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Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater

A technology for industrial wastewater and advanced treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. The problem of high cost, to achieve the effect of good removal capacity, good fixation, good mass transfer effect

Active Publication Date: 2013-03-20
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The pollutants contained in industrial wastewater are complex, and most industrial wastewater contains pollutants that are difficult to biodegrade. This makes the effluent of conventional biochemical treatment processes still contain some pollutants such as difficult biodegradable organic matter and ammonia nitrogen, which cannot meet the comprehensive requirements of wastewater. Therefore, it is necessary to add advanced wastewater treatment processes to achieve the discharge of wastewater up to the standard, so as to realize the reuse of wastewater
[0003] At present, the commonly used wastewater advanced treatment processes mainly include: (1) Coagulation and sedimentation process, which is used for advanced wastewater treatment and has a good treatment effect. The effluent quality can meet the national discharge standards, but a certain amount of The chemical agent, and the post-filtration process is required to remove the residual suspended particles in the wastewater, and the treatment cost is high; (2) The activated carbon adsorption process, which is often used in the intensive advanced treatment of wastewater, is affected by the types of pollutants in the influent The impact is small, the treatment effect is good, and the effluent water quality is better than the national comprehensive discharge standard for wastewater. However, due to the high operating cost of the device and the difficulty of activated carbon regeneration, it has not been popularized and applied in the actual advanced wastewater treatment; (3) Enhanced biological treatment As a commonly used enhanced biological treatment technology, the biological aerated filter process is usually used in the advanced biological treatment of wastewater. This process has a good treatment effect on nitrogen-containing pollutants in industrial wastewater, but it is difficult for industrial wastewater The removal effect of biodegradable organic matter is not ideal, and the effluent after this process still contains fine suspended particles, and it is difficult to discharge the treated wastewater up to the standard, and it is also impossible to realize the reuse of industrial wastewater

Method used

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  • Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater
  • Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater

Examples

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Effect test

Embodiment 1

[0032] In this example, the water quality of the biochemically treated refractory organic nitrogen-containing industrial wastewater: the COD concentration is 300 mg / L, the ammonia nitrogen concentration is 20 mg / L, and the pH value is 7.5.

[0033] In this embodiment, the advanced treatment process of refractory organic nitrogen-containing industrial wastewater is as follows: figure 1 As described, the steps are as follows:

[0034] (1) Put the suspended filler 6 made of polyethylene into the moving bed biofilm reactor 1 and carry out biofilm culture. The amount of the suspended filler 6 is 25% of the effective volume of the moving bed biofilm reactor. The biofilm culture method is as follows: adding wastewater with a COD concentration of 500 mg / L and an ammonia nitrogen concentration of 40 mg / L into the moving bed biofilm reactor, the amount of the wastewater being added is 90% of the effective volume of the reactor, and then adding activated sludge , the dosage of activated...

Embodiment 2

[0039] In this example, the water quality of the refractory organic nitrogen-containing industrial wastewater after biochemical treatment: the COD concentration is 300 mg / L, the ammonia nitrogen concentration is 20 mg / L, and the pH value is 7.5.

[0040] In this embodiment, the advanced treatment process of refractory organic nitrogen-containing industrial wastewater is as follows: figure 1 As mentioned, the steps are as follows:

[0041] (1) Put the suspended filler 6 made of polyethylene into the moving bed biofilm reactor 1 and carry out biofilm cultivation, the amount of the suspended filler is 45% of the effective volume of the moving bed biofilm reactor, and the biological The membrane culture method is as follows: add wastewater with a COD concentration of 300mg / L and an ammonia nitrogen concentration of 15mg / L to the moving bed biofilm reactor, the amount of wastewater added is 70% of the effective volume of the reactor, and then add activated sludge, The dosage of ac...

Embodiment 3

[0046] In this example, the water quality of the refractory organic nitrogen-containing industrial wastewater after biochemical treatment: the COD concentration is 300 mg / L, the ammonia nitrogen concentration is 20 mg / L, and the pH value is 7.5.

[0047] In this embodiment, the advanced treatment process of refractory organic nitrogen-containing industrial wastewater is as follows: figure 2 As mentioned, the steps are as follows:

[0048] (1) Put the suspended filler 6 made of polyethylene into the moving bed biofilm reactor 1 and carry out biofilm cultivation, the amount of the suspended filler is 25% of the effective volume of the moving bed biofilm reactor, and the biological The membrane culture method is as follows: add COD concentration 500mg / L, ammonia nitrogen concentration 40mg / L wastewater into the moving bed biofilm reactor, the amount of wastewater added is 90% of the effective volume of the reactor, and then add activated sludge, The dosage of activated sludge i...

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Abstract

The invention relates to a method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater and belongs to the field of industrial wastewater treatment methods. The method comprises the following steps of 1, putting a suspended filler into a moving-bed biomembrane reactor, carrying out biomembrane culture, after the biomembrane culture, inputting difficultly-degraded nitrogen-containing industrial wastewater subjected to biochemical treatment into the moving-bed biomembrane reactor, and carrying out treatment, wherein the moving-bed biomembrane reactor operates by continuous water feeding, continuous draining and continuous aeration methods, 2, inputting the wastewater treated by the moving-bed biomembrane reactor into a membrane bioreactor, wherein the membrane bioreactor is added with activated sludge and operates by the continuous water feeding, continuous draining and continuous aeration methods, and 3, through a cartridge filter, treating the wastewater treated by the membrane bioreactor, and then filtering the treated wastewater by a reverse osmosis device. According to recycle water demands, it is determined if the step 3 is adopted so that quality-classification recycle is realized.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment methods, in particular to a method for advanced treatment of organic nitrogen-containing industrial wastewater. Background technique [0002] The pollutants contained in industrial wastewater are complex, and most industrial wastewater contains pollutants that are difficult to biodegrade, which makes the effluent of conventional biochemical treatment processes still contain some pollutants such as biodegradable organic matter and ammonia nitrogen, which cannot meet the comprehensive requirements of wastewater. Therefore, it is necessary to add an advanced wastewater treatment process to achieve the discharge of wastewater up to the standard, so as to realize the reuse of wastewater. [0003] At present, the commonly used advanced wastewater treatment processes mainly include: (1) coagulation and sedimentation process, which is used for advanced wastewater treatment and has a good tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/44
Inventor 李慧强赖波杨平刘兴鹏
Owner SICHUAN UNIV
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