Dual-membrane processing system and method for micro-polluted raw water

A technology of treatment system and treatment method, which is applied in the field of drinking water treatment system, can solve the problems that it is difficult to control biological pollutants such as bacteria, cannot guarantee the biological safety of water quality, and the instability of effluent water quality, so as to improve biological safety, The effect of small footprint and energy saving in operation

Inactive Publication Date: 2011-06-01
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 problems that the existing drinking water treatment technology cannot guarantee the biological safety of water quality, it is difficult to control biological pollutants such as bacteria in the effluent, and the process is complicated and the effluent water quality is unstable. Two-stage membrane treatment system and treatment method for raw water

Method used

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  • Dual-membrane processing system and method for micro-polluted raw water
  • Dual-membrane processing system and method for micro-polluted raw water

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment includes a raw water lift pump 1, a mixing assembly 2, a microfiltration membrane separation assembly 3, an ultrafiltration membrane separation assembly 4, a self-priming pump 5, a clear water assembly 6, a backwash pump 8, an outlet pipe 9, The first pipeline 11, the second pipeline 12, the third pipeline 13, the fourth pipeline 14, the fifth pipeline 15, the sixth pipeline 16, the seventh pipeline 17, the eighth pipeline 18, the ninth pipeline pipeline 19, three water flowmeters 20 and several control valves 10, the mixing assembly 2 is composed of a mixing tank 2-1, a medicine storage tank 2-2, a medicine adding pump 2-3, a medicine adding valve 2-4, Composed of dosing flowmeter 2-5, agitator 2-6 and reaction liquid float valve 2-7, medicine storage pool 2-2 passes through dosing pump 2-3, dosing valve 2-4, dosing flowmeter 2- 5 communicates with the mixing pool 2-1, the agi...

specific Embodiment approach 2

[0015] Specific implementation mode two: combination figure 1 To describe this embodiment, the height of the microfiltration membrane separation tank 3-1 of this embodiment is 3 meters to 4 meters, and the average water pressure of the microfiltration membrane module 3-2 is 20KPa to 30KPa. This design enables the microfiltration membrane separation tank 3-1 to discharge water by its own weight, saving energy consumption. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0016] Specific implementation mode three: combination figure 1 To describe this embodiment, the microfiltration membrane in the microfiltration membrane module 3-2 of this embodiment is a hollow fiber membrane with a pore size of 0.1 micron to 1 micron. Other compositions and connections are the same as those in Embodiment 1 or 2.

[0017] Specific implementation mode four: combination figure 1To illustrate this embodiment, the ultrafiltration membrane in the ultrafiltration membrane module 4-2 of this embodiment is a hollow fiber membrane, and its pore size is 0.01 micron to 0.1 micron. Other components and connections are the same as those in the third embodiment.

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Abstract

The invention provides a dual-membrane processing system and method for micro-polluted raw water, relating to a processing system and method for drinkable water and aiming to solve problems that the prior drinkable water processing technology cannot ensure biological safety of water quality, can hardly control contaminants of biological origin such as bacteria, has complicated process and causes unstable effluent quality. Most of colloids and granular materials in raw water are removed by using a micro-filtration membrane module and micro-organic contaminants such as bacteria are completely entrapped by using an ultra-filtration membrane module so as to realize water processing by using two membranes. The method comprises the following steps: raw water and water processing medicines are mixed in a mixing pool and then the mixture is added in a micro-filtration membrane separating pond to completely react, the products of reaction are filtered by the micro-filtration membrane module to obtain filtered water, and then the filtered water is added in the ultra-filtration membrane separating pond to be filtered by the ultra-filtration membrane module to obtain clean water, and the clean water is added in a clean water tank to be sterilized by a sterilant to obtain drinkable water. The invention is used for production of drinkable water with micro-polluted surface water as a water source and water quality safeguard.

Description

technical field [0001] The invention relates to a drinking water treatment system and method. Background technique [0002] The traditional drinking water production process includes coagulation-sedimentation-filtration-disinfection, advanced treatment includes ozone-activated carbon and other technologies, but with the deterioration of raw water and the improvement of drinking water quality standards, the conventional process can no longer meet the water quality requirements. And there are many by-products of water treatment; although advanced treatment can effectively remove some organic matter, ammonia nitrogen and other pollutants compared with conventional processes, and can reduce the formation potential of by-products to a certain extent, it cannot guarantee the biological safety of water quality and is difficult to control Bacteria and other biological pollutants in the effluent. For existing water plants, it is urgent to renovate on the basis of the existing techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/50
Inventor 高伟梁恒韩梅李圭白
Owner HARBIN INST OF TECH
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