CN112661315A - Low-cost treatment method for high-concentration phosphoric acid-containing wastewater - Google Patents
Low-cost treatment method for high-concentration phosphoric acid-containing wastewater Download PDFInfo
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- CN112661315A CN112661315A CN202110029530.9A CN202110029530A CN112661315A CN 112661315 A CN112661315 A CN 112661315A CN 202110029530 A CN202110029530 A CN 202110029530A CN 112661315 A CN112661315 A CN 112661315A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 81
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 42
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 31
- 239000011574 phosphorus Substances 0.000 claims abstract description 31
- 239000000706 filtrate Substances 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 7
- 239000002244 precipitate Substances 0.000 claims abstract description 7
- 238000012946 outsourcing Methods 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 229960004887 ferric hydroxide Drugs 0.000 claims description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Abstract
The invention discloses a low-cost treatment method of high-concentration phosphoric acid-containing wastewater, relates to the technical field of wastewater treatment, and aims at solving the problem of high treatment cost of high-concentration phosphoric acid-containing wastewater in the prior art, the following scheme is proposed, and the method comprises the following steps: s1, pretreating the high-concentration phosphorus-containing wastewater to obtain a pretreatment solution; s2, adding the sludge, the pretreatment solution and the alkaline matters in the sludge concentration tank into the high-concentration wastewater reaction tank for neutralization, and stirring to obtain a mixture containing precipitates; s3, filtering the mixture fully stirred in the step S2, enabling the filtrate to enter a low-concentration wastewater collection pool, and outsourcing the filter residue; s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard. The method has the advantages of simple and easy operation of the treatment process of the high-concentration phosphorus-containing wastewater, simple used equipment, low energy consumption and low treatment cost, and can more quickly and efficiently finish the treatment of the high-concentration phosphorus-containing wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a low-cost treatment method for high-concentration phosphoric acid-containing wastewater.
Background
With the rapid development of economy in China, a large amount of high-concentration phosphorus-containing wastewater is discharged by a plurality of factories, meanwhile, domestic sewage and livestock husbandry wastewater are also sources of the phosphorus-containing wastewater, the discharge of the phosphorus-containing wastewater can cause the excessive propagation of algae, the eutrophication of water bodies and the pollution to water environment, and the problem of wastewater pollution also seriously restricts the sustainable development of related industries. Therefore, ensuring the effective treatment and standard discharge of the phosphorus-containing wastewater is the difficult point and the key of water pollution control.
The existing high-concentration phosphorus-containing wastewater is mostly treated by adopting a pure chemical treatment method, a neutralization evaporative crystallization method or an evaporation method, and has the problems of complex used equipment, more chemical agents required to be input and high energy consumption, so that a low-cost treatment method for high-concentration phosphorus-containing wastewater is provided.
Disclosure of Invention
The invention provides a low-cost treatment method of high-concentration phosphoric acid-containing wastewater, and aims to reduce the medicament consumption and energy consumption for treating the high-concentration phosphoric acid-containing wastewater, thereby reducing the treatment cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-cost treatment method of high-concentration phosphoric acid-containing wastewater comprises the following steps:
s1, pretreating the high-concentration phosphorus-containing wastewater to obtain a pretreatment solution;
s2, adding sludge in the sludge concentration tank, the pretreatment solution in the S1 and alkaline matters into the high-concentration wastewater reaction tank for neutralization, and stirring for 0.5-4 hours to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2, enabling the filtrate to enter a regulating tank, and outsourcing filter residues;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
Further, preprocessing in S1: the high-concentration phosphorus-containing wastewater is decolorized by using waste activated carbon, filtered and introduced into a water collecting tank.
Further, the alkaline matter in S2 can be liquid alkali or mold washing alkali, and the amount of the alkaline matter added in each cubic meter of phosphorus-containing wastewater is 0-250L.
Further, the pretreatment solution and the alkaline substance in the step S2 are introduced into the high concentration wastewater reaction tank by using a lift pump, and the sludge in the sludge concentration tank is collected into the high concentration wastewater reaction tank by the diaphragm pump.
