Carbon Steel MBR Sewage Treatment Plant 50m3/D Integrated Sewage Treatment Equipment

Carbon Steel 50m³/D MBR Integrated Sewage Treatment Equipment SQMBR-50

The selection of sewage treatment process is directly related to the treatment effect, operating cost, and total investment of the project. Therefore, carefully selecting appropriate sewage treatment process is the key to this project. The selection of sewage treatment processes should be comprehensively considered based on various factors such as the designed inflow water quality, treatment level requirements, land occupation, and project scale. Each process has its own applicable conditions and should be determined according to the specific situation.

1. Membrane bioreactor (MBR)
Membrane bioreactor (MBR) is a new high-tech for wastewater treatment that combines membrane separation technology with biotechnology. That is to combine the membrane treatment process with the traditional activated sludge method, replacing the secondary sedimentation tank in the traditional activated sludge method with membrane components, utilizing the efficient interception effect of the membrane for solid-liquid separation, thus forming the membrane bioreactor sewage treatment process. This is a new and efficient sewage treatment process. In the field of sewage treatment, it has attracted attention and is considered one of the most developed high-tech technologies in the world in the 21st century. The wastewater treated by MBR can be directly reused. The effluent quality is good and stable, not only able to completely remove suspended solids, but also able to remove almost all bacteria and viruses. The turbidity of the produced water is close to zero, and the removal rate of major pollutants is high. Throttling and emission reduction are achieved, achieving sewage resource utilization.
2. Advantages of MBR
(1) The efficient solid-liquid separation technology ensures that the separation effect is much better than that of ordinary secondary sedimentation tanks, and can completely remove suspended solids from the effluent. The effluent turbidity is close to zero, and the produced water quality is good and stable. The produced water can be directly reused.
(2) Due to the integration of traditional sewage treatment aeration tanks and secondary sedimentation tanks by MBR, the floor area is significantly reduced and civil engineering investment is saved.
(3) The high sludge concentration and long sludge age of the biological treatment unit greatly improve the degradation efficiency of difficult to degrade organic matter. Meanwhile, due to the adsorption effect of activated sludge, the removal rate of the main pollutant (COD) can reach 90%.
(4) Due to the interception effect of the membrane, nitrifying bacteria are completely trapped in the bioreactor and reproduce, enhancing the nitrification ability of the system and improving the removal of pollutants such as nitrogen and phosphorus.
(5) The reactor operates at low organic loading rates, resulting in a much lower amount of residual activated sludge compared to traditional process methods, without sludge bulking and reducing the disposal cost of excess sludge.
(6) The system achieves automatic control, convenient operation and management, and low noise.
3. Specific process flow of mbr integrated sewage treatment equipment
Based on the principles of good treatment effect, low operating cost, and low investment, the specific process flow of this design is as follows:

4. Process description of mbr integrated sewage treatment equipment
The anaerobic+anoxic+aerobic+MBR membrane treatment process adopted in this design has been widely applied in domestic sewage treatment, with the following main characteristics:
1. After passing through the grid, domestic sewage flows into the regulating tank by itself. Due to the significant changes in the water quality and quantity of the sewage, it needs to be regulated through the regulating tank for water quality and quantity.
2. The anaerobic/aerobic process is the simplest enhanced biological phosphorus removal process composed of anaerobic and anaerobic zones. The reflux activated sludge is returned to the anaerobic zone. Under anaerobic conditions, the phosphorus accumulating bacteria in the sludge are suppressed and release phosphate in the body, generating energy to absorb and rapidly degrade organic matter, and convert it into PHB (poly β Hydroxybutyl acid) is stored. Then the mixed liquid enters the aerobic zone, and the PHB stored by the phosphorus accumulating bacteria during the degradation of aerobic conditions generates energy for cell synthesis and phosphorus absorption, forming high concentration phosphorus containing sludge that is discharged from the system along with the remaining sludge, thereby achieving the goal of biological phosphorus removal.
Under conditions with sufficient sludge age, BOD5 is degraded in an aerobic tank while also completing nitrification reaction.
On the system, this process is the simplest phosphorus and nitrogen removal process. Under the conditions of alternating anaerobic, anaerobic, and aerobic operation, it can inhibit the proliferation of filamentous bacteria, overcome sludge bulking, and make the SVI value generally less than 100, which is conducive to sludge water separation. Only agitators are installed in the anaerobic and anaerobic sections. Due to the strict separation of anaerobic, anaerobic, and aerobic zones, it is beneficial for the reproduction and growth of different microbial communities, resulting in good nitrogen and phosphorus removal effects.
The biological contact oxidation (aerobic tank) method involves the installation of fillers in the biological tank. Due to the large specific surface area of the fillers and the good oxygenation conditions in the tank, the biomass per unit volume in the biological contact oxidation tank is higher than that in the activated sludge aeration tank and biological filter tank. Therefore, the biological contact oxidation tank has a high volumetric load; By utilizing the nitrifying bacteria and denitrification bacteria cultivated in the system, the goal of removing carbon containing organic matter and ammonia nitrogen in wastewater is achieved. Compared with adding a denitrification tertiary treatment system after ordinary activated sludge treatment, it has the advantages of low infrastructure investment, low operating costs, low power consumption, and less land occupation.