MBBR bio media influence factor control
1.The temperature biofilm reactor system should be operated at 15°C~35°C.
2. Dissolved oxygen is an important factor affecting the removal of organic matter. Especially in the case of dephosphorization and denitrification, the control of the concentration of dissolved oxygen is particularly important.
In different types of biofilm reactor processes, the mixed solution forms aerobic, anoxic and anaerobic sections in the bioreactor in various forms.
The DO control range of each section of the reaction tank is:
-Anaerobic section is below 0.2mg/L
-Anoxic section is between 0.2mg/L~0.5mg/L
-Dissolved oxygen concentration in the aerobic section should not be less than 2mg/L.
3. The sludge concentration in the aerobic zone (pool) of MLSSMBBR should be controlled within 3000mg/L~20000mg/L.
Generally speaking, when the sludge concentration in the feed liquid increases, because the sludge concentration is too high, the sludge is easy to deposit on the surface of the biofilm to form a thick sludge layer.
However, the concentration of sludge in the feed solution should not be too low, otherwise the degradation rate of pollutants will be low, and at the same time, the adsorption and degradation capacity of activated sludge for dissolved organic matter will weaken, which will increase the concentration of dissolved organic matter in the supernatant of the mixed liquid.
Therefore, it is necessary to maintain a moderate sludge concentration in the feed liquid, too high or too low will reduce the water flux.
4. PH value The pH value of the inlet water of the MBBR reaction tank should be 6-9.
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