Publications by authors named "Johannes Gerson Janzen"
Removal mechanisms of pentachlorophenol in a horizontal-flow anaerobic immobilized biomass reactor (HAIB) inoculated with an indigenous estuarine sediment microbiota: adsorption and biodegradation processes.
Gunther Brucha Alessandra Giordani Bárbara Franco Vieira Marcia Helena Rissato Zamariolli Damianovic Flavia Talarico Saia Johannes Gerson Janzen
Biodegradation
October 2024
Article Synopsis
- * Adsorption was the main PCP removal mechanism, showing high efficiency (86-104%) at various concentrations, while biodegradation produced toxic intermediates, with significant bacterial community impacts noted.
- * Indigenous inoculum from the Santos-São Vicente estuary and polyurethane foam were effective in enhancing both the adsorption process and the overall PCP removal, without inhibiting microbial activity.
Article Synopsis
- Floating Treatment Islands (FTIs) effectively manage stormwater by reducing floods and removing pollutants, but there's limited understanding of how well they perform in these areas.
- This study uses computational fluid dynamics (CFD) to explore the interactions within FTI systems, analyzing both pollutant removal and sediment deposition for the first time together.
- Results reveal that FTIs significantly improve mass removal rates, especially for larger sediment particles, and their position within a pond can affect removal efficiency by up to 20%, achieving over 70% mass removal for certain configurations.
This paper presents the findings from a series of computational fluid dynamics simulations to estimate the effect of scale and Froude number on hydraulic performance and effluent pollutant fraction of scaled waste stabilization ponds designed using Froude similarity. Prior to its application, the model was verified by comparing the computational and experimental results of a model scaled pond, showing good agreement and confirming that the model accurately reproduces the hydrodynamics and tracer transport processes. Our results showed that the scale and the interaction between scale and Froude number has an effect on the hydraulics of ponds.
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