This document outlines a case study on lagooning wastewater in Phuentsholing, Bhutan. It discusses lagoon systems as a cost-effective wastewater treatment option that can effectively remove pollutants while promoting hygiene. The objectives are to design a community-based lagoon system for low-cost sanitation and environmental protection. The methodology will include site selection, soil testing, wastewater characterization, population surveys, and design of lagoon ponds, sludge disposal, drainage, and an ecological pond. The expected outcomes are a lagoon treatment plant that generates no offensive smells and has minimal environmental impact.

1. LAGOONING OF WASTEWATERA Casestudy in PhuentsholingTsheringChodenWangmoGhalleyTshunduRabgayYoesel DorjiProject mentor : Director Dr. ChekiDorji

2. OUTLINEBACKGROUND

3. LITERATURE REVIEW

4. OBJECTIVES

5. METHODOLOGY

6. EXPECTED OUTCOMES

7. WORKPLANBACKGROUNDTypes of wastewater treatment technologies: Chemical treatment:Causes environmental pollution

8. Requires more energy and uneconomical2. Natural/Biological treatment:Terrestrial system

9. Wetland system

10. Aquatic system: Lagoon system Lagoon system:

11. Lagoon systems are cost effective to design, construct, operate and maintain.

12. Effectively remove pollutants and pathogens promoting hygiene in the area.LITERATURE REVIEWHobson, John,U.K., Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories ;CH₄ and N₂O emission from wastewater handling

13. Methods for monitoring and estimating methane emissions from sludge treatment.

14. Hotter climates: anaerobic processes are more likely to be employed.A Natural Wastewater Treatment Program, Carolina Bays(1993)Design of a soil filter treatment plant(wetland) with the innovative use of willows and poplars instead of reeds as vegetation and a composter for the direct composting of solids. William J. Oswald, Advance integrated wastewater pond systemProper design of treatment plant to eliminate sludge and lower the power-use incorporating methane fermentation and photosynthetic oxygenation. OBJECTIVESTo design a community based Lagoon system that can provide low cost sanitation and environmental protection.

15. To determine the quality of wastewater.

16. To determine the discharge of wastewater of CST.

17. To determine the bearing capacity of the designated site.METHODOLOGYSITE SELECTION BEARING CAPACITY OF SOIL

18. PERMEABILITY TESTCHARACTERIZATION OF WASTEWATER DETERMINATION OF SEWAGE DISCHARGE

19. POPULATION SURVEYDETERMINATION OF DESIGN LIMITSDESIGN OF TREATMENT PLANTLAGOON PONDS

20. SLUDGE DISPOSAL AREA

21. DRAINAGE SYSTEM

22. ECOLOGICAL PONDPLANT TREATMENT ESTIMATION

23. EXPECTED OUTCOMESDesign a lagoon treatment plant that generates no offensive smells, and have minimum effect on environment.

24. Application of theoretical knowledge.

25. Determine the characteristics of waste water in the CST campus.WORK PLAN

26. THANK YOU!!