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Batch type integrated membrane bioreactor

A membrane bioreactor and sequencing batch technology, applied in the field of environmental engineering, can solve the problems of poor effluent quality, difficult operation and control, and high energy consumption, and achieve the effects of strong nitrogen and phosphorus removal capabilities, convenient operation, and simple process

Inactive Publication Date: 2003-11-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process is complex, high energy consumption, difficult to operate and control, and the effluent of this process is the supernatant of the secondary sedimentation tank, the effluent water quality is poor, and cannot be reused as reclaimed water

Method used

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  • Batch type integrated membrane bioreactor
  • Batch type integrated membrane bioreactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] The C / N ratio in domestic sewage is usually above 10:1. At this time, the time relay is set to switch every hour. If the C / N ratio of the influent water is lower than 10:1, the cycle period will be extended.

[0015] The air blower (1) and the suction pump (4) start synchronously. At this stage, only water is discharged, and no water is taken in. The water level of the reaction tank (9) drops, which is an aerobic stage. After 1 hour, controlled by the time relay, the air blower (1) and the suction pump (4) stop running, and at the same time, the lifting pump (2) and the mixer (3) start synchronously. The lift pump (2) feeds water with a large flow rate, and the water level of the reaction tank (9) is restored to the highest water level in the shortest possible time. The stop of the lift pump (2) is controlled by the liquid level controller. This is anoxic and anaerobic. oxygen stage. After 2 hours, the mixer (3) is controlled by the time relay to stop, and simultaneous...

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Abstract

The present invention is characterized by that in same reaction pool the aerobic, anoxic and anaerobic three environments can be implemented to fully remove nitrogen and phosphorus pollutants. The air blower and dump pump are synchronously started, its aerobic stage can implement degradation of organic material, amino nitrogen nitration and excess phosphorus adsorption, the time relay can be used for controlling air blower and dump pump to make them stop operation, at the same time the lifting pump and stirring machine are started, said lifting pump can intake water in large flow rate to provide full carbon source for denitrification, and a level controller is used to control its stop.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, relates to sewage treatment and reclaimed water technology, in particular to a method for realizing the denitrification and dephosphorization functions of a membrane bioreactor process. Background technique [0002] my country is one of the 13 water-poor countries in the world. In order to save precious water resources, reuse of reclaimed water is one of the effective ways. Studies at home and abroad have proved that the membrane bioreactor process that combines membrane filtration and biodegradation is an efficient and practical technology for sewage treatment and reclaimed water reuse, but the membrane bioreactor has insufficient nitrogen and phosphorus removal capabilities to meet Increasingly stringent water quality requirements. [0003] Recycled sewage with high nitrogen and phosphorus content will cause the following main hazards when it is reused in industrial cooling w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/12C02F3/30
CPCY02W10/10
Inventor 张捍民杨凤林张兴文
Owner DALIAN UNIV OF TECH
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