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Process for treating low turbidity water

A low turbidity, water treatment technology, applied in the field of water treatment, can solve the problems of polluting the environment, increasing the cost of water treatment, the difficulty of subsequent treatment, and high operating costs

Inactive Publication Date: 2006-12-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the need to add a large amount of coagulant in the current treatment method of low turbidity water, which increases the cost of water treatment and the difficulty of follow-up treatment; in the water purification plant, the sludge discharge water from the sedimentation tank and the backwash water from the filter tank are directly discharged It pollutes the environment and wastes water resources, and adopts processes such as sedimentation and concentration to deal with the problem of high operating costs for reuse, and provides a low-turbidity water treatment method

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: the low turbidity water of this embodiment is processed according to the following steps: (1) return the sludge discharge water of the sedimentation tank and the backwash water of the filter tank to the adjustment tank to form backflow water; (two) adjust the backwash water in the adjustment tank The solid content of running water is 0.5% to 1%; (3) Mix low-turbidity raw water and reflux water according to the reflux ratio greater than 0 and less than 5%, and the turbidity of the water to be treated after mixing is 60-400NTU; (4) After mixing, wait for The treated water can be discharged after subsequent treatment processes such as coagulation, sedimentation and filtration.

[0005] The low turbidity water treatment process of this embodiment promotes the collision chance of the particles in the water with a large number of particles in the reflux water, improves the coagulation effect of the low turbidity water, and saves a lot of water resource...

specific Embodiment approach 2

[0008] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solid content of the reflux water in the regulating tank in step (2) is 0.6% to 0.9%. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the solid content of the backflow water in the regulating tank in step (2) is 0.7% to 0.8%. Other steps are the same as those in Embodiment 1.

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Abstract

The invention discloses a low-turbidity water disposing method, which comprises the following steps: (1) refluxing mud water in the sedimenting pool and inversing-washing water in the filtering pool to form reflux water; (2) adjusting solid content rate of reflux water in the adjusting pool at 0.5-1 percent; (3) blending low-turbidity original water and reflux water with 60-400 NTU turbidity according to reflux rate between 0 and 5 percent; (4) obtaining water through condensing, sedimenting and filtering the blended disposed water.

Description

technical field [0001] The invention relates to a water treatment method. Background technique [0002] Low turbidity water is difficult to treat. At present, clay or other coagulants are added to the raw water to increase the turbidity of the water at home and abroad, so as to promote the formation of flocs and improve the coagulation effect of low turbidity water. The current treatment method for low turbidity water needs to add a large amount of coagulant, which increases the cost of water treatment and the difficulty of subsequent treatment. The sedimentation tank discharge sludge and filter backwash water discharged in the water purification plant account for 3% to 8% of the water production of the water purification plant, and direct discharge not only pollutes the environment but also wastes water resources; while the sludge discharge water from the sedimentation tank of the existing water purification plant Both the process of sedimentation and concentration are use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 崔福义费霞丽刘冬梅魏巍
Owner HARBIN INST OF TECH
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