CN109179747A - The system and technique of ammonia nitrogen in a kind of removal waste water - Google Patents

The system and technique of ammonia nitrogen in a kind of removal waste water Download PDF

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Publication number
CN109179747A
CN109179747A CN201811001242.7A CN201811001242A CN109179747A CN 109179747 A CN109179747 A CN 109179747A CN 201811001242 A CN201811001242 A CN 201811001242A CN 109179747 A CN109179747 A CN 109179747A
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CN
China
Prior art keywords
waste water
ammonia nitrogen
precipitating
pond
technique
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Pending
Application number
CN201811001242.7A
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Chinese (zh)
Inventor
孙广
李勇
赵永清
朱德林
曾贯虹
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LUTIANHUA CO Ltd SICHUAN
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LUTIANHUA CO Ltd SICHUAN
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Priority to CN201811001242.7A priority Critical patent/CN109179747A/en
Publication of CN109179747A publication Critical patent/CN109179747A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The invention discloses the system and technique of ammonia nitrogen in a kind of removal waste water, which includes primary clarifier, PH conditioning tank, precipitating generate pond and settling tank, and waste water is first after primary clarifier carries out primary deposition, into PH conditioning tank, using Na3PO4Waste water PH is adjusted to 9.5 ~ 10, enters back into precipitating generate pond, adds MgCl2, it is made to generate the double salt MgNH of indissoluble with the ammonia nitrogen in waste water4PO4·6H2O precipitating, overflow enter settling tank, to achieve the purpose that purify ammonia nitrogen in waste water.The rate of release of the ammonium magnesium phosphate nutrient of generation fertilizer more solvable than other is slow, can make slow-release fertilizer, adds in compound fertilizer, has that fertilizer efficiency utilization rate is high, is not in chemical fertilizer calcination etc. a little, achievees the purpose that comprehensive utilization of waste materials.

