
Preferably, from the denitrogenation sulphur screened in anaerobic activated sludge using the sulphur source progress autotrophic denitrification in magnetic iron ore
Bacillus is added to packing area as target strain.
The artificial swamp of the above-mentioned waste water using natural minerals processing glyphosate containing organophosphorus pesticide is in processing containing organic
Application in phosphorus pesticide glyphosate waste water, the steps include:, which will contain glyphosate waste water, is pumped into inhalant region, then flows through packing area progress
Processing, water outlet after processing are flowed out from exhalant region, and hydraulic detention time of the waste water in packing area is 12-96 hours.Glyphosate
Waste water glyphosate concentration in 50mg/L hereinafter, total phosphorus concentration in 5mg/L hereinafter, COD concentration in 100mg/L hereinafter, ammonia nitrogen is dense
Degree is in 15mg/L hereinafter, TN concentration is in 40mg/L or less.
Existing literature report in, traditional biological degradation of glyphosate it is ineffective, basic reason is glyphosate molecule
In phosphonate groups have certain toxic effect for microbial degradation glyphosate, be unfavorable for the biodegrade of glyphosate.This
Magnetic iron ore is utilized to the adsorption capacity of phosphonyl group in glyphosate molecule in the ground of innovation and creation, and phosphonate groups are hidden
In Surface of Pyrrhotite, and it is readily able to biodegradable primary amino group and carboxyl exposure, so that microorganism is easier to drop glyphosate
Solution is inorganic nitrogen phosphorus, thus sufficiently solves phosphonate groups to the negative effect of microbial degradation；And applicant is in reality
Find that the ability of troilite absorption glyphosate is better than high temperature in low temperature aging fruit by adsorption dynamics adsorption kinetics research during testing, in this way
Compensate for that temperature is lower when running in winter, the deficiency of the decline of glyphosate removal ability caused by microbial activity is insufficient；And
To spring and summer, the glyphosate for being adsorbed in troilite surface can ensure that people by the higher microbial degradation of activity in this way
The stabilization that work wetland removal glyphosate is run throughout the year.At the same time, magnetic iron ore artificial swamp has also combined magnetic iron ore to nothing
The coagulating treatment principle of machine phosphorus synchronizes the Phos for eliminating glyphosate and its degradation generation, realizes organic phosphorus and Phos
In the synchronous removal of the same processing unit, solves in existing glyphosate removal technique and need biodegrade+coagulating sedimentation two
The problem of grade technique, processing cost is saved, treatment process is simplified.
Although there is suction-operated of the literature research iron-stone to glyphosate at present, there is no correlative study show it is micro-
Whether biology can be by carboxyl and amino degradation of glyphosate, this is main innovation point of the invention.Final purpose of the invention is not
But independent degradation of glyphosate, it is also necessary to which synchronous degradation glyphosate metabolite inorganic nitrogen phosphorus and a part of COD, this is this field
What technical staff can not realize easily.Magnetic iron ore is used for artificial swamp and is also contemplated that whether plant is suitable for being grown in magnetic Huang
Iron ore is in the environment of filler.
Difficult point of the invention:
1. the present invention needs to fully understand the biodegradable process of glyphosate, it is thus understood that the phosphonate groups of glyphosate are to micro-
Biodegradable toxic side effect.
2. the present invention needs to fully understand magnetic iron ore for the adsorption mechanism of glyphosate, it is understood that magnetic iron ore is for grass
The sequestration of phosphate groups can effectively improve microorganism to the degradation effect of glyphosate in sweet phosphine molecule.
Above difficult point needs while understanding adsorption capacity of the magnetic iron ore to phosphate radical, the anti-nitre of troilite artificial swamp heterotrophism
Change ability, iron-stone dephosphorization ability and underflow type artificial wet land COD removal ability, therefore the technical program is not readily conceivable that.
1, according to experiment glyphosate adsorption experiment, glyphosate adsorption effect is preferable at low temperatures for discovery, this discovery
So that can all have preferable removal effect to glyphosate under the conditions of Different climate temperature using magnetic iron ore artificial swamp, specifically
Discussion is seen above, and having no document report magnetic iron ore absorption glyphosate before this is influenced situation by temperature etc..Artificial swamp fortune
Temperature is the restraining factors of its microbial degradation ability during row, and the present invention passes through absorption+biodegradable not well
Leading role with the period solves the problems, such as this.
