Microbial optimum PH

Microbial activity and metabolism are closely related to pH value. The pH range of most microorganisms is 4.5-9, while the optimum pH range is 6.5-7.5. When the pH is lower than 6.5, fungi begin to compete with bacteria, and when the pH is 4.5, fungi will take full advantage in the biochemical tank, which will seriously affect the settling result of sludge. When pH is above 9, the metabolic rate of microorganisms will be hindered.

The range of pH requirements for different microorganisms is different. In aerobic biological treatment, pH can vary between 6.5 and 8.5; In anaerobic biological treatment, the pH requirements of microorganisms are relatively strict, and the pH should be between 6.7 and 7.4.

Usually the PH will be adjusted in the conditioning tank, but also will use a Submersible mixer so that the influent PH is uniform and stable.