Main equipment of MBR system

What equipment does the MBR system consist of?

In order to prevent the diaphragm from clogging, a fine grille needs to be installed in the pre-treatment process section of the MBR equipment. It is recommended that the grille gap is 1.0~2.0mm.

MBR basically operates at a fixed flow rate, and a regulating pool is set up to adapt to changes in flow rate. The size of the regulating tank depends on the size of the raw water flow, the flow fluctuation range, and the water treatment capacity of the membrane separation device.

The membrane tank in which the membrane module is placed is called a “membrane separation tank”. The membrane separation tank in the integrated MBR system can also be used together with the aerobic tank. When the sludge concentration in the membrane separation tank is the highest, it is most appropriate to discharge the remaining sludge from the tank.

The production tank that stores produced water can also be used as a backwash tank. The produced water can be disinfected by adding an appropriate amount of sodium hypochlorite (NaC1O) solution according to actual water quality requirements before use or discharge.

Store special NaC1O and acid cleaning solutions for chemical cleaning of membrane modules. NaCIO can accelerate decomposition and produce chlorine gas when exposed to high temperature light, so it needs to be placed in a cool place or away from sunlight.

A water tank for diluting NaC1O and acid cleaning solutions to store water. The stored water can be municipal tap water or MBR produced water (clear water tank).

A pump used to draw produced water when the membrane module is running. At startup, install suction equipment such as a vacuum pump that sucks out the air in the pipes. You can also use a pump other than self-priming. A flow valve is installed on the drainage cavity side of the self-priming pump to control the flow electrically to achieve quantitative operation.

Perform backwashing of the MBR component to restore membrane flux. Select backwash pump specifications based on backwash water volume and backwash pressure. The backwash pressure is generally controlled at 0.030-0.075MPa, the backwash flux is 25-35L/m2h, and the backwash frequency is 1 minute every 2-4 hours.

It provides oil-free compressed air required for biochemical reactions to the MBR membrane pool and a blower that provides scrubbing air source power to the membrane fiber surface. The air volume of the blower is selected based on the water depth of the membrane pool, the amount of air required for biochemical reactions, and the membrane area.

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