simple technologies passive sanitation systems dave crombie passive treatment systems dave crombie...
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Simple Technologies
Passive Sanitation Systems Dave Crombie
Passive Treatment Systems
Dave Crombie
Appropriate Technologies Conference3 & 4 September 2007
Simple Technologies
Passive Sanitation Systems Dave Crombie
Naturally Occurring Biological Systems
• Biological population
• Food source
• Oxygen
• Energy
Sanitation – Nature’s Way
Simple Technologies
Passive Sanitation Systems Dave Crombie
Nature’s Way
Simple Technologies
Passive Sanitation Systems Dave Crombie
• Rural densification / urbanisation
Need for Formalised Sanitation
Simple Technologies
Passive Sanitation Systems Dave Crombie
Man’s Modifications to Nature’s Way
Dry Systems
• Buckets to trenches / ponds
• Ventilated Pit Latrine
• Dry “Eco” Sanitation
Water Borne Systems
• Septic Tanks
• Oxidation Ponds
• Reedbeds
• Maturation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Dry SystemsBucket System
Simple Technologies
Passive Sanitation Systems Dave Crombie
Dry SystemsVIP
Simple Technologies
Passive Sanitation Systems Dave Crombie
Dry SystemsDry Sanitation Systems
Simple Technologies
Passive Sanitation Systems Dave Crombie
Dry Systems
Dry Sanitation Systems
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet / Dry Systems“Eco”
Sanitation Systems
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsSeptic Tanks
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsSeptic Tanks
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsSeptic Tanks
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsSeptic Tanks
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsSeptic Tanks
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
POND MIXING
1612840
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0 5 10 15 20 25
Temperature (deg C)
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Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsOxidation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet Systems
Reedbeds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsReedbeds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet Systems
Reedbeds / Wetlands
Simple Technologies
Passive Sanitation Systems Dave Crombie
Wet SystemsMaturation Ponds
Simple Technologies
Passive Sanitation Systems Dave Crombie
Passive ??? Sanitation Systems
• Biological systems will always develop on their own – food, oxygen, energy
• The effect on the environment increases with more intense human development, with
more sophisticated systems required
• Dry “Eco” sanitation is interesting because the systems are simple, reliable, but suffer
the perception of being different to conventional water born systems.
• Oxidation ponds, and wetland systems have limited application due to the large areas
required, and variable long term performance.
• Maturation ponds should not be discarded without very careful consideration.
Simple Technologies
Passive Sanitation Systems Dave Crombie
Passive ??? Sanitation Systems