Phosphorus removal agent for municipal domestic sewage and method for preparing phosphorus removal agent

A technology of urban domestic sewage and phosphorus removal agent, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem that urban sewage is difficult to meet the national discharge standard, and the packaging and transportation of liquid phosphorus removal agent is inconvenient , Poor phosphorus removal effect, etc., to achieve the effect of improving sewage treatment capacity, excellent water purification effect, and small usage

Active Publication Date: 2017-08-04
徐明慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the phosphorus removal agents commonly used in the market are mainly composed of a single component, the function is relatively single, the phosphorus removal effect is poor, and it is difficult to meet the national discharge standard (≤0.5mg / L) after urban sewage treatment
Some sewage treatment plants also use liquid phosphorus removal agents for sewage treatment, but the packaging and transportation of liquid phosphorus removal agents are inconvenient and corrosive; and liquid phosphorus removal agents contain chloride ions, which are prone to secondary pollution such as waste water during production

Method used

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  • Phosphorus removal agent for municipal domestic sewage and method for preparing phosphorus removal agent
  • Phosphorus removal agent for municipal domestic sewage and method for preparing phosphorus removal agent
  • Phosphorus removal agent for municipal domestic sewage and method for preparing phosphorus removal agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of urban domestic sewage dephosphorization agent is characterized in that, comprises the following raw material of weight percent:

[0035]

[0036] A preparation method of urban domestic sewage phosphorus removal agent, comprising the following steps:

[0037] 1) Put the polyaluminum sulfate, polyferric sulfate, calcium sulfate and magnesium oxide into a grinder and grind them until the particle size range of each raw material is 80 mesh. The grinding conditions of the grinder are controlled as follows: the speed R is 30r / min , the grinding chamber temperature is 10°C;

[0038] 2) Put the ground polyaluminum sulfate and polyferric sulfate into a stirred tank, set the stirring speed R to 10r / min, control the stirring temperature of the tank to 10°C, and stir evenly for 2 hours;

[0039] 3) put the ground calcium sulfate into the stirring kettle again, and continue to stir for 0.8 hours;

[0040] 4) Put the ground magnesia into the stirring tank and continue st...

Embodiment 2

[0046] A kind of urban domestic sewage dephosphorization agent is characterized in that, comprises the following raw material of weight percent:

[0047]

[0048]

[0049] A preparation method of urban domestic sewage phosphorus removal agent, comprising the following steps:

[0050] 1) Grind polyaluminum sulfate, polyferric sulfate, calcium sulfate and magnesium oxide in a grinder respectively until the particle size range of each raw material is 100 mesh, and the grinding conditions of the grinder are controlled as follows: the speed R is 25r / min , the grinding chamber temperature is 20°C;

[0051] 2) Put the ground polyaluminum sulfate and polyferric sulfate into a stirred tank, set the stirring speed R to 8r / min, control the stirring temperature of the tank to 15°C, and stir evenly for 2.5 hours;

[0052] 3) put the ground calcium sulfate into the stirring kettle again, and continue to stir for 0.8 hours;

[0053] 4) Put the ground magnesia into the stirring tank a...

Embodiment 3

[0059] A kind of urban domestic sewage dephosphorization agent is characterized in that, comprises the following raw material of weight percent:

[0060]

[0061] A preparation method of urban domestic sewage phosphorus removal agent, comprising the following steps:

[0062] 1) Put the polyaluminum sulfate, polyferric sulfate, calcium sulfate and magnesium oxide into a grinder and grind them until the particle size range of each raw material is 120 mesh. The grinding conditions of the grinder are controlled as follows: the speed R is 30r / min , the grinding chamber temperature is 20°C;

[0063] 2) Put the ground polyaluminum sulfate and polyferric sulfate into a stirred tank, set the stirring speed R to 8r / min, control the stirring temperature of the tank to 20°C, and stir evenly for 3 hours;

[0064] 3) put the ground calcium sulfate into the stirring kettle again, and continue to stir for 1 hour;

[0065] 4) Put the ground magnesia into the stirring tank and continue sti...

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Abstract

The invention discloses a phosphorus removal agent for municipal domestic sewage. The phosphorus removal agent comprises, by weight, 20-70% of polyaluminium sulfate, 20-70% of polyferric sulfate, 0.1-5% of calcium sulfate and 0.1-5% of magnesium oxide. The phosphorus removal agent has the advantages that the efficient phosphorus removal agent for the municipal domestic sewage is prepared from safe and non-toxic raw materials, is environmentally friendly, is non-toxic and is free of chlorine ions or secondary pollution; the phosphorus removal agent is excellent in cost performance; the various raw materials are easily available, production procedures are simple, and waste such as wastewater, waste gas and waste solids can be prevented; the phosphorus removal agent for the sewage is wide in pH (potential of hydrogen) application range and can be used for the sewage with pH values in the ranges of 3-11; the phosphorus removal agent has diversified functions such as phosphorus, ammonia nitrogen, COD (chemical oxygen demand), SS (suspended substances) and heavy metal removal functions and flocculation functions; the phosphorus removal agent is applicable to treating the municipal domestic sewage with the original water total phosphorus concentration of 1-5 mg / L; obvious effects of treating the sewage can be realized, and the total phosphorus concentration can be reduced and is lower than 0.4 mg / L by the aid of 10-200 ppm of phosphorus removal agent; the phosphorus removal treatment cost for the municipal domestic sewage is only 0.05-0.08 yuan / ton, and accordingly the sewage treatment cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a dephosphorization agent for urban domestic sewage and a preparation method thereof, and a method for treating urban domestic sewage with the dephosphorization agent for urban domestic sewage. Background technique [0002] Urban domestic sewage is mainly the discharge water produced by various kitchen water, washing water and toilet water used in human life. It is mainly non-toxic inorganic salts, containing a large amount of solid suspended matter, chemically or biologically degradable soluble or Colloidal dispersion of organic matter, nitrogen-containing compounds, phosphate, potassium, sodium and heavy metal ions, fungal biota, etc. If it is discharged into natural water without treatment or with insufficient treatment, it will lead to eutrophication and accumulation of toxicity in the water, leading to the deterioration of the ecological environment. In recent years, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F9/14C02F101/10C02F101/16
CPCC02F1/281C02F1/50C02F1/5236C02F1/66C02F3/02C02F9/00C02F2101/105C02F2101/16
Inventor 徐明慧
Owner 徐明慧
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