BIO4Africa research publications

The BIO4Africa partners are conducting a wide range of research studies. The objective is to investigate the nutritional potential and functional properties of agricultural waste products and the optimal setup and processing steps for bio-based technologies in local contexts. These findings are then used to optimise the pilot trials at our test sites.

Here you can find an overview of the studies that have been published in international journals to date. Click on the images to view the literature.

Hydrothermal carbonization of Typha australis: Influence of stirring rate

Omar M. Abdeldayem, Md Abdullah Al Noman, Capucine Dupont, David Ferras, Lat Grand Ndiaye, Maria Kennedy. Environ Res. 2023 Nov 1;236(Pt 2):116777. doi: 10.1016/j.envres.2023.116777. Epub 2023 Jul 28. PMID: 37517487.

 

Abstract

According to existing literature, there are no conclusive results on the impact of stirring on hydrothermal carbonization (HTC); some studies report a significant impact on the product's properties, while others indicate no influence. This study investigates the influence of stirring rate on several responses and properties of HTC products, including solid mass yield, solid carbon fraction, surface area, surface functional groups, morphology, and the fate of inorganic elements during HTC. Waste biomass was introduced as a feedstock to a 2 L HTC reactor, where the effects of temperature (180-250 °C), residence time (4-12 h), biomass to water (B/W) ratio (1-10%), and stirring rate (0-130 rpm) were investigated. The findings of this study conclusively indicated that the stirring rate does not influence any of the studied responses or properties of hydrochar under the selected experimental conditions used in this study. Nevertheless, the results indicated that a low-stirring rate (5 RPM) is enough to slightly enhanced the heating-up phase of the HTC reactor. For future research, it is recommended to examine the impact of stirring rate on the HTC of other types of biomass using the methodology developed in this study.