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Dense medium coagulating sedimentation water treatment method

A technology of coagulation, sedimentation, and heavy media, which is used in flocculation/sedimentation water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve problems such as poor COD removal effect, achieve process optimization and high water treatment efficiency. , the best effect

Inactive Publication Date: 2020-04-03
光大水务(深圳)有限公司 +2
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AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a dense medium coagulation sedimentation water treatment method, aiming to solve the technical problem that the existing dense medium coagulation sedimentation process has poor COD removal effect

Method used

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Embodiment 1

[0045] This embodiment provides a dense medium coagulation sedimentation water treatment method, including:

[0046] 1) mixing the waste water with the coagulant, and performing the first stirring for 3 minutes to obtain the first mixture;

[0047] 2) adding dense medium particles into the first mixture, and performing a second stirring for 3 minutes to obtain a second mixture, in which flocs with dense medium particles as the core are formed;

[0048] 3) adding a flocculant to the second mixture, performing the third stirring for 8-10 minutes, and further growing the flocs to obtain the third mixture;

[0049] 4) The third mixture is matured, and the flocs continue to grow; then, the flocs are precipitated by an inclined tube sedimentation method, and the sediment is collected for centrifugation to separate sludge and dense medium particles;

[0050] Wherein, the energy density of the first stirring and the second stirring is greater than the energy density of the third stir...

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a dense medium coagulating sedimentation water treatment method, which comprises the following steps: a) mixing wastewater and a coagulant, and carrying out first stirring to obtain a first mixture; b) adding dense medium particles into the first mixture, and carrying out second stirring to obtain a secondmixture, wherein floc taking the dense medium particles as a core is formed in the second mixture; c) adding a flocculating agent into the second mixture, carrying out third stirring, and further growing the floc to obtain a third mixture; and d) aging the third mixture, continuously increasing the floc, precipitating the floc by adopting an inclined tube precipitation method or an inclined plateprecipitation method, collecting the precipitate, centrifuging, and separating sludge and the dense medium particles, wherein the dense medium particles are volcanic rock particles, and the energy density of the first stirring and the second stirring is greater than the energy density of the third stirring. According to the invention, volcanic rock particles with microporous structures are adopted, and flocculation sedimentation and adsorption are integrated.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a dense medium coagulation sedimentation water treatment method. Background technique [0002] Dense medium coagulation and sedimentation is an extremely fast coagulation and sedimentation technology that has been widely used in the domestic water treatment industry in recent years. It increases the suspended solids in wastewater by adding heavy medium particles (inert high-density micro-particles) as flocculation nuclei. At the same time, due to the ballasting or weighting effect of heavy medium particles, the sedimentation process is greatly accelerated to improve the removal effect of turbidity in water. At present, dense medium particles are divided into magnetic powder and non-magnetic powder. The magnetic powder is referred to as the magnetic coagulation sedimentation process, and the non-magnetic powder is the micro-sand coagulation sedimentation proces...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/28
CPCC02F1/281C02F1/5236C02F1/5263C02F2301/08
Inventor 安平林牛涛王冠平吴志国孙立柱沈爱莲俞朝庭
Owner 光大水务(深圳)有限公司
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