This paper presents the Life Cycle Assessment (LCA) of a 640 MW combined cycle power plant located in West Java, Indonesia. The power plant adopts the dual-fuel firing system, in which both natural gas and high-speed diesel fuels are used. The LCA was performed using the open-source LCA software OpenLCA version 1.9. A functional unit of 1 kWh of electricity generation was used in calculating the environmental impacts. The system boundary was modeled using the gate-to-gate system, which includes all inputs and outputs for the following subsystems: fuel storage, water preparation, electricity production, and supporting subsystems. The life cycle inventory (LCI) used data gathered from July 2018 to June 2019. The CML-IA baseline method was used to perform the life cycle impact assessment (LCIA), providing results for ten midpoint impact categories. All impact categories were normalized using World 2000 normalization factors. The result shows that the most significant impact categories are acidification potential (AP), eutrophication potential (EP), and global warming potential (GWP), respectively. The largest acidification source is nitrogen oxide emission from the combustion chamber, with a percentage of 80.32%. Regarding the combustion stage, the post-combustion method is recommended to remove nitrogen oxide from exhaust gases to lower the AP impact category.
Waste management and domestic liquid waste residual household activities such as bathing, washing, and defecation were not done well along the Ciliwung river, causing water quality to decline. Residents of Kampung Tanah Rendah, Kampung Melayu, East Jakarta, is still free-throw garbage and domestic household waste into the Ciliwung River. Waste management is not unified and usually carried by an individual or group by using the tool carrier in the form of a cart. Waste transportation costs are paid by the voluntary contributions of citizens. Most residents do not have bathroom facilities at home are reluctant to use latrines and still perform a routine to defecate on a bamboo raft floating raft river or familiarly called. Inspired by the citizens raft (getek) used for bathing, washing and activity, defecation, trash, and interact in Ciliwung, people consisting of adults and children are invited to get to know various kinds of water pollution. Adopting an idea of things that a citizen of the existence of the Ciliwung River on the raft, then made a scientific introduction of alternative methods such as “Labtek Apung” that implementation can be done independently or together and anywhere. Tests conducted is a test that is based on visual and organoleptic sensory processes. Parts of organs that play a role in sensing are the eyes as senses of sight, nose, and tongue as the sense of smell as a sensory taster. The scope of experiments on various kinds of water in the village is a test of physics, chemistry, and biological simple to use tools and materials that are easily found in the home. Simple physics test to see the physical shape, smell, color, and taste of the water. Simple chemical testing to see on the water hardness using the tea and simple biological test is performed to determine the existence of microorganisms that live in the water. The introduction of scientific alternatives to the residents, especially the children through these activities, would make scientific terms such as levels of turbidity, acidity, disorders of harmful microorganisms that normally can only be understood by most people with a specific background in the laboratory, to be made easier to understand. It is expected that after this event took place, residents are targeted to raise awareness of environmental problems that occur.
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