CN107129057A - A kind of compound dephosphorization agent and preparation method thereof - Google Patents
A kind of compound dephosphorization agent and preparation method thereof Download PDFInfo
- Publication number
- CN107129057A CN107129057A CN201710575467.2A CN201710575467A CN107129057A CN 107129057 A CN107129057 A CN 107129057A CN 201710575467 A CN201710575467 A CN 201710575467A CN 107129057 A CN107129057 A CN 107129057A
- Authority
- CN
- China
- Prior art keywords
- dephosphorization agent
- mass percent
- compound dephosphorization
- preparation
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 18
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 13
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 7
- 239000008103 glucose Substances 0.000 claims abstract description 7
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims abstract description 6
- 229930006000 Sucrose Natural products 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 22
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 4
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 abstract description 9
- 239000010802 sludge Substances 0.000 abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011574 phosphorus Substances 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 abstract description 2
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 150000001720 carbohydrates Chemical class 0.000 abstract description 2
- 235000014633 carbohydrates Nutrition 0.000 abstract description 2
- 230000000813 microbial effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 9
- 229960002713 calcium chloride Drugs 0.000 description 5
- 235000011147 magnesium chloride Nutrition 0.000 description 5
- 239000003814 drug Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- LLSDKQJKOVVTOJ-UHFFFAOYSA-L calcium chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Ca+2] LLSDKQJKOVVTOJ-UHFFFAOYSA-L 0.000 description 3
- 229940052299 calcium chloride dihydrate Drugs 0.000 description 3
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 description 3
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 229960002337 magnesium chloride Drugs 0.000 description 2
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 229960005069 calcium Drugs 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The present invention relates to a kind of compound dephosphorization agent and preparation method thereof, it is 28%-41% including sugared mass percent, soda ash mass percent is 0.08%-0.2%, and magnesium salts mass percent is 1.2%-1.52%, calcium salt mass percent is 0.1%-0.33%, and remaining is water；Designed more than, improve microbial activity using the extraordinary carbohydrate of biodegradability (glucose, white sugar etc.), improve biological phosphate-eliminating efficiency, and add a small amount of calcium and magnesium salts, the phosphorus of guanite (ammonium magnesium phosphate) precipitation, effectively control remnants of indissoluble is formed, makes phosphorus content reduction in below 0.5mg/l, the inorganic sludge quantity that the product is produced seldom, significantly reduces the processing pressure of solid sludges.
Description
Technical field
The present invention relates to dephosphorization agent and preparation method thereof, more particularly to a kind of compound dephosphorization agent and preparation method thereof.
Background technology
Phosphorus in aquatic environment is one of important indicator of body eutrophication, and China's body eutrophication is increasingly severe,
Trade effluent and sanitary sewage discharge standard are also improved year by year, and phosphorus is improved till now as index of keeping under strict control from 5mg/l several years ago
0.5mg/l, traditional biological phosphate-eliminating can not accomplish qualified discharge, it is necessary to which auxiliary, which adds chemicals dephosphorization agent, to be met
It is required that.
At present, most of dephosphorization agent in inorganic molysite, aluminium salt, calcium salt or iron aluminium calcium and magnesium compound based on, formed
Metal phosphate is precipitated, and is removed by way of spoil disposal, phosphor-removing effect is good, but the utilization rate of product is low, sludge output big, great Liang Jin
The addition of category thing is unfavorable for biosystem growth, is unfavorable for sludge incineration or compost disposal.
The content of the invention
It is an object of the invention to provide a kind of compound dephosphorization agent and preparation method thereof, to solve the upper of prior art presence
State at least one of defect.
For up to above-mentioned purpose, the technical solution adopted by the present invention is as follows：
A kind of compound dephosphorization agent, it is characterised in that the percentage by weight composition of the compound dephosphorization agent is as follows：Saccharic
Amount percentage is 28%-41%, and soda ash mass percent is 0.08%-0.2%, and magnesium salts mass percent is 1.2%-
1.52%, calcium salt mass percent is 0.1%-0.33%, and remaining is water.
