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Method for carrying out advanced treatment on papermaking sewage

A technology for advanced treatment of paper-making sewage, applied in biological water/sewage treatment, adsorption water/sewage treatment, oxidized water/sewage treatment, etc. solve problems well

Inactive Publication Date: 2007-10-10
SHANDONG SWAN WATER ENG
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Problems solved by technology

At present, there are many kinds of purification and treatment technologies for papermaking sewage, but due to various reasons, they cannot meet the treatment requirements of paper mills. Some technologies are backward and cannot achieve the treatment effect, and some facilities have too much investment. It is difficult for the factory to bear, and because the cost of sewage treatment agent is too high, it is difficult to maintain the treatment cost, etc.
Therefore, the problem of papermaking sewage treatment has not been well resolved.
Under the conditions of reasonable operating parameters of this process, the effluent from the secondary settling tank can generally meet the national or local standards, but the effluent quality of the secondary settling tank is far higher than the strict sewage discharge standards or the quality of production reuse water

Method used

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  • Method for carrying out advanced treatment on papermaking sewage

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Embodiment Construction

[0023] The following is a specific implementation manner of the content of the present invention, and the content of the present invention will be further clarified through the specific implementation mode below. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention, and should not be construed as limiting the scope of the present invention.

[0024] When carrying out the expansion test, firstly, several tons of biochemical treatment effluent from the middle section of papermaking water are taken from the paper mill, and poured into several large-volume plastic tanks, each tank can store 1-2m of sewage 3 , used as a raw water storage tank. Before the test starts, the aluminum salt or iron salt or iron-aluminum salt mixture solution is formulated to a concentration of 10%-30%, and the cationic or anionic or nonionic PAM is formulated to a concentration of 0.05%-0.5%. After the start of the test, according to t...

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Abstract

This invention provides a method for deeply treating papermaking wastewater. The method comprises: treating wastewater in a biochemical secondary precipitation pool, performing chemical flocculation, precipitating, filtering with composite filtration materials, adsorbing with biological adsorbent or oxidizing with oxidant, storing in a clear water tank, and recycling. The water purifier of chemical flocculation is composed of aluminum salt and / or iron salt, and nonionic, anionic or cationic polyacrylamide. The aluminum salt is one or more of aluminum chloride, aluminum sulfate and potassium aluminum sulfate. The iron salt is one or more of ferrous sulfate, ferric sulfate, poly (ferric sulfate) and ferric chloride. The biological adsorbent is adsorbent containing active sludge. The oxidant is ozone, ClO2 or Cl2. After deeply treated with this method, wastewater can satisfy strict discharge standards.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for advanced treatment of papermaking sewage. Background technique [0002] At present, there are many small and medium-sized paper mills all over the country, but the discharge of papermaking sewage pollutes the environment, and the serious consequences caused by it are not allowed by environmental protection regulations. Therefore, the sewage purification treatment of small and medium-sized paper mills has become an important issue for the survival and development of many paper mills. Papermaking wastewater has complex components, including high content of organic pollutants and inorganic pollutants, and biological treatment is very difficult. It is one of the most difficult industrial wastewater to treat. At present, there are many kinds of purification and treatment technologies for papermaking sewage, but due to various reasons, they cannot meet the treatment requiremen...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F1/72C02F1/28C02F3/10C02F103/28
CPCY02W10/10
Inventor 庞鹏远
Owner SHANDONG SWAN WATER ENG
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