Rotary disk type membrane bioreactor and its water treatment method

A membrane bioreactor and bioreactor technology, applied in biological water/sewage treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve problems such as insufficient water permeability, inconvenient installation and disassembly, and pollution. Achieve the effect of easy large-scale production, solve the problem of membrane fouling, and simple preparation

Inactive Publication Date: 2006-05-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above inventions have solved the problems of membrane fouling and air blowing energy consumption to a certain extent, but there are still defects such as the complicated structure of the membrane module, inconvenient installation, disassembly and washing, especially the water permeability is not high enough, and the strength of the membrane is very high.

Method used

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  • Rotary disk type membrane bioreactor and its water treatment method
  • Rotary disk type membrane bioreactor and its water treatment method
  • Rotary disk type membrane bioreactor and its water treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Please refer to figure 1 , figure 2 and image 3 , including raw water tank, float level valve, bioreactor, rotary membrane separator assembly, air pump, suction pump, corresponding pipes and valves. The artificial sewage is treated, and the COD value of the wastewater is 180-380mg / L. Sewage enters the bioreactor from the raw water tank, and at the same time, the air pump fills the bioreactor with air through the aeration head connected to the aeration pipe. The aeration head is located at the lower part of the membrane separator, and the aeration rate is 400L / h. The pollutants in the sewage are adsorbed by activated sludge and decomposed by microbial metabolism, and the mixed solution is intermittently accelerated and filtered out by the rotating disc membrane separator. The liquid level in the bioreactor is controlled to be constant by the float level valve. Intermittent accelerated filtration of water is realized by controlling the suction and stop of the water ...

Embodiment 2

[0028] Please refer to figure 1 , figure 2 and image 3 , using the same equipment and methods as in Example 1, except that the membrane used is changed into a microfiltration flat composite membrane. After the membrane bioreactor has been in operation for 30 days, its effluent flux is 37.5L / m 2 h, the effluent COD is less than 25mg / L, and the removal rate is greater than 90%.

Embodiment 3

[0030] Please refer to figure 1 , figure 2 and image 3 , including raw water tank, float level valve, bioreactor, rotary membrane separator assembly, air pump, suction pump, corresponding pipes and valves. The artificial sewage is treated, and the COD value of the wastewater is 180-380mg / L. Sewage enters the bioreactor from the raw water tank, and at the same time, the air pump fills the bioreactor with air through the aeration head connected to the aeration pipe. The aeration head is located at the lower part of the membrane separator, and the aeration rate is 400L / h. Pollutants are decomposed by activated sludge adsorption and microbial metabolism, and the mixed solution is intermittently accelerated and filtered out by the rotary disc membrane separator. The liquid level in the bioreactor is controlled to be constant by the float level valve. Intermittent accelerated filtration of water is realized by controlling the suction and stop of the water outlet pump through a...

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Abstract

The invention discloses a rotary film biological reactor and the method for treating water. Original water tank connects an inlet pipe with a float level valve by the first valve, the inlet pipe approaches to the biological reactor which is equipped with an aerated head connecting to gas flow counter, the second valve, and an air pump outside the biological reactor by an aerated conduit, the upper aerated head is equipped with a rotary film separator which sequentially connects to a speed-adjusting generator and a outlet pipe, the other side of the outlet pipe connects sequentially to the third valve, a vacuum pressure gauge, a water outlet sorption pump, and a pure water box, and the water outlet sorption pump connects to a time switch. The rotary film biological reactor is characterized in that the energy-consumption is low, the technique is simple, and it can keep high permeable volume. By controlling the technological parameter as aerated volume, the revolution of film separator, and the ratio of pumping-stopping, the film flux of the rotary film biological reactor can be between 37.5-56L/m2h, COD <25mg/L, and clearance of COD >90%.

Description

technical field [0001] The invention belongs to the technical field of membrane bioreactors, and in particular relates to a rotary disc type membrane bioreactor and a water treatment method thereof. Background technique [0002] Membrane Bioreactor (MBR) is a new and efficient process for wastewater treatment that combines membrane separation technology with microbiology and biochemistry. Compared with traditional biochemical wastewater treatment technologies, it has solid-liquid It has the advantages of good separation effect, high biochemical efficiency, excellent effluent quality, centralized equipment, small footprint, high sludge concentration, low sludge load, easy management and automatic control. Membrane bioreactor is mainly composed of two parts: bioreactor and membrane separator (membrane module). The bioreactor is mainly the main place for the degradation of pollutants in wastewater. The traditional bioreactor is a fully mixed activated sludge biological treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F3/34C02F9/14
CPCY02W10/10
Inventor 徐又一左丹英吴桂萍朱宝库
Owner ZHEJIANG UNIV
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