Crizamae V. Untayao (Author)
Abstract
The importance of Calcium oxide as having a lot of uses when it comes to food and sanitation is a well-known fact. Thus, this led to the development of a prototype calcining system. Specifically, it aimed to: (1) Quantify the operating performance of the calcining system in terms of calcination time, fuel used, and percentage yield; (2) Evaluate the characteristic of calcium oxide produced by the calcining system in terms of color, odor, turbidity, ecoli and pH; and, (3) To evaluate the acceptability of the device based on its operating performance. The calcining system was fabricated in Sigma Satellite College and quantitatively measured its operating performance in three replications in the Technology Building of the Education Department. At the same time, the calcium oxide treated in water analysis was at the Agri-Aqua laboratory. Its design was quantitatively evaluated using a researcher-made evaluation sheet by 18 experts in engineering, industrial technology, and education. The system’s acceptability criteria focused on responding to technical compositions, performance, and safety issues. The qualitative evaluation of the system and sensory evaluation utilized the research-made evaluation sheet. Calcining system had a remarkable operating performance despite its simplicity in design and low cost of materials. It can withstand the heat requirement of 1000°C and produced the desired amount of calcium oxide. The percentage yield of calcium oxide varies according to the amount of fuel. It had 80% if the fuel is at 25 kilograms compared to 60% with 15 kilograms. The more consumption of fuel, the longer the calcination time, and the higher its percentage yield. The treated water analysis had 11 pH level and >25cfu/ Total Bacterial Count with no objectionable color and odor and clear turbidity. The design of the calcining system was rated “Very Acceptable” due to its simplicity, conformity to the principles of calcination, economics, functionality, and creativity.
Read the full text here.
Keywords: Calcining system, Calcium oxide, Oyster shell