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A wastewater treatment method for nitrogen and phosphorus removal

A waste water treatment, denitrification and phosphorus removal technology, applied in the direction of multi-stage water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. The effect of small area, low cost and simple equipment maintenance

Active Publication Date: 2020-01-17
ZHEJIANG TAOHUAYUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the traditional activated sludge treatment process cannot treat the existing total amount of wastewater

Method used

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  • A wastewater treatment method for nitrogen and phosphorus removal
  • A wastewater treatment method for nitrogen and phosphorus removal
  • A wastewater treatment method for nitrogen and phosphorus removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method for phosphorus removal adsorbent, specifically as follows:

[0046] Step 1. Mixing activated carbon and chitosan with a mass ratio of 1:a evenly to obtain an activated carbon-chitosan mixture, 1≤a≤7.

[0047] Step 2, adding the activated carbon-chitosan mixture of step 1 gained according to the solid-liquid ratio of 3 (g): 110 (ml) is dissolved in the acetic acid solution of 1.2% by volume concentration; Promptly obtains the absorption core stoste after dissolving completely.

[0048]Step 3, drop the adsorption core stock solution obtained in step 2 into the alkaline inorganic fixative solution drop by drop with a push needle of a micropump, and crystallize to obtain spherical granular adsorbent particles. The mass ratio of the adsorption core stock solution added to the alkaline inorganic fixative solution to the alkaline inorganic fixative solution is 1:25. The alkaline inorganic fixative is a mixed solution of absolute ethanol and aqueous sodium...

Embodiment 2

[0064] Such as figure 2 As shown, a nitrogen and phosphorus removal device includes a water inlet unit, a reaction unit and a water outlet unit arranged in sequence; the water inlet unit includes a first water tank 1, a first solenoid valve 3, a first on-off valve 4, a first manual Valve 6, the second water tank 2, the second solenoid valve 5, the second on-off valve 8 and the second manual valve 7. The water outlet at the bottom of the first water tank is connected with one end of the first electromagnetic valve 3 and the first manual valve 6 through a three-way pipe. The other ends of the first solenoid valve 3 and the first manual valve 6 are connected to one end of the first on-off valve 4 through a three-way pipe. The water outlet at the bottom of the second water tank is connected with one end of the second solenoid valve 5 and the second manual valve 7 through a three-way pipe. The other ends of the second solenoid valve 5 and the second manual valve 7 are connected ...

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Abstract

The invention discloses a preparation method of a phosphorus-removing adsorbent, a denitrification phosphorus-removing device and a denitrification phosphorus-removing method of the device. The preparation method of the phosphorus-removing adsorbent comprises the following steps: step 1, mixing activated carbon and chitosan; step 2, adding the mixture into an acetic acid solution to be dissolved to obtain an adsorption core raw solution; step 3, adding the adsorption core raw solution dropwise into an alkaline inorganic fixing liquid to obtain adsorbent particles; step 4, rinsing the adsorbentparticles, and performing drying to obtain an adsorption core; step 5, preparing a lanthanum chloride solution, and performing centrifugation to obtain a load liquid; step 6, adjusting the pH of theload liquid by using an alkali solution, and performing nitrogen blowing treatment to obtain a load solution; step 7, adding the adsorption core into the load solution, and performing centrifugation treatment to obtain a combined adsorbent; step 8, rinsing the combined adsorbent, and performing drying; and step 9, performing roasting to obtain the phosphorus-removing adsorbent. The phosphorus-removing adsorbent provided by the invention has a phosphorus removal rate much higher than that of a conventional phosphorus-removing adsorbent.

Description

technical field [0001] The invention belongs to the technical field of water body pollution control, and in particular relates to a wastewater treatment method for nitrogen and phosphorus removal. Background technique [0002] my country is a country that is very scarce in water resources. The per capita water resources are only 1 / 4 of the world's average level, and the temporal and spatial distribution of water resources is extremely uneven, making it difficult to develop and utilize them. In recent decades, with the wide application of chemical fertilizers, pesticides and detergents, nitrogen and phosphorus pollution and water eutrophication have become increasingly serious. The aggravation of nitrogen and phosphorus pollution is mainly manifested in two aspects: the lake water body, the pollution has shown a rapid growth trend in the past 30 years, nitrogen and phosphorus pollution is serious, and the eutrophication problem is prominent; in the ocean, the frequency of red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24C02F1/28C02F9/14C02F101/16
Inventor 许列峰邓小辉
Owner ZHEJIANG TAOHUAYUAN ENVIRONMENTAL PROTECTION TECH
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