CN107010690B - A kind of city domestic sewage dephosphorization agent and preparation method thereof - Google Patents
A kind of city domestic sewage dephosphorization agent and preparation method thereof Download PDFInfo
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- CN107010690B CN107010690B CN201710330530.6A CN201710330530A CN107010690B CN 107010690 B CN107010690 B CN 107010690B CN 201710330530 A CN201710330530 A CN 201710330530A CN 107010690 B CN107010690 B CN 107010690B
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F3/02—Aerobic processes
Abstract
The invention discloses a kind of city domestic sewage dephosphorization agents, the following raw material including weight percent: 20-70% polyaluminium sulfate, 20-70% bodied ferric sulfate, 0.1-5% calcium sulfate and 0.1-5% magnesia.The present invention prepares efficient city domestic sewage dephosphorization agent using safe and non-toxic raw material, and the sanitary sewage dephosphorization agent is environmentally friendly, nontoxic, not chloride ion-containing, without secondary pollution；Excellent cost performance；Each raw material easily obtain, production process is simple, and no waste water, exhaust gas, the three wastes such as solid that give up generate；The pH wide adaptation range of sewage dephosphorization agent, pH value of sewage water can be used within the scope of 3-11；With dephosphorization, except ammonia nitrogen, except COD, except the multiple functions such as SS, removing heavy metals, flocculation；City domestic sewage suitable for raw water total phosphorus concentration 1-5mg/L is handled；Processing sewage effect is obvious, and total phosphorus concentration can be dropped to 0.4mg/L or less by additive amount 10-200ppm；City domestic sewage dephosphorization processing cost is only 0.05-0.08 yuan/ton, effectively reduces the processing cost of sewage.
Description
Technical field
The invention belongs to water treatment field, a kind of city domestic sewage dephosphorization agent and preparation method thereof is particularly belonged to, and
Utilize the method for city domestic sewage dephosphorization agent processing city domestic sewage.
Background technique
City domestic sewage is mainly various water, slurry and use in toilet water institutes for kitchen use used in human lives
The discharge water of generation, predominantly nontoxic inorganic salts, containing a large amount of solid suspensions, can chemistry or biodegradable dissolubility
Or colloidal dispersion organic matter, nitrogenous compound, phosphate, potassium sodium and heavy metal ion, mushroom biota etc..If it is untreated or
Degree for the treatment of is insufficient and is discharged into natural water body, will lead to water eutrophication and toxicity accumulation, leads to the deterioration of the ecological environment.This year
Come, with being widely used for various detergent, the phosphorus content of sanitary sewage also increases extensively, and the high sewage of phosphorus content can cause
The enriched equal pollution of water body, therefore sanitary sewage is handled before discharging, to reduce the phosphorus content in waste water.
Currently, common dephosphorization agent is mainly made of single component in the market, function is relatively simple, and phosphor-removing effect is poor, city
It is difficult to reach national emission standard (≤0.5mg/L) after city's sewage treatment.Some sewage treatment plants also use liquid dephosphorization agent into
Row sewage treatment, but the packed and transported of liquid dephosphorization agent is inconvenient, and corrosivity is serious；And liquid dephosphorization agent contains chloride ion, it is raw
The secondary pollutions such as waste water are also easy to produce during producing.
Therefore, it is necessary to research and develop a kind of efficient solid dephosphorization agent without secondary pollution, to realize a kind of efficient, thorough
The sanitary sewage disposal technology at bottom, the sanitary sewage that makes that treated meet the discharge standard of country, are conducive to returning for sanitary sewage
It receives and utilizes.
Summary of the invention
The object of the present invention is to provide it is a kind of it is environmentally friendly, nontoxic, chloride ion-containing, efficient urban life without secondary pollution be not dirty
Water dephosphorization agent, the sanitary sewage dephosphorization agent are handled suitable for the city domestic sewage of raw water total phosphorus concentration 1-5mg/L, and PH adapts to model
It encloses extensively, cost performance is excellent；Its preparation process production process is simple, will not generate waste water, exhaust gas, without secondary pollution；Use process
It is convenient, the phosphorus content of city domestic sewage can be effectively reduced.
The technical solution used in the present invention are as follows: a kind of city domestic sewage dephosphorization agent, it is following including weight percent
Raw material:
Preferably, the calcium sulfate is calcium sulfate crystal whiskers.Calcium sulfate crystal whiskers are a kind of novel pins grown with single crystal form
Shape, the fiber sub-nanometer material perfect with uniform crosssection, complete shape, internal structure.Calcium sulfate crystal whiskers are with higher
Specific surface area, it is extremely strong to adsorption capacities such as calcium phosphate, magnesium phosphates, it can effectively adsorb phosphorus containg substances, such as calcium phosphate, magnesium phosphate
Deng.
