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Dewats Modules Final
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Dewats Modules Final

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  • 1. Technical overview of
      • DEWATS Modules
  • 2. Technical overview Septic tank / Settler Anaerobic Baffled Reactor Biogas settler Anaerobic Filter Planted Gravel Filter Pond Systems OR
  • 3. Technical overview
    • Septic tank / settler
    • Consists of min. 2 to 3 compartments
    • Settling / sedimentation tanks for retaining particle
    • Outlet is free from settleable solids
    • Dissolved & suspended matter passes untreated to next treatment stage
    • Efficiency 25% to 40%
    • Desludging period 1 to 3 yrs - depends on sludge storage
  • 4. Technical overview
    • Biogas settler
    • Sedimentation tanks for retaining particles
    • Biogas is formed due to digestion of settled organic matter in anaerobic condition
    • Outlet is free from settleable solids
    • Dissolved & suspended matter passes untreated to next treatment stage
    • Efficiency 25% to 40%
    • Desludging period 1 to 3 yrs, depending on sludge storage
    • Biogas production: Gas storage is needed (gas tight)
  • 5. Technical overview
    • Anaerobic baffle reactor
    • Treatment in absence of oxygen (anaerobic)
    • Wastewater passes through a series of chambers in up-flow form
    • Sludge (activated) at the bottom of each chamber
    • Further treatment (degradation) of suspended & dissolved solids by available bacteria
    • Efficiency 75% to 85%
    • Desludging needed only if excess sludge (activated) is generated
  • 6. Technical overview
    • Anaerobic fixed bed filter
    • Treatment occurs in absence of oxygen (anaerobic)
    • Wastewater passes in a series of chambers through the filter material in up-flow form
    • Filter is made out of gravel, slag or plastic elements
    • To avoid plugging pre-treatment (sedimentation) is necessary
    • Efficiency 75% to 90%
    • Desludging is needed only if excess sludge (activated) is generated
  • 7. Technical overview
    • Planted gravel filter
    • Treatment occurs in presence of oxygen (aerobic)
    • Treatment concentrates more on removal of smell & color
    • Planted gravel filter consist of plants (reeds) & filter materials (graded gravels, river pebbles)
    • Filter is permanently soaked (up to 50 cm from bottom) in water
    • Flow direction is horizontal
    • Suitable for pre-treated wastewater
  • 8. Technical overview
    • Flow principle of horizontal filter
    Inlet Slope protection with gravel Outlet Pre- treatment
  • 9. Please contact us for more details www.cddindia.org

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