Sustainability assessment using multicriteria analysis for wastewater handling
Ladda ner
Publicerad
Författare
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This study presents a sustainability assessment of three wastewater treatment technologies—
Activated Sludge (AS), Membrane Bioreactor (MBR), and Aerobic Granular Sludge (AGS)—
using the case of the Västra Stranden Wastewater Treatment Plant (WWTP) in Halmstad, Sweden.
A Multi-Criteria Decision Analysis (MCDA) approach was applied to evaluate and compare the
technologies across environmental, economic, technical, and social dimensions. Two different
weighting methods were tested: a traditional percentage-based model and a value-based model
using Weighted Score Ratios (WSR). Data collection included quantifiable performance indicators,
expert judgment from professionals at Laholmsbuktens VA (LBVA), and input from students in
an advanced wastewater engineering course.
The value-based model assigns monetary values to each sustainability criterion, helping to clarify
trade-offs and improve transparency in the decision-making process. Results from both workshops
showed that the value-based approach was more effective in identifying which criteria had the
greatest influence on overall sustainability.
This study highlights the strengths of combining technical data with structured stakeholder input
and suggests that value-based MCDA models can support more robust and balanced decisions in
wastewater planning.
Beskrivning
Ämne/nyckelord
Sustainability assessment, weighted score ratio, wastewater treatment, MCDA, activated sludge, membrane bioreactor, aerobic granular sludge, stakeholder evaluation