CN110194569A - A kind of processing method of high-concentration ammonia nitrogenous wastewater - Google Patents
A kind of processing method of high-concentration ammonia nitrogenous wastewater Download PDFInfo
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
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- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C02F3/00—Biological treatment of water, waste water, or sewage
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Abstract
The invention proposes a kind of processing methods of high-concentration ammonia nitrogenous wastewater, comprising the following steps: S1. filtering；S2. salinization；S3. it cleans；S4. biological denitrificaion；S5. it precipitates.The present invention is cleaned after using current HCl salt with NaOH, different from traditional current NaOH removing metal impurities, using the method for the present invention not only it is possible to prevente effectively from generating NH after NaOH is added3Loss is polluted into air, and can respectively obtain the higher NH of purity4Cl and metal hydroxide solids are respectively used to agrochemical and Refining metal, are difficult to separate after avoiding it from mixing and waste caused by discarding.
Description
Technical field
The present invention relates to technical field of sewage, and in particular to a kind of processing method of high-concentration ammonia nitrogenous wastewater.
Background technique
Nitrate pollution is to cause the one of the major reasons of water eutrophication, and nitrogenous compound is to maintenance water body in control water
It cleans and prevents water eutrophication from playing a significant role, cause extensive attention and research in recent years.Petroleum, chemical industry and
The outlet nitrogenous effluent of the industries such as chemical fertilizer, if leather waste water has the characteristics that pollutant concentration is high, complex in composition, discharge amount is big,
Qualified discharge difficulty is big；Especially these waste water have the characteristics that (salt content is greater than 15g/L) with high salt mostly, cause sewage can
Biochemical is poor, brings larger difficulty to improvement, causes sizable pressure to environment.
Mainly there are physical method, chemical method, biological method etc. for the processing method of high concentration high ammonia-nitrogen wastewater at present,
But due to physics, chemical method operating cost is higher, treatment effect is undesirable while easily causing secondary pollution and being difficult in reality
It is promoted in；Traditional biological method has when handling low ammonia nitrogen waste water and has great advantage, but when chance ammonia nitrogen in waste water excessive concentration, meeting
The metabolism for inhibiting microorganism, so that microorganism be made to lose degradation capability.And it is previous in sewage treatment since condition limits
As not will do it desalting processing, therefore in practical applications, screening salt tolerant high-effective microorganism provides life for the degradation of ammonia nitrogen
Change the feasibility of degradation.
China Patent Publication No. is that 101239751 A of CN discloses a kind of processing method of high-concentration ammonia nitrogenous wastewater,
Using intermittent activated sludge process, method by the way that culture solution ammonia nitrogen concentration is gradually increased, the enrichment culture nitre from activated sludge
Change bacterium, can remove ammonia nitrogen in high density (being greater than 500mg/L), but the nitrobacteria being enriched with, hypersaline environment can not be resistant to, it is right
In high ammonia-nitrogen wastewater with high salt, such as leather waste water, treatment effect is poor.
101195507 A of Chinese patent CN discloses a kind of method of ammonia nitrogen waste water processing, including carrier, nitrifier,
Aerobic zone, anoxic zone and the anoxic zone formed using the oxygen concentration gradient that diffusional resistance generates inside particle, in carrier inside
The environment for being suitble to two processes of nitrification and denitrification to organically combine is formed, ammonia is carried out due to the presence of oxygen on granule sludge surface layer
Oxidation reaction, inside particle because using the oxidation product progress anti-nitration reaction of ammonia under anoxia condition, to realize single-stage
Biological denitrificaion realizes Simultaneous Nitrification and denitrification, has reached very high denitrification percent.But the nitrobacteria being enriched with, Wu Fanai
By hypersaline environment, for high ammonia-nitrogen wastewater with high salt, such as leather waste water, treatment effect is poor.
