20 documents found, page 1 of 2

Flow dynamics studies in the NETmix reactor for a large range of flowrate ratio...

The mixing dynamics that occur inside the NETmix reactor have been previously thoroughly studied for equal feed streams distributed through the inlets. To broaden the applicability of this static mixer, this work intends to expand the knowledge of the mixing dynamics mechanisms for cases where dissimilar inlet flowrates are imposed. Computational Fluid Dynamics (CFD) tools were used to simulate flow dynamics ex...

Selective electrochemical oxidation of organic compounds in a mass transfer-enh...

e(-)NETmix stands as an electrochemical flow reactor engineered to enhance mass transfer. This study aimed at assessing the performance of the e(-)NETmix reactor in the realm of organic electrosynthesis. Specifically, the research focused on the selective electrochemical oxidation of 4-methoxybenzyl alcohol (4-MBA) to p-anisaldehyde (PAA) using a bare fluorine-doped tin oxide (FTO) anode. The efficiency of the ...

Innovative waste activated sludge pre-treatment using a raceway pond Reactor: I...

A novel pre-treatment, using a raceway pond reactor (RPR), combining the use of thermal and solar effects, was applied to enhance anaerobic digestion (AD) of waste activated sludge (WAS) from an urban wastewater treatment plant. Thermal pre-treatment at 25, 50, 60 and 70 degrees C was carried out for 5 h with (under distinct values of UV radiant power) and without solar radiation and varying WAS depth in the RP...

Kinetic model implementation in raceway pond reactors with hydrodynamic and rad...

Vertical mixing plays a critical role in solar-driven processes using raceway pond reactors (RPRs). However, incorporating the time history of radiation for each fluid element is still an open issue. This work aims to develop an effective methodology using Computational Fluid Dynamics (CFD) tools that couples hydrodynamics and radiation fields into kinetic models of biomass growth or cell lysis enhanced from ra...

Tubular photobioreactors illuminated with LEDs to boost microalgal biomass prod...

This work proposes distinct configurations for tubular photobioreactors (PBRs) illuminated with specific and adequate light wavelength provided by LEDs. The PBRs are characterized by an involute/flat reflective surface around/below a cylindrical borosilicate glass tube that is illuminated by a LEDs panel located above. Reflectors can enlarge the absorber tube's illuminated area, enabling a uniform (spatial and ...

Assessing the potential of microalgae for nutrients removal from a landfill lea...

Leachates treatment relies on the adoption of a multi-barrier strategy, involving primary, secondary, and tertiary processes. Due to their ability to grow in a wide variety of environmental conditions, and their nutritional requirements, especially in terms of nitrogen and phosphorus, microalgae appear as a promising alternative for the tertiary treatment of landfill leachates. Despite these advantages, only a ...

Microalgal Growth in Paper Industry Effluent: Coupling Biomass Production with ...

Paper and pulp industries produce effluents with high phosphorus concentrations, which need to be treated before their discharge in watercourses. The use of microalgae for this purpose has attracted the attention of researchers because: (i) microalgae can assimilate phosphorus (one of the main nutrients for their growth); and (ii) growing on effluents can significantly reduce the costs and environmental impact ...

Microalgal growth and nutrient uptake in heavy metals polluted environments

Outdoor Cultivation of the Microalga Chlorella vulgaris in a New Photobioreacto...

Microalgae can be a future source of biomass with a wide range of applications, including its use to solve current environmental issues. One of the main variables for microalgal cultivation is the light supply: (i) its intensity that often does not present a uniform spatial distribution inside the culture; (ii) photoperiod; and (iii) spectrum. Therefore, this study aims to evaluate the growth of the microalgae ...

Insights on sulfamethoxazole bio-transformation by environmental Proteobacteria...

Although sulfonamide residues are frequently reported as freshwaters contaminants, information on the ability of native bacteria to modify these synthetic antibiotics is scarce. Our purpose was to investigate the potential of bacteria from different aquatic environments to cleave or transform sulfamethoxazole (SMX) and infer on their ability to reduce the toxicity of this antibiotic. From a collection of about ...