2, in adsorption process, often there is competitive Adsorption phenomenon, but in research process of the invention, applicant
It is found surprisingly that in adsorption experiment process, the Phos generated after degradation can promote magnetic iron ore to glyphosate in adsorption process
Absorption, applicant carried out a large amount of research to this, and finally discovery is this is because ion exchange generates iron ion, iron ion water
Solution generates complex compound to caused by glyphosate also adsorption effect having the same.
3, glyphosate has certain inhibiting effect for microorganism, but magnetic Huang iron is utilized in the ground of the invention
Mine is hidden in Surface of Pyrrhotite by phosphonate groups to the adsorption capacity of phosphonyl group in glyphosate molecule, and is readily able to give birth to
Primary amino group and the carboxyl exposure that object is degraded thus sufficiently solve so that microorganism is easier glyphosate degradation to be inorganic nitrogen phosphorus
Negative effect of the phosphonate groups of having determined to microbial degradation.
4, magnetic iron ore, which is oxidized easily to be discharged, can have certain coloration, by mixing lime stone with magnetic iron ore
As filler, the hydrolysis of coloured ferric ion can be accelerated between 6~9 by adjusting water body pH, so that water outlet ferric ion
Content minimizes, to reduce effluent color dilution.
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) packing area of the invention is filled with magnetic iron ore and lime stone, and magnetic iron ore is as the useless of many minings
Barrow stone is easy to produce acidic mine waste water, and the present invention recycles discarded natural crystal, plays resource reclaim and keeps away
The effect of exempting from pollution；
(2) magnetic iron ore Performance of Constructed Wetlands Substrates magnetic iron ore of the invention has certain adsorption effect for glyphosate,
After glyphosate is adsorbed, it can be broken down into inorganic nitrogen phosphorus by the biological chemistry action of artificial swamp, and magnetic iron ore
Iron ion in artificial swamp can be used as good dephosphorizing coagulant for inorganic phosphorus ligands, and magnetic iron ore itself is for nothing
Machine phosphorus has certain adsorption effect, therefore has the function of organic phosphorus and Phos in synchronous removal waste water, has simplified processing
Technique and processing cost is saved；
(3) magnetic iron ore artificial swamp of the invention is while removing glyphosate, can also in waste water nitrate nitrogen,
The pollutants such as ammonia nitrogen, COD are removed, this is because part denitrifying bacteria can using the sulphur in magnetic iron ore as sulphur source,
It carries out autotrophic denitrification and removes nitrate nitrogen, and the well feeding region near root system can provide the place of ammonium oxidation, remove simultaneously
Ammonia nitrogen and nitrate nitrogen, and the anaerobic biological decomposition that COD can be attached to aerobic microbiological and wetland lower part near root system is gone
It removes；
(4) plant that the present invention plants is reed, has good tolerance to organophosphorus pesticide, suitable for there is grass sweet
It is grown in the environment of phosphine herbicide, and reed has certain absorption for inorganic nitrogen phosphorus, has for ammonia nitrogen higher
Tolerance, these speciality make it possible to the effect of promotion magnetic iron ore-lime stone artificial swamp removal glyphosate；
(5) gravel filling that the present invention is laid in inhalant region, can effectively stop the bulky grain suspended matter in waste water, reduce
The problem of artificial swamp is blocked because of biggish suspended particulate；
(6) present invention successfully solves inhibiting effect of the phosphonate groups to microorganism of glyphosate, improves microorganism
Handle the efficiency of glyphosate；
(7) method for usually utilizing troilite processing Phos in the prior art is made using the iron ion of troilite release
For coagulant, the effect of local coagulating sedimentation is formed in artificial swamp or biofilter, thus by inorganic phosphorus ligands；And this
Invention is to recycle the microorganism in artificial swamp by glyphosate using the phosphonyl group in magnetic iron ore absorption glyphosate molecule
Unadsorbed primary amino group is degraded with carboxyl in molecule, ultimately generates Phos, and principle between the two is different；
(8) original microorganism, the nature in artificial swamp natural environment of the microorganism in the present invention in packing layer
In glyphosate degradation can be tamed and dociled by being constantly passed through the waste water containing glyphosate into artificial swamp there are many microorganism
Change, the domestication time is three months.