101987767 A of Chinese patent CN discloses the UF membrane and stripping group of a kind of high ammonia nitrogen and salinity RE waste water
Close processing method, method and step are as follows: by disc filter to primary filtration processing is carried out after Wastewater Pretreatment, into stripping
Device, after the ammonia for recycling removing, into membrane separation device, wherein producing water reuse, concentrate returns to back stripping device and returns
After the ammonia for receiving removing, UF membrane step is turned again to.Such technological advantage is: effluent quality well can direct reuse, but
Required cost is too high, and service life is short, and manual operation is difficult.
The 2nd phase of volume 26 " environmental project " in April, 2008, Yu Deshuan, Zhang Yong et al. deliver " high salinity waste water
Sludge acclimatization and microbial research " it in influent COD is 800~1000mg/L, 80~100mg/L of ammonia nitrogen in a text, contain
Under conditions of salt amount 17.5g/L, domestication cultivated can effectively degradation of ammonia nitrogen activated sludge.But due to COD high, heterotroph
Competitive assays are formed to the nitrobacteria of autotrophy, nitrobacteria cultivation cycle is long, and proportion is low in activated sludge.Together
When, the nitrobacteria cultivated can not effectively remove the waste water of high ammonia nitrogen.
" environmental project journal " in March, 2010 the 3rd phase of Volume Four, Zhao Kaifeng, Wang Shuying etc. deliver " NaCl salt
Spend influence to salt tolerant activated sludge settling property and denitrogenation " salt resistance ability of nitrifier is studied in a text, work as salt
When degree is within the scope of 20 g/L, ammonia nitrogen removal frank can still maintain 99% or more, show that the salt resistance ability of nitrifier is strong,
But selected ammonia nitrogen concentration controls within the scope of 65 mg/L in its research, not further for high-concentration ammonia nitrogenous wastewater
Research.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of processing method of high-concentration ammonia nitrogenous wastewater, purpose
It is, a kind of tuckahoe facial mask is provided, it is simple by obtaining a kind of processing, energy consumption is reduced, value-added product height, ammonia nitrogen removal are obtained
Rate is high, the high processing method of elimination capacity.
The present invention provides a kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, obtain no particle waste water, the ammonia nitrogen value of the waste water is 20000-
25000mg/L；
S2. salinization: will be heated to 70 DEG C -80 DEG C without particle waste water in step S1, and hydrochloric acid is added by a certain percentage, and stirring is anti-
It answers, is down to room temperature, ammonia chloride crystal, filtering is precipitated, solid is continued to employ, and can be used as agricultural fertilizer, and filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 70 DEG C -80 DEG C, NaOH is added and adjusts pH to 7.8-
8.5, a large amount of precipitatings are generated, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, and chlorine is precipitated
Change sodium crystal, filtering, solid is continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, passes through regulation nitrifier, realizes nitrifying process control
System in Nitrification Stage, it is contemplated that nitrite nitrogen accumulation rate be 80% or so, by Short-Cut Nitrification Process water outlet with purified in step S3 it is dense
Ammonia nitrogen waste water mixing is spent, water distribution ratio in the light of actual conditions determines, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that into
Water nitrite nitrogen is 550mg/L, and ammonia nitrogen 450mg/L adds methanol after Anammox processing water outlet, into denitrification work
Skill obtains denitrification water outlet, and the ammonia nitrogen value of the denitrification water outlet is 100-150mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 9-11, is proportionally added into Mg (OH)2And H3PO4, produce
Raw MgNH4PO4·6H2O precipitating, filtering, solid are continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, to filter
Hydrogen peroxide is added in liquid, is heated to 70 DEG C -80 DEG C, stirring is cooled to room temperature, filters, solid is continued to employ, can be made up to not generating bubble
For industrial crude salt, filtrate can be discharged, and ammonia-nitrogen content is lower than 1mg/ in the filtrate.
As further improvement of the invention, sieve described in step S1 is 100 mesh or 150 mesh screens.
As further improvement of the invention, the concentration of hydrochloric acid described in step S2 is 40-50g/L, the volume with waste water
Than for 1:1.2.
