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Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent

An adsorbent and modification technology, which is used in the treatment of low-temperature, low-turbidity, and high-color water, can solve the problems of low treatment efficiency, poor effect, and unenvironmental protection, and achieve the effects of good sedimentation, high efficiency and low cost.

Active Publication Date: 2013-07-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low treatment efficiency, poor effect, high cost and non-environmental protection in the existing low-temperature, low-turbidity and high-color water treatment method, and to provide a modified palygorskite flocculation adsorbent to treat low-temperature The method of low turbidity and high color water

Method used

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  • Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent
  • Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent
  • Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent

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specific Embodiment approach 1

[0011] Embodiment 1: This embodiment is a method for treating low-temperature, low-turbidity, and high-color water with modified palygorskite flocculation adsorbent, which is specifically completed according to the following steps:

[0012] Firstly, the composite aluminum-iron and modified palygorskite flocculation adsorbent are added to the mixing tank of high-density sedimentation tank equipped with low-temperature, low-turbidity and high-color water at the same time, and then the sludge reflux ratio is 2% to 5%, pH 7±0.3, the bottom sludge concentration is 10000mg / L~20000mg / L, the stirring speed of the flocculation tank is 60r / min~80r / min and the speed of the mud scraper is 10r / min~20r / min. The water outlet of the high-density sedimentation tank is treated with low-temperature, low-turbidity and high-color water; the mass ratio of the added composite aluminum-iron to the modified palygorskite flocculation adsorbent is 1: (1-3); if the low-temperature, low-turbidity and high ...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: when the sludge reflux ratio is 5%, the pH is 7, the bottom sludge concentration is 18000mg / L~20000mg / L, and the stirring speed of the flocculation tank is 60r / min and the speed of mud scraper is 15r / min, and the dosage of composite aluminum and iron is 2mg / L, and the dosage of modified palygorskite flocculation adsorbent is 4mg / L. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the modified palygorskite flocculation adsorbent is completed according to the following steps: one, purification: first natural palygorskite and Add the natural palygorskite to the deionized water according to the mass ratio of 1: (18-99), and then stir and disperse it for 10min-30min at a stirring speed of 1000r / min-10000r / min to obtain a clay slurry, and then mix the clay The slurry is placed in a centrifuge, and centrifuged at a centrifugal speed of 4000r / min to 12000r / min for 10min to 20min. After centrifugation, an off-white clay paste is obtained, and dried at a temperature of 80°C to 120°C until constant weight. After crushing through a 200 mesh sieve, purified palygorskite with a particle size of less than 200 mesh can be obtained; 2. Loading: first, dissolve chitosan with a deacetylation degree of 85% to 95% in a 2% volume fraction in glacial acetic acid, a...

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Abstract

The invention relates to a method for treating low-temperature low-turbidity high-color water, in particular relates to a method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent, and aims at solving the problem that the existing method for treating low-temperature low-turbidity high-color water has low treatment efficiency, poor treatment effect and is not environment-friendly. The method comprises the steps of: firstly feeding compound aluminum and ferrum, and modified palygorskite flocculation adsorbent in a mixing pit witha low-temperature low-turbidity high-color water high-density sedimentation basin, and treating by adopting the modified palygorskite flocculation adsorbent or return sludge as a carrier under conditions of certain sludge return ratio, pH, bottom sludge concentration, stirring speed of a flocculation basin and the revolving speed of a sludge scraper, thus obtaining low-temperature low-turbidity high-color water at the water outlet of the high-density sedimentation basin. The method is mainly used for treating low-temperature low-turbidity high-color water.

Description

technical field [0001] The invention relates to a treatment method for low-temperature, low-turbidity and high-color water. Background technique [0002] Most alpine regions such as Northeast and Northwest my country have a freezing period of nearly 6 months. In low temperature seasons, the self-purification ability of water bodies is poor, and the content of color-causing organic substances such as humic acids in water sources is high, which will not only affect the color, smell, and taste of water bodies , but also increase the stability of inorganic particles, heavy metals and even non-ionic organic compounds in water through surface adsorption or surface complexation; in addition, humic acid is a more toxic MX[3-chloro-4 (dichloro methyl)-5-hydroxy-2(5H)-furanone], and organic chlorinated disinfection by-products (DPBs) can be produced during the pre-chlorination disinfection process, which is difficult to deal with. With the help of conventional water treatment process It...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/52B01J20/24B01J20/30
Inventor 于水利孙楠时文歆衣雪松
Owner HARBIN INST OF TECH