Feasibility study on electric load adjustment for Rya Wastewater Treatment Plant

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dc.contributor.authorRIFAD, Abdulla
dc.contributor.authorKALLUVAYAL BHASKARAN, Sivani
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)sv
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)en
dc.contributor.examinerWilén, Britt-Marie
dc.contributor.supervisorWilén, Britt-Marie
dc.date.accessioned2024-12-20T14:31:32Z
dc.date.available2024-12-20T14:31:32Z
dc.date.issued2024
dc.date.submitted
dc.description.abstractThis thesis investigates the feasibility of adjusting the electric load at the Rya wastewater treatment plant (WWTP), operated by the municipal company Gryaab AB in Gothenburg, Sweden, with the goal of reducing electricity usage momentarily and contributing to the local flexibility market, Effekthandel Väst (EHV). The Rya WWPP consumes approximately 240 GWh of electricity annually, of which most of the electricity is used for inlet pumping and aeration in the activated sludge process, accounting for 70% of the total consumption. As Gothenburg prepares for potential electricity shortages in the years ahead, this study focuses on momentarily reducing electricity usage during the peak hours (morning and evening) through short term and long-term flexibility measures. Flexibility refers to the ability to adjust electricity usage in response to market conditions or grid demands, either by reducing consumption or shifting it to different times. By analysing historical electricity usage data, the report evaluates different scenarios where Gryaab can participate in Effekthandel Väst by momentarily halting the operations or shifting the electricity demand to off-peak hours/periods. Results show that momentary shutdowns of key processes, can lead to significant reductions in electricity consumption. The study compares the financial and operational impacts of short-term versus long-term flexibility. While short-term flexibility offers immediate responses to market conditions and financial benefits, long-term flexibility provides consistent savings and aligns with strategic goals. The findings highlight the socio-economic and environmental benefits of Gryaab’s participation in Effekthandel Väst, including momentary reduced energy consumption and enhanced grid stability. The study concludes that optimised electricity management at the WWTP not only supports Gothenburg’s sustainability targets but also offers substantial cost-savings opportunities during high demand periods.
dc.identifier.coursecodeACEX30
dc.identifier.urihttp://hdl.handle.net/20.500.12380/309039
dc.language.isoeng
dc.setspec.uppsokTechnology
dc.subjectEffekthandel Väst
dc.subjectshort-term flexibility
dc.subjectlong-term flexibility
dc.subjectwastewater treatment
dc.titleFeasibility study on electric load adjustment for Rya Wastewater Treatment Plant
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeInfrastructure and environmental engineering (MPIEE), MSc
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