CN116514253A - Neutralization tank wastewater dephosphorization process - Google Patents
Neutralization tank wastewater dephosphorization process Download PDFInfo
- Publication number
- CN116514253A CN116514253A CN202310157306.7A CN202310157306A CN116514253A CN 116514253 A CN116514253 A CN 116514253A CN 202310157306 A CN202310157306 A CN 202310157306A CN 116514253 A CN116514253 A CN 116514253A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- neutralization tank
- dephosphorization process
- lime milk
- total phosphorus
- 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
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 45
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011574 phosphorus Substances 0.000 claims abstract description 34
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 34
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 14
- 239000004571 lime Substances 0.000 claims abstract description 14
- 239000008267 milk Substances 0.000 claims abstract description 14
- 210000004080 milk Anatomy 0.000 claims abstract description 14
- 235000013336 milk Nutrition 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241000143060 Americamysis bahia Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 orthophosphate ions Chemical class 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a neutralization tank wastewater dephosphorization process, wherein lime milk is directly added into the neutralization tank wastewater to react for dephosphorization, so that the total phosphorus content in the wastewater reaches the emission standard; according to the invention, 1.5 times of lime milk is directly added into the neutralization tank wastewater with the pH value of 1.98, the conductivity of 5730 mu s/cm and the total phosphorus content of 1375mg/L, other operations such as neutralization are not needed, and the operation steps are simplified, so that the purpose of removing phosphorus is achieved.
Description
Technical Field
The invention relates to the field of phosphorus-containing wastewater treatment of a neutralization tank, in particular to a wastewater phosphorus removal process of the neutralization tank.
Background
The phosphorus pollution can cause various degrees of harm to human bodies, marine organisms, soil and water bodies, especially phosphorus existing in the water bodies in the forms of orthophosphate ions, polyphosphate and organic forest compounds, and when the total mass concentration exceeds 86ug/L (stationary water body), the water body is judged to be eutrophicated and polluted by the phosphorus. Excessive phosphorus in the water body can cause malignant phenomena such as red tide, massive propagation of algae, death of fishes and shrimps and the like.
The discharge of phosphorus wastewater in human production activities is a key factor leading to eutrophication of water bodies in nature. Wherein the phosphorus content in the wastewater of the neutralization tank can reach 1375mg/L, and the wastewater also contains other heavy metals and other substances. If the coating wastewater is directly discharged without treatment, the polluted water body cannot be effectively treated. In the existing treatment process of the wastewater in the neutralization tank, the pH value of the wastewater needs to be adjusted, and then the next treatment is carried out, so that the total phosphorus removal effect is poor in the pH value adjustment process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a neutralization tank wastewater dephosphorization process which directly utilizes lime milk to remove phosphorus and can achieve the treatment aim without adjusting pH.
The aim of the invention is realized by the following technical scheme: a neutralization tank wastewater dephosphorization process directly adds lime milk to the neutralization tank wastewater to react to remove phosphorus so that the total phosphorus content in the wastewater reaches the emission standard.
Further, the addition amount of the lime milk is 1.5 times of the total phosphorus content in the wastewater.
Further, the pH of the wastewater is 1.98, the COD content is 188mg/L, the conductivity is 5730 mu s/cm, and the total phosphorus content is higher than 1000mg/L.
The beneficial effects of the invention are as follows: according to the invention, 1.5 times of lime milk is directly added into the neutralization tank wastewater with the pH value of 1.98, the conductivity of 5730 mu s/cm and the total phosphorus content of 1375mg/L, and other operations such as neutralization are not needed, so that the purpose of removing phosphorus is achieved.
Detailed Description
The technical scheme of the present invention is described in further detail below, but the scope of the present invention is not limited to the following.
The water sample of the example was south-charging neutralization tank wastewater, and the raw water quality of the neutralization tank wastewater is shown in table 1.
TABLE 1
Example 1
In the neutralization tank wastewater dephosphorization process, lime milk is directly added into the neutralization tank wastewater, and the reaction is continuously stirred and carried out for half an hour at normal temperature and normal pressure to remove phosphorus, so that the total phosphorus content in the wastewater reaches the discharge standard; the addition amount of the lime milk is 1.5 times of the total phosphorus content in the wastewater.
Comparative example 1
In the neutralization tank wastewater dephosphorization process, lime milk is directly added into the neutralization tank wastewater, and the reaction is continuously stirred and carried out for half an hour at normal temperature and normal pressure to remove phosphorus, so that the total phosphorus content in the wastewater reaches the discharge standard; the addition amount of the lime milk is 3.0 times of the total phosphorus content in the wastewater.
Comparative example 2
In the neutralization tank wastewater dephosphorization process, lime milk is directly added into the neutralization tank wastewater, and the reaction is continuously stirred and carried out for half an hour at normal temperature and normal pressure to remove phosphorus, so that the total phosphorus content in the wastewater reaches the discharge standard; the addition of the lime milk is 3.0 times of the total phosphorus content in the wastewater, and then the pH value of the wastewater is regulated to 8.5 by using hydrochloric acid.
The wastewater after dephosphorization of example 1 and comparative example 1-comparative example 2 was examined, and the examination results are shown in Table 2.
TABLE 2
As shown in the table above, compared with the pH value which is not regulated, the total phosphorus removal effect is slightly poor, and the experimental purpose can be achieved by adopting the adding amount of 1.5 times of calcium oxide, so that the wastewater after phosphorus removal reaches the comprehensive three-emission standard, and the wastewater is convenient for downstream sewage treatment plants to treat.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (3)
1. A neutralization tank wastewater dephosphorization process is characterized in that: lime milk is directly added into the wastewater of the neutralization tank to remove phosphorus by reaction, so that the total phosphorus content in the wastewater reaches the discharge standard.
2. The neutralization tank wastewater dephosphorization process as claimed in claim 1, wherein: the addition amount of the lime milk is 1.5 times of the total phosphorus content in the wastewater.
3. The neutralization tank wastewater dephosphorization process as claimed in claim 1, wherein: the pH value of the wastewater is 1.98, the COD content is 188mg/L, the conductivity is 5730 mu s/cm, and the total phosphorus content is higher than 1000mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310157306.7A CN116514253A (en) | 2023-02-23 | 2023-02-23 | Neutralization tank wastewater dephosphorization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310157306.7A CN116514253A (en) | 2023-02-23 | 2023-02-23 | Neutralization tank wastewater dephosphorization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116514253A true CN116514253A (en) | 2023-08-01 |
Family
ID=87392872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310157306.7A Pending CN116514253A (en) | 2023-02-23 | 2023-02-23 | Neutralization tank wastewater dephosphorization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116514253A (en) |
-
2023
- 2023-02-23 CN CN202310157306.7A patent/CN116514253A/en active Pending
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