As further improvement of the invention, the method that nitrifier is regulated and controled described in step S4 is control pH in 8-8.4, temperature
Degree is 35 DEG C or so, and DO concentration is 2-3mg/L, and sludge age is greater than 5 days.
As further improvement of the invention, the additive amount of methanol described in step S4 is 300g/m3。
As further improvement of the invention, Mg described in step S5 (OH)2And H3PO4The mass ratio of the material value be 1:1.
As further improvement of the invention, the water outlet of denitrification described in step S5 and Mg (OH)2And H3PO4Ratio be
1L:(580-870)mg: (980-1470)mg。
As further improvement of the invention, the ratio of filtrate described in step S5 and hydrogen peroxide is 1L:(80-120) mg.
As further improvement of the invention, the speed of agitator is 500-700r/min.
The invention has the following beneficial effects:
1. the present invention is cleaned after using current HCl salt with NaOH, different from traditional current NaOH removing metal impurities, adopt
With the method for the present invention not only it is possible to prevente effectively from generating NH after NaOH is added3Loss is polluted into air, and can be divided
The higher NH of purity is not obtained4Cl and metal hydroxide solids are respectively used to agrochemical and Refining metal, avoid it
Waste caused by separating and discarding is difficult to after mixing；
2. the present invention reduces the principle for going out precipitating unfortunately by solubility, industrial crude salt, agricultural fertilizer ammonium chloride are obtained, and adopt
Guanite (MgNH is obtained with the precipitation method4PO4·6H2O it) precipitates, can be used as agricultural fertilizer, turn waste into wealth, improve high strength ammonia
The added value of nitrogen waste water；
3. Anammox carries out under anoxic conditions in biological denitrification process of the present invention, aerator oxygen supply is not needed, it can be with
The consumption of energy is reduced, Anammox is with CO2As carbon source, does not need to provide additional carbon, reduce the consumption to carbon source, produce
Mud amount is low, reduces surplus sludge volume, and sludge treatment expense is low, and elimination capacity is high, and maximum nitrogen load is up to 9.5kg/(m3D)；
4. the method for the present invention processing is simple, energy consumption is reduced, obtains value-added product height, ammonia nitrogen removal frank is high, and elimination capacity is high,
Have wide practical use.
Detailed description of the invention
Fig. 1 is test result contrast table.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, the embodiment described is the embodiment of part of representative of the invention, rather than whole embodiments, this field are general
Other all embodiments obtained belong to protection of the invention to logical technical staff without making creative work
Range.
Embodiment 1
A kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, the sieve is 100 mesh screens, obtains no particle waste water, described useless
The ammonia nitrogen value of water is 20000mg/L；
S2. salinization: will be heated to 70 DEG C without particle waste water in step S1, and hydrochloric acid is added for 1:1.2 by volume, hydrochloric acid
Concentration is 40g/L, is stirred to react, speed of agitator 500r/min, is down to room temperature, and ammonia chloride crystal, filtering is precipitated, and solid stays
With can be used as agricultural fertilizer, filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 70 DEG C -80 DEG C, NaOH is added and adjusts pH to 7.8, produces
Raw a large amount of precipitatings, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, and precipitated sodium chloride is brilliant
Body, filtering, solid are continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, by regulating and controlling nitrifier, regulates and controls the side of nitrifier
Method is control pH 8, and temperature is 35 DEG C or so, and DO concentration is 2mg/L, and sludge age is greater than 5 days, realizes nitrifying process control in nitrous
The change stage, it is contemplated that nitrite nitrogen accumulation rate is 80% or so, and Short-Cut Nitrification Process is discharged and is given up with the concentration ammonia nitrogen purified in step S3
Water mixing, water distribution ratio in the light of actual conditions determine, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that water inlet nitrous state
