Nitrogen and phosphorus removal water treatment device and treatment method thereof

A technology of water treatment device and sewage treatment method, which is applied in the fields of special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. effect of ability

Active Publication Date: 2020-04-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not rely on organic carbon sources and has a certain phosphorus removal effect. However, after the reactor has been in operation for a period of time, the surface of the iron ore will be passivated, resulting in significantly worse nitrogen and phosphorus removal effects.

Method used

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  • Nitrogen and phosphorus removal water treatment device and treatment method thereof
  • Nitrogen and phosphorus removal water treatment device and treatment method thereof
  • Nitrogen and phosphorus removal water treatment device and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The experimental device adopted by the sewage treatment method of the present invention is as figure 1 As shown, the water treatment device of the present invention includes a biofilter 1 and a nitrification reaction tank 10; a pyrite filler 6 is filled in the biofilter 1, and an activated sludge microbial film is attached to the surface of the pyrite filler 6; the biofilter 1 is equipped with water inlet I4, water outlet I5 and water outlet II7 (the water inlet I4, water outlet I5 and water outlet II7 are all equipped with valves), and the water inlet I4 of biological filter 1 is connected to two water inlet branches. The water inlet branch passes the sewage to be treated into the biofilter 1 through the water inlet pump I3, and the second water inlet branch connects with the nitrification reaction liquid storage tank 14 through the water inlet pump I3, and the first water inlet branch and the second water inlet branch are both There are switches (respectively switch 2...

Embodiment 2

[0036] The sewage treatment method of the present embodiment, the basic process is the same as that of the embodiment 1, the difference is that in the step 1 of the present embodiment, the influent NO 3 - -N concentration is 21.88mg / L, PO 4 3- -P concentration is 12.31mg / L, the hydraulic retention time of sewage to be treated in biofilter 1 is 48h, the result is as follows image 3 Shown, the measured water NO 3 - -N and PO 4 3- -P concentrations were 8.67mg / L and 6.15mg / L, respectively. After biofilter 1 has been in operation for 60 days, the removal rate of nitrate nitrogen in biofilter 1 is only 12.49%. At this time, the surface of pyrite filler is passivated; in step 2, the concentration of ammonia nitrogen in ammonia nitrogen wastewater is 47.89mg / L, and the nitrification reaction The hydraulic retention time of ammonia nitrogen wastewater in pool 2 is 24h, and the pH of the effluent is 5.2; in step 3, pickling pyrite is soaked in an acid solution with a pH of 5.2 ...

Embodiment 3

[0038] The sewage treatment method of the present embodiment, the basic process is the same as the embodiment 1, the difference is that in the step 2 of the present embodiment, the concentration of ammonia nitrogen in the ammonia nitrogen wastewater is 50mg / L, and the hydraulic retention time of the ammonia nitrogen wastewater in the nitrification reaction tank 2 is 72h, The pH of the effluent was 4.9; in step 3, pickling the pyrite was soaked in an acid solution with a pH of 4.9 for 24 hours, and 1.14 g of precipitate was recovered from the washing liquid recovery pool 8, and the recovery rate of total phosphorus was 66.22%.

[0039] The sewage treatment process of the present invention first adopts pyrite autotrophic denitrification to simultaneously remove nitrogen and phosphorus in water; then utilizes nitrification reaction to produce acid, and finally utilizes the acid solution generated by nitrification reaction to carry out pickling regeneration on the passivated pyrite ...

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Abstract

The invention discloses a nitrogen and phosphorus removal water treatment device and a method for applying the nitrogen and phosphorus removal water treatment device for advanced nitrogen and phosphorus removal of sewage. The device comprises a biological filter tank and a nitration reaction tank, the biological filter is filled with pyrite filler, and a microbial film is attached to the surface of the pyrite filler; wherein the biological filter is provided with a water inlet, a water outlet I and a water outlet II, the water inlet of the biological filter is communicated with two water inletbranches, the first water inlet branch inputs sewage to-be-treated into the biological filter through a water inlet pump I, and the second water inlet branch is communicated with the nitration reaction liquid storage tank through the water inlet pump I and is used for washing the filler in the filter. The sewage is discharged from the water outlet I after being treated by the biological filter, and the biological filter is communicated with the flushing fluid recovery tank through the water outlet II; the nitration reaction tank is provided with a water inlet and a water outlet, ammonia nitrogen wastewater is input into the nitration reaction tank through the water inlet pump II, the water outlet of the nitration reaction tank is communicated with the nitration reaction liquid storage tank, and activated sludge is inoculated in the nitration reaction tank and aerated through an air pump.

Description

technical field [0001] The invention relates to a water treatment device for nitrogen and phosphorus removal, and also relates to a sewage treatment method of the water treatment device for nitrogen and phosphorus removal, belonging to the technical field of sewage treatment. Background technique [0002] In recent years, with the rapid development of my country's economy and society, the amount of sewage discharged by human activities has increased significantly, leading to the accumulation of nitrogen and phosphorus in water bodies, resulting in eutrophication of water bodies and deterioration of water quality, affecting natural landscapes and drinking water safety, and threatening the survival of aquatic organisms. This leads to the death of a large number of aquatic organisms due to hypoxia. Therefore, the removal of nitrogen and phosphorus from wastewater has attracted widespread attention. How to improve the removal rate of nitrogen and phosphorus in wastewater discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C01B25/04C02F101/16
CPCC01B25/04C02F3/34C02F2101/105C02F2101/163C02F2305/06
Inventor 叶林黄开龙张良颖张徐祥任洪强
Owner NANJING UNIV
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