Further, in S2, the sludge in the sludge concentration tank contains calcium hydroxide, aluminum hydroxide, and ferric hydroxideOne or more than one sludge is added in per cubic meter of phosphorus-containing wastewater, and the amount of the sludge is 0.5-4 m3。
Further, the filtration of the mixture in S3 was performed by using a membrane filter press of a low concentration treatment system.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, high-concentration phosphorus-containing wastewater is firstly subjected to decoloration filtration treatment, then is mixed with sludge, is stirred, is subjected to alkaline neutralization and then is filtered, a small amount of filtrate enters a low-concentration treatment system to be treated and is discharged after being qualified, the treatment process is simple and easy to operate, and the used equipment is simple, the energy consumption is low, and the treatment cost is low;
2. in the invention, the sludge containing one or more of calcium hydroxide, aluminum hydroxide and ferric hydroxide is used to replace chemical reagents, so that the cost is saved, the source is simple to obtain, and in addition, the more sludge is added in each cubic meter of high-concentration phosphorus-containing wastewater in a limited range, the more sludge is added, the usage amount of alkaline matters can be correspondingly reduced, and the treatment cost is further reduced;
3. compared with the treatment methods of a pure chemical treatment method, a neutralization evaporation crystallization method and an evaporation method in the prior art, the treatment method of the high-concentration phosphorus-containing wastewater has the advantages of low energy consumption, almost no weight increase of waste residues, simple equipment and low cost, and can quickly and efficiently finish the treatment of the high-concentration phosphorus-containing wastewater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
A low-cost treatment method of high-concentration phosphoric acid-containing wastewater comprises the following steps:
s1, decolorizing the high-concentration phosphorus-containing wastewater by using waste activated carbon, filtering and introducing the wastewater into a water collecting tank for pretreatment to obtain a pretreatment solution;
s2, adding the mixture into a high-concentration wastewater reaction tankSludge in sludge concentration tank, 1m3The added alkaline matter is 200L, the sludge in the sludge concentration tank contains calcium hydroxide, and the added sludge amount is 0.5m3Stirring for 0.5h in a high-concentration wastewater reaction tank by using a stirring machine to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2 by using a membrane filter press, feeding the filtrate into a low-concentration wastewater collection pool, and treating filter residues outside;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
Example two
A low-cost treatment method of high-concentration phosphoric acid-containing wastewater comprises the following steps:
s1, decolorizing the high-concentration phosphorus-containing wastewater by using waste activated carbon, filtering and introducing the wastewater into a water collecting tank for pretreatment to obtain a pretreatment solution;
s2, adding sludge in a sludge concentration tank and 1m into a high-concentration wastewater reaction tank3The added alkaline matter is 80L, the sludge in the sludge concentration tank contains calcium hydroxide and aluminum hydroxide, and the added sludge amount is 1m3Stirring for 2 hours in a high-concentration wastewater reaction tank by using a stirring machine to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2 by using a membrane filter press, feeding the filtrate into a low-concentration wastewater collection pool, and treating filter residues outside;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
EXAMPLE III
A low-cost treatment method of high-concentration phosphoric acid-containing wastewater comprises the following steps:
s1, decolorizing the high-concentration phosphorus-containing wastewater by using waste activated carbon, filtering and introducing the wastewater into a water collecting tank for pretreatment to obtain a pretreatment solution;
s2, adding sludge in a sludge concentration tank and 1m into a high-concentration wastewater reaction tank3Preparation ofNeutralizing the treated solution with liquid alkali, adding 45L of alkali, adding ferric hydroxide into sludge in the sludge concentration tank, and adding sludge in an amount of 2m3Stirring for 3 hours in a high-concentration wastewater reaction tank by using a stirring machine to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2 by using a membrane filter press, feeding the filtrate into a low-concentration wastewater collection pool, and treating filter residues outside;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
Example four
A low-cost treatment method of high-concentration phosphoric acid-containing wastewater comprises the following steps:
s1, decolorizing the high-concentration phosphorus-containing wastewater by using waste activated carbon, filtering and introducing the wastewater into a water collecting tank for pretreatment to obtain a pretreatment solution;
s2, adding sludge in a sludge concentration tank and 1m into a high-concentration wastewater reaction tank3The added alkaline matter is 30L, the sludge in the sludge concentration tank contains aluminum hydroxide, and the added sludge amount is 3m3Stirring for 4 hours in a high-concentration wastewater reaction tank by using a stirring machine to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2 by using a membrane filter press, feeding the filtrate into a low-concentration wastewater collection pool, and treating filter residues outside;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
1m in the above four groups of examples3After high-concentration phosphorus-containing wastewater is treated, phosphorus content is respectively detected, and the results are shown in the following table:
| amount of sludge (m)3) | Amount of alkalinity (L) | Phosphorus content (mg/L) | |
| Example one | 0.5 | 200 | 300 |
| Example two | 1 | 80 | 100 |
| EXAMPLE III | 2 | 45 | 50 |
| Example four | 3 | 30 | 10 |
As can be seen from the above table, the phosphorus content in the first to fourth examples is gradually reduced, which shows that in the limited range, the more sludge is added per cubic meter of wastewater, the less alkaline is added, and the phosphorus removal effect is the best.
