CN102745839A - Treatment method for removing ammonia nitrogen in waste water - Google Patents
Treatment method for removing ammonia nitrogen in waste water Download PDFInfo
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- CN102745839A CN102745839A CN2012102681696A CN201210268169A CN102745839A CN 102745839 A CN102745839 A CN 102745839A CN 2012102681696 A CN2012102681696 A CN 2012102681696A CN 201210268169 A CN201210268169 A CN 201210268169A CN 102745839 A CN102745839 A CN 102745839A
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- waste water
- ammonia nitrogen
- phosphoric acid
- acid salt
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Abstract
The invention discloses a treatment method for removing ammonia nitrogen in waste water. The treatment method comprises the following steps: adding magnesium salt and phosphate to waste water; carrying out a combination reaction by the magnesium salt and the phosphate with the ammonia nitrogen in the waste water to generate magnesium ammonium phosphate hexahydrate colloid; adding polymeric aluminium to the magnesium ammonium phosphate hexahydrate colloid to enable the magnesium ammonium phosphate hexahydrate colloid to precipitate; and removing the magnesium ammonium phosphate hexahydrate colloid precipitate. Compared with the prior art, according to the method for removing the ammonia nitrogen in the waste water, which is disclosed by the invention, the polymeric aluminium is added to the colloidal solution, so the speed of waste water treatment is greatly increased, and the ammonia nitrogen in the waste water can be stably and effectively removed; and furthermore, as the ammonia nitrogen is removed by using the method, yielding waste water can reach the primary standard of the national integrated wastewater discharge standard GB44/26-2001.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, be specifically related to a kind of removal treatment of ammonia nitrogen in wastewater method.
Background technology
In the prior art, the removal method of ammonia nitrogen has blow-off method and the pending method of break point chlorination method in the waste water, and the defective of its principle and existence is following:
1, blow-off method, its principle is: the pH value of waste water is transferred to about 11, make ammonia in the waste water present state of saturation and overflow, this process is carried out in stripping tower, for preventing the pollution of ammonia (NH3), the gas that makes stripping tower through sulphuric acid soln to absorb ammonia.The defective of blow-off method is: (1) device systems is complicated, and investment is big, need set up stripping tower, gas blower, PH meter, stirrer, dosing pump and piping system etc.(2) working cost is high, need add medicament.(3) fluctuation of service.(4) ammonia nitrogen is converted into ammonium sulfate and also need further handles.
2, break point chlorination ratio juris, the break point chlorination ratio juris is: utilizing the strong oxidizing property of chlorine, is nitrogen (N2) with ammonia (NH3) oxygenolysis; In the process of chlorination, when chlorine was added to a certain value, chlorine residue began to reduce; This is a weight break point A, and along with the increase of chlorine, the amount of chlorine residue drops to valley; This is again a break B, and the increase residual chlorine amount along with chlorine increases thereupon afterwards, and the B point is called break.The defective that the break point chlorination method exists is: (1) device systems is complicated, and investment is big, need set up storage chlorine jar, and chlorinating machine is surveyed the chlorine appearance, stirrer, reactor drum and piping system etc.(2) fluctuation of service, working cost is high.(3) high to operational requirement.
A kind of removal treatment of ammonia nitrogen in wastewater of documents method (CN200610060173.8) discloses a kind of removal treatment of ammonia nitrogen in wastewater method, is included in to add magnesium salts and phosphoric acid salt in the waste water; Ammonia nitrogen generation combination reaction in magnesium salts and phosphoric acid salt and the waste water generates six hypophosphite monohydrate ammonia colloidal magnesiums; Six hypophosphite monohydrate ammonia colloidal magnesiums deposition is removed.Disclose the adding coagulant aids simultaneously, the particle of six hypophosphite monohydrate ammonia colloidal magnesiums is increased, improved sedimentary efficient.But the usage quantity of which kind of coagulant aids of unexposed use and coagulant aids can reach effective raising processing efficiency, does not also provide any enlightenment at this point.
Summary of the invention
The present invention is directed to above-mentioned prior art problem, a kind of more effectively method of fast processing ammonia nitrogen waste water is provided.
Present method is achieved in that
A kind of removal treatment of ammonia nitrogen in wastewater method comprises the steps:
(1) in waste water, add magnesium salts and phosphoric acid salt, said magnesium salts contains Mg
2+Ion, said phosphoric acid salt contains PO
4 3-, HPO
4 2-Or H
2PO
4 2-Ion;
(2) the ammonia nitrogen generation combination reaction in magnesium salts and phosphoric acid salt and the waste water generates six hypophosphite monohydrate ammonia colloidal magnesiums;
(3) in the six hypophosphite monohydrate ammonia colloidal magnesium aqueous solution, adding Poly aluminum Chloride (PAC) or SEPIGEL 305 makes it to precipitate;
(4) the sedimentary six hypophosphite monohydrate ammonia colloidal magnesiums of Poly aluminum Chloride (PAC) polymerization are removed.