Description

The system and technique of ammonia nitrogen in a kind of removal waste water
Technical field
The present invention relates to the systems and technology field of ammonia nitrogen in removal waste water, and in particular to a kind of phosphorous, sulphur, ammonia nitrogen waste water The environment-protective process of processing, and make that treated water reaches national grade one discharge standard discharge.
Background technique
As the rapid development of the industries such as chemical fertilizer, petrochemical industry is grown, the high ammonia-nitrogen wastewater generated therefrom also becomes industry hair Open up one of restraining factors;Attention of the modern society to environmental protection, China are just gradually reinforcing the preventing and controlling of water pollution, And the regulation of ammonia nitrogen pollutant has been very urgent in the process.Ammonia nitrogen is extremely serious, ammonia nitrogen to the pollution of water body It is discharged into water body, will lead to water eutrophication, toxic action is generated to aquatile, increases the difficulty of Water purification, and by The NO3-N and NO2-N that oxidation generates also will affect the aquatile even health of the mankind.China's surface water body and ground at present Ammonia and nitrogen pollution situation in lower water body is increasingly serious, normal Nitrogen transformation in natural ecosystems is destroyed, to water ring Border and human health cause it is serious influence and it is potentially hazardous.
The method of ammonia nitrogen degradation includes that main minimizing technology has physical absorption, catalysis oxidation and Biological Pretreatment method, object The processing of change method has quickly, efficient feature, but its is costly, complicated for operation, and is easy to produce secondary pollution, therefore, raw Object method processing ammonia nitrogen waste water in especially wastewater flow rate it is big in the case where, have more obvious advantage.Ammonia nitrogen is polar molecule, Common adsorbents, such as active carbon, zeolite, haydite need to be modified, and adsorption effect is limited, reaching saturation need to carry out again Raw, comprehensive treatment effect and economy are relatively suitable for burst Pollution, should not be used as conventional treatment method.Ammonia nitrogen pole in water body For stabilization, general oxidant is difficult to aoxidize it, generally uses catalysis oxidation, but ineffective and operating cost is high.From Treatment effect and economy consider that biological treatment is that optimal selection is also common method.Current bioremediation technique has The angle of many kinds, including biological rotating disk, SBR, oxidation ditch etc., biology is main or nitration denitrification technique, the technique have There is efficient economizing consumptive material, but there is also some problems, such as: the nitrification stage needs the denitrification rank under aerobic condition Section needs to carry out under anaerobic, and the capital expenditure thus needed is big, and engineering operation portion stablizes, and aerobic tank needs a large amount of expose Gas, therefore go to expand new ammonia nitrogen degradation technique from new biology angle and have very big necessity.
Therefore, cost-effective control high density pollution also becomes the important topic of current environmental worker's research, obtains The great attention of insider.But current ammonia nitrogen biological treatment mode, which has to pass through a succession of biological respinse, to be completed, Investment is big, structure is complicated, treatment effeciency is low.Although having there is chemical precipitation method to handle the waste water containing ammonia nitrogen at present Technique, but its complex process, system operatio is cumbersome, and preparation cost is high.
Summary of the invention
In view of above-mentioned analysis, the invention discloses the systems and technique of ammonia nitrogen in a kind of removal waste water, locate through the invention Waste water after reason can not only handle the waste water of various concentration, and ammonia nitrogen removal frank is high, while easy to operate, and entire processing pond is outdoor Pond, inner glass steel anti-corrosion solve the problems, such as that traditional equipment is shorter using the corrosion in water bring service life.
The invention is realized by the following technical scheme:
The system of ammonia nitrogen in a kind of removal waste water, including primary clarifier, the PH conditioning tank, the connection PH tune that connect primary clarifier Save the precipitating generate pond in pond and the settling tank of connection precipitating generate pond;Each pond inner wall uses inner glass steel anti-corrosion, can have Effect solves corrosion in water;The precipitating generate pond is equipped with baffle plate, and phosphorous, sulfur-bearing ammonia nitrogen waste water enters baffling after precipitating generate pond Pass through, to increase the reaction time;It is also set up in precipitating generate pond there are two dispensing slot, for tertiary sodium phosphate needed for configuring reaction And magnesium chloride solution.
The present invention also provides a kind of techniques of ammonia nitrogen in removal waste water, comprising the following steps:
(1) preliminary treatment: the waste water containing phosphorus, sulphur, ammonia nitrogen is introduced into primary clarifier, exhaust particulate matter etc. sufficiently after precipitating Impurity;
(2) it adjusts pH value: the waste water after removal impurity is introduced into PH conditioning tank, addition trisodium phosphate solution, adjusting PH to 9 ~ 10, precipitating generate pond is introduced into after pH value is stablized;
(3) precipitating generates: MgCl is added into precipitating generate pond2, sufficiently reacted with the ammonia nitrogen in waste water and generate double salt MgNH4PO4·6H2O precipitating;
(4) check analysis: and then overflow enters settling tank, analyzes gained ammonia nitrogen in waste water, and collect sediment.
Further, ammonia nitrogen in waste water analysis failure continues back PH conditioning tank progress secondary response in the settling tank, Until qualified discharge.
Further, sediment is recycled for extrusion compound fertilizer.
The beneficial effects of the present invention are:
1. this system device is simple, easy to operate, work efficiency is high, saves production cost.
2. this system can handle the waste water of various concentration, ammonia nitrogen removal frank is high, reaches national grade one discharge standard after processing ≤ 15mg/L or less.
