A wastewater treatment method for synchronous denitrification, phosphorus and ammonia nitrogen removal

A simultaneous nitrogen and phosphorus removal and wastewater treatment technology, applied in the direction of anaerobic digestion and treatment, can solve the problems of limited treatment efficiency, high treatment cost, single treatment object, etc., achieve strong phosphorus removal effect and increase the effect of utilization value

Active Publication Date: 2019-12-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art that the treatment efficiency of wastewater containing ammonia nitrogen, nitrate nitrogen and phosphate is limited, the treatment object is single, and the treatment cost is high, the present invention provides a synchronous A low-cost treatment method for nitrogen and phosphorus removal and ammonia nitrogen removal

Method used

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  • A wastewater treatment method for synchronous denitrification, phosphorus and ammonia nitrogen removal
  • A wastewater treatment method for synchronous denitrification, phosphorus and ammonia nitrogen removal
  • A wastewater treatment method for synchronous denitrification, phosphorus and ammonia nitrogen removal

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Embodiment 1

[0036] A wastewater treatment method for synchronous denitrification, dephosphorization and ammonia nitrogen removal of the present invention, its implementation method is: (1) crush pyrrhotite until the particle size is 20-60 mesh, and expose the pyrrhotite by water washing or pickling The fresh surface is ready for use; (2) the magnesite with a particle size of 20-60 meshes is washed with water for use; (3) the pyrrhotite and magnesite are mixed and evenly added to the reaction vessel according to a certain mass ratio; (4) Add waste water containing ammonia nitrogen, nitrate nitrogen and phosphate into the reaction vessel; (5) Add a certain volume of sulfur autotrophic denitrifying bacteria culture solution into the reaction vessel; (6) Place the reaction vessel in anaerobic Or anoxic environment, after a few days of reaction, the wastewater treatment is completed.

[0037] Such as Figure 1~3 Shown embodiment 1, present embodiment 1 gets pyrrhotite 9g, magnesite 3g and put...

Embodiment 2

[0040] The wastewater treatment steps of synchronous denitrification, dephosphorization, and ammonia nitrogen removal in Example 2 are basically the same as in Example 1, the only difference being: take 20 g of pyrrhotite and 7 g of magnesite into the reaction vessel, add NO 3 - -N 80mg / L, PO 4 3- -P 25mg / L, ammonia nitrogen 15mg / L wastewater 100mL, then add 4mL sulfur autotrophic denitrifying bacteria culture solution, blow nitrogen to deoxygenate, then cover and seal. The nitrate nitrogen was completely removed at 12 days, the phosphate phosphorus was completely removed at 6 days, and the ammonium nitrogen was completely removed at 11 days.

Embodiment 3

[0042] The waste water treatment steps of synchronous denitrification, dephosphorization and ammonia nitrogen removal of the present embodiment 3 are basically the same as those of the embodiment 1, the only difference being that the present embodiment 3 takes 7 g of pyrrhotite and 4 g of magnesite and puts them into the reaction vessel. Add NO 3 - -N 36mg / L, PO 4 3- - 40mL of waste water with P13mg / L and ammonia nitrogen 9mg / L, then add 3.4mL sulfur autotrophic denitrifying bacteria culture solution, blow nitrogen to remove oxygen, and then cover and seal. The nitrate nitrogen was completely removed at 7 days, the phosphate phosphorus was completely removed at 5 days, and the ammonia nitrogen was completely removed at 10 days.

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Abstract

The invention discloses a waste water treatment method for removing ammonia and nitrogen by simultaneous phosphorus and nitrogen removal and belongs to the technical field of sewage treatment. The method comprises the following steps: uniformly mixing pyrrhotite with magnesite in a certain mass ratio and adding the mixture into a reaction container; then adding waste water containing ammonia and nitrogen, nitrate nitrogen and phosphate into the reaction container; then adding a sulfur-based autotrophic denitrifying bacteria culture solution into the reaction container in a certain volume; putting the reaction container in an anaerobic environment; and after reactions for many days, completing treatment of the wastewater. The pyrrhotite is taken as a sulfur source for the sulfur-based autotrophic denitrifying bacteria and magnesite is taken as a carbon source for autotrophic denitrification to remove nitrogen. The magnesite is utilized, so that magnesium ions are released and form a magnesium ammonium phosphate precipitate with ammonium ions and phosphate radicals; the pyrrhotite is utilized, so that ferrous ions and iron ions are released and form a precipitate with phosphate radicals, and therefore, phosphorus and ammonia and nitrogen are removed while biological removal of nitrogen is performed. The method is excellent in effect, low in cost and suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a sewage treatment method utilizing pyrrhotite and magnesite to simultaneously remove nitrogen, phosphorus, and ammonia nitrogen. Background technique [0002] Pyrrhotite is one of the most widely distributed sulfide minerals in nature. Its industrial application is mainly to produce sulfuric acid, but it also produces a large amount of acidic wastewater, which leads to serious local environmental problems. Magnesite is a kind of magnesium carbonate mineral, which is mainly used as refractory material, building material raw material and chemical raw material. [0003] In recent years, pyrrhotite has been developed and researched by scholars as a new type of environmentally friendly material, mainly focusing on the denitrification and phosphorus removal of wastewater and the treatment of heavy metals. Among them, pyrrhotite has high reactivity due to poin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 李睿华葛志斌王卫肖才林沈建华张永威李甫昌穆哈买提·马友才邵奇
Owner NANJING UNIV
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