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Drinking Water management for Soneva Gili

Drinking Water management for Soneva Gili. 28. August 2008. Drinking water management overview. 1.2 Rainwater tank 160m³ (local). 2. Salt/Rainwater RO. 1.1 Rainwater filter. 2. Salt water intake (1st tank). 250l/h. 1. Rainwater harvesting (local). 3. Fresh water tank 20m³ (local).

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Drinking Water management for Soneva Gili

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  1. Drinking Water management for Soneva Gili 28. August 2008

  2. Drinking water management overview 1.2 Rainwater tank 160m³ (local) 2. Salt/Rainwater RO 1.1 Rainwater filter 2. Salt water intake (1st tank) 250l/h 1. Rainwater harvesting (local) 3. Fresh water tank 20m³ (local) 25% reject 5. Sweet water RO / Mineralization 250l/h 250 l/h 4. Sweet water RO (local, 2 x 400l/d) 6. Fresh Water tank (2m³) (local) 6. Mineral Water tank (2m³) (local) 7. UV Sterilization (local) 8. Dispatch, bottle filling, etc local Assumption: 3m³ / day drinking water consumption (2m³ mineral water, 1m³ RO water)

  3. 1. Rain water harvesting • Roof space (37m x 15m) = 555m² is sufficient for theoretical annual rain water harvesting of ca. 1000m³/year • Even after 30% safety reduction 700m³/ year is theoretically sufficient to provide complete rain based drinking water production (2m³/day) • Realistically we assume drinking water production 70% based on rain water and 30% based on salt water

  4. 1.1. Rain filter • Description • Specialist rainwater filter for installation. The ready-to-install Hydrosystem 1000 is quickly and safely installed on site. Suitable for roof areas up to 1000m². The cleaned water has such an excellent water quality that it can be discharged directly into soakaways, surface waters, the wider environment or even as shower water. • The filter function is an up-flow process and this allows for a design with a minimal height difference between the inlet and outlet. In the filter shaft the rainwater is cleaned by basic operation of the following processes: - Sedimentation, - Adsorption, - Filtration, and Chemical Precipitation. • Incoming rainwater is led down to the basal section of the filter shaft. A hydrodynamic separator built in the base section promotes particulate sedimentation. The water is led into this separator tangentially and generates a radial flow pattern. Particles settle into the silt trap located below the separation chamber. Above the separation chamber are 4 filter elements, occupying the full shaft width such that all water must flow up through the filter. • The Siltation of this filter is slow due to the upwards flow, and the fact that the filter is below the water level. The filter is easily exchanged. Under normal conditions the filter will last for 2 years, maintenance free.

  5. 1.1. Rain filter How it works 1. The rainwater from the connected area is fed into the basal section of the filter housing. The angled inlet generates a radial flow pattern. 2. The hydrodynamic separator converts turbulent waters into a radial laminar flow pattern, generating particle sedimentation, particularly of the sand fraction. 3. This takes place over an inlet to the lower section of the filter shaft. The sediment is retained in a silt trap chamber below the separator. The silt trap needs to be emptied out at intervals. 4. In the central section of the filter housing is the actual filter, Filter Element Roof. The filter element filters out the fine materials in an up-flow process and dissolved materials are precipitated and adsorbed. The filter is backwashed from above. When exhausted the filter is easily exchanged. 5. The filter element is easily pulled up through the shaft opening. 6. Above the filter element is the clean water. It passes via an oil separator and then flows via the outlet into soakaways and so on.

  6. 1.1. Rain filter Product Components 1. Rainwater Inlet (DN 150/ DN 200). 2. Angled Inlet. 3. Separator Chamber. 4. Silt Trap to retain sediment. 5. Filter Elements (4 No.). 6. Removal Device for Filter Element. 7. Overflow Pipe and Cleaning Shaft. 8. Oil Separator. 9. Outlet to storage or to waste.

