Additional Question with solution:
Que: Wastewater is fit for human consumption or not. give reason to support your.
Ans: No, because it is dirty and has many diseases causing organisms like cholera, typhoid, etc.
Que: Name two chemicals used to disinfect wastewater.
Ans: Chlorine and ozone.
Que: Special type to toilets has been designed in aeroplanes, name it.
Ans: Vacuum toilets.
Que: Name the toilets used in areas with limited water supply.
Ans: Vermi - processing toilets.
Que: Name the type of toilets which are most suitable for holding an outdoor music festival in a park.
Ans: Chemical toilets.
Que: Name two things that can be made from sludge extracted during treatment of sewage.
Ans: Biogas and manure.
Que: Name two inorganic impurities present in sewage.
Ans: Inorganic impurities present in sewage are nitrates and phosphates.
Que: Mention the use of dried sludge.
Ans: It is used manure, thus returning organic matter and nutrients to the soil.
Que: Mention the use of dried sludge.
Ans: It is used as manure, thus returning organic matter and nutrients to the soil.
Que: In which type of toilets, human excreta is treated by earthworm?
Ans: Vermi - processing toilets.
Que: Give some examples of onsite sewage disposal systems.
Ans: Chemical toilets, septic tanks, composting pits, etc.
