Dewats Modules Final

12,922 views

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
12,922
On SlideShare
0
From Embeds
0
Number of Embeds
10,889
Actions
Shares
0
Downloads
159
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Dewats Modules Final

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

×