Hajjar Hartini Wan Jusoh¹, Nor Azman Kasan^2,*, Hidayah Manan², Nurfarahana Mohd Nasir^1,3, Fareza Hanis Mohd Yunos¹, Sofiah Hamzah¹, Ahmad Jusoh^1,2,*

Journal of Renewable Materials, Vol.11, No.5, pp. 2321-2332, 2023, DOI:10.32604/jrm.2023.026086

Abstract Implementation of biofloc technology (BFT) system in aquaculture industry shows high productivity, low feed conversion ratio, and an optimum culture environment. This study was divided into two phases. The first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture water. The second phase examined the performance of harvesting biofloc (remaining phytoplankton and suspended solids in the system) using chicken eggshell powder (CESP). This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia (>99%) with a remaining ammonia concentration of 0.016 mg L⁻¹ and 0.018… More > Graphic Abstract

Omojola Awogbemi^1,*, Daramy Vandi Von Kallon¹, Victor Sunday Aigbodion^2,3

Journal of Renewable Materials, Vol.10, No.8, pp. 2217-2246, 2022, DOI:10.32604/jrm.2022.019152

Abstract Chicken eggshell is one of the most common wastes generated from households, restaurants and other food processing outlets. Waste Chicken Eggshells (WCES) also constitutes an environmental nuisance and ends up discarded at dumping site with no consideration of further usage. The main constituent of WCES is calcium carbonate from which calcium or calcium oxide can be extracted for various applications. This current effort reviews recently published literature on the diverse applications of WCES. The considered utilization avenues include catalysts for biofuel production, construction industry, wastewater purification, industrial sector, food industry, medical, and agricultural applications. The specific areas of application apart… More > Graphic Abstract