Online Monitoring of an Aerobic SBR Process Based on Dissolved Oxygen Measurement

Authors:	Wimberger Dieter, UNAM, Mexico Verde Rodarte Cristina, UNAM, Mexico
Topic:	6.4 Safeprocess
Session:	Applications of Fault Detection and Isolation
Keywords:	Safeprocess, Monitoring, Sequential Batch Process, Dissolved Oxygen, Respiration Rate

Abstract

This paper presents results that enable monitoring of an aerobic sequencing batch wastewater treatment (WWT) process based on online dissolved oxygen (DO) concentration measurement. It introduces the sequential process and the DO dynamics, presents a formal discrete event system (DES) model for the traditional SBR process and a modification that enables online monitoring of the respiration rate during the reaction phase and of the oxygen transfer parameter Kla over process cycles.Finally a test method for verifying the presence of substrate in the reactor is introduced. Parts of the results have been validated with experimental data from the EOLI project.