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BS ISO 20468-2:2019 Guidelines for performance evaluation of treatment technologies for water reuse systems - Methodology to evaluate performance of treatment systems on the basis of greenhouse gas emissions >
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BS ISO 20468-2:2019 Guidelines for performance evaluation of treatment technologies for water reuse systems - Methodology to evaluate performance of treatment systems on the basis of greenhouse gas emissions, 2019
- National foreword
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, and abbreviated terms
- 3.2 Abbreviated terms
- 4 Symbols
- 5 Principles
- 5.1 General
- 5.2 Relevance
- 5.3 Completeness
- 5.4 Consistency
- 5.5 Accuracy
- 5.6 Transparency
- 6 Boundary conditions
- 6.1 General
- 6.2 Treatment system
- 6.3 Residue management system
- 6.4 Auxiliary system
- 7 Calculation
- 7.1 Calculation procedure
- 7.2 Step 1: Establish boundary conditions of evaluation
- 7.3 Step 2: Calculate annual amount of reclaimed water
- 7.4 General descriptions of methodological issues when calculating GHG emissions for Step 3 to Step 6
- 7.4.1 Choice of method to determine GHG emissions
- 7.4.2 Choice of activity data
- 7.4.3 Choice of emission factors
- 7.5 Step 3: Calculate GHG emissions resulting from energy consumption
- 7.5.1 Data acquisition
- 7.5.2 Calculate GHG emissions
- 7.6 Step 4: Calculate GHG emissions resulting from biological treatment processes
- 7.6.1 Data acquisition
- 7.6.2 Calculate GHG emissions
- 7.7 Step 5: Calculate GHG emissions resulting from consumables and generation of wastes
- 7.7.1 Data acquisition
- 7.7.2 Calculate GHG emissions
- 7.8 Step 6: Calculate GHG emissions reduced through the effective utilization of resources resulting from the production of reclaimed water
- 7.9 Step 7: Calculate total GHG emissions
- 7.10 Step 8: Calculate CO2eq emission intensity
- 8 Application of CO2eq emission intensity in evaluating the environmental performance of a treatment system
- Annex A (informative) Examples of emission factors
- Annex B (informative) Example of a worksheet for calculating total GHG emissions
- Annex C (informative) Example of CO2eq emission intensity calculation
- Bibliography [Go to Page]