Preferably, the percentage by weight composition of the compound dephosphorization agent is as follows：Sugared mass percent is 30%-40%,
Soda ash mass percent is 0.1%-0.18%, and magnesium salts mass percent is 1.25%-1.46%, and calcium salt mass percent is
0.15%-0.3%, remaining is water.
Preferably, the sugar is glucose or white sugar.
Preferably, the magnesium salts is magnesium chloride.
Preferably, the calcium salt is calcium chloride.
A kind of preparation method of compound dephosphorization agent, it is characterised in that the preparation method includes：
S1：To a cube plastics retort injection running water, magnesium chloride is added, is stirred, fully dissolving；
S2：Continue to add calcium chloride to above-mentioned retort, stir, fully dissolving；
S3：Under stirring, sugar is continuously added, is stirred；
S4：Soda ash dry powder is added by automatically controlling, intermittence stirring makes pH value stable between 7.2-9.
Preferably, mixing time is 13-25min in the step S1.
Preferably, mixing time is 13-25min in the step S2.
Preferably, mixing time is 28-42min in the step S3.
Preferably, the step S4 intermittents mixing time is 4-5 hours, is stirred 9-15 minutes, the 15-25 that rests points
Clock, temperature control is below 20 degrees Celsius in whipping process.
Compared with prior art, the present invention at least has the advantages that：The present invention includes sugared mass percent
28%-41%, soda ash mass percent is 0.08%-0.2%, and magnesium salts mass percent is 1.2%-1.52%, calcium salt quality
Percentage is 0.1%-0.33%, and remaining is water；Designed more than, it is (glucose, white using the extraordinary carbohydrate of biodegradability
Sugar etc.) improve microbial activity, improve biological phosphate-eliminating efficiency, and a small amount of calcium and magnesium salts is added, form the guanite of indissoluble
(ammonium magnesium phosphate) is precipitated, effectively the remaining phosphorus of control, the inorganic dirt for making phosphorus content reduction be produced in below 0.5mg/l, the product
Mud amount seldom, significantly reduces the processing pressure of solid sludges.
Embodiment
Below according to embodiment, the present invention will be further described.
The composition of four kinds of compound dephosphorization agents is provided below, it is specific as follows.
Embodiment one
A kind of compound dephosphorization agent, the percentage by weight composition of the compound dephosphorization agent is as follows：Sugared mass percent is
28%, soda ash mass percent is 0.08%, and magnesium salts mass percent is 1.2%, and calcium salt mass percent is 0.1%, remaining
For water.
By taking sewage treatment plants practical application of the south containing trade effluent as an example, the sewage treatment plant uses A2O techniques,
The compound dephosphorization agent of embodiment one, processing data such as following table are added in aerobic section：
The inorganic salts proportion that precipitation is formed in medicament only has 1.58%, compared to general inorganic dephosphorization agent entirely by precipitation
The sludge that dephosphorization is formed will be many less.
Embodiment two
A kind of compound dephosphorization agent, the percentage by weight composition of the compound dephosphorization agent is as follows：Sugared mass percent is
41%, soda ash mass percent is 0.2%, and magnesium salts mass percent is 1.52%, and calcium salt mass percent is 0.33%, remaining
For water.
By taking sewage treatment plants practical application of the south containing trade effluent as an example, the sewage treatment plant uses A2O techniques,
The compound dephosphorization agent of embodiment two, processing data such as following table are added in aerobic section：
The inorganic salts proportion that precipitation is formed in medicament only has 1.51%, compared to general inorganic dephosphorization agent entirely by precipitation
The sludge that dephosphorization is formed will be many less.
