Waste water nitrogen and phosphorus removal apparatus and waste water treatment method

A technology for denitrification, dephosphorization, and wastewater, which is applied in water/sewage treatment, chemical instruments and methods, and multi-stage water/sewage treatment. In order to achieve high phosphate removal rate, improve sewage purification efficiency, and reduce pollution exchange

Pending Publication Date: 2018-12-18
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For the existing single denitrification system, the denitrification rate is easily affected by nitrite (NO 2 - ) accumulation, sulfate reduction, and pH and other factors, the carbon source (DOC) or nitrite (NO 2 - ) is excessive; while the simultaneous denitrification and phosphorus removal technology is difficult to simultaneously improve the denitrification and phosphorus removal capabilities, resulting in limited denitrification effect, low phosphorus removal rate, various unit structures, complex process, large floor area, and high processing costs. question

Method used

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  • Waste water nitrogen and phosphorus removal apparatus and waste water treatment method
  • Waste water nitrogen and phosphorus removal apparatus and waste water treatment method
  • Waste water nitrogen and phosphorus removal apparatus and waste water treatment method

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment 1 adopts such as figure 1 The shown denitrification and phosphorus removal device treats the drainage of an agricultural floor tile, which includes a sewage pool 1, a denitrification column 2, a phosphorus filter column 3, a water inlet pipe 14 and a connecting pipe 20; the lower part of the denitrification column 2 has a first-stage inlet The water outlet 6 has a first-level water outlet 15 on the top; a second-level water inlet 16 and a second-level water outlet 13 are respectively arranged on the opposite sides of the lower part of the phosphorus filter column 3; The primary water inlet 6 is connected; the secondary water inlet 16 at the bottom of the phosphorus filter column 3 is connected with the primary water outlet 15 at the top of the denitrification column 2 through a connecting pipe 20; the water inlet pipe 14 is provided with a water inlet peristaltic pump 4 and The valve switch 5 ; the connecting pipe 20 is provided with a peristaltic pump 1...

Embodiment 2

[0058] This embodiment is further improved on the basis of Embodiment 1.

[0059] The primary water outlet 15 at the top of the denitrification column 2 is provided with a stainless steel filter screen 10 with a pore size of 25 mesh. The sawdust 9 filled in the denitrification column 2 has a particle size of 4-8mm, and is formed by soaking in 0.1mol / L NaOH for 12 hours, washing with water to neutrality, and air-drying; the filling height of the sawdust 9 accounts for 90% of the height of the denitrification column 2 %, the total porosity filled is 68%.

[0060] The particle size of the acid mine drainage residue 12 filled in the phosphorus filter column 3 is 0.6-4.0 cm, the filling height accounts for 80% of the height of the phosphorus filter column 3 , and the filling total porosity is 60%.

[0061] The specific steps of using the device of this embodiment to remove nitrogen and phosphorus from wastewater are as follows:

[0062] A. Build above-mentioned denitrification an...

Embodiment 3

[0070] This embodiment is further improved on the basis of embodiment 2.

[0071] The wood chips 9 filled in the denitrification column 2 have a particle size of 5-7mm, and are soaked in 0.3mol / L NaOH for 36 hours, washed with water until neutral, and air-dried; the filling height of the wood chips 9 accounts for 95% of the height of the denitrification column 2. %, the total porosity is 78%.

[0072] The acid mine drainage residue 12 filled in the phosphorus filter column 3 has a particle size of 1.6 to 3.4 cm, the filling height accounts for 85% of the height of the phosphorus filter column 3, and the total porosity of the filling is 80%;

[0073] The specific steps of using the device of this embodiment to remove nitrogen and phosphorus from wastewater are as follows:

[0074] A. Build above-mentioned denitrification and dephosphorization device, and under the hydraulic retention time is 7h, sawdust 9 is carried out 2 times of leaching; Before experiment, acid mine drainag...

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Abstract

The invention discloses a waste water nitrogen and phosphorus removal apparatus and a waste water treatment method, which belongs to the field of sewage treatment. The waste water nitrogen and phosphorus removal apparatus comprises a denitrification column filled with sawdust and a phosphorus filtering column filled with acidic mine drainage residues. The sawdust denitrification column is coupledwith the acidic drainage residue phosphorus filter columns, the heterotrophism-autrophism denitrification nitrogen removal technology and biology-chemical phosphorus removal technology are integrated,the nitrogen and phosphorus removal treatment is performed for the point-source breeding waste water comprising nitrogen and phosphorus and scattered agricultural floor tile discharged water, and a purpose of efficiently purifying the water can be achieved. The waste water nitrogen and phposphorus removal apparatus has the advantages of simple structure, reasonable design, small floor occupationarea, low material cost and significant purification effect.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to a device and method for denitrifying and dephosphorizing waste water by using the coupling technology of a denitrification column and a phosphorus filter column. Background technique [0002] Under today's intensive agricultural model, planting and aquaculture are developing rapidly, followed by point source aquaculture wastewater rich in a large amount of nitrogen and phosphorus pollutants and scattered agricultural floor tile drainage, which has become an important part of water pollution treatment. A new source of pollution that cannot be ignored. Excessive discharge of nitrogen and phosphorus will cause eutrophication of the water body, resulting in excessive algae reproduction, thereby consuming dissolved oxygen in the water body, secreting a large amount of algal toxins, causing the death of aquatic organisms, reducing the stability and diversity of aquatic b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/58C02F3/286C02F3/34C02F2101/105C02F2101/163C02F2203/006
Inventor 汪龙眠张爱国周颖张毅敏彭福全徐斌孔明杨飞
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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