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A nano flocculant for sludge settlement and preparation method thereof

A nano flocculant and sludge settlement technology, applied in the field of environment and chemistry, can solve the problems of large flocculant consumption and high economic cost, and achieve the effect of reducing the amount of residual sludge, wide application range, and less dosage

Active Publication Date: 2021-11-30
王凯军 +1
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Problems solved by technology

[0005] In view of the existing problems of long sludge settling time, large flocculant consumption and high economic cost, the purpose of this invention is to develop a nano flocculant for sludge settling and its preparation method, aiming at increasing the sludge settling rate and realizing Efficient and rapid separation of mud and water to improve the quality of effluent water

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  • A nano flocculant for sludge settlement and preparation method thereof
  • A nano flocculant for sludge settlement and preparation method thereof
  • A nano flocculant for sludge settlement and preparation method thereof

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preparation example Construction

[0023] A kind of nano flocculant and preparation method for sludge settlement, wherein, comprise the following steps:

[0024] Step 1: the preparation of nanometer polyferric chloride:

[0025] 5.53g FeCl 3 ·6H 2 O was fully dissolved in 61.13 g of distilled water, and 2.173 g of Na was slowly added during stirring 2 CO 3 It takes a total of 2 hours for the powder to reach an alkalinity of 1, and then add 0.1164g Na 2 HPO 4 As a stabilizer, at a rotating speed of 900rpm, after magnetic stirring for 15 hours, place it at 4°C for refrigerated aging for 1-6 days to obtain a tan nano-polyferric chloride solution, wherein the mass fraction of Fe is 1.72%;

[0026] Step 2, preparation of nano-flocculation agent: Accurately weigh 5.6 g of polyferric chloride obtained in step 1, and slowly add polydimethyldiallyl with a solid content of 20% during magnetic stirring at room temperature. Ammonium chloride 5.6180g, dimethyl diallyl chloride 0.1561g with a solid content of 60%, so t...

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Abstract

The invention discloses a nano flocculant for sludge settlement and a preparation method thereof, belonging to the technical field of environment and chemistry. First, it includes a nano flocculant and a preparation method, and its composition is: the mass fraction of polydimethyldiallylammonium chloride is 9.88% with a solid content of 20%, and dimethyldiallyl with a solid content of 60%. The mass fraction of ammonium chloride is 0.82%, the mass fraction of Fe is 0.85%, and the balance is water. At 20°C, the density is 1.1-1.2, the pH is 1.80-1.90, and the particle size distribution is between 60-100nm. Secondly, the nano-flocculation agent was diluted 300 times, and used in municipal and industrial sewage plant activated sludge settlement experiments on the day of preparation and after 45 days of storage. The results showed that: 2 minutes before the end of aeration, the drug concentration was 20 μL / L, and the sedimentation effect of the activated sludge in the aerobic tank was significantly accelerated. Therefore, the nano flocculant of the present invention has the advantages of less feeding amount, stable performance, fast sludge settlement, wide application range, etc., which helps municipal and industrial sewage treatment plants to increase the amount of treated water and reduce the area occupied by secondary sedimentation tanks.

Description

technical field [0001] The invention belongs to the technical field of environment and chemistry, and specifically relates to a flocculant capable of significantly improving the settling performance of activated sludge, that is, polyferric chloride-polydimethyldiallylammonium chloride-dimethyldiallyl The preparation method of ammonium chloride nano flocculant. Background technique [0002] Sludge bulking is a relatively common problem in activated sludge sewage treatment technology. Sludge bulking will lead to lighter activated sludge quality and deterioration of settling performance. It is difficult to carry out normal mud-water separation in the secondary sedimentation tank, resulting in deterioration of effluent quality. Poor, directly affect the sewage treatment effect. At present, the development of aerobic granular sludge technology provides a new idea for solving the problem of sludge bulking. However, due to the complexity of water quality and the existence of probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/148C02F1/56C02F1/52C02F1/54
CPCC02F1/5236C02F1/54C02F1/56C02F11/14
Inventor 王凯军何文妍
Owner 王凯军
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