Toxicity-based consents

Respiration rate of activated sludge has been recognised as a key controlling element in the modelling of process control. by the International Water Association Task Group. Actual respiration rate of the sludge in the aeration tanks. as well as the endogenous and maximum respiration rates are variables that indicate the rate of BOD removal and aeration requirements. The maximum respiration rate is also closely linked to the Critical Oxygen Concentration point. that is. the point at which diffusion over the bacterial cell walls ceases and therefore biodegradation is significantly compromised

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