Nitrogen is 550mg/L, ammonia nitrogen 450mg/L, and methanol is added after Anammox processing water outlet, and the additive amount of methanol is 300g/m3,
Into denitrification process, denitrification water outlet is obtained, the ammonia nitrogen value of the denitrification water outlet is 100mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 9, is proportionally added into Mg (OH)2And H3PO4, described anti-
Nitrified effluent and Mg (OH)2And H3PO4Ratio be 1L:580mg:980mg, generate MgNH4PO4·6H2O precipitating, filtering, solid
Continue to employ, can be used as agricultural fertilizer, the ammonia nitrogen value in filtrate is 30mg/L, and hydrogen peroxide, the ratio of filtrate and hydrogen peroxide is added to filtrate
Value is 1L:8mg, is heated to 70 DEG C, stirring is cooled to room temperature, filters, solid is continued to employ, and can be used as industry up to not generating bubble
Crude salt, filtrate can discharge, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
Embodiment 2
A kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, the sieve is 100 mesh or 150 mesh screens, and it is useless to obtain no particle
Water, the ammonia nitrogen value of the waste water are 25000mg/L；
S2. salinization: will be heated to 80 DEG C without particle waste water in step S1, and hydrochloric acid is added for 1:1.2 by volume, hydrochloric acid
Concentration is 40-50g/L, is stirred to react, speed of agitator 700r/min, is down to room temperature, and ammonia chloride crystal, filtering, solid is precipitated
Continue to employ, can be used as agricultural fertilizer, filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 80 DEG C, NaOH is added and adjusts pH to 8.5, generate big
Amount precipitating, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, precipitated sodium chloride crystal,
Filtering, solid are continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, by regulating and controlling nitrifier, regulates and controls the side of nitrifier
Method is control pH 8.4, and temperature is 35 DEG C or so, and DO concentration is 3mg/L, and sludge age is greater than 5 days, realizes nitrifying process control in Asia
The nitrification stage, it is contemplated that nitrite nitrogen accumulation rate is 80% or so, the concentration ammonia nitrogen that will be purified in Short-Cut Nitrification Process water outlet and step S3
Waste water mixing, water distribution ratio in the light of actual conditions determine, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that water inlet nitrous
State nitrogen is 550mg/L, ammonia nitrogen 450mg/L, and methanol is added after Anammox processing water outlet, and the additive amount of methanol is 300g/
m3, into denitrification process, denitrification water outlet is obtained, the ammonia nitrogen value of the denitrification water outlet is 150mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 9.8, is proportionally added into Mg (OH)2And H3PO4, described
Denitrification water outlet and Mg (OH)2And H3PO4Ratio be 1L:870mg:1470mg, generate MgNH4PO4·6H2O precipitating, filtering,
Solid is continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, and hydrogen peroxide, filtrate and hydrogen peroxide is added to filtrate
Ratio be 1L:120mg, be heated to 80 DEG C, stirring is cooled to room temperature, is filtered, solid is continued to employ, can be made until do not generate bubble
For industrial crude salt, filtrate can be discharged, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
Embodiment 3
A kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, the sieve is 150 mesh screens, obtains no particle waste water, described useless
The ammonia nitrogen value of water is 22000mg/L；
S2. salinization: will be heated to 72 DEG C without particle waste water in step S1, and hydrochloric acid is added for 1:1.2 by volume, hydrochloric acid
Concentration is 42g/L, is stirred to react, speed of agitator 550r/min, is down to room temperature, and ammonia chloride crystal, filtering is precipitated, and solid stays
With can be used as agricultural fertilizer, filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 72 DEG C, NaOH is added and adjusts pH to 7.8-8.5, produces
Raw a large amount of precipitatings, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, and precipitated sodium chloride is brilliant
Body, filtering, solid are continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, by regulating and controlling nitrifier, regulates and controls the side of nitrifier
Method is control pH 8.1, and temperature is 35 DEG C or so, and DO concentration is 2.5mg/L, and sludge age is greater than 5 days, realizes that nitrifying process control exists