3. sediment can be used for the recycling of extrusion compound fertilizer after collecting, " treatment of wastes with processes of wastes against one another, with useless system fertilizer " is realized, Meet recycling economy development direction, secondary pollution will not be generated, mitigates the burden to environment.
4. the present invention adjusts waste water PH to 9 ~ 10, the scope control of this PH can both accelerate reaction speed, while as production The sediment of product improves the performance of complex fertilizer product with the acidity that can be neutralized in compound fertilizer after high PH.
Detailed description of the invention
Fig. 1 is present system schematic diagram.
Fig. 2 is the flow chart of present invention process.
In figure: 1. primary clarifiers;2.PH conditioning tank;3. precipitating generate pond;4. settling tank;5. baffle plate.
Specific embodiment
Embodiment 1
The system of ammonia nitrogen in a kind of removal waste water, as shown in Figure 1, including primary clarifier 1, the PH tune for connecting primary clarifier 1 Save the settling tank 4 in pond 2, the precipitating generate pond 3 for connecting PH conditioning tank 2 and connection precipitating generate pond 3;In each pond inner wall uses Portion's Corrosion Protection of Fiber Reinforced Plastics, can effectively solve corrosion in water;The precipitating generate pond 3 is equipped with baffle plate 5, phosphorous, sulfur-bearing ammonia nitrogen waste water Baffling passes through after into precipitating generate pond 3, to increase the reaction time;It is also set up in precipitating generate pond 3 there are two dispensing slot, is used Tertiary sodium phosphate and magnesium chloride solution needed for configuration is reacted.
The technique of ammonia nitrogen in a kind of removal waste water, and as shown in Figure 2 (occur ammonia nitrogen reaction tank and sedimentation basin in Fig. 2, it is practical It is all to occur in precipitating generate pond, therefore ammonia nitrogen reaction tank and sedimentation basin are referred to as precipitating and are generated that upper ammonia nitrogen reaction, which generates precipitating, Pond).
(1) preliminary treatment: the waste water containing phosphorus, sulphur, ammonia nitrogen is introduced into primary clarifier, and particle sufficiently is discharged after precipitating The impurity such as object;
(2) it adjusts pH value: the waste water after removal impurity being introduced into PH conditioning tank, trisodium phosphate solution is added, adjusts PH to 9, Precipitating generate pond is introduced into after pH value is stablized;
(3) precipitating generates: MgCl is added into precipitating generate pond2, sufficiently reacted with the ammonia nitrogen in waste water and generate double salt MgNH4PO4·6H2O precipitating;
(4) check analysis: and then overflow enters settling tank, analyzes gained ammonia nitrogen in waste water, and collects sediment for squeezing Method compound fertilizer recycles, and being down to sodium formula reagent photometric analysis ammonia-nitrogen content can direct emission after 15mg/Kg or less.
Using this process waste water of 400mg/L containing ammonia nitrogen, it is as follows that water outlet detects each content: ammonia nitrogen 5mg/L, nitrate nitrogen 5mg/ L, nitrite nitrogen 10mg/L, total nitrogen 20mg/L, COD50mg/L, ammonia nitrogen removal frank 98.8%, nitrogen removal rate 95%.
Embodiment 2
The technique of ammonia nitrogen in a kind of removal waste water, as shown in Figure 2.
(1) preliminary treatment: the waste water containing phosphorus, sulphur, ammonia nitrogen is introduced into primary clarifier, and particle sufficiently is discharged after precipitating The impurity such as object;
(2) adjust pH value: by remove impurity after waste water is introduced into PH conditioning tank, be added trisodium phosphate solution, adjusting PH to 9.5, precipitating generate pond is introduced into after pH value is stablized;
(3) precipitating generates: MgCl is added into precipitating generate pond2, sufficiently reacted with the ammonia nitrogen in waste water and generate double salt MgNH4PO4·6H2O precipitating;
(4) check analysis: and then overflow enters settling tank, analyzes gained ammonia nitrogen in waste water, and collects sediment for squeezing Method compound fertilizer recycles, and being down to sodium formula reagent photometric analysis ammonia-nitrogen content can direct emission after 15mg/Kg or less.
Using this process waste water of 600mg/L containing ammonia nitrogen, it is as follows that water outlet detects each content: ammonia nitrogen 5mg/L, nitrate nitrogen 10mg/L, nitrite nitrogen 15mg/L, total nitrogen 30mg/L, COD45mg/L, ammonia nitrogen removal frank 99.2%, nitrogen removal rate 94%.
Embodiment 3
The technique of ammonia nitrogen in a kind of removal waste water, as shown in Figure 2.
(1) preliminary treatment: the waste water containing phosphorus, sulphur, ammonia nitrogen is introduced into primary clarifier, and particle sufficiently is discharged after precipitating The impurity such as object;
(2) it adjusts pH value: the waste water after removal impurity being introduced into PH conditioning tank, trisodium phosphate solution is added, adjusts PH to 10, Precipitating generate pond is introduced into after pH value is stablized;
(3) precipitating generates: MgCl is added into precipitating generate pond2, sufficiently reacted with the ammonia nitrogen in waste water and generate double salt MgNH4PO4·6H2O precipitating;
(4) check analysis: and then overflow enters settling tank, analyzes gained ammonia nitrogen in waste water, and collects sediment for squeezing Method compound fertilizer recycles, and being down to sodium formula reagent photometric analysis ammonia-nitrogen content can direct emission after 15mg/Kg or less.
Using this process waste water of 800mg/L containing ammonia nitrogen, it is as follows that water outlet detects each content: ammonia nitrogen 5mg/L, nitrate nitrogen 16mg/L, nitrite nitrogen 34mg/L, total nitrogen 54mg/L, COD40mg/L, ammonia nitrogen removal frank 99.4%, nitrogen removal rate 93.3%.
Ammonia nitrogen concentration in embodiment is detected, using ammonia nitrogen concentration in Na's reagent detection liquid phase, analysis side Method is referring to national standard GB7479-87.Ammonia nitrogen concentration test carries out in sealing conical flask.It is dense that certain volume difference is added in conical flask The simulated wastewater of degree.Conical flask uses magnetic stirrer, and reaction temperature is constant, intermittently takes quantitative supernatant dense for ammonia nitrogen Degree measurement.
(1)
(2)
The preferred embodiment of invention described above, it is noted that for those skilled in the art, do not departing from Under the premise of structure of the invention, various modifications and improvements can be made, these also should be considered as protection scope of the present invention, this It all will not influence effect and patent practicability of the invention a bit.

