Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. X
Written by Dragoș DRĂCEA, Augustina TRONAC, Sebastian MUSTAȚĂ
Wastewater treatment plants operate with water flows and characteristics different from those considered in the design stage, the most common differences being found in carbon concentrations that are lower than those of the design, nitrogen concentrations higher than those considered and a disadvantageous C:N:P ratio. This fact means that, during the entire period of operation, decisions are needed leading to wastewater treatment process optimization. The present paper deals with methods of regulating for a nitrification and simultaneous denitrification biological reactor, based on the determinations made for nitrogen concentrations, dissolved oxygen, pH, blowing speed and results obtained related to the treatment efficiency. The analysis proves that the necessary wastewater treatment efficiency is obtained by balancing the nitrification and denitrification processes accompanied by the reduction of energy consumption through recovering oxygen from nitrates, which can be controlled by blowing speed and detecting the operation mode between sequential or continuous ones. Interpretations and conclusions can support operators in finding solutions to optimize the undertaken process.
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