Daut, Nadzirah Muhamad
(2024)
Environmental Impacts And Energy Consumption Of Waste Lubricant Oil Recovery System By Life Cycle Assessment.
Masters thesis, Universiti Sains Malaysia.
Abstract
The waste lubricant oil recovery process can have significant environmental impacts due to material and energy inputs, which can be evaluated through Life Cycle Assessment (LCA). However, research in this area is limited. This study addressed the gap by quantitatively analyzing the environment impacts and energy consumption of three waste oil categories: SW 305 (Spent Lubricating Oil), SW 306 (Spent Hydraulic Oil) and SW 307 (Spent Mineral Oil-Water Emulsion). The study utilized operational data from a waste oil recovery facility in Seberang Perai, Pulau Pinang, covering January to June 2023. Using the ReCiPe 2016 method in OpenLCA, the environmental impacts on human health, ecosystem quality, and resource availability were assessed for 13,000 liters of each waste oil. Characterization revealed significant variations among the waste oils. SW 306 and SW 305 had more consistent properties, facilitating stable recovery process, while SW 307 required specialized treatment due to higher water content, lower viscosity, and higher density. In terms of human health impacts, SW 305 generally had higher impacts, except for human non-carcinogenic toxicity (HNT), where SW 306 was higher. SW 307 consistently showed the lowest impacts, making it the least harmful for human health. Regarding ecosystem quality, SW 305 had higher impacts in most categories, except for terrestrial ecotoxicity (TE) and freshwater eutrophication (FE), where SW 306 was more harmful. SW 307 again showed the lowest impacts, indicating it was the least harmful to the environment.
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