Compared with three high-concentration phosphorus-containing wastewater treatment methods of a pure chemical treatment method, a neutralization evaporation crystallization method and an evaporation method in the prior art, the treatment method has the advantages as shown in the following conclusion:
as can be seen from the above table, compared with the three treatment modes in the prior art, the treatment method for the high-concentration phosphorus-containing wastewater has the advantages of low energy consumption, almost no weight increase of waste residues, simple equipment and low cost, and can more quickly and efficiently finish the treatment of the high-concentration phosphorus-containing wastewater.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A low-cost treatment method of high-concentration phosphoric acid-containing wastewater is characterized by comprising the following steps:
s1, pretreating the high-concentration phosphorus-containing wastewater to obtain a pretreatment solution;
s2, adding sludge in the sludge concentration tank, the pretreatment solution in the S1 and alkaline matters into the high-concentration wastewater reaction tank for neutralization, and stirring for 0.5-4 hours to obtain a mixture containing precipitates;
s3, filtering the mixture fully stirred in the step S2, enabling the filtrate to enter a low-concentration wastewater collection pool, and outsourcing the filter residue;
s4, treating the filtrate entering the low-concentration wastewater collecting tank by a low-concentration dephosphorization system, and discharging the filtrate after reaching the standard.
2. The method for low-cost treatment of high-concentration phosphoric acid-containing wastewater according to claim 1, characterized in that the pretreatment in S1: the high-concentration phosphorus-containing wastewater is decolorized by using waste activated carbon, filtered and introduced into a water collecting tank.
3. The method for low-cost treatment of high-concentration phosphoric acid-containing wastewater according to claim 1, wherein the alkaline substance in S2 can be liquid alkali or mold washing alkali, and the amount of alkaline substance added per cubic meter of phosphoric acid-containing wastewater is 0-250L.
4. The method for low-cost treatment of high-concentration phosphoric acid-containing wastewater according to claim 1, wherein the pretreatment solution and the alkaline substance in S2 are added into the high-concentration wastewater reaction tank by using a lift pump, and the sludge in the sludge concentration tank is collected into the high-concentration wastewater reaction tank by the diaphragm pump.
5. The method for low-cost treatment of high-concentration phosphoric acid-containing wastewater according to claim 1, wherein in S2, the sludge in the sludge concentration tank contains one or more of calcium hydroxide, aluminum hydroxide and ferric hydroxide, and the amount of the sludge added per cubic meter of the phosphoric acid-containing wastewater is 0.5-4 m3。
6. The method for treating high-concentration phosphoric acid-containing wastewater with low cost according to claim 1, wherein the filtration of the mixture in S3 is performed by a membrane filter press of a low-concentration treatment system.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006142191A (en) * | 2004-11-18 | 2006-06-08 | Kurita Water Ind Ltd | Method for treating phosphoric acid-containing drainage |
| CN102139974A (en) * | 2011-02-21 | 2011-08-03 | 李开明 | Treatment method of phosphorus-containing waste water |
| CN104445469A (en) * | 2014-12-18 | 2015-03-25 | 石泰山 | Method for treating phosphorus/phosphine-containing electroplating wastewater by utilizing electroplating sludge |
| CN105330000A (en) * | 2015-12-16 | 2016-02-17 | 武汉工程大学 | Treatment method of phosphoric acid wastewater |
| CN105366885A (en) * | 2015-11-20 | 2016-03-02 | 太仓市振锋化工设备有限公司 | Treatment method for phosphorus-containing wastewater |
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- 2021-01-11 CN CN202110029530.9A patent/CN112661315A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006142191A (en) * | 2004-11-18 | 2006-06-08 | Kurita Water Ind Ltd | Method for treating phosphoric acid-containing drainage |
| CN102139974A (en) * | 2011-02-21 | 2011-08-03 | 李开明 | Treatment method of phosphorus-containing waste water |
| CN104445469A (en) * | 2014-12-18 | 2015-03-25 | 石泰山 | Method for treating phosphorus/phosphine-containing electroplating wastewater by utilizing electroplating sludge |
| CN105366885A (en) * | 2015-11-20 | 2016-03-02 | 太仓市振锋化工设备有限公司 | Treatment method for phosphorus-containing wastewater |
| CN105330000A (en) * | 2015-12-16 | 2016-02-17 | 武汉工程大学 | Treatment method of phosphoric acid wastewater |
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