Nitrification Stage, it is contemplated that nitrite nitrogen accumulation rate is 80% or so, the concentration ammonia that will be purified in Short-Cut Nitrification Process water outlet and step S3
The mixing of nitrogen waste water, water distribution ratio in the light of actual conditions determine, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that water inlet is sub-
Nitrate nitrogen is 550mg/L, and ammonia nitrogen 450mg/L adds methanol after Anammox processing water outlet, and the additive amount of methanol is
300g/m3, into denitrification process, denitrification water outlet is obtained, the ammonia nitrogen value of the denitrification water outlet is 110mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 9.5, is proportionally added into Mg (OH)2And H3PO4, described
Denitrification water outlet and Mg (OH)2And H3PO4Ratio be 1L:638mg:1078mg, generate MgNH4PO4·6H2O precipitating, filtering,
Solid is continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, and hydrogen peroxide, filtrate and hydrogen peroxide is added to filtrate
Ratio be 1L:90mg, be heated to 72 DEG C, stirring is cooled to room temperature, is filtered, solid is continued to employ, be can be used as until do not generate bubble
Industrial crude salt, filtrate can discharge, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
Embodiment 4
A kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, the sieve is 100 mesh screens, obtains no particle waste water, described useless
The ammonia nitrogen value of water is 24000mg/L；
S2. salinization: will be heated to 78 DEG C without particle waste water in step S1, and hydrochloric acid is added for 1:1.2 by volume, hydrochloric acid
Concentration is 48g/L, is stirred to react, speed of agitator 650r/min, is down to room temperature, and ammonia chloride crystal, filtering is precipitated, and solid stays
With can be used as agricultural fertilizer, filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 78 DEG C, NaOH is added and adjusts pH to 8.2, generate big
Amount precipitating, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, precipitated sodium chloride crystal,
Filtering, solid are continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, by regulating and controlling nitrifier, regulates and controls the side of nitrifier
Method is control pH 8.3, and temperature is 35 DEG C or so, and DO concentration is 2.7mg/L, and sludge age is greater than 5 days, realizes that nitrifying process control exists
Nitrification Stage, it is contemplated that nitrite nitrogen accumulation rate is 80% or so, the concentration ammonia that will be purified in Short-Cut Nitrification Process water outlet and step S3
The mixing of nitrogen waste water, water distribution ratio in the light of actual conditions determine, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that water inlet is sub-
Nitrate nitrogen is 550mg/L, and ammonia nitrogen 450mg/L adds methanol after Anammox processing water outlet, and the additive amount of methanol is
300g/m3, into denitrification process, denitrification water outlet is obtained, the ammonia nitrogen value of the denitrification water outlet is 140mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 10.5, is proportionally added into Mg (OH)2And H3PO4, institute
State denitrification water outlet and Mg (OH)2And H3PO4Ratio be 1L:812mg:1372mg, generate MgNH4PO4·6H2O precipitating, mistake
Filter, solid are continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, and hydrogen peroxide, filtrate and dioxygen is added to filtrate
The ratio of water is 1L:110mg, is heated to 78 DEG C, stirring is cooled to room temperature, filters, solid is continued to employ, can up to not generating bubble
As industrial crude salt, filtrate can be discharged, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
Embodiment 5
A kind of processing method of high-concentration ammonia nitrogenous wastewater, comprising the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, the sieve is 150 mesh screens, obtains no particle waste water, described useless
The ammonia nitrogen value of water is 22500mg/L；
S2. salinization: will be heated to 75 DEG C without particle waste water in step S1, and hydrochloric acid is added for 1:1.2 by volume, hydrochloric acid
Concentration is 45g/L, is stirred to react, speed of agitator 600r/min, is down to room temperature, and ammonia chloride crystal, filtering is precipitated, and solid stays
