WASH 2011 conference: Freya Mills, GHD Australia & ENPHO Nepal

1. Ongoing performance and best practices of Decentralised Wastewater Treatment Systems in Kathmandu, Nepal Freya Mills, GHD Australia & ENPHO Nepal

4. Locally available construction materials/skills

5. Decentralised responsibility

6. Low operation skills

7. Profitable by-products

10. No bar screens – they are always blocked

11. Increase ABR chambers and decrease wetland area

13. No tipping buckets for VFW unless skilled caretaker

14. Join pipes well and bury where possible

16. Few wetlands has leakage issues & broken or uneven pipes

17. Good construction quality and regular maintenance were key to good operation

20. Use existing management groups or maintenance departments

21. Ongoing funding required for operation and maintenance

23. Existing motivation from private bodies

26. Most systems operate well >5 yrs after construction with little expenditure

27. Maintenance is key to long term performance and low cost

28. Finance and management need to be set up prior to project