Above-described Poly aluminum Chloride (PAC) or SEPIGEL 305 are the aqueous solution of 10-25% (W/W).
The addition of above-described Poly aluminum Chloride (PAC) or polyacrylamide solution is 2～5% (W/W) of required processing waste water.
Above-described removal treatment of ammonia nitrogen in wastewater method, before adding magnesium salts and the phosphoric acid salt, the pH value with waste water is adjusted to 6.5～9.0 earlier in waste water.
Before further preferably in waste water, adding magnesium salts and phosphoric acid salt, elder generation is with pH value to 7.5～8.0 of waste water.
Above-described removal treatment of ammonia nitrogen in wastewater method is characterized in that, in waste water, behind adding magnesium salts and the phosphoric acid salt, mixes, and the reaction times of step (2) was at least 0.5 hour.
Above-described a kind of removal treatment of ammonia nitrogen in wastewater method, said step (3) is carried out in settling tank, is at most 2 hours in the sedimentary time of settling tank.
The removal method of ammonia nitrogen also has following beneficial effect in the waste water of the present invention:
(1) need not transform, practice thrift investment existing installation;
(2) practice thrift the treatment time in a large number, only the ST practices thrift over half;
(3) running cost is low, and the Poly aluminum Chloride (PAC) of required interpolation or SEPIGEL 305 consumption are considerably less, on market, is very easy to obtain, and it is few to increase cost;
(4) removing the six hypophosphite monohydrate ammonia magnesium that the ammonia nitrogen in the waste water obtains with the present invention, is a kind of slow-release compound fertilizer, can be used for agriculture prodn effectively.
Embodiment
Embodiment 1:
Ammonia nitrogen concentration is 100mg/l in the waste water, and flow is 1.0m
3/ h, making the waste water that contains ammonia nitrogen get into volume is 100m
3Equalizing tank, homogenizing buffering water quality and quantity; Squeezing into volume through lift pump is 2m
3PH adjustment pond, added acid or alkali reaction 10 minutes, the pH value of waste water is controlled between 7.5～8.0; Making the waste water entering volume through the PH adjustment is 10m
3The combination reaction pond, add magnesium salts (Mg
2+) be 500mg/l (calculating) with wastewater volume, add phosphoric acid salt (PO
4 3-) be 1000mg/l (calculating) with wastewater volume, stirring reaction 1 hour; Making the waste water entering volume through reaction is 20m
3Flocculation basin, add Poly aluminum Chloride (PAC) 10% (W/W) aqueous solution coagulant aids of 2% (W/W) of waste water, reacted 0.5 hour; Making the waste water entering volume through flocculation is 100m
3Settling tank, effectively stop and carried out settlement separately in 2 hours, general solid waste disposal is made in supernatant discharging after the sludge dewatering of bottom
Present embodiment is handled waste water to remove ammonia nitrogen, can make that ammonia nitrogen drops to 5mg/l in the waste water, and clearance reaches 95%, slightly improves than documents, can stablize the primary standard that reaches national sewage comprehensive emission standard (GB44/26-2001).
Embodiment 2
Be breeding wastewater, ammonia nitrogen concentration is 100mg/l in the waste water, and adding magnesium salts (Mg2+) is 380mg/l, and adding phosphoric acid salt (PO43-) is 630mg/l; SEPIGEL 305 15% (W/W) aqueous solution coagulant aids that adds 3% (W/W) of waste water; Getting into volume through the waste water of flocculation is the settling tank of 100m 3, effectively stops to carry out settlement separately in 1 hour, and other are identical with embodiment 1.
Embodiment 3
Be general waste water, ammonia nitrogen concentration is 50mg/l in the waste water, and adding magnesium salts (Mg 2+) is 190mg/l, and adding phosphoric acid salt (PO43-) is 320mg/l; Poly aluminum Chloride (PAC) 20% (W/W) aqueous solution coagulant aids that adds 4% (W/W) of waste water; Getting into volume through the waste water of flocculation is the settling tank of 100m 3, effectively stops to carry out settlement separately in 1.5 hours, and other are identical with embodiment 1.
Embodiment 4
Waste water is percolate, and ammonia nitrogen concentration is 400mg/l in the waste water, and adding magnesium salts (Mg 2+) is 1500mg/l, and adding phosphoric acid salt (PO43-) is 2500mg/l; Add SEPIGEL 305 25% (W/W) aqueous solution coagulant aids of 5% (W/W) of waste water, other are identical with embodiment 1.
In the waste water of the present invention in the removal method of ammonia nitrogen magnesium salts and phosphatic consumption and kind, the ammonia nitrogen of waste water to drop to level and ammonia-N removal rate etc. relevant, can confirm through simple chemical test according to actual needs.