With can be used as agricultural fertilizer, filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 75 DEG C, NaOH is added and adjusts pH to 8.0, generate big
Amount precipitating, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, precipitated sodium chloride crystal,
Filtering, solid are continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, by regulating and controlling nitrifier, regulates and controls the side of nitrifier
Method is control pH 8.2, and temperature is 35 DEG C or so, and DO concentration is 2.2mg/L, and sludge age is greater than 5 days, realizes that nitrifying process control exists
Nitrification Stage, it is contemplated that nitrite nitrogen accumulation rate is 80% or so, the concentration ammonia that will be purified in Short-Cut Nitrification Process water outlet and step S3
The mixing of nitrogen waste water, water distribution ratio in the light of actual conditions determine, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that water inlet is sub-
Nitrate nitrogen is 550mg/L, and ammonia nitrogen 450mg/L adds methanol after Anammox processing water outlet, and the additive amount of methanol is
300g/m3, into denitrification process, denitrification water outlet is obtained, the ammonia nitrogen value of the denitrification water outlet is 125mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 10, is proportionally added into Mg (OH)2And H3PO4, described
Denitrification water outlet and Mg (OH)2And H3PO4Ratio be 1L:754mg:1274mg, generate MgNH4PO4·6H2O precipitating, filtering,
Solid is continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, and hydrogen peroxide, filtrate and hydrogen peroxide is added to filtrate
Ratio be 1L:100mg, be heated to 75 DEG C, stirring is cooled to room temperature, is filtered, solid is continued to employ, can be made until do not generate bubble
For industrial crude salt, filtrate can be discharged, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
Comparative example 1
Compared with Example 5, step S4 is saved.
Test case 1
It will be tested using water after embodiment 1-5 and the raw water and processing of the processing of comparative example 1 and commonsense method, as a result see figure
1。
As shown in Figure 1,1-5 of embodiment of the present invention the method all has fabulous compared with comparative example 1 and commonsense method
Ammonia nitrogen removal frank (99.99%), COD removal rate is higher (be greater than 98%), salinity decrease (61-72%).By with comparative example
1 compares, it is seen that biological denitrificaion can further purify sewage, remove the pollutant component in sewage.
Compared with prior art, the present invention is removed using being cleaned after current HCl salt with NaOH with traditional current NaOH
Metal impurities are different, using the method for the present invention not only it is possible to prevente effectively from generating NH after NaOH is added3Loss is caused into air
Pollution, and the higher NH of purity can be respectively obtained4Cl and metal hydroxide solids, are respectively used to agrochemical and refining
It purifies metals, is difficult to separate after avoiding it from mixing and waste caused by discarding；
The present invention reduces the principle for going out precipitating unfortunately by solubility, obtains industrial crude salt, agricultural fertilizer ammonium chloride, and using heavy
Shallow lake method obtains guanite (MgNH4PO4·6H2O it) precipitates, can be used as agricultural fertilizer, turn waste into wealth, it is useless to improve ammonia nitrogen in high density
The added value of water；
Anammox carries out under anoxic conditions in biological denitrification process of the present invention, does not need aerator oxygen supply, can subtract
The consumption of few energy, Anammox is with CO2As carbon source, does not need to provide additional carbon, reduce the consumption to carbon source, produce mud
It measures low, reduces surplus sludge volume, sludge treatment expense is low, and elimination capacity is high, and maximum nitrogen load is up to 9.5kg/(m3D)；
The method of the present invention processing is simple, reduces energy consumption, obtains value-added product height, and ammonia nitrogen removal frank is high, and elimination capacity is high, has wide
General application prospect.
Those skilled in the art is not under conditions of departing from the spirit and scope of the present invention that claims determine, also
Various modifications can be carried out to the above content.Therefore the scope of the present invention is not limited in above explanation, but by
The range of claims determines.
