ISO/TC 282/SC 2 N 20. N20 Evaluation Parameters and Methods for Reclaimed Water Safety Annex. Document type: NP ballot. Date of document:

Transcription

1 ISO/TC 282/SC 2 N 20 ISO/TC 282/SC 2 Water re-use in urban areas of secretary: huangyh9@126.com Secretariat: SAC (China) N20 Evaluation Parameters and Methods for Reclaimed Water Safety Annex Document type: NP ballot Date of document: Expected action: VOTE Action due date: Background: Committee URL:

2 Water reuse in urban areas Guidelines for reclaimed water safety evaluation: Evaluation indicators and methods for reclaimed water safety Qian-Yuan Wu, Ph.D; Dong-Bin Wei, Ph.D Tsinghua University; RCEES, Chinese Academy of Sciences, China

3 Background 2

4 Hazards of water reuse in urban areas Potential hazards of reclaimed water use Pollutants in reclaimed water Pathogenic microorganisms/ microorganisms Dissolved organic matters (DOM) Trace toxic and hazardous pollutants Disinfection byproducts (DBPs) Persistent organic pollutants (POPs) Endocrine disrupting compounds (EDCs) Nutrients e.g., N & P Eutrophication Production safety Health hazards Ecological hazards Ecosystem deterioration 3

5 Hazards of Water Reuse in Urban Areas Hazards during landscaping and recreational uses Algae bloom Color and odor problem Hazards /toxicities for human and aquatic lives Pollutants accumulation in sediment, etc. Reclaimed water for landscaping and recreational uses in urban areas Reclaimed water Human Algae Zooplankton Pollutants River Pond Fish 4

6 Indicators required for reclaimed water safety For different types of reclaimed water application, exposure pathways and potential hazards are quite different. The diversity of hazards will result in significant differences of water safety indicators for reclaimed water applications. Not only COD but also hazardous pollutants should be considered as the indicators for reclaimed water safety. 5

7 Guidelines for reclaimed water safety evaluation: Evaluation indicators and methods for reclaimed water safety 6

8 Purposes and concepts of guideline Potential users: Wastewater reclamation plant Reclaimed water providers Reclaimed water authorities and agencies Purposes: Determine and manage the safety of reclaimed water for different use approaches. Provide valuable information for the community. 7

9 Concepts: Purposes and concepts of guideline Indicators for reclaimed water safety management should be derived from exposure pathways and potential hazards analysis. Indicators should be selected for different protective targets and objects: Human health Ecosystem safety Environmental medium safety Facilities protection, etc. 8

10 Draft outline 1. Introduction 2. Scope of the guideline 3. Normative references 4. Terms, definitions and abbreviated terms 5. Framework for reclaimed water safety evaluation 6. Water safety indicators selection for typical reuse applications 7. Monitoring requirements 8. Reclaimed water safety estimation 9. Others 10. References 9

11 Draft outline 5. Framework for reclaimed water safety evaluation Reclaimed water uses Exposure pathways analysis Potential hazards identification Safety indicators selection Indicators monitoring Reclaimed water safety estimation 10

12 Draft outline 6. Water safety indicators selection for typical reuse applications 6.1 Principle for water quality indicators selection: selecting indicators for different protective targets and objects (Human health, ecosystem safety, environmental medium, facilities, etc.) 6.2 Indicators selection for ponds, waterfalls, fountains, rivers, etc. augmentation (Landscaping uses, recreational uses) Potential hazards analysis Indicators selections 11

13 Draft outline 6. Water quality indicators selection for typical reuse applications 6. 3 Indicators selection for irrigation in urban areas (Irrigation of parks, gardens, and landscape) (joint with SC1) Seasons specific, relating 6. 4 Indicators selection for dust control (Road cleaning and spray, concrete production and dust control for construction projects) 6. 5 Indicators selection for toilet flushing 6.6 Indicators selection for cooling systems (air conditioning) and boiler 6.7 Others(Fire extinguishing, car washing, potential new applications) 7. Monitoring requirements 7.1 Monitoring sites and facilities 7.2 Monitoring methods 12

14 Thanks very much! ( 13