Energy Technology


Potential biogas generation from food waste via anaerobic digestion [ENT06]
By Ms. Noor Hidayu Binti Abdul Rani

Pollutants are released into the atmosphere due to production and consumption energy especially from fossil. However, not only the environmental concerns but also the increase in energy demand promotes the researchers to develop new and current energy alternatives that cause zero or low negative environmental impact. Anaerobic digestion (AD) can be used for the treatment of organic wastes such as food waste, industrial organic waste, municipal solid waste, agricultural residues and animal manure. The fuel produced from anaerobic digestion is environmentally friendly because this renewable energy provides electricity without giving rise to CO2 emission. Food wastes are easily biodegradable organic material with high moisture, carbohydrate, lipid, and protein. Therefore, the objective of this study to convert the wastes into biogas and determine the properties of AD in terms of biogas generation. This study was conducted by using two digesters with different composition and the biogas was analysed using MRU analyser based on the time duration. The physicochemical properties such as total solid (TS), volatile solid (VS), ash content and moisture content were examined to determine the efficiencies of the biogas production. The highest amount of biogas production is 307 mg/m3 with addition of cow dung. Meanwhile, without cow dung, 229 mg/m3 biogas is produced. This project promotes a potential new business for biogas sector in Malaysia especially using food wastes as a main source.

Liked : 7
Question(s) : 4
The Optimization of Nitric Acid Pretreatment on Palm Oil Mill Effluent to Enhance Reducing Sugar Production [ENT11]
By Ahmad Zul Izzi Bin Fauzi

Acid pretreatment can improve the reducing sugar (RS) recovery by converting the hemicellulose contained in
cellulosic materials, such as organic wastes. In this study, nitric acid (HNO3) pretreatment was performed on palm oil mill effluent (POME) under the range of reaction time from 5 to 30 minutes, reaction temperature from 25 to 70°C, and HNO3 concentration from 0.1 to 3% w/v to determine the reducing sugar content measured by using Dinitrosalicyclic Acid (DNS) method. The Box-Behnken Design (BBD) based on Response Surface Method (RSM) was performed to determine the optimal conditions of 9.9 minutes, 65.56 °C, and 2.04% w/v HNO3 concentration. Under these conditions, 2031.73 mg/L reducing sugar was recovered, a value close to the predicted result calculated by the model. The reducing sugar recovery was improved by 13% compared to the untreated POME. Hence, the study established the importance of statistical tools to
enhance the reducing sugar output, increasing the energy conversion efficiency of the industrial wastes. 

Liked : 5
Question(s) : 2


A) Bioindustrial Technology
B) Materials Science and Technology
C) Wood and Forest Technology
D) Energy Technology
E) Environmental Technology
F) Mining and Mineral Technology
G) Agricultural Technology