Abstract
A preliminary stage in developing numerical simulations of a biological process for wastewater treatment consists in evaluating the kinetic parameters of the studied process. The study shows results obtained by experimental and numerical evaluation of mixed microalgae-bacteria granules kinetical parameters. The results showed that operational parameters modulated the main kinetic parameters of biological processes involved in removal of organic load and nutrients from wastewater such as biomass production coefficient, endogenous decomposition rate, specific peak rate of growth, semisaturation constant, specific rate of nitrification and the specific denitrification speed. These key parameters were determined over time to evaluate the performance of microbial populations in microalgae-bacteria granules in different operational conditions. Tests have been carried out for various wastewater compositions to determine the versatility and adaptability of the technology.
Highlights
A preliminary stage in developing numerical simulations of a biological process for wastewater treatment consists in evaluating the kinetic parameters of the studied process
The monitored operational parameters modulated were: Y - biomass yield coefficient; kd – decay coefficient; μmax, maximum growth rate; Ks - the semisaturation constant; qN - the specific nitrification rate; qD - the specific denitrification rate
Evaluation of the specific biomass yield (Y) and decay rate were essential for analyzing the potential biomass production during biological processes from the active microalgae-sludge symbiotic aggregates
Summary
Laboratory tests were designed to evaluate the influence of operational parameters on the balance between microalgae and bacterial species in granules. The monitored operational parameters modulated were: Y - biomass yield coefficient (ratio between formed biomass and consumed substrate); kd – decay coefficient (decomposed biomass during endogenous respiration reported on time); μmax, maximum growth rate; Ks - the semisaturation constant; qN - the specific nitrification rate; qD - the specific denitrification rate. The test was performed in two photobioreactors operated in sequential batch mode (Feed-Reaction-SedimentationEvacuation) during successive cycles of 24 hours (Table 1). The treatment process was carried out in the absence of an external aeration source, the oxygen required for the aerobic metabolic processes being supplied exclusively through photosynthesis by the photoautotrophic microalgae in the light phase
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