  7. 1.2. Rain water tank Combining all available roof space 4m Filter 4m 160m³ 2m 10m

  8. 1. Costs rain water harvesting € 3,980 Filter € 100 (2 calmed inlets) € xxx (local tank 160m³ volume) € xxx (pipes, fittings etc) € xxx (other…) Total: € 9,000 (estimate)

  9. 2. Rain-/Salt water purification Pump PS 600 (48VDC, 300W) Badu Top 12 10000l/h oralternative low energy AC pump Levelswitch Reject Salt Water 80% ExistingSalt water tank Levelswitch Product water tank (fresh water tank) 20m³ TSW 3600 C 250l/h 160m³ Rain water tank Valves 24 VDC Reject Sweet Water 80%

  10. 2. Salt / Sweet water RO

  11. 2. Costs RO • € 30,900 TSW 3600 C (using existing AC power, adapted for dual water intake, dual reject) • € 12,000 (Solar powered PV version with 1,7kWp PV panels, charge controller, battery… not recommended) • € 3,000 (local material like pipes, wires, tanks etc) € 34,000 Total costs

  12. 3. Fresh water tank 20m³ • Input from Boniface • Location • Costs!!! • Piping into • Pre cleaning tank

  13. 4. Sweet water RO • Existing system based on Soneva Fushi • Correct and consistent dosing? • Details from Boniface required • Est. quantity 2 x 400 l/d (hosts fill up?) • Operation/ maintenance locally

  14. 5. Mineral water components *Possible segments: Energy boosting, Heart health, Weight loss, Detox, Stress reduction, Specific disease related, Other (Good mood, “Good for guts”, Good night, Older age, etc)

  15. 5. Fortified Water addressing: Aging • Popular Ingredients • L-carnitine • Zinc • Vitamin B12 • Coenzyme Q10 • Antioxidants (Vitamins A, C, E) • Calcium • Fiber • Iron

  16. 5. Fortified Water addressing: Energy • Popular Ingredients • Iron • Magnesium • Vitamin’s B3, B2, B1, B6, B12 • Branched-Chain Amino Acids (BCAAs) • Glutamine • Folic Acid • Antioxidants (Vitamins A, C, E) • Alpha-lipoic Acid • Coenzyme Q10 • L-carnitine • Taurine

  17. 5. Soneva water components options *Possible segments: Energy boosting, Heart health, Weight loss, Detox, Stress reduction, Specific disease related, Other (Good mood, “Good for guts”, Good night, Older age, etc) Cost estimate per liter: € 0,02 to € 0,05 for concentrate (powder or liquid form)

  18. 5. Reverse Osmosis based Mineral water production • Raw water is already highly purified RO water • Polishing though an additional RO step • 250 l/h production • 8 hour operation = 2m³/day production • 12 hour operation = 3m³/day production • 230 V 50Hz power supply (500W) • Dosing System for mineral liquid, measurements and controls • UV sterilization after water storage (locally) • Piping, fittings, accessories (locally) • Research into different concentrates/Coordination with Six Senses (extra project) • Construction / Test / Readjustment

  19. 5. Mineralisation components • Sample line holder for 2 electrodes • Dosing tank (100l) • Mixer for concentrate • Pulsed Water meter • Control and regulation system of concentrate • Control of mineral water tank • Dosing pump

  20. 5. Costs Mineral Water production • € 24,700 complete hardware • € 4,900 installation / Set up • € 3,000 (local material like pipes, wires, etc) • € 7,400 (buffer for tanks, bottling, unknowns) • Ongoing costs for concentrate to be confirmed Total costs • € 30,000 best case scenario • € 40,000 realistic scenario

  21. 6. Mineral water tank • Input Boniface • Exact size, material • Location • Details of bottle filling operation • Offer to hosts as well? • Bottle cleaning details • Pump supply for pressure • Sparkling / Non sparkling output details

  22. 7. UV Sterilization • Input Boniface • Exact size, material • Location • Costs!!!

  23. Total costs • € 9,000 Rain water harvesting • € 34,000 Rain water / Salt water RO (Non PV) • € 40,000 Mineral water production € 83,000 Total

  24. ROI Drinking water Assumptions: Daily production 2m³, invest only • Total invest: € 83,000 • Liter Costs after • 100 days € 0,41; • 200 days € 0,21; • 365 days € 0,11; • 2 years € 0,06

  25. ROI Drinking water Assumptions: Daily production 3m³, invest only • Total invest: € 83,000 • Liter Costs after • 100 days € 0,28; • 200 days € 0,14; • 365 days € 0,08; • 2 years € 0,04

  26. ROI Drinking water Assumptions: Daily production 4m³ (technical maximum capacity), invest only • Total invest: € 83,000 • Liter Costs after • 100 days € 0,21; • 200 days € 0,10; • 365 days € 0,06; • 2 years € 0,03

  27. Other savings • Reduction of imported mineral water (loss of revenue?) • Factor 9 (salt water) -11 (rain water) power, CO2 and energy cost reduction of on site produced mineral water compared to salt water purification current RO unit diesel powered • Soneva Water sales revenues – business model?

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