Claims (7)
1. remove the treatment of ammonia nitrogen in wastewater method for one kind, it is characterized in that: comprise the steps:
(1) in waste water, add magnesium salts and phosphoric acid salt, said magnesium salts contains Mg
2+Ion, said phosphoric acid salt contains PO
4 3-, HPO
4 2-Or H
2PO
4 2-Ion;
(2) the ammonia nitrogen generation combination reaction in magnesium salts and phosphoric acid salt and the waste water generates six hypophosphite monohydrate ammonia colloidal magnesiums;
(3) in the six hypophosphite monohydrate ammonia colloidal magnesium aqueous solution, adding Poly aluminum Chloride (PAC) or SEPIGEL 305 makes it to precipitate;
(4) the sedimentary six hypophosphite monohydrate ammonia colloidal magnesiums of Poly aluminum Chloride (PAC) polymerization are removed.
2. removal treatment of ammonia nitrogen in wastewater method according to claim 1 is characterized in that: described Poly aluminum Chloride (PAC) or SEPIGEL 305 are the aqueous solution of 10-25% (W/W).
3. removal treatment of ammonia nitrogen in wastewater method according to claim 2 is characterized in that: the addition of described Poly aluminum Chloride (PAC) or polyacrylamide solution is 2～5% (W/W) of required processing waste water.
4. according to the arbitrary described removal treatment of ammonia nitrogen in wastewater method of claim 1-3, it is characterized in that before adding magnesium salts and the phosphoric acid salt, the pH value with waste water is adjusted to 6.5～9.0 earlier in waste water.
5. removal treatment of ammonia nitrogen in wastewater method according to claim 4 is characterized in that, before adding magnesium salts and the phosphoric acid salt, elder generation is with pH value to 7.5～8.0 of waste water in waste water.
6. according to claim 1-3,4 described removal treatment of ammonia nitrogen in wastewater methods is characterized in that, in waste water, behind adding magnesium salts and the phosphoric acid salt, mix, and the reaction times of step (2) was at least 0.5 hour.
7. removal treatment of ammonia nitrogen in wastewater method according to claim 6 is characterized in that said step (3) is carried out in settling tank, be at most 2 hours in the sedimentary time of settling tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102681696A CN102745839A (en) | 2012-07-31 | 2012-07-31 | Treatment method for removing ammonia nitrogen in waste water |
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|---|---|---|---|
| CN2012102681696A CN102745839A (en) | 2012-07-31 | 2012-07-31 | Treatment method for removing ammonia nitrogen in waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601716A (en) * | 2017-10-24 | 2018-01-19 | 上海纳米技术及应用国家工程研究中心有限公司 | The method for improving guanite precipitation method processing ammonia nitrogen waste water efficiency |
| CN109368848A (en) * | 2018-11-01 | 2019-02-22 | 深圳永清水务有限责任公司 | A kind of preprocess method of scale animal and poultry cultivation waste water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001053202A1 (en) * | 2000-01-24 | 2001-07-26 | Isg Resources, Inc. | Enhancement of ammonia containing fly ash and collection of ammonia byproduct |
| CN1837082A (en) * | 2006-04-05 | 2006-09-27 | 深圳市金达莱环保有限公司 | Treatment process for removing ammonia nitrogen in waste water |
| CN100999366A (en) * | 2006-12-30 | 2007-07-18 | 山东大隆实业有限公司 | Coking waste water reuse treatment method |
| CN201678504U (en) * | 2010-04-07 | 2010-12-22 | 中国科学院南京土壤研究所 | High-concentration ammonia nitrogen waste water treatment device |
-
2012
- 2012-07-31 CN CN2012102681696A patent/CN102745839A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001053202A1 (en) * | 2000-01-24 | 2001-07-26 | Isg Resources, Inc. | Enhancement of ammonia containing fly ash and collection of ammonia byproduct |
| CN1837082A (en) * | 2006-04-05 | 2006-09-27 | 深圳市金达莱环保有限公司 | Treatment process for removing ammonia nitrogen in waste water |
| CN100999366A (en) * | 2006-12-30 | 2007-07-18 | 山东大隆实业有限公司 | Coking waste water reuse treatment method |
| CN201678504U (en) * | 2010-04-07 | 2010-12-22 | 中国科学院南京土壤研究所 | High-concentration ammonia nitrogen waste water treatment device |
Non-Patent Citations (1)
| Title |
|---|
| 姚重华: "《混凝剂与絮凝剂》", 31 March 1991, 中国环境科学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601716A (en) * | 2017-10-24 | 2018-01-19 | 上海纳米技术及应用国家工程研究中心有限公司 | The method for improving guanite precipitation method processing ammonia nitrogen waste water efficiency |
| CN109368848A (en) * | 2018-11-01 | 2019-02-22 | 深圳永清水务有限责任公司 | A kind of preprocess method of scale animal and poultry cultivation waste water |
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Application publication date: 20121024 |