Polyaluminium sulfate is composite polymer polymer, and molecular structure is huge, has very strong adsorption capacity, therefore energy
Effectively the phosphorus containg substances in absorption effluent, purifying water effect are excellent.Flocculated structure, settling velocity are formed by rear in its water
Fastly, activity is high, and filterability is good.Polyaluminium sulfate is stronger to the adaptability of various sewage, influences on pH value smaller.In addition, polymerization
Aluminum sulfate is small to equipment, corrosion of pipe, and easy to operate, usage amount is small, and This effectively reduces purification costs.
Bodied ferric sulfate is a kind of inorganic polymer flocculant of superior performance, can effectively adsorb the dirt in package sewage
Object is contaminated, COD, BOD content in water are effectively reduced.Easy to operate, usage amount is small, can significantly reduce purification cost.
Magnesia generates insoluble sediment magnesium hydroxide, the active big, adsorption capacity of magnesium hydroxide after being dissolved in water
It the advantages that strong, can the objectionable impurities such as harmful substance silicon effectively in absorption effluent.In addition, containing the hydrogen-oxygen in ammonia-nitrogen sewage
Change the OH in magnesium-It can be with the NH in sewage4 +In conjunction with generation ammonia, and in the case where stirring or aeration, ammonia is gone out in waste water,
To achieve the purpose that remove ammonia nitrogen.
Preferably, the partial size of polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia is 50-200 mesh.
Preferably, the city domestic sewage dephosphorization agent is used to handle the city domestic sewage that total phosphorus concentration is 1-5mg/L；
When the agent of 10-200ppm sewage dephosphorization is added in 1 ton of sewage, the total phosphorus concentration in sewage can be dropped to 0.4mg/L or less.It adopts
Sewage must can be effectively handled with the city domestic sewage dephosphorization agent, reduces processing cost, processing cost is only 0.05-0.08
Yuan/ton.
In addition, dephosphorization agent not chloride ion-containing, with the potential danger of its treated in no way sewage generates dioxin, that is, pacify
It is complete and environmentally friendly.
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are ground respectively, is ground to the partial size model of each raw material
Enclose 50-200 mesh；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, stir 2-4 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 0.8-1.5 hours；
4) magnesia after grinding is put into stirred tank again, continues stirring 1-1.5 hours, obtains city domestic sewage and remove
Phosphorus agent.
Preferably, the grinding in step 1) carries out in grinder, and the grinding condition control of grinder is as follows: revolving speed R≤
30r/min, grinding room temperature are 10-50 DEG C.
Preferably, step 2) -4) in, the stirring condition control in stirred tank is as follows: mixing speed R≤10r/min, stirring
10-40 DEG C of temperature.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) city domestic sewage is collected into city domestic sewage treatment plant by municipal pipeline, except the solid in decontaminated water is miscellaneous
Object；
2) total phosphorus concentration of city domestic sewage is adjusted to certain range, in the city life after aerobic tank post-processes
Dephosphorization agent is dosed in sewage living；
3) when the coloration of the city domestic sewage top clear water in secondary settling tank reaches 6 or more, COD/SS/BOD/ is detected
After the indices such as TP/ ammonia nitrogen are qualified, by the disinfection upper back stillness of night can direct emission, the activated sludge portion of bottom of pond portion will be handled
Divide circulation meeting sludge-tank, is transported outward after the filters pressing of part.
Preferably, in step 2), the total phosphorus concentration for adjusting city domestic sewage is 1-5mg/L；City domestic sewage dephosphorization
The additive amount of agent is 10-200ppm.When using city domestic sewage dephosphorization agent, first dephosphorization agent is added in acidproof dissolving tank,
It is stirred while adding tap water, is made into the aqueous solution that concentration is 10-30%, then carries out continuous uniform throwing with metering pump again
Add；Generally, the additive amount of dephosphorization agent is about 10-200ppm (i.e. 10-200 g tons of sewage), and specifically used amount can be with according to sewage
Middle phosphorus content is determined by experiment.This medicament will be added before secondary settling tank after oxidation ditch.
Preferably, water quality of the step 2) according to city domestic sewage adds pH adjusting agent, makes the pH of city domestic sewage
3-11, it is preferred that the pH for adjusting city domestic sewage is 6-9.
City domestic sewage dephosphorization agent pH value adaptation range of the invention is larger, but sometimes for the water according to sanitary sewage
Matter adds pH adjusting agent, and common pH adjusting agent has sodium hydroxide and sulfuric acid.
