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Method for treating micro-polluted water

A technology for micro-polluted water and treatment methods, which is applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. Unable to guarantee the removal effect of refractory organic matter, etc.

Active Publication Date: 2008-11-19
BEIJING ORIGINWATER TECH CO LTD
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Problems solved by technology

At present, there have been many studies on the treatment of slightly polluted surface water with low pollutant content as drinking water; there are few studies on the treatment of slightly polluted surface water with high pollutant content as landscape reuse water; Sub-regression water is the water source, which contains a large amount of refractory organic matter, and there are fewer studies on the treatment of inferior V surface water with relatively high nitrogen and phosphorus content to surface III water bodies (except for total nitrogen).
[0006] Conventional biological treatment technology, even if the membrane bioreactor method is used, cannot guarantee the removal effect on refractory organic matter if effective measures are not taken; biological denitrification technology must also take certain measures to maintain the ideal under low carbon-nitrogen ratio. Nitrogen removal level; It is difficult to effectively remove nitrogen, phosphorus and refractory organic matter at the same time by coagulation and sedimentation alone

Method used

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  • Method for treating micro-polluted water
  • Method for treating micro-polluted water
  • Method for treating micro-polluted water

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Embodiment 1

[0061] In this embodiment, the inferior V class Wenyu River water in Beijing is treated to reach the surface water class III level (TN<15mg / L), and the daily treatment capacity is 10 tons. The raw water is taken from 1.46km upstream of Lutuan Gate of Wenyu River.

[0062] The micro-polluted water treatment steps of this embodiment are as follows:

[0063] a. Slightly polluted water passes through the pretreatment system to remove mechanical impurities of different sizes existing in the slightly polluted water;

[0064] b. The coagulant addition system 7 adds a part of the coagulant to the pretreated sewage in step a), and the amount of the coagulant added is that the weight ratio of the coagulant to the pretreated sewage is 10*10 -6 : 1, this pretreatment sewage enters in the sedimentation tank 2, stays for 25 minutes, separates the supernatant and sedimentation sludge, contains most of the total phosphorus and a part of organic matter that exist in the sewage in the sediment...

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Abstract

The invention relates to a method for processing micro-polluted water. The method utilizes the technology of integrating a membrane bioreactor with coagulating sedimentation and biological denitrogeneration, overcomes the defects of the processing technology of a conventional membrane bioreactor, realizes stable treatment effect, can simultaneously remove organic substances, nitrogen, phosphor and chromaticity in the water, and has the good effect of wide application range.

Description

【Technical field】 [0001] The invention belongs to the technical field of wastewater treatment. More specifically, the present invention relates to a treatment method for slightly polluted water. 【Background technique】 [0002] With the continuous improvement of people's living standards in our country, people's requirements for environmental quality are also getting higher and higher. On the one hand, people need a lot of water for leisure and entertainment, on the other hand, the surface water bodies of a large number of rivers and lakes cannot meet the material and cultural life needs of the people due to pollution. For this reason, relevant parties have invested a lot of money to reuse and treat the slightly polluted surface water polluted by industrial, agricultural and domestic sewage along the line with high pollutant content, using the secondary return water of the sewage treatment plant as the water source. [0003] Membrane bioreactor is a new type of high-efficie...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/30C02F1/78
Inventor 文剑平梁辉俞开昌杨利陈春生
Owner BEIJING ORIGINWATER TECH CO LTD
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