DEVELOPMENT OF COMBINED ULTIMATE HYBRID RESPIROMETER-TITRATE METER TO ESTIMATE KINETIC PARAMETERS OF ACTIVATED SLUDGE
Keywords:
Activated sludge, kinetic, oxygen uptake rate, respirometry, titrimetryAbstract
The aim of this paper is to present a new development and an application of the ultimate hybridrespirometer-titrate meter for wastewater characterization and kinetic parameters estimation ofmicroorganisms in activated sludge. Currently, respirometry and titrimetry are considered highperformance tools with accuracy and frequency measurement. A new implementation of ultimatehybrid respirometer combined with titrate meter was developed. The new set-up of instrument wasdeveloped based on the previous knowledge and needed only sensor electrodes. The user interfaceprogramming to system control and monitor was developed based on LabVIEW 8.2 (student edition)software packages equipped with NI DAQ USB-6210 (A/D 16 bit). Finally, a laboratory implementationwas tested with readily biodegradable substrate, such as sodium acetate and ammonium chloride, toestimate the essential kinetic parameters of heterotrophic as yield, maximum specific growth rate, decayrate, saturation constant for substrate and initial ammonium concentration in activated sludge samples.The parameter estimation results from using respirometric measurements data were close to the defaultvalues in Activated Sludge Model No. 1 (ASM1) and other reported values. The ammonium concentrationcalculate by using base information were much correlated with the amount of ammonium applied to theactivated sludge sample. This demonstrated that the new instrument set-up was successfully applied toestimate kinetic parameters of activated sludge and measurement of ammonium concentration inactivated sludge samples.
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