2. What is a biogas ?
Biogas refers to a mixture of different gases predominantly
methane and CO2 produced by the natural decomposition of
organic matter in the absence of oxygen. The raw materials
used are waste from agriculture, municipality, plant material,
sewage, Kitchen etc.
4. Biogas - Uses
Effective disposal of organic waste. The digester model varies according to the
waste type
Nutrient rich sludge
Alternative to fossil fuels
The resulting gas can be used as gas, electricity, transportation fuels
Case 1 – Sweden uses bio gas to run significant transportation
Case 2 – Rural households of Punjab uses bio gas as an alternative to LPG
5. Case 2 – Rural households in Punjab
The village’s centralised community-owned
biogas plant — which can process up to 2,500
kg of cow dung daily —not only provides a
piped supply of biogas, it also collects dung
from the doorsteps of its residents.
8. What is a septic tank and soak pit?
In septic tank effluent from WC is collected. The effluent here
gets treated biologically and the treated water will then be
connected to the soak pit.
The waste water from the bathroom, kitchen etc. is directly
connected to the soak pit.
9.
10. Retention period in Septic tank ?
Septic tank retention time is the length of time that effluent remains in the
septic tank before moving out to the absorption system or leach field.
In order for a septic tank to function properly, adequate liquid volume
must be maintained to allow for sufficient "settling time" or "retention time"
which permits solids to either settle out as sludge or join the floating-scum
layer at the top of the tank.
11.
12. Considerations – Soak pit construction
Significantly away from foundations and water sources
Shouldn’t disturb/contaminate the water table
Periodic evacuation in water logged areas