Detailed description of the invention
Fig. 1 is the removal effect figure of glyphosate of the present invention；
Fig. 2 is the removal effect figure of total phosphorus in the present invention.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Embodiment 1
It is a kind of to handle the artificial swamp containing organophosphorus pesticide glyphosate waste water using natural minerals, including inhalant region, fill out
Material area, soil horizon and exhalant region, inhalant region, packing area and exhalant region are sequentially connected.Inside packing area filled with magnetic iron ore and
Lime stone；The top of packing area is soil horizon；Soil horizon is filled with clay, and packing area is equipped with water outlet close to the bottom of exhalant region
Mouthful.
Artificial swamp width 1m, overall length 5.7m, high 1.5m, wherein filler section length is 3.3m.It is whole to be formed using brick,
Bottom uses concrete bed, and wall and bottom all use waterproof material and coating, prevent wetland leak.Packing area filler uses
Natural magnetic iron ore and lime stone mixing, ratio is about 1:1.Magnetic iron ore and limestone particle size are between 20-30mm, filler
Area's packing course height is 0.7m；Clay and gravel mixed zone are with a thickness of 0.2cm；Height of water level is 0.7m in wetland；It is planted in soil horizon 4
It is implanted with water plant reed, planting density is 10 plants/m2。
Waste water is pumped into wetland inhalant region, Pollutants in Wastewater concentration is 25~30mg/L of glyphosate or so, total phosphorus concentration
It is 20mg/L or so for 5mg/L or so, total nitrogen concentration, ammonia nitrogen is in 15mg/L or less, COD in 80mg/L or less.Waste water is in wetland
In hydraulic detention time be for 24 hours, continuous operation 10 months.The removal effect of its glyphosate and total phosphorus such as attached drawing 1, attached drawing 2,
Remaining pollutant, TN, ammonia nitrogen, nitrate nitrogen, COD removal effect such as table 1.
Artificial swamp whole year all has preferable removal effect for glyphosate, and the removal rate of glyphosate and total phosphorus is ok
Reach 85% or more, wherein winter average removal rate is also 82% or so.0.5mg/L, part-time can be lower than by being discharged total phosphorus
The aqueous concentration of interior total phosphorus is lower than 0.3mg/L.Total phosphorus contains other phosphorus in the total phosphorus and water body of glyphosate offer, water outlet
Glyphosate mean concentration is 2.5mg/L.At the same time, the nitrate nitrogen in artificial swamp, ammonia nitrogen and COD have been obtained to a certain degree
Removal, specific removal effect is shown in Table 1.
1 artificial swamp of table is simultaneously to other pollutants removal rate effects
Embodiment 2
With embodiment 1, the difference is that: the height of packing area is 0.6m, and reed density is 3 plants/m2, the hydraulic retention of use
Time is 60 hours.The hydraulic detention time for changing artificial swamp, samples, rear continuous sampling one month after a week in stable operation
Carry out glyphosate and total phosphorus yield.
According to experimental result, artificial swamp is not decreased obviously glyphosate removal rate and total tp removal rate, winter grass
Sweet phosphine removal rate can reach 85% or more, and summer glyphosate removal rate reaches 95% or more, and water outlet glyphosate concentration is stablized in 2-
5mg/L, water outlet total phosphorus concentration are stablized in 0.5mg/L or less.Magnetic iron ore artificial swamp is for other pollution factor removal effects
As shown in table 2.
2 artificial swamp of table is simultaneously to other pollutants removal rate effects
High-strength glyphosate does not have an impact thiobacillus denitrificans degradation of glyphosate.
