Energy valorization of bio-waste applied to buildings in Algeria

KETHIRI, Mohamed-Aymen (2025) Energy valorization of bio-waste applied to buildings in Algeria. Doctoral thesis, Faculté des Sciences et de la technologie.

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Abstract

In the pursuit of sustainable and environmentally friendly practices, effective biowaste management has become a crucial imperative, especially in the context of the built environment. In the context of growing global trends related to energy security, environmental degradation and climate change. Through a multidisciplinary perspective, this thesis seeks to bridge the fields of waste management, materials science, renewable energy or renewable materials and sustainable architecture, providing a holistic perspective on the exploitation of biowaste for the benefit of the Algerian community and the planet at large. The potential of using date palm leaflet (DPL) as a green composite reinforcement in construction materials. An experimental study was conducted to understand the main characteristics of DPL. The work was divided into two main axes, (i) a physicochemical characterization of date palm waste (ii) a mechanical and thermophysical characterization on a composite reinforced with date palm waste (gypsum/date palm). A series of analyses were performed, such as scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis, to evaluate the physical properties of the fibers, including apparent and absolute densities, specific porosity and detailed morphological characteristics. In addition, the chemical composition of these fibers was meticulously examined by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The thermal properties were characterized by thermogravimetric analysis (TGA). The second part of the research work focuses on the study of the impact of date palm leaflet powder (DPL) on the thermal and physico-mechanical properties of gypsum mortars. A series of mortar compositions were prepared with different proportions of DPL (0, 1, 3 and 5% w/w binder) and different particle sizes (0.5, 1 and 1.5 mm). This study provides valuable information on the use of sustainable and renewable building materials, highlighting the benefits of exploiting agricultural waste in the construction sector. The results lay the foundation for future research and innovations in the field of environmentally friendly construction technologies. This study advocates and promotes the use and valorization of date palm waste in building materials for building applications in Algeria

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