Embodiment three
A kind of compound dephosphorization agent, the percentage by weight composition of the compound dephosphorization agent is as follows：Sugared mass percent is
35%, soda ash mass percent is 0.14%, and magnesium salts mass percent is 1.36%, and calcium salt mass percent is 0.21%, its
Yu Weishui.
By taking sewage treatment plants practical application of the south containing trade effluent as an example, the sewage treatment plant uses A2O techniques,
The compound dephosphorization agent of embodiment three, processing data such as following table are added in aerobic section：
The inorganic salts proportion that precipitation is formed in medicament only has 1.57%, compared to general inorganic dephosphorization agent entirely by precipitation
The sludge that dephosphorization is formed will be many less.
Example IV
A kind of compound dephosphorization agent, the percentage by weight composition of the compound dephosphorization agent is as follows：Sugared mass percent is
33%, soda ash mass percent is 0.13%, and magnesium salts mass percent is 1.33%, and calcium salt mass percent is 0.3%, remaining
For water.
By taking sewage treatment plants practical application of the south containing trade effluent as an example, the sewage treatment plant uses A2O techniques,
The compound dephosphorization agent of example IV, processing data such as following table are added in aerobic section：
The inorganic salts proportion that precipitation is formed in medicament only has 1.61%, compared to general inorganic dephosphorization agent entirely by precipitation
The sludge that dephosphorization is formed will be many less.
It is specific as follows according to above-mentioned compound dephosphorization agent, it is proposed that the preparation method of several compound dephosphorization agent.
Embodiment five
3000kg running water is injected to 5 cubes of plastics retort, 60kg magnesium chlorides (magnesium chloride hexahydrate) is added, stirs
13min, fully dissolving；
Continue to add 12kg calcium chloride (calcium chloride dihydrate) to above-mentioned retort, stir 13min, fully dissolving；
Under stirring, sugar (glucose or white sugar) 1500kg is continuously added, 28min is stirred；
PH instrument sets 7.5~8.5, and soda ash (sodium carbonate) dry powder is added by automatically controlling, intermittence 4 hours of stirring
(stirring 9min, stop 15min), temperature control makes pH value stable 7.5~8.5 below 20 DEG C.
Embodiment six
3000kg running water is injected to 5 cubes of plastics retort, 60kg magnesium chlorides (magnesium chloride hexahydrate) is added, stirs
25min, fully dissolving；
Continue to add 12kg calcium chloride (calcium chloride dihydrate) to above-mentioned retort, stir 25min, fully dissolving；
Under stirring, sugar (glucose or white sugar) 1500kg is continuously added, 42min is stirred；
PH instrument sets 7.5~8.5, and soda ash (sodium carbonate) dry powder is added by automatically controlling, intermittence 5 hours of stirring
(stirring 9min, stop 15min), temperature control makes pH value stable 7.5~8.5 below 20 DEG C.
Embodiment seven
3000kg running water is injected to 5 cubes of plastics retort, 60kg magnesium chlorides (magnesium chloride hexahydrate) is added, stirs
19min, fully dissolving；
Continue to add 12kg calcium chloride (calcium chloride dihydrate) to above-mentioned retort, stir 19min, fully dissolving；
Under stirring, sugar (glucose or white sugar) 1500kg is continuously added, 35min is stirred；
PH instrument sets 7.5~8.5, and soda ash (sodium carbonate) dry powder is added by automatically controlling, intermittence 4 hours of stirring
(stirring 12min, stop 20min), temperature control makes pH value stable 7.5~8.5 below 20 DEG C.
The present invention is described in detail above by specific embodiment, these detailed description are only limited to help
Skilled artisan understands that present disclosure, can not be interpreted as limiting the scope of the invention.The guarantor of the present invention
Shield scope is defined by the content of claims.
Claims (10)
1. a kind of compound dephosphorization agent, it is characterised in that the percentage by weight composition of the compound dephosphorization agent is as follows：Saccharic amount
Percentage is 28%-41%, and soda ash mass percent is 0.08%-0.2%, and magnesium salts mass percent is 1.2%-1.52%,
Calcium salt mass percent is 0.1%-0.33%, and remaining is water.
