Micropollutant removal - EU Project Neptune

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Life cycle impactassessment (LCIA)and interpretationGoal & scopedefinitionInventoryanalysisImpactassessmentInterpretationApplication:Decision supportingguideline for waste watertreatment technologiesNormalisation: “Is that much?”• Expression of the impact potentials relative to a reference situation (EDIP: personequivalence),e.g. NR: 8,700 kg CO 2 -eq/pers/year.– Example: If the treatment of 1 m 3 waste water (1 fu) results in a total emission of 0.5 kg CO 2-eq => Normalized impact potential:0.5/8,700 = 0.057 mPE/fuValuation: “Is it important?”• Ranking, grouping or assignment of weights to the different impact potentials (EDIP: politicalreduction targets), e.g. for global warming the targeted 10 years reduction 20% => WF=1/(1-0.2) = 1.3.– Example: Weighted impact potential: 1.3*0.057 = 0.074 mPET/fuInterpretation: “Which alternative is better and what determines it?”• Is ozonation worth it in an environmental sustainability context or should we avoid it• Identification of hot spots• Sensitivity analysis: Effect of including more micropollutants• Sensitivity analysis: Effect of using alternative valuation principles10
Modelling LCA on ozonation; Main plan(physical inventory)Ozonation (2.8gO3/m3WW, Hunziker)-hfl-March-2009GaBi 4 process plan:Reference quantitiesThe names of the basic processes are shown.InfrastructureOzonationp X5,5096E-009 pcs.Electromechanical equipment2,7548E-009 pcs.Buildings and constructions4,1322E-009 pcs.Pipes and valvesAncilliary0,02044 kgOxygenEnergy0,14 MJCH: electricity, at cogen 500kWe lean burn, allocation exergy11
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Micropollutant removal - EU Project Neptune

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