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Method for biological denitrogenation of nitrogen-containing organic industrial wastewater

A technology for industrial wastewater and biological denitrification, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high total nitrogen removal rate, high power consumption and increased treatment costs and other problems, to achieve the effect of high pollutant removal efficiency, low operating cost, and improved removal rate.

Active Publication Date: 2013-03-20
SICHUAN UNIV
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  • Claims
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Problems solved by technology

The pre-denitrification process is also called the A / O process. This process has good adaptability to the change of wastewater quality. It does not need to add an organic carbon source and has a certain denitrification effect. However, it needs to adopt effluent backflow measures, and the power consumption is higher large, and is easily affected by pollutants in wastewater, thereby affecting the removal effect of total nitrogen, and the removal rate of total nitrogen is usually not higher than 80%. It is necessary to add an organic carbon source, which increases the treatment cost, and when the organic carbon source is added too much, it will affect the water quality of the effluent

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  • Method for biological denitrogenation of nitrogen-containing organic industrial wastewater

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Embodiment 1

[0025] In this embodiment, the COD concentration of nitrogen-containing organic industrial wastewater is 800 mg / L, the total nitrogen concentration is 130 mg / L, and the pH value is 7.5. The process for biological denitrification is as follows figure 1 As mentioned, the steps are as follows:

[0026] (1) At a stirring speed of 60r / min, nitrogen-containing organic industrial wastewater is input into the regulating pond from the bottom of the regulating pond through the first water inlet pump 4-1, and the pH value control device 5 and temperature control device 6 are set to The pH value of the wastewater in the regulating pool is controlled at 7.0, and the temperature is controlled at 15°C;

[0027] (2) Put the suspended filler 8 made of polyethylene into the moving bed biofilm reactor 2 and carry out biofilm cultivation. The amount of the suspended filler 8 is 60% of the effective volume of the moving bed biofilm reactor. The biofilm cultivation method is as follows: add wastew...

Embodiment 2

[0032]In this embodiment, the COD concentration of nitrogen-containing organic industrial wastewater is 800 mg / L, the total nitrogen concentration is 130 mg / L, and the pH value is 7.5. The process for biological denitrification is as follows figure 1 As mentioned, the steps are as follows:

[0033] (1) At a stirring speed of 60r / min, nitrogen-containing organic industrial wastewater is input into the regulating pond from the bottom of the regulating pond through the first water inlet pump 4-1, and the pH value control device 5 and temperature control device 6 are set to The pH value of the wastewater in the regulating pool is controlled at 8.0, and the temperature is controlled at 20°C;

[0034] (2) Put the suspended filler 8 made of polyethylene into the moving bed biofilm reactor 2 and carry out biofilm cultivation, the amount of the suspended filler 8 is 70% of the effective volume of the moving bed biofilm reactor, and the The biofilm cultivation method is as follows: add...

Embodiment 3

[0039] In this embodiment, the COD concentration of nitrogen-containing organic industrial wastewater is 800 mg / L, the total nitrogen concentration is 130 mg / L, and the pH value is 7.5. The process for biological denitrification is as follows figure 1 As mentioned, the steps are as follows:

[0040] (1) At a stirring speed of 60r / min, nitrogen-containing organic industrial wastewater is input into the regulating pond from the bottom of the regulating pond through the first water inlet pump 4-1, and the pH value control device 5 and temperature control device 6 are set to The pH value of the wastewater in the regulating pool is controlled at 7.0 and the temperature is controlled at 30°C;

[0041] (2) Put the suspended packing 8 made of polyethylene into the moving bed biofilm reactor 2 and carry out biofilm cultivation, the amount of the suspended packing 8 is 80% of the effective volume of the moving bed biofilm reactor, and the The biofilm cultivation method is as follows: a...

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Abstract

The invention relates to a method for biological denitrogenation of nitrogen-containing organic industrial wastewater and belongs to the field of industrial wastewater treatment methods. The method comprises the following steps of 1, feeding nitrogen-containing organic industrial wastewater into a regulating tank with stirring so that water in the regulating tank is homogenized, 2, pouring a suspended filler into a moving-bed bio-membrane reactor, carrying out bio-membrane culture, after the bio-membrane culture, inputting the wastewater in the regulating tank into the moving-bed bio-membrane reactor, and carrying out treatment, wherein the moving-bed bio-membrane reactor operates by water continuous feeding, water continuous discharge and intermittent aeration methods, and 3, inputting the wastewater treated by the moving-bed bio-membrane reactor into an inner circulating membrane bioreactor, putting activated sludge into the inner circulating membrane bioreactor, treating by the water continuous feeding, water continuous discharge and intermittent aeration methods, treating the treated wastewater by a membrane filtration assembly of the inner circulating membrane bioreactor, and discharging it so that biological denitrogenation treatment on nitrogen-containing organic industrial wastewater is finished.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment methods, in particular to a biological denitrification method for organic industrial wastewater. Background technique [0002] At present, the treatment of industrial wastewater usually adopts physical and chemical methods and biochemical methods. Physicochemical methods are usually used in the pretreatment process of high-concentration industrial wastewater. The reaction speed is fast and the treatment effect is good, but the treatment cost of this method is too high; Pollutants and toxic substances will affect the activity of microorganisms in the biochemical treatment process, resulting in a decrease in the treatment capacity of the biochemical treatment process. Therefore, the treatment of industrial wastewater is often carried out by combining physicochemical and biochemical processes, and the biochemical treatment process is a strong guarantee for the quality of effluent. [...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 李慧强彭玉梅赖波杨平
Owner SICHUAN UNIV
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