What causes excessive foam to be generated in the aerobic tank?
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What causes excessive foam to be generated in the aerobic tank?
1. The raw water contains a large amount of surfactants. It is caused by substances added during the production process; the foam is white, fine, light, and non-sticky. 2. It is caused by the small bubbles generated by the newly installed aeration heads, and it is a short-term effect. 3. Microorganisms reproduce and produce large amounts of lipid substances. It is caused by the natural growth and reproduction of microorganisms; the foam is muddy in color, with large bubbles that are sticky. 4. Sludge denitrification foam. When aerobic sludge stays in the secondary sedimentation tank for too long, the foam formed as a result of denitrification becomes viscous and muddy in color.
When wastewater contains synthetic detergents or other foaming substances, a large amount of foam forms on the surface of the aeration tank. Additionally, the sludge concentration in the mixed liquid within the tank is too low; the above situation may also occur at the initial stage of cultivating Mars sludge, or when the sludge concentration from the recirculation is low and the amount of recirculated sludge is small.