Claims (9)
1. a kind of processing method of high-concentration ammonia nitrogenous wastewater, which comprises the following steps:
S1. it filters: high-concentration ammonia nitrogenous wastewater is crossed into sieve, obtain no particle waste water, the ammonia nitrogen value of the waste water is 20000-
25000mg/L；
S2. salinization: will be heated to 70 DEG C -80 DEG C without particle waste water in step S1, and hydrochloric acid is added by a certain percentage, and stirring is anti-
It answers, is down to room temperature, ammonia chloride crystal, filtering is precipitated, solid is continued to employ, and can be used as agricultural fertilizer, and filtrate is middle concentration ammonia nitrogen wastewater；
S3. it cleans: the middle concentration ammonia nitrogen wastewater in step S2 is heated to 70 DEG C -80 DEG C, NaOH is added and adjusts pH to 7.8-
8.5, a large amount of precipitatings are generated, filtering, solid is metal hydroxides, can refine proposition metal, and waste water is cooled to room temperature, and chlorine is precipitated
Change sodium crystal, filtering, solid is continued to employ, and can be used as industrial crude salt, and filtrate is the concentration ammonia nitrogen wastewater of purification；
S4. biological denitrificaion: being filled with oxygen into the concentration ammonia nitrogen wastewater of purification, passes through regulation nitrifier, realizes nitrifying process control
System in Nitrification Stage, it is contemplated that nitrite nitrogen accumulation rate be 80% or so, by Short-Cut Nitrification Process water outlet with purified in step S3 it is dense
Ammonia nitrogen waste water mixing is spent, water distribution ratio in the light of actual conditions determines, after intermediate pool mixing, into anaerobic ammonia oxidation process, it is contemplated that into
Water nitrite nitrogen is 550mg/L, and ammonia nitrogen 450mg/L adds methanol after Anammox processing water outlet, into denitrification work
Skill obtains denitrification water outlet, and the ammonia nitrogen value of the denitrification water outlet is 100-150mg/L；
S5. precipitate: the pH value of the denitrification water outlet in regulating step S4 is 9-11, is proportionally added into Mg (OH)2And H3PO4, produce
Raw MgNH4PO4·6H2O precipitating, filtering, solid are continued to employ, and can be used as agricultural fertilizer, and the ammonia nitrogen value in filtrate is 30mg/L, to filter
Hydrogen peroxide is added in liquid, is heated to 70 DEG C -80 DEG C, stirring is cooled to room temperature, filters, solid is continued to employ, can be made up to not generating bubble
For industrial crude salt, filtrate can be discharged, and ammonia-nitrogen content is lower than 1mg/L in the filtrate.
2. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that sieved described in step S1
Net is 100 mesh or 150 mesh screens.
3. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that salt described in step S2
The concentration of acid is 40-50g/L, and the volume ratio with waste water is 1:1.2.
4. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that adjusted described in step S4
The method for controlling nitrifier is control pH in 8-8.4, and temperature is 35 DEG C or so, and DO concentration is 2-3mg/L, and sludge age is greater than 5 days.
5. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that first described in step S4
The additive amount of alcohol is 300g/m3。
6. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that Mg described in step S5
(OH)2And H3PO4The mass ratio of the material value be 1:1.
7. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that anti-described in step S5
Nitrified effluent and Mg (OH)2And H3PO4Ratio be 1L:(500-550) mg:(850-900) mg.
8. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that filtered described in step S5
The ratio of liquid and hydrogen peroxide is 1L:(80-120) mg.
9. a kind of processing method of high-concentration ammonia nitrogenous wastewater according to claim 1, which is characterized in that the speed of agitator is
500-700r/min。
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| CN104649515A (en) * | 2015-01-16 | 2015-05-27 | 北京交通大学 | Treatment process method and device for high-salinity and high-ammonia-nitrogen rare-earth production wastewater |
| CN108658374A (en) * | 2018-05-18 | 2018-10-16 | 宜昌金信化工有限公司 | A kind of cleaning method of glycine production waste water |
| CN109574224A (en) * | 2018-12-10 | 2019-04-05 | 中国科学院生态环境研究中心 | A kind of system and method for waste water of livestock poultry processing |
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