Like the others state, there ...
Published by Don Sharpe
Like the others state, there is insufficient information to be able to advise you! If you would like to provide information such as do you have a DAF unit first? Is there an anoxic zone prior to the aeration zones? What is the MLSS level in each stage? What is the COD after each stage? But in a plant such as this, if it was in the UK, I would want to visit site and sample the bacteria, which I would examine, carry out oxygen levels on the plant and carry out various other tests?