Completely mixed aeration tank and push-flow aeration tank process characteristics what are the similarities and differences

One: push-flow aeration tank: principle: 1. The aeration tank is push-flow, wastewater and reflux sludge from the same end into the sludge, organic matter and sludge in full contact with the direction of the operation down. 2. Sludge manager to logarithmic → equilibrium, and even to the senescence period, the completion of adsorption and metabolism

Features: Advantages:

1. good treatment results.

2. Flexible degree of wastewater treatment, can be high or low.

Drawbacks:

Disadvantages:

Disadvantages

1. Oxygen demand is large before and small after, resulting in an anoxia in the front section and an excess in the back section

2. In order to avoid the front section of the corroboration of the oxygen, the concentration of the entering concentration can not be high. If V rises, Nr falls infrastructure costs rise.

Two: complete mixing aeration tank: principle: sewage hopper reflux sludge and the original mixture is fully mixed, is a circular flow. In the aeration tank basically complete the degradation of organic matter has not been separated from the treated water

Features:Advantages

1. Dilution is good, the impact of water quality fluctuations is small, strong impact resistance, so adapted to the treatment of industrial wastewater.

2. Able to treat high concentration wastewater without dilution.

3. All points in the pool are in the same condition and can be completely controlled in good or optimal condition.

4. Uniform oxygen demand, saving power.

5. It is a flexible method of sewage treatment. f/m can be adjusted, aeration and sedimentation tanks can be divided or combined

Disadvantages:

1. Continuous effluent may produce short flow

2. Possible sludge expansion.