Apparatus used for deep denitrification and toxicity reduction of sewage and operation method therefor

A technology for deep denitrification and sewage treatment, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. The effect of reducing the amount of production, good application prospects, and cost reduction

Active Publication Date: 2018-12-07
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing sewage deep denitrification and toxicity reduction equipment, such as complex treatment process, cumbersome operation, low ozone utilization rate, and poor treatment effect, and provide a sewage deep denitrification and toxicity reduction equipment. Device and method of operation

Method used

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  • Apparatus used for deep denitrification and toxicity reduction of sewage and operation method therefor

Examples

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Effect test

Embodiment 1

[0027] Such as figure 1As shown, a device for deep denitrification and toxicity reduction of sewage, including a chemical tank 1, a regulating tank 2, a biological aerated filter 3, an ozone reaction tank 4, an ozone generation and diffusion device 5, and a denitrification biological filter 6 The dosing pipe of the medicament tank 1 goes deep into the adjustment tank 2, and the adjustment tank 2 is connected to the bottom of the biological aerated filter 3 through pipelines, and a water pump 35 is arranged between them; the inside of the biological aerated filter 3 is sequentially from top to bottom A sump 7, a filter material layer 8, a supporting layer 9, and an aeration pipe 10 are provided, wherein the filter material layer 8 is a ceramsite layer with a thickness of 20 cm, a particle size of 5 mm, and a void ratio greater than 50%. Layer 19 is a cobblestone layer with a thickness of 10cm and a steam-to-water ratio of 6. Continuous aeration makes the dissolved oxygen in the...

Embodiment 2

[0041] In this example, deep denitrification and toxicity reduction treatment are performed on tetracycline-containing antibiotic wastewater. Its basic operation is the same as embodiment 1, and now the differences are briefly described as follows:

[0042] (1) Wherein, the filter material layer 8 is a ceramsite layer with a thickness of 20cm, a particle diameter of 5mm, and a void ratio greater than 50%, and the supporting layer-9 is a cobblestone layer with a thickness of 10cm and an air-water ratio of 15. Gas so that the dissolved oxygen in the filter is 5mg / L.

[0043] (2) The filler layer 20 is a ceramsite layer with a particle size of 8mm and a porosity of 50%. The supporting layer 21 is a cobblestone layer with a thickness of 10cm.

[0044] (3) liquid phase catalyst comprises according to weight percent: 25.7% hydrogen peroxide, 4.1% non-foaming surfactant, 3.5% water-based dispersant, 9.8% water-soluble chitosan, surplus is pure water, and hydrogen peroxide can be use...

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Abstract

The invention discloses an apparatus used for deep denitrification and toxicity reduction of sewage and an operation method therefor. The apparatus includes a regulation tank, a biological aerated filter, an ozone reaction tank, an ozone generation and diffusion apparatus, and a denitrification biological filter. In the invention, firstly, a part of persistent organic pollutants and ammonia nitrogen are degraded by microorganisms in the biological aerated filter, thus reducing the use amount of ozone in the following ozone reaction tank and reducing cost; then residual toxic persistent organicpollutants are degraded by means of ozone; then the persistent organic pollutants and nitrate nitrogen are removed further by means of treatment in coupled reactors of an electrolytic tank and the denitrification biological filter. The apparatus can achieve excellent deep denitrification and toxicity reduction effects and has excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a device and operation method for deep denitrification and toxicity reduction of sewage. Background technique [0002] At present, most of the sewage still has a certain amount of nitrate nitrogen and refractory organic pollutants after general secondary treatment. The accumulation of nitrate nitrogen after a certain period of time after entering the water body may cause algal blooms, red tides and other phenomena, which are serious Affect the water body environment, leading to the deterioration of the natural water body environment and the reduction of the number of fish and shrimp; non-biodegradable organic pollutants may have strong biological toxicity, which will affect the survival of microorganisms in the receiving water body, and may also affect the survival of algae and animals in the water. Cellular structures, which lead to biological variation, hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/30
CPCC02F9/00C02F2101/16C02F2101/30C02F3/30C02F3/005C02F1/78C02F1/725C02F2209/23C02F2301/043C02F1/66C02F2101/38C02F2209/40C02F2305/04C02F3/06C02F3/305Y02W10/10C02F3/107C02F2101/163C02F2201/782C02F2201/784C02F2209/235C02F2209/44C02F2303/16B01F23/233B01F23/238
Inventor 黄辉高依林任洪强张徐祥彭冲
Owner NANJING UNIV
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