Embodiment 3
With embodiment 1, the difference is that the hydraulic detention time used is 40 hour, handled is the river containing glyphosate
Water.River water is pumped into water tank by immersible pump, sewage is passed through by artificial swamp by peristaltic pump.The water inlet glyphosate of river water
Concentration is 20mg/L or so, and total phosphorus 3-5mg/L, total nitrogen concentration is 20mg/L or so.The artificial swamp residence time is 40 hours,
Its removal effect of stable latter continuous one week sampling and measuring, different pollutant removals such as table 3.
Removal effect of 3 artificial wetland treatment of table by glyphosate polluted river water
Magnetic iron ore artificial swamp in river water glyphosate and inorganic nitrogen phosphorus have a preferable removal effect, and with
The change of temperature, artificial swamp 80% or more can be maintained for the removal rate of glyphosate, total phosphorus.Simultaneously, manually
The removal rate of wetland total nitrogen can also maintain 59.7%, and the variation of glyphosate concentration is not to the anti-nitre of microorganism in artificial swamp
Change effect.
Claims (5)
1. a kind of method for handling the glyphosate waste water containing organophosphorus pesticide, which is characterized in that use the undercurrent containing natural minerals
Artificial swamp, the drowned flow artificial wet land are made of inhalant region, soil horizon, packing area and exhalant region, and the inhalant region is filled out
Material area and exhalant region are sequentially connected；Magnetic iron ore and lime stone, filling proportion 1:1, magnetic are filled with inside the packing area
The partial size of pyrite and lime stone is 20-30mm, and the height of packing area is 0.6-0.7m；The top of the packing area is soil
Layer；The soil horizon is filled with clay；Processing step are as follows: glyphosate waste water will be contained and be pumped into inhalant region, then flow through packing area
It is handled, water outlet after processing is flowed out from exhalant region, and hydraulic detention time of the waste water in packing area is 12-96 hours.
2. a kind of method for handling the glyphosate waste water containing organophosphorus pesticide according to claim 1, it is characterised in that: institute
State soil horizon filling clay, soil horizon with a thickness of 20cm；Kind is implanted with water plant in soil horizon, and the water plant is
Reed, reed density are 3-10 plants/m2。
3. a kind of method for handling the glyphosate waste water containing organophosphorus pesticide according to claim 1, it is characterised in that: grass is sweet
Phosphine waste water glyphosate concentration in 50mg/L hereinafter, total phosphorus concentration in 5mg/L hereinafter, COD concentration in 100mg/L hereinafter, ammonia nitrogen
Concentration is in 15mg/L hereinafter, TN concentration is in 40mg/L or less.
4. a kind of method for handling the glyphosate waste water containing organophosphorus pesticide according to claim 1 or 3, it is characterised in that:
The pH value of glyphosate waste water is adjusted between 6~9 in processing.
5. a kind of method for handling the glyphosate waste water containing organophosphorus pesticide according to claim 3, it is characterised in that: from detesting
It screens in oxygen activity sludge and is added using the thiobacillus denitrificans that the sulphur source in magnetic iron ore carries out autotrophic denitrification as target strain
It is added to packing area.
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| CN107884375B (en) * | 2017-11-10 | 2020-10-16 | 华南师范大学 | Method and kit for detecting ferric ions |
| CN108862574A (en) * | 2018-06-22 | 2018-11-23 | 河海大学 | Denitrifying artificial wet land system and its sewage denitrification method are cooperateed with based on reduction-state Fe autotrophy/sawdust heterotrophism |
| CN112279377A (en) * | 2020-09-30 | 2021-01-29 | 国河环境研究院(南京)有限公司 | Preparation method of wetland filler for purifying black and odorous water body and water purifying device using filler |
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| CN102923861A (en) * | 2012-11-30 | 2013-02-13 | 南京大学 | Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores |
| CN103626293A (en) * | 2013-12-17 | 2014-03-12 | 南京大学 | Natural pyrrhotite biological filter and method for synchronously removing nitrate nitrogen and phosphorus out of water by using natural pyrrhotite biological filter |
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| CN102923861A (en) * | 2012-11-30 | 2013-02-13 | 南京大学 | Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores |
| CN103626293A (en) * | 2013-12-17 | 2014-03-12 | 南京大学 | Natural pyrrhotite biological filter and method for synchronously removing nitrate nitrogen and phosphorus out of water by using natural pyrrhotite biological filter |
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