2. a kind of compound dephosphorization agent according to claim 1, it is characterised in that the weight hundred of the compound dephosphorization agent
Divide as follows than constituting：Sugared mass percent is 30%-40%, and soda ash mass percent is 0.1%-0.18%, magnesium salts quality hundred
Divide than being 1.25%-1.46%, calcium salt mass percent is 0.15%-0.3%, and remaining is water.
3. a kind of compound dephosphorization agent according to claim 1 or 2, it is characterised in that the sugar is glucose or white sugar.
4. a kind of compound dephosphorization agent according to claim 3, it is characterised in that the magnesium salts is magnesium chloride.
5. a kind of compound dephosphorization agent according to claim 4, it is characterised in that the calcium salt is calcium chloride.
6. the preparation method of the compound dephosphorization agent in a kind of 1-5 such as claim as described in any one, it is characterised in that described
Preparation method includes：
S1：To a cube plastics retort injection running water, magnesium chloride is added, is stirred, fully dissolving；
S2：Continue to add calcium chloride to above-mentioned retort, stir, fully dissolving；
S3：Under stirring, sugar is continuously added, is stirred；
S4：Soda ash dry powder is added by automatically controlling, intermittence stirring makes pH value stable between 7.2-9.
7. the preparation method of compound dephosphorization agent according to claim 6, it is characterised in that when being stirred in the step S1
Between be 13-25min.
8. the preparation method of the compound dephosphorization agent according to claim 7 or 8, it is characterised in that stirred in the step S2
The time is mixed for 13-25min.
9. the preparation method of compound dephosphorization agent according to claim 8, it is characterised in that when being stirred in the step S3
Between be 28-42min.
10. the preparation method of compound dephosphorization agent according to claim 9, it is characterised in that interval in the step S4
Property mixing time be 4-5 hour, stirring 9-15 minutes, rest 15-25 minutes, temperature control is at 20 degrees Celsius in whipping process
Below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575467.2A CN107129057A (en) | 2017-07-14 | 2017-07-14 | A kind of compound dephosphorization agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575467.2A CN107129057A (en) | 2017-07-14 | 2017-07-14 | A kind of compound dephosphorization agent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107129057A true CN107129057A (en) | 2017-09-05 |
Family
ID=59737592
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710575467.2A Pending CN107129057A (en) | 2017-07-14 | 2017-07-14 | A kind of compound dephosphorization agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113896307A (en) * | 2021-11-04 | 2022-01-07 | 安徽绿洁环境科技有限公司 | Composite phosphorus removal agent for sewage treatment and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106006954A (en) * | 2016-05-24 | 2016-10-12 | 广东省环境科学研究院 | Method adopting waste molasses as nitrogen removal reinforcing carbon source of sewage treatment plant |
| CN106573811A (en) * | 2014-06-17 | 2017-04-19 | 诺维信公司 | Biological phosphorus removal from wastewater |
-
2017
- 2017-07-14 CN CN201710575467.2A patent/CN107129057A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106573811A (en) * | 2014-06-17 | 2017-04-19 | 诺维信公司 | Biological phosphorus removal from wastewater |
| CN106006954A (en) * | 2016-05-24 | 2016-10-12 | 广东省环境科学研究院 | Method adopting waste molasses as nitrogen removal reinforcing carbon source of sewage treatment plant |
Non-Patent Citations (2)
| Title |
|---|
| 冯生华等: "生物除磷糖控制（CHC）工艺的试验研究", 《给水排水》 * |
| 周建石: "厌氧养猪废水中磷的化学固定与回收原理研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113896307A (en) * | 2021-11-04 | 2022-01-07 | 安徽绿洁环境科技有限公司 | Composite phosphorus removal agent for sewage treatment and preparation method thereof |
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