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Dropping, aeration and biological pretreatment- super filtering combined drinking water purification process

A technology of biological pretreatment and water drop aeration, applied in the field of drinking water treatment, can solve the problems of high water quality of drinking water, inability to remove ammonia nitrogen, low removal rate of organic matter in water, etc., and achieve hygienic and safe effluent quality and small footprint of equipment. , the effect of less sludge discharge

Inactive Publication Date: 2008-03-05
SHANGHAI WATERWORKS SHIBEI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MF membrane and UF membrane can retain most of the suspended solids, colloids and bacteria in water, but cannot remove ammonia nitrogen, and the removal rate of organic matter in water is not high
In a word, so far, there is no treatment method that can not only maintain the good taste and high water quality of drinking water, but also make the treatment simple, low in cost and low in investment.

Method used

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  • Dropping, aeration and biological pretreatment- super filtering combined drinking water purification process
  • Dropping, aeration and biological pretreatment- super filtering combined drinking water purification process

Examples

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Effect test

Embodiment 1

[0019] See Figures 1 and 2. First construct the biological pretreatment device of multi-stage falling water aeration, the present invention adopts three-stage (according to the degree of organic pollution of water quality, also can be greater than three-stage) the biological contact oxidation reactor of falling water aeration, each stage biological contact oxidation The filling volume of the filler 2 in the reactor is equal, and the filler 2 is divided into two parts by the deflector 1. A drop weir 3 is set near the end face of the reactor, and a surrounding barrier is provided under the drop weir 3. The water drop porous baffle 4, the inner diameter of the holes of the drop water porous baffle 4 is 3-5mm, and other structures are similar to general bioreactors. The drop height of each stage is 0.3m, and the total hydraulic retention time (HRT) of the biological contact oxidation reactor is about 1.5 hours. 1 After the filler 2 on one side is divided into two parts, it climbs...

Embodiment 2

[0023] Same as in Example 1, five biological contact oxidation reactors are first constructed to form a five-stage falling water aeration biological pretreatment device, and then the raw water to be treated is raised once, and at a height of 0.5m, the biological contact oxidation Under the condition that the total hydraulic retention time (HRT) of the reactor is about 2.0 hours, the step-by-step drop water oxygenation and biological contact oxidation treatment, the use of biological drop water oxygenation biological pretreatment removes most of the ammonia nitrogen, trace organic matter and algae in the water and other substances, and then the turbidity of the water is further reduced after being filtered by the porous ceramsite filter. The effluent water meets the drinking water quality standard.

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Abstract

The disclosed water-drop aeration biopretreatment-ultrafiltration combined purification technique for drinking water comprises: first, building the multistage water-drop aeration biopretreatment device; then, pumping the raw water once to remove the most ammonia nitrogen by cascade water-drop oxygenation and biological contact oxidation pretreatment and convert the micro dissolved organic into microbe cell; filtering by the protective porous ceramic-aggregate pond; followingly, leading into the ultrafiltration membrane module to reduce the micro organic, ammonia nitrogen, particulate matter, most seston, colloid, and bacteria till meeting the drinking water quality standard. This invention belongs to green technique without coagulant or chlorine, reduces cost and land area, and has wide application for small-scale drinking water treatment.

Description

technical field [0001] The invention relates to a slightly polluted water source water purification treatment technology. Specifically, the combined process of falling water aeration, oxygenation, biological pretreatment and ultrafiltration processes drinking water, and belongs to the technical field of drinking water treatment. Background technique [0002] Slightly polluted source water refers to water that is slightly polluted by organic matter, ammonia nitrogen, algae, etc., referred to as raw water. This water cannot be directly used as drinking water, and must be treated to remove the above-mentioned pollutants and meet drinking water standards. At present, the treatment method for this slightly polluted source water is to set up a biological pretreatment unit before conventional treatment. This method is an effective means for removing ammonia nitrogen and organic matter in water for current water treatment, and it is helpful to improve the physical and chemical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02B01D61/14
CPCY02W10/10
Inventor 吕锡武乐林生康兰英王华成吴今明鲍士荣朱光灿张东
Owner SHANGHAI WATERWORKS SHIBEI
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