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Energy Audit of Sewage Treatment Plants

Abd. Rahni, Ashraf Aizzuddin (2011) Energy Audit of Sewage Treatment Plants. Universiti Teknologi PETRONAS. (Unpublished)

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The objective of this study is to conduct an energy audit of a sewage treatment plant, analyze the energy consumption and efficiency of the STP and design energy conservation measures to reduce energy consumption and cost It also serves as a continuation and monitoring of Pantai Dalam SIP's previous energy audit 2008-2010. At national level, IWK's total operating cost bas increased at a much higher rate than its total revenue. In 2009, the company's loss amounts to RM33 million. From that total, the energy cost contributes about 19%. At branch level, for 2008-2010, Pantai Dalam STP' s energy cost contributes about 56% which is much higher. This shows that energy has become one of the main contributors for their high cost, thus solutions should be identified to optimize their energy efficiency and minimize the cost. The scope of study is conducting an energy audit to analyze the energy usage of the plant. The methodologies for the energy audit are the pre-site work: plant and utility data analysis, site visit: walk-through survey and post-site work which comprises of baseline for building energy use and evaluation of energy savings measures. Finally, the findings indentifies that the largest energy user is the sewage lift pumps at the pump station, followed by the blowers, clarifiers and aeration tank. It also identifies that the previous energy audit still bas not achieved its goal of a I 0% reduction but already half-way there. Thus, further initiatives and monitoring is required in achieving it. The sewage lift pump is also identified to be inefficient and has a potential maximum savings of 34,815 kWh/month or RM8,024.86/month. Energy savings measures to achieve this is changing the speed to 90"/o, which will increase its efficiency to 80.5% and yield a saving of31,371 kWh/month or RM7,23l.02/month. Others include installing new properly sized pumps, changing the pump impellers and replacing the motor.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Energy - Energy management - Energy audits
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 12 Nov 2013 08:55
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/10446

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