Organic and Nitrogenated Substrates Utilization Rate Model Validating in Sequential Batch Reactor

Abstract

In this paper, the validation of models for the organic and nitrogenated substrates utilization rate (SUR) in a sequential batch reactor (SBR) are proposed. The treatments tested are (1) Treatment 1: oxic, cycle duration of 24 h; (2) Treatment 2: oxic, cycle duration of 6 h; (3) Treatment 3: anaerobic-oxic, cycle duration of 24 h; (4) Treatment 4: anaerobic-oxic, cycle duration of 6 h; and (5) Treatment 5: anoxic-oxic-anoxic, cycle duration of 12 h. The novelty consists of the mathematical adjustment for each stage into the proposed treatments for SBR. The SURs of chemical demand oxygen (COD), NH4+, and TKN (total Kjeldahl nitrogen) for the Treatments T1 to T5 have given successful Radjusted2 in the calibration and validation stages and vary between 75% and 100%, allowing the estimation of these variables into the predenitrification, aeration, conventional, and simultaneous denitrification stages of SBR operation.