Integrated MBR Sewage Treatment Equipment

Integrated MBR Sewage Treatment Equipment

Keywords: Water Treatment; Sewage Treatment; Sewage Treatment; Sewage; Water Treatment Equipment  

1. Overview

The integrated MBR (Membrane Bioreactor) equipment is an integrated device that uses membrane bioreactors for sewage treatment and reuse. It possesses all the advantages of membrane bioreactors: excellent effluent quality, low operating costs, strong system impact resistance, small sludge production, and a high degree of automation. Additionally, as an integrated equipment, it occupies a small area and is easy to integrate. It can be used either as a small-scale sewage reuse device or as a core treatment unit in larger sewage treatment plants.  

2. Working Principle

The membrane bioreactor (MBR) process is a new type of wastewater treatment technology that organically combines membrane separation technology and biotechnology. It uses membrane separation equipment to retain activated sludge and macromolecular organic substances in the biochemical reaction tank, eliminating the need for a secondary sedimentation tank. As a result, the concentration of activated sludge is significantly increased, and the Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT) can be controlled independently. Refractory substances continuously react and degrade in the reactor. Therefore, the MBR process greatly enhances the function of the bioreactor through membrane separation technology. Compared with traditional biological treatment methods, it is one of the most promising new wastewater treatment technologies currently available. Its basic structure is shown in the figure below:  

3. Equipment Performance Parameters

The core component of the integrated MBR equipment is the membrane bioreactor, and its influent water quality requirements are as follows:  

• COD < 500 mg/L  

• BOD5 < 300 mg/L  

• SS < 100 mg/L  

• NH3-N < 50 mg/L  

• Coliform count < 10,000 CFU/L  

The integrated equipment can be flexibly configured with process flows according to the raw water quality, making it widely applicable. It can directly treat domestic sewage and hospital sewage to meet the standards for domestic reclaimed water.  

Effluent water quality (meeting the standards for domestic reclaimed water):  

• COD < 50 mg/L  

• BOD5 < 10 mg/L  

• SS < 10 mg/L  

• NH3-N < 10 mg/L  

• Coliform count < 3 CFU/L  

4. Typical Process Flow

For the treatment of other types of sewage, corresponding treatment units can be added to meet the treatment requirements. For example, a pre-treatment system can be added to remove oil and residues, ensuring that the raw water entering the MBR meets its influent requirements. A post-treatment system can also be added; if the effluent needs to be reused in production processes, a reverse osmosis desalination system can be added according to the production process requirements.  

Adjustments to the treatment units can also be made based on customer needs.