High-nitrogen-content organic wastewater deep denitrification device and deep denitrification method

A deep denitrification and organic wastewater technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of low denitrification efficiency, large energy consumption, complex operation, etc. Achieve the effects of improving treatment effect, simple equipment, and improving nitrogen removal efficiency

Inactive Publication Date: 2015-07-15
SAES ENVIRONMENTAL SCI & TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Pre-denitrification requires reflux, which consumes a lot of energy, and the denitrification efficiency is not high; although post-denitrification can guarantee the denitrification efficiency, it needs to add a carbon source, and the operation is complicated and the cost is high

Method used

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  • High-nitrogen-content organic wastewater deep denitrification device and deep denitrification method
  • High-nitrogen-content organic wastewater deep denitrification device and deep denitrification method
  • High-nitrogen-content organic wastewater deep denitrification device and deep denitrification method

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Embodiment 1

[0050] A deep denitrification device for high-nitrogen organic wastewater, the structure of which is as follows figure 1 As shown, it includes raw water regulating tank 2, anaerobic SBR reactor 4, carbon removal SBR reactor 15 and denitrification SBR reactor 21 connected in sequence, and carbon removal SBR reactor 15 is located between anaerobic SBR reactor 2 and denitrification SBR reactor 21. Between the SBR reactors 21, the anaerobic SBR reactor 2 top is connected with the air storage tank 7, and the anaerobic SBR reactor 4 water outlets are connected with the first intermediate water tank 11, the first intermediate water tank 11 and the carbon removal SBR reactor 15 The water inlet is connected, and the water outlet of carbon removal SBR reactor 15 is connected with the second intermediate water tank 18, and the second intermediate water tank 18 is connected with the water inlet of denitrification SBR reactor 21, and described anaerobic SBR reactor 4, carbon removal Both t...

Embodiment 2

[0055] A method for deep denitrification of high-nitrogen organic wastewater, comprising the following steps:

[0056] 1) Add anaerobic activated sludge to high nitrogen-containing organic wastewater, so that the concentration of anaerobic activated sludge reaches 10000mg / L, and the temperature of wastewater treatment is 32°C. When the pH of wastewater drops, the mud and water will be separated for preliminary treatment waste water;

[0057] 2) Add activated sludge to the preliminary treatment wastewater obtained in step 1) to make the concentration of activated sludge reach 4000mg / L, start the carbon removal treatment by aeration, the temperature of the carbon removal treatment wastewater is 20°C, and the dissolved oxygen is 2.5 mg / L, when the wastewater pH changes from increasing to decreasing, the aeration is stopped, the carbon removal treatment is completed, the mud and water are separated, and the wastewater after carbon removal is obtained;

[0058] 3) Add mixed sludge...

Embodiment 3

[0060] Utilize the denitrification device described in embodiment 1 to carry out the method for deep denitrification, the steps are as follows:

[0061] (1) Input high-nitrogen organic wastewater into the anaerobic SBR reactor through the anaerobic SBR inlet pump, and add anaerobic activated sludge to the anaerobic SBR reactor to make the anaerobic activated sludge concentration reach 10050mg / L, anaerobic The drainage ratio of the oxygen SBR reactor is 30%. The temperature of the anaerobic SBR reactor is maintained at 32°C by the temperature control device. The stirrer is turned on for mechanical stirring, and the stirring speed reaches 50rpm. Processes such as methane degrade organic matter in wastewater and generate gas. The generated gas enters the gas storage tank after being filtered. The pH of anaerobic SBR will increase during the process of methane production. When the pH drops, the agitator is turned off. After the mud water is separated, it is discharged into the fir...

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Abstract

The invention relates to a high-nitrogen-content organic wastewater deep denitrification device and denitrification method. The denitrification device comprises a raw water regulating tank, an anaerobic SBR (sequencing batch reactor), a decarbonization SBR and a denitrification SBR which are sequentially connected, wherein the decarbonization SBR is positioned between the anaerobic SBR and denitrification SBR. The device and method can remove more than 90% of COD (chemical oxygen demand) in the high-nitrogen-content organic wastewater, and can remove more than 99% of ammonia nitrogen and more than 95% of total nitrogen in the system, thereby controlling the total nitrogen in the effluent water within 40 mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a device and a denitrification method for deep denitrification of high nitrogen-containing organic wastewater. technical background [0002] With the rapid development of my country's economy, the amount of waste water has also increased sharply, especially the high-nitrogen organic waste water represented by landfill leachate and aquaculture waste water, which not only has a large output, but also has a high pollutant content. For example, the current output of landfill leachate has reached more than 100 million tons, and the pollutants contained in 1 ton of leachate are equivalent to 100 tons of domestic sewage. If these high-nitrogen-containing organic wastewater cannot be effectively treated and discharged directly into natural water bodies, it will cause irreversible harm to the surrounding environment. [0003] At present, there are mainly physical and chemical me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34
Inventor 王凯洪卫刘勃季华东庄会栋苏颖常功法谭心
Owner SAES ENVIRONMENTAL SCI & TECH CO LTD
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