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Pressure type foamless film type oxygenating system and method thereof

A pressure type, bubble film technology, applied in the field of environmental engineering, can solve the problems of large aeration volume, high energy consumption, low oxygen utilization rate, etc., and achieve the effect of simple process, low energy consumption, and improved sludge load capacity.

Inactive Publication Date: 2008-08-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the aeration of the biochemical degradation technology is changed from the original perforated aeration to microporous aeration, but there are still problems such as large aeration volume, low oxygen utilization rate, and high energy consumption.

Method used

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  • Pressure type foamless film type oxygenating system and method thereof
  • Pressure type foamless film type oxygenating system and method thereof
  • Pressure type foamless film type oxygenating system and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The membrane device used is PP hollow fiber curtain membrane, the process is shown in Figure 2, and there are 3 membrane devices; the size of the membrane type non-bubble oxygenator is 30×21×30cm 3 , PP hollow fiber membrane pore size: 0.1-0.2μm, membrane wall thickness: 40-50μm, outer diameter: 450μm, porosity: 40-50%, air permeability: >7.0×10 -2 (cm 3 / cm 2 ·s·cmHg), the bubble point is MPa. The device size is 20×25cm, the effective length of the membrane filament is 20cm, and the effective area of ​​the membrane is 1×3m 2 . The test water is pure water, and the dissolved oxygen is considered to be close to zero at this time. The test gas is oxygen or air, and the pressure is controlled by the pressure reducing valve after passing through the gas storage tank. The hydraulic retention time in the membrane-type non-bubble oxygenator is 15min and 30min respectively, and the dissolved oxygen in the effluent is measured with a dissolved oxygen meter. The oxygenation ...

Embodiment 2

[0042] The membrane device used is PE hollow fiber curtain membrane, the process is shown in Figure 2, and there are 3 membrane devices; the size of the membrane type non-bubble oxygenator is 30×21×30cm 3 , PP hollow fiber membrane pore size: 0.1-0.2μm, membrane wall thickness: 40-50μm, outer diameter: 450μm, porosity: 40-50%, air permeability: >7.0×10 -2 (cm 3 / cm 2 ·s·cmHg), the bubble point is MPa. The device size is 20×25cm, the effective length of the membrane filament is 20cm, and the effective area of ​​the membrane is 1×3m 2 . The test water is pure water, and the dissolved oxygen is considered to be close to zero at this time. The test gas is oxygen or air, and the pressure is controlled by the pressure reducing valve after passing through the gas storage tank. The hydraulic retention time in the membrane-type non-bubble oxygenator is 15min and 30min respectively, and the dissolved oxygen in the effluent is measured with a dissolved oxygen meter. The oxygenation ...

Embodiment 3

[0045] The membrane device used is a PVDF hollow fiber column membrane, the process is shown in Figure 5, and there are 7 membrane devices; the diameter of the cylindrical membrane type non-bubble oxygenator is , the PVDF hollow fiber membrane pore diameter is 0.01-0.2 μm, and the membrane wall thickness is 150 ~250μm, inner diameter 1.2mm, porosity: 50~85% air permeability: >1.0×10 -2 (cm 3 / cm 2 ·s·cmHg), the bubble point is 0.45MPa. The effective length of the membrane filament is 20cm, and the effective area of ​​the membrane is 7×0.15m 2 . The test water is pure water, and the dissolved oxygen is considered to be close to zero at this time. The test gas is oxygen or air, and the pressure is controlled by the pressure reducing valve after passing through the gas storage tank. The hydraulic retention time in the membrane-type non-bubble oxygenator is 15min and 30min respectively, and the dissolved oxygen in the effluent is measured with a dissolved oxygen meter. The ox...

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Abstract

The invention discloses an oxygenation system with a pressure type and a non-foam membrane type and a method thereof. In the system, a regulating pond is connected with a flocculation subside pond and an oxidation reaction pond; membrane type of non-foam aeration oxygenators are respectively connected with the flocculation subside pond and the oxidation reaction pond; a hydraulic distributor is arranged on the bottom of the oxidation reaction pond. The method of the invention comprises the processes: raw water flows into the flocculation subside pond through the regulating pond; supernatant of the flocculation subside pond flows into the membrane type of non-foam aeration oxygenator automatically or by a pump; water non-foam oxygenated when flows on the membrane surface flows into the bottom of an activity mud oxidation reaction pond through a membrane type of non-foam aeration oxygenation pond and the hydraulic distributor; as rolling flow is formed by the effect of hydraulic flow, the method plays an effect of mixture stirring simultaneously. The oxygenation method of non-foam membrane type is characterized by simple technology, low energy consumption, small occupied area and high application effect of oxygen, etc. The oxygenation method is specially suitable for updating and transforming of the activity mud aeration pond (aerobic oxidation reaction pond) in the technology of wastewater processing.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a pressure-type bubble-free film-type oxygenation system and a method thereof. Background technique [0002] my country is a water-scarce country. Although the total amount of water resources in my country is 2.8 trillion cubic meters, ranking sixth in the world, the per capita annual possession is only 2,260 cubic meters, which is about a quarter of the world average (about 1 / 2 of the per capita consumption of the United States). / 6, 1 / 8 of the former Soviet Union, 1 / 58 of Canada). Moreover, the geographical distribution and temporal distribution are very uneven. The runoff in the Yangtze River Basin and the Jiangnan region accounts for 82% of the country's total; while the runoff in the Yellow River and Huaihe River basins only accounts for 10%, causing arid and semi-arid conditions in the north and causing severe water shortages in many cities. Moreover, am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/12
CPCY02W10/10
Inventor 徐又一王建华朱宝库
Owner ZHEJIANG UNIV
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