According to the water quality of sewage, can also assist adding a small amount of cationic polyacrylamide solution (PAM) and flocculate sinking
Form sediment, the specific method is as follows: the pH for adjusting phosphorus-containing wastewater is 7-9, takes appropriate city domestic sewage dephosphorization agent that tap water stirring is added
After dissolution, which is dosed in phosphorus-containing wastewater, and is continuously stirred about 10 minutes, adjusts pH value 7-8, then
A small amount of cationic polyacrylamide solution (PAM) flocculation sedimentation is added, after standing about 30 minutes.
The each raw material component of city domestic sewage dephosphorization agent of the invention plays mutually in preparation process and application process
The effect of collaboration, to effectively improve the sewage treatment capacity of sewage dephosphorization agent.4 Zhong Zu branches in grinding and whipping process
Generating unit differentiation, which is learned, answers, and is not simple grinding, stirring, for example, magnesium ion sulfuric acid can react generation magnesium sulfate, sulphur with ion
Sour magnesium hydrolysis can generate magnesium hydroxide.And magnesia had not only played the role of pH value buffering, but also played and generate magnesium hydroxide
Effect.In addition, calcium sulfate uses the calcium sulfate whiskers of high-specific surface area, to the adsorption capacities such as calcium phosphate, magnesium phosphate pole
By force, rapid flocculation precipitates under the synergy such as aluminium hydroxide, iron hydroxide, magnesium hydroxide, to reach dephosphorization purpose.
The present inventor is prepared for city domestic sewage dephosphorization of the invention through overtesting, using rationally unique formula
Agent effectively the harmful substance in absorption effluent can reduce the phosphorus content of sewage, the total phosphorus concentration of sewage is made to drop to 0.4mg/L
Below.Each component is mutually coordinated to play synergistic effect, and one-component dosage can not also make in city domestic sewage greatly again
Total phosphorus concentration dropped to 0.5mg/L or less (national grade one discharge standard) from 1-5mg/L, and the present invention by four kinds of components by certain
Ratio grinding be stirred after, can mutually be catalyzed, influence each other, synergy, reach dephosphorization, except COD, except ammonia nitrogen, except SS, remove
A variety of purposes such as heavy metal.Inventor has found the sanitary sewage dephosphorization agent suitable for city domestic sewage processing through overtesting
Factory, phosphor-removing effect highly significant.
It is removed the beneficial effects of the present invention are: the present invention prepares efficient city domestic sewage using safe and non-toxic raw material
Phosphorus agent, the sanitary sewage dephosphorization agent is environmentally friendly, nontoxic, not chloride ion-containing, without secondary pollution；Excellent cost performance；Each raw material easily obtain
, production process it is simple, the three wastes such as no waste water, exhaust gas, useless solid generate；The pH wide adaptation range of sewage dephosphorization agent, pH value of sewage water
It can be used within the scope of 3-11；With dephosphorization, except ammonia nitrogen, except COD, except the multiple functions such as SS, removing heavy metals, flocculation；It is applicable in
It is handled in the city domestic sewage of raw water total phosphorus concentration 1-5mg/L；Processing sewage effect is obvious, and additive amount 10-200ppm can
Total phosphorus concentration is dropped into 0.4mg/L or less；City domestic sewage dephosphorization processing cost is only 0.05-0.08 yuan/ton, is effectively reduced
The processing cost of sewage.
Specific embodiment
Embodiment 1
A kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are put into grinder respectively and are ground, is ground to each
80 mesh of particle size range of raw material, wherein the grinding condition control of grinder is as follows: revolving speed R is 30r/min, and grinding room temperature is 10
℃；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, speed of agitator R processed be 10r/min,
10 DEG C of kettle whipping temp, uniform stirring 2 hours of control；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 0.8 hour；
4) magnesia after grinding is put into stirred tank again, continues stirring 1 hour, obtains city domestic sewage dephosphorization
Agent.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) it collects city domestic sewage to be put into processing pond, removes group's sundries in city domestic sewage；
2) total phosphorus concentration to the total phosphorus concentration for adjusting city domestic sewage is 1-5mg/L, is 200ppm (200 by additive amount
G ton) it is added into city domestic sewage dephosphorization agent, stirring or aeration fill city domestic sewage dephosphorization agent with city domestic sewage
Divide mixing；
3) 3 hours are stood, it is when the coloration of sewage top clear water reaches 6 or more, the top stillness of night in processing pond is direct
Discharge, is used to prepare organic fertilizer for the activated sludge for handling bottom of pond portion.
