Dense medium coagulating sedimentation water treatment method

A technology of coagulation and sedimentation and dense media, which is applied in the direction of flocculation/sedimentation water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of difficulty in controlling the alkalinity of wastewater to be treated, cumbersome operation, and high treatment cost. problems, achieve process optimization, prevent excessive alkalinity, and reduce treatment costs

Pending Publication Date: 2020-04-03
光大水务(深圳)有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a dense medium coagulation sedimentation water treatment method, which aims to solve the technical problems of the prior art that it is difficult to control the alkalinity of the wastewater to be treated, the operation is cumbersome, and the treatment cost is high.

Method used

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Embodiment 1

[0043] This embodiment provides a dense medium coagulation sedimentation water treatment method, including:

[0044] 1) mixing the waste water with the coagulant, and performing the first stirring for 3 minutes to obtain the first mixture;

[0045] 2) Calcium carbonate is added to the first mixture, and the second stirring is carried out for 3 minutes to obtain the second mixture, in which a floc with dense medium particles as the core is formed;

[0046] 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;

[0047] 4) The third mixture is matured, and the flocs continue to increase; then, the flocs are precipitated by the inclined tube sedimentation method or the inclined plate sedimentation method, and the sediment is collected for centrifugation to separate the sludge and the dense medium particles;

[0048] Wherein, the energy density of the first stirring and the second st...

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Abstract

The invention belongs to the technical field of water treatment, and provides a dense medium coagulating sedimentation water treatment method, which comprises the following steps: a) mixing wastewaterand 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 second mixture, 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 plate precipitationmethod, collecting the precipitate, centrifuging, and separating sludge and the dense medium particles, wherein the dense medium particles are calcium carbonate, 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, calcium carbonate is adopted, so that the alkalinity of to-be-treated wastewater can be prevented from being too low, and flocculating settling and alkalinity supplementing 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. After adding coagulant, it uses heavy medium particles (inert high-density micro particles) Nucleation increases the concentration of suspended solids in wastewater and accelerates the formation of flocs. At the same time, due to the ballasting or weighting effect of dense 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-mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/66
CPCC02F1/5236C02F1/66C02F2301/08
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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