Method for treating organic wastewater through dynamic membrane anaerobic-aerobic integration

A technology of organic wastewater and dynamic membrane, applied in aerobic and anaerobic process treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of low efficiency, high investment cost, large equipment footprint, etc. problems, achieve the effect of increasing concentration, low investment cost, and small footprint

Active Publication Date: 2013-11-27
XIAMEN HUANKANG ENVIRONMENTAL PROTECTION TECH
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a dynamic membrane anaerobic-aerobic integration that is more efficient and economical for organic wastewater in view of the problems of low efficiency, large equipment footprint, and high investment cost in the existing organic wastewater treatment. Methods of Treating Organic Wastewater

Method used

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Examples

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Embodiment 1

[0028] see figure 1 , the present invention comprises the following steps:

[0029] 1) The raw wastewater enters the first-level aerobic tank 1 through the water inlet A, and the first-level perforated aeration tube 2 is installed inside the first-level aerobic tank 1, and the external air compressor 3 is blown and aerated to The rotameter 4 controls the aeration rate, and the sludge is discharged from the bottom of the first stage aerobic tank 1 (in figure 1 Indicated by the mark C); the first-stage aerobic pool 1 can operate at a temperature of 10-35°C; the aeration rate can be controlled at 0.5-5L / min, and the first-stage aerobic pool 1 The dissolved oxygen can be DO≥2.0mg / L.

[0030] 2) The waste water treated by the first-stage aerobic pool 1 flows into the first-stage anaerobic pool 6 through the first-stage dynamic membrane 5, and the first-stage stirring device 7 is set in the first-stage anaerobic pool 6. Level 6 bottom sludge discharge of anaerobic tank (in figur...

Embodiment 2

[0037] Similar to Example 1, the difference is that the influent COD concentration is 408 mg / L, and according to the influent organic load, the domestic sewage is successively distributed in the first-stage aerobic pool 1, the first-stage dynamic membrane 5, and the first-stage anaerobic pool 6. The second-level dynamic membrane 8, the second-level aerobic tank 9, the third-level dynamic membrane 11 and the second-level anaerobic tank 12 are biodegraded, and the COD, SS, and DO of the water in each pool are measured at different degradation times , pH value, temperature and other indicators, among which the COD concentration in the effluent is 22mg / L, and the COD removal rate is 94.6%.

Embodiment 3

[0039] Similar to Example 1, the difference is that the influent COD concentration is 456mg / L. According to the organic load of influent, the domestic sewage is sequentially distributed in the first-stage aerobic pool 1, the first-stage dynamic membrane 5, and the first-stage anaerobic pool. 6. The second-level dynamic membrane 8, the second-level aerobic tank 9, the third-level dynamic membrane 11 and the second-level anaerobic tank 12 are biodegraded, and the COD, SS, and DO of the water in each pool are measured at different degradation times , pH value, temperature and other indicators, among which the concentration of COD in the effluent is 28mg / L, and the removal rate of COD is 93.8%.

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Abstract

The invention discloses a method for treating organic wastewater through dynamic membrane anaerobic-aerobic integration, and relates to a wastewater treatment method. The original wastewater enters a first-stage aerobic tank in which a first-stage perforated aeration pipe is arranged, an external air compressor is used for blast aeration, the aeration amount is controlled by a rotameter, and sludge is discharged from the bottom of the first-stage aerobic tank; the wastewater flowing through the first-stage aerobic tank flows into a first-stage anaerobic tank through a first-stage dynamic membrane, a first-stage stirrer device is arranged in the first-stage anaerobic tank, and sludge is discharged from the bottom of the first-stage anaerobic tank; the wastewater flowing through the first-stage anaerobic tank flows into a second-stage aerobic tank through a second-stage dynamic membrane, a second-stage perforated aeration pipe is arranged in the second-stage aerobic tank, an air compressor is used for blast aeration and sludge is discharged from the bottom of the second-stage aerobic tank; and the wastewater flowing through the second-stage aerobic tank flows into a second-stage anaerobic tank through a third-stage dynamic membrane, a second-stage stirrer device is arranged in the second-stage anaerobic tank, sludge is discharged from the bottom of the second-stage anaerobic tank, and the wastewater reaching the standard is discharged through a water outlet of the second-stage anaerobic tank.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a dynamic membrane anaerobic-aerobic integrated treatment method for organic wastewater. Background technique [0002] With the rapid development of industrial technology, high-concentration organic wastewater in printing and dyeing, chemical, food, paper and other industries has become one of the problems that need to be solved urgently in the field of sewage treatment. At present, domestic and foreign organic wastewater treatment technologies mainly include physical methods, chemical methods and biological methods, among which the most widely used and technically dominant method is biological treatment. In recent years, wastewater biological treatment technology has changed from the traditional single anaerobic method and aerobic method to anaerobic-aerobic combined treatment methods, such as anaerobic-aerobic method (A / O method), anaerobic-anoxic-good Oxygen method (A / A / O meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 陈瑞坚
Owner XIAMEN HUANKANG ENVIRONMENTAL PROTECTION TECH
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