ABSTRACT
A few industries, such as the beverage industry, have experienced some growth in sales during the COVID-19 pandemic. Globally, beverage companies alone generate over 200 million tonnes of biomass annually, which largely ends up as animal feed or in landfills. With the UK government's commitment to reduce its carbon footprint by at least 68% in 2030, many companies, especially small and medium enterprises (SMEs), are exploring options to reduce carbon emissions and develop roadmaps to become carbon neutral. It has thus become imperative for beverage companies to find value in or repurpose their waste. This paper unlocks the potential for improving the fuel properties of beverage waste through a blending process and explores the determination of optimal fractions for the blends via characterization. With an initial moisture content of 82 and 58 wt.% brewery spent grain (BSG) and spent coffee grounds (SCG), respectively, the pre-treatment process reduced moisture content by approximately 10-15 wt.%. The study concludes that biomass blending improved the fuel properties of the biomass, providing a competitive comparison with coal for energy applications.
ABSTRACT
Safe silk washing is an issue faced by its users for long because silk is prone to get damaged during conventional washing. The current study focused on the possible Antheraea assamensis (Muga) silk washing formulation which was a rare event until people realized the importance of cleaning and hygiene with the onset of covid-19 pandemic. Kolakhar, lemon (citrus) juice, and some commercially available washing products were studied for bond changes by FTIR, surface changes by SEM and colour deviations from control samples. The study showed that there was formation of new bands in all treated samples (except water wash) between 1513-1518 cm-1 that is attributed to beta-sheets;and 1698-1703 cm-1 linked with beta-turn conformation in all the treatments. The morphological observation illustrated fibrillation and peeling off fibers in the commercial washed fabrics. Colour change (E) was least in fabric conditioner (0.85) < citrus wash (1.06) < Kolakhar wash (1.13) and maximum for fabric whitener (5.46). Overall, the traditional agents proved excellent washing factor and has the potential in opening a window for optimized formulation that can be employed for Muga washing.
ABSTRACT
To date, irregularity and lack of power supply remain a global problem in the rural areas of underdeveloped and developing countries. This paper proposes a new concept for rural electrification by using palm oil mills to co-produce biodiesel from sludge palm oil. We performed a case study based on a medium-sized palm oil mill in Central Kalimantan. Approximately 2.5 tonnes of biodiesel could be produced daily using an enzymatic batch process and potentially support around 1,375 households of 4 people each in the surrounding areas. Subsequently, we performed a techno-economic assessment to study the commercial feasibility of the concept for rural electrification using the enzymatic biodiesel as opposed to commercial diesel. A 10% price deduction was applied to incentivize the local community to use the co-produced biodiesel. From our analysis, the rural electrification concept was found to be commercially viable with a return on investment of 29% and a breakeven period of less than 4 years of operation. Barring the short-term impacts of the COVID-19 pandemic and the price fluctuations of diesel and crude palm oil, the long-term commercial prospect of this rural electrification concept is attractive as it financially benefits both the rural community and the mill operators.
ABSTRACT
The aviation industry is responsible for 12% of transport-related GHG emissions and 2-3% of the global GHG emissions, thus raising concerns for sustainable alternatives such as aviation biofuels. This study sought to analyze the potential of producing aviation fuel from rubber seed oil. Rubber seed oil (RSO) was extracted and the physicochemical properties investigated as well as the fatty acid composition. This result was simulated in ASPEN plus to determine the potential aviation biofuel produced using the UOP HEFA process. The study shows that the golden yellowish oil derived from rubber seed possessed a density 0.9 g/cm3 and pH of 6, refractive index of 1.48, heating value of 23.75 MJ/kg and composed of 75% area of FFA with Oleic and Linoleic acid been the most dominant. The HEFA process on ASPEN Plus showed 81% of feedstock was converted to hydrocarbons with aviation biofuel yield of 46%. It was estimated that the installation of the plant for aviation biofuel production has a total capital cost of $ 8,650,480 and a total operation cost of $ 328,728. The economic analysis shows that at a cost of USD 4/kg (USD 3.01/liter) of aviation biofuel has an Internal rate of return of 18.62% profitability of 1.18 and payback period of 14.9 years of the plant operating. This study established that rubber seed oil shows suitability and potential for sustainable aviation biofuel production.