|Class 7 Biology Wastewater Story||Alternative sewage disposal system|
Alternative sewage disposal system
Low cost onsite sewage disposal has been practiced.
i) septic tanks used where there is no sewerage system for hospitals, isolated buildings.
Fig. Septic tank
ii) chemical toilets.
iii) composting pits.
Some toilets do not require scavenging because excreta from the toilet seats flow through covered drains into a biogas plant and biogas is used as a source of energy.