Method for treating high-concentration ammonia nitrogen wastewater by autotrophic denitrification process

A technology for ammonia nitrogen wastewater and autotrophic denitrification, applied in sedimentation treatment, anaerobic digestion treatment, chemical instruments and methods, etc., can solve the problems of high cost, difficult treatment of high concentration ammonia nitrogen wastewater, immature technology, etc., and achieve carbon saving source, save aeration consumption, and save operating costs

Inactive Publication Date: 2016-07-27
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a high-load biological denitrification process according to the current problems such as difficult treatment of high-concentration ammonia-nitrogen wastewater, high cost, and immature technology

Method used

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  • Method for treating high-concentration ammonia nitrogen wastewater by autotrophic denitrification process
  • Method for treating high-concentration ammonia nitrogen wastewater by autotrophic denitrification process
  • Method for treating high-concentration ammonia nitrogen wastewater by autotrophic denitrification process

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Embodiment 1

[0019] For the treatment process of high-concentration ammonia-nitrogen wastewater COD at 5000-10000mg / L and ammonia nitrogen at 3000-5000mg / L, the process flow chart is as follows figure 1 shown.

[0020] 1. Concentrate the sewage into the regulating tank for concentration and homogeneity. Use a lift pump to pass the raw water through the regulating tank into the CANON tank system with biological fluidized bed filler activated sludge. In this tank, nitrous bacteria, ANAMMOX bacteria and denitrifying bacteria and microorganisms grow and reproduce at the same time. Intermittent aeration is used to Limit oxygen supply, inhibit the growth of nitrifying bacteria (NOB), and enrich nitrosobacteria and anaerobic ammonium bacteria. Aerate for 60 minutes every 8 hours. After aeration, the dissolved oxygen concentration is 5-6mg / L. Stir after aeration During the process, the dissolved oxygen concentration is slowly reduced to 0.3-0.5mg / L, the pH value is controlled at 6-9, and the temp...

Embodiment 2

[0026] Method steps for treating high-concentration ammonia nitrogen wastewater with an original ammonia nitrogen content of 1500-2000 mg / L, a chemical oxygen demand (COD) content of 2000-3000 mg / L, and a suspended solids (SS) content of 3000-5000 mg / L:

[0027] 1. Concentrate the sewage into the regulating tank for concentration and homogenization, and then use the lift pump to drive the raw water through the regulating tank into the CANON tank system with biological fluidized bed filler activated sludge. The tank grows and reproduces at the same time, including nitrous bacteria , ANAMMOX bacteria, denitrifying bacteria and other microorganisms, the intermittent aeration method is used to limit the oxygen supply, inhibit the growth of nitrifying bacteria (NOB), and enrich the nitrosifying bacteria and anaerobic ammonium bacteria, and aerate for 40 minutes every 6 hours. After the end of the aeration, the dissolved oxygen concentration is 4-5mg / L, and the dissolved oxygen conce...

Embodiment 3

[0033]Process steps for treating industrial wastewater with an ammonia nitrogen content of 2000-3000mg / L, a COD content of 3000-5000mg / L, and a pH of 6-7:

[0034] 1. Concentrate the sewage into the regulating tank for concentration and homogenization, and then use the lift pump to drive the raw water through the regulating tank into the CANON tank system with biological fluidized bed filler activated sludge. The tank grows and reproduces at the same time, including nitrous bacteria, Microorganisms such as ANAMMOX bacteria and denitrifying bacteria use intermittent aeration to limit oxygen supply, inhibit the growth of nitrifying bacteria (NOB), and enrich nitrosifying bacteria and anaerobic ammonium oxygen bacteria. Aeration is performed for 50 minutes every 8 hours. The dissolved oxygen concentration is 6-7mg / L, the dissolved oxygen concentration is slowly reduced to 0.3-0.6mg / L during the stirring process after the aeration, the pH value is controlled at 6-9, the temperature...

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Abstract

The invention relates to a method for treating high-concentration ammonia nitrogen wastewater by a autotrophic denitrification process, and belongs to the technical field of wastewater treatment and recycling. The method is characterized by being a completely autotrophic biological denitrification process based on nitrite, wherein by virtue of the action of ammonia oxidizing bacteria (AOB), ammonia is oxidized into nitrite; and by virtue of the action of anaerobic ammonia oxidation bacteria (AAOB), the residual ammonia and nitrite are converted into nitrogen gas. According to the method, a biological fluidized bed filler is added into a CANON tank, so that the ammonia nitrogen treatment load is improved, and therefore, the method is an efficient and energy-saving ammonia nitrogen wastewater treatment process. Active sludge can be recycled, so that the method has remarkable environmental benefits and economic benefits.

Description

1. Technical field [0001] The invention relates to a method for treating high-concentration ammonia-nitrogen wastewater by using an autotrophic denitrification process, and belongs to the technical field of wastewater treatment and recycling. 2. Background technology [0002] Excessive discharge of ammonia nitrogen into the water body will lead to eutrophication of the water body, reducing the ornamental value of the water body, and the nitrate and nitrite produced by oxidation will also affect the health of aquatic organisms and even human beings. Therefore, wastewater denitrification treatment has received widespread attention. At present, the main denitrification methods include biological nitrification and denitrification, breakpoint chlorination, air stripping and ion exchange. Nitrification sludge dehydration liquid, landfill leachate, catalyst production plant wastewater, meat processing wastewater and synthetic ammonia chemical wastewater contain extremely high conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F3/28C02F3/301C02F3/34C02F2001/007
Inventor 王曙光卢磊张强强潘德恩房计秋
Owner SHANDONG UNIV
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