Embodiment 2
A kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are put into grinder respectively and are ground, is ground to each
100 mesh of particle size range of raw material, wherein the grinding condition control of grinder is as follows: revolving speed R is 25r/min, and grinding room temperature is
20℃；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, speed of agitator R processed be 8r/min, control
15 DEG C of kettle whipping temp processed, uniform stirring 2.5 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 0.8 hour；
4) magnesia after grinding is put into stirred tank again, continues stirring 1.5 hours, obtains city domestic sewage dephosphorization
Agent.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) it collects city domestic sewage to be put into processing pond, removes group's sundries in city domestic sewage；
2) total phosphorus concentration to the total phosphorus concentration for adjusting city domestic sewage is 1-5mg/L, is 100ppm (100 by additive amount
G ton) it is added into city domestic sewage dephosphorization agent, stirring or aeration fill city domestic sewage dephosphorization agent with city domestic sewage
Divide mixing；
3) 2.5 hours are stood, it is when the coloration of sewage top clear water reaches 6 or more, the top stillness of night in processing pond is straight
Run in and put, the activated sludge for handling bottom of pond portion is used to prepare organic fertilizer.
Embodiment 3
A kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are put into grinder respectively and are ground, is ground to each
120 mesh of particle size range of raw material, wherein the grinding condition control of grinder is as follows: revolving speed R is 30r/min, and grinding room temperature is
20℃；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, speed of agitator R processed be 8r/min, control
20 DEG C of kettle whipping temp processed, uniform stirring 3 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 1 hour；
4) magnesia after grinding is put into stirred tank again, continues stirring 1 hour, obtains city domestic sewage dephosphorization
Agent.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) it collects city domestic sewage to be put into processing pond, removes group's sundries in city domestic sewage；
2) adjust city domestic sewage total phosphorus concentration to total phosphorus concentration be 1-5mg/L, by additive amount for 50ppm (50 grams/
Ton) it is added into city domestic sewage dephosphorization agent, stirring or aeration keep city domestic sewage dephosphorization agent and city domestic sewage abundant
Mixing；
3) 2 hours are stood, it is when the coloration of sewage top clear water reaches 6 or more, the top stillness of night in processing pond is direct
Discharge, is used to prepare organic fertilizer for the activated sludge for handling bottom of pond portion.
Embodiment 4
A kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are put into grinder respectively and are ground, is ground to each
150 mesh of particle size range of raw material, wherein the grinding condition control of grinder is as follows: revolving speed R is 15r/min, and grinding room temperature is
40℃；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, speed of agitator R processed be 5r/min, control
40 DEG C of kettle whipping temp processed, uniform stirring 3 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 1.5 hours；
4) magnesia after grinding is put into stirred tank again, continues stirring 1 hour, obtains city domestic sewage dephosphorization
Agent.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) it collects city domestic sewage to be put into processing pond, removes group's sundries in city domestic sewage；
2) adjust city domestic sewage total phosphorus concentration to total phosphorus concentration be 1-5mg/L, by additive amount for 20ppm (20 grams/
Ton) it is added into city domestic sewage dephosphorization agent, stirring or aeration keep city domestic sewage dephosphorization agent and city domestic sewage abundant
Mixing；
3) 2 hours are stood, it is when the coloration of sewage top clear water reaches 6 or more, the top stillness of night in processing pond is direct
Discharge, is used to prepare organic fertilizer for the activated sludge for handling bottom of pond portion.
The city domestic sewage dephosphorization agent of embodiment 1-5 preparation is detected, city domestic sewage obtained by embodiment 1-5 removes
The physical properties of phosphorus agent meet following index
Embodiment 5
A kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
A kind of preparation method of city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are put into grinder respectively and are ground, is ground to each
200 mesh of particle size range of raw material, wherein the grinding condition control of grinder is as follows: revolving speed R is 10r/min, and grinding room temperature is
30℃；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, speed of agitator R processed be 5r/min, control
30 DEG C of kettle whipping temp processed, uniform stirring 4 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 1 hour；
4) magnesia after grinding is put into stirred tank again, continues stirring 1.2 hours, obtains city domestic sewage dephosphorization
Agent.
A method of city domestic sewage is handled using city domestic sewage dephosphorization agent, comprising the following steps:
1) it collects city domestic sewage to be put into processing pond, removes group's sundries in city domestic sewage；
2) adjust city domestic sewage total phosphorus concentration to total phosphorus concentration be 1-5mg/L, by additive amount for 10ppm (10 grams/
Ton) it is added into city domestic sewage dephosphorization agent, stirring or aeration keep city domestic sewage dephosphorization agent and city domestic sewage abundant
Mixing；
3) 1.5 hours are stood, it is when the coloration of sewage top clear water reaches 6 or more, the top stillness of night in processing pond is straight
Run in and put, the activated sludge for handling bottom of pond portion is used to prepare organic fertilizer.
