Why does my aeration tank foam?

Why does my aeration tank foam?

Air in the aeration unit, nitrogen gas that is produced during denitrification in anaerobic conditions, methane and carbon dioxide that is produced in anaerobic digesters may cause foaming in units (Hug 2006).

How do I get rid of nocardia?

For Nocardia foams, surface spraying of a 50 mg/L chlorine solution can be effective. Both these filaments grow on grease and oil. Systems that lack primary clarification (the main grease and oil removal mechanism) appear to suffer more foaming problems.

How is MCRT calculated?

The MCRT of an activated sludge process can be calculated by dividing the pounds of suspended solids or MLSS in the activated sludge process by the pounds of suspended solids leaving the activated sludge process (Equation I. 7).

What kills foam?

Vinegar and salt are both great at reducing the foam caused by detergents for hand washing. Salt reduces the surface tension of the water which inhibits the production of suds. The dishwasher should then be forced through a rinse cycle.

How do I maintain my aeration tank?

The pH of the aeration tank should be between 6.5-8.5 to avoid stress on the microbial community and for optimal biological activity. Dissolved oxygen levels in the aeration tank must be maintained at 1-3 mg/L for effective treatment.

Is nocardia fatal?

Nocardia farcinica infections are rare and potentially life threatening. Identification is based on growth at 45°C, opacification of Middlebrook 7H10 agar, and resistance to antibiotics.

Does nocardia cause pneumonia?

Nocardia infection develops when you breathe in (inhale) the bacteria. The infection causes pneumonia-like symptoms. The infection can spread to any part of the body. People with a weak immune system are at a high risk for nocardia infection.

What is MCRT?

An expression of the average time, usually days [d], that a microorganism will spend in the activated sludge process.