CHAPTER-16 “GARBAGE, IN GARBAGE OUT”
WASTES (Based on source)
1. Domestic waste (produced by homes)
2. Industrial waste (produced by factories/ industries)
3. Agricultural waste (produced by farms)
4. Biomedical waste (produced by hospitals, pathology labs etc)
LANDFILL are natural slopes or man made troughs that are filled with garbage and covered with soil.
A landfill is usually converted into a park or a play ground.
COMPOSTING is the process of converting plant and animal waste into manure by decomposing.
VERMICOMPOSTING is the process of converting plant and animal waste into manure by decomposing with the help of redworms.
Method of vermicomposting:
1) Dig a pit about 30cm deep or take a wooden box.
2) Spread a net or 2cm sand at the bottom of the pit or box.
3) Spread some vegetable wastes like peels or green leaves, dried animal dung, newspaper pieces etc.
4) Powdered egg shells and sea shells can be mixed with the waste to help red worms.
5) Sprinkle some water to make this layer wet
6) Now put some red worms in the pit and cover them up with a gunny bag or an old sheet of cloth or grass.
7) After 3-4 weeks compost /manure is ready to be used for plants
Advantages of MANURE over CHEMICAL FERTILIZERS
a) Manure is a natural substance obtained by decomposing wastes in fields while fertilizers are prepared in factories.
b) Buying fertilizers costs money while manure doest not, as it is best out of waste.
c) A fertilizer does not provide any humus to the soil but Manure provides a lot of humus to the soil.
• Red worms are a type of earth worms used for composting
• They survive at moderate temperature with moisture around them.
• They eat food like vegetable peels or green leaves etc but they do not have teeth.
• They have a structure called gizzard which helps them in grinding their food
• They eat food equal to their own weight in a day.
• They double their.