The city domestic sewage dephosphorization agent of embodiment 1-5 preparation is detected, city domestic sewage obtained by embodiment 1-5 removes
The physical properties of phosphorus agent meet following index
The physical property of the city domestic sewage dephosphorization agent of 1 embodiment 1-5 of table preparation
| Detection project | Detection method | Testing result | |
| 1. | Appearance | Range estimation | It is light yellow |
| 2. | PH value | 10% aqueous solution | 4.0±1 |
| 3. | Fineness (mesh) | Standard screen | 50-200 |
| 4. | Solid content (%) | GB/T 23986 | ≤ 98% |
Result using the processing sewage of city domestic sewage dephosphorization agent prepared by embodiment 1-5 is as shown in table 2 below.
City domestic sewage dephosphorization agent prepared by 2 embodiment 1-5 of table handles sewage effect
Claims (5)
1. a kind of city domestic sewage dephosphorization agent, which is characterized in that the following raw material including weight percent:
The calcium sulfate is calcium sulfate crystal whiskers；
Polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia partial size be 50-200 mesh；
The city domestic sewage dephosphorization agent is used to handle the city domestic sewage that total phosphorus concentration is 1-5mg/L, and urban life is dirty
The pH of water is 3-11；
The preparation method of the city domestic sewage dephosphorization agent, comprising the following steps:
1) polyaluminium sulfate, bodied ferric sulfate, calcium sulfate and magnesia are ground respectively, is ground to the particle size range of each raw material
50-200 mesh；
2) by after grinding polyaluminium sulfate and bodied ferric sulfate be put into stirred tank, stir 2-4 hours；
3) calcium sulfate after grinding is put into stirred tank again, continues stirring 0.8-1.5 hours；
4) magnesia after grinding is put into stirred tank again, continues stirring 1-1.5 hours, obtains city domestic sewage dephosphorization
Agent；
The method of the city domestic sewage dephosphorization agent processing city domestic sewage, comprising the following steps:
1) city domestic sewage is collected into city domestic sewage treatment plant by municipal pipeline, except the solid sundries in decontaminated water；
2) total phosphorus concentration of city domestic sewage is adjusted to certain range, in the urban life dirt after aerobic tank post-processes
Dephosphorization agent is dosed in water；
3) when the coloration of the city domestic sewage top clear water in secondary settling tank reaches 6 or more, after detection indices are qualified, warp
Cross disinfection upper back clear liquid can direct emission, the activated sludge part for handling bottom of pond portion is recycled back to sludge-tank, after the filters pressing of part
Outward transport.
2. city domestic sewage dephosphorization agent according to claim 1, which is characterized in that the city domestic sewage dephosphorization agent
Preparation method in, the grinding in step 1) carries out in grinder, and the control of the grinding condition of grinder is as follows: revolving speed R≤
30r/min, grinding room temperature are 10-50 DEG C.
3. city domestic sewage dephosphorization agent according to claim 1, which is characterized in that the city domestic sewage dephosphorization agent
Preparation method in, step 2) -4) in, the control of stirring condition in stirred tank is as follows: mixing speed R≤10r/min, and stirring is warm
10-40 DEG C of degree.
4. city domestic sewage dephosphorization agent according to claim 1, which is characterized in that the city domestic sewage dephosphorization agent
In the method for handling city domestic sewage, in step 2), the total phosphorus concentration for adjusting city domestic sewage is 1-5mg/L；City is raw
The additive amount of sewage dephosphorization agent living is 10-200ppm.
5. city domestic sewage dephosphorization agent according to claim 1, which is characterized in that the city domestic sewage dephosphorization agent
In the method for handling city domestic sewage, water quality of the step 2) according to city domestic sewage adds pH adjusting agent, makes urban life
The pH of sewage is 3-11.
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| CN109384295A (en) * | 2018-11-16 | 2019-02-26 | 广东慧信环保有限公司 | A kind of environmental protection water purification agent and preparation method thereof |
| CN109399773B (en) * | 2018-11-28 | 2021-08-27 | 佛山科学技术学院 | Composite coagulant for basin sewage treatment with high phosphorus content |
| CN110143659A (en) * | 2019-05-25 | 2019-08-20 | 天津金辰博科环保科技发展有限公司 | A kind of sewage denitrification and dephosphorization agent and preparation method thereof |
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