Claims (4)

1. the system of ammonia nitrogen in a kind of removal waste water, which is characterized in that the system includes primary clarifier (1), connects primary sink The sedimentation of the PH conditioning tank (2) in shallow lake pond (1), the precipitating generate pond (3) for connecting PH conditioning tank (2) and connection precipitating generate pond (3) Pond (4);Each pond inner wall uses inner glass steel anti-corrosion;The precipitating generate pond (3) is equipped with baffle plate (5), and precipitating generates Dispensing slot there are two being also set up on pond (3).
2. it is a kind of removal waste water in ammonia nitrogen technique, which is characterized in that the technique the following steps are included:
(1) preliminary treatment: the waste water containing phosphorus, sulphur, ammonia nitrogen is introduced into primary clarifier, exhaust particulate matter etc. sufficiently after precipitating Impurity;
(2) it adjusts pH value: the waste water after removal impurity is introduced into PH conditioning tank, addition trisodium phosphate solution, adjusting PH to 9 ~ 10, precipitating generate pond is introduced into after pH value is stablized;
(3) precipitating generates: MgCl is added into precipitating generate pond2, sufficiently reacted with the ammonia nitrogen in waste water and generate double salt MgNH4PO4·6H2O precipitating;
(4) check analysis: and then overflow enters settling tank, analyzes gained ammonia nitrogen in waste water, and collect sediment.
3. technique according to claim 2, which is characterized in that ammonia nitrogen in waste water analysis failure continues in the settling tank It returns PH conditioning tank and carries out secondary response, until qualified discharge.
4. technique according to claim 2, which is characterized in that sediment is recycled for extrusion compound fertilizer.
CN201811001242.7A 2018-08-30 2018-08-30 The system and technique of ammonia nitrogen in a kind of removal waste water Pending CN109179747A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363612B1 (en) * 1988-10-11 1992-07-22 Passavant-Werke Ag Process for removal of waste waters with a high concentration of ammoniacal nitrogen
CN101148301A (en) * 2007-08-21 2008-03-26 南京大学 Method for removing ammonia and nitrogen from coking wastewater
CN101555076A (en) * 2008-04-11 2009-10-14 中国科学院广州地球化学研究所 Ammonian remover used for treating highly concentrated ammonian wastewater and treatment method
CN108002661A (en) * 2017-12-29 2018-05-08 什邡市长丰化工有限公司 A kind of nitrogenous, phosphorus waste water processing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363612B1 (en) * 1988-10-11 1992-07-22 Passavant-Werke Ag Process for removal of waste waters with a high concentration of ammoniacal nitrogen
CN101148301A (en) * 2007-08-21 2008-03-26 南京大学 Method for removing ammonia and nitrogen from coking wastewater
CN101555076A (en) * 2008-04-11 2009-10-14 中国科学院广州地球化学研究所 Ammonian remover used for treating highly concentrated ammonian wastewater and treatment method
CN108002661A (en) * 2017-12-29 2018-05-08 什邡市长丰化工有限公司 A kind of nitrogenous, phosphorus waste water processing method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
曾郴林等: "《工业废水处理工程设计实例》", 31 October 2016, 中国环境出版社 *
高艳玲: "《城市污水处理技术及工艺运行管理》", 31 July 2012, 中国建材工业出版社 *

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