Garbage Disposal and Vermicompost


LearnNext Lesson Video

Waste accumulated in our surroundings and is ready for disposal is called as garbage. Garbage is the solid waste which includes domestic wastes, municipal wastes and industrial wastes.
  • Domestic wastes are the wastes from our houses.
  • Municipal wastes are the wastes from schools, offices, roads and shops.
  • Industrial wastes are the wastes discarded from industries and small factories.

Garbage Disposal
A large, low-lying area used to dispose garbage is known as a dump.
  • A garbage dump is also used as landfill. Garbage collectors collect waste and then dispose it at garbage disposals.
  • Garbage dumps have flies, cockroaches and mosquitoes, and later turn into breeding grounds for micro-organisms which may cause diseases. This is the reason why garbage dumps are usually located on the outskirts of a city.
  • On a long run when garbage mixes with soil, it takes a longer time to decay making the soil loose.
  • Burning of agricultural wastes like dried leaves, husk etc. releases smoke and harmful gases into the atmosphere. These harmful gases may cause respiratory diseases.

Components of garbage
Domestic wastes can be of two types namely, dry wastes and moist wastes. Wastes are collected in two separate types of bins.

  • Blue bins are used to dump recyclable wastes which include glass pieces, glass bottles, plastic waste, old batteries, polythene bags etc.
  • Green bins are used to dump vegetable and fruit peels, food remains, tea leaves, egg shells, leaves, hair, tissue papers etc.

a) Dry wastes or non-biodegradable wastes: Dry wastes include newspapers, metallic waste, plastic pieces, broken glass pieces, wooden blocks, waste rags. These wastes are to be discarded into blue bins provided by the municipality. Dry wastes can be recycled and reused. At regular intervals of time they are taken to recycling plants for the process of recycling.

b) Moist wastes or biodegradable wastes: These are the wastes which come from our kitchen. They include food remains, vegetable peels, fruit peels, garden waste. These are discarded into green bin provided by municipality. These can be composted to obtain manure. Moist wastes are also used to fill the low lying areas by converting them into landfills.

Management of biodegradable wastes
Wastes can be decomposed and converted into organic manure by different processes.

a) Composting involves conversion of biodegradable wastes into organic manure by burying them in the compost pits. These wastes are decomposed by the action of bacteria and fungi. It is a slow and simple process. It is a cheap process. It causes no harm to the environment.

Advantages of compost
  • Compost increases the fertility of the soil.
  • It increases the amount of trace elements copper, manganese, molybdenum in the soil which are essential for growth.
  • Compost increases water holding capacity of the soil. It also improves the texture of the soil. 

b) Vermicomposting involves degradation of organic matter into fertile manure by using special type of earthworms called as red worms. The nutrient rich manure is called as vermicompost. The process of preparing manure with the help of red worms is called vermicomposting. The red worm is a type of earthworm that lives in the soil rich in organic matter. Organic soils are rich in nitrogen and carbon with plenty of moisture and microbes.

Method of Vermicomposting
  • A vermicomposting pit is made with a wooden box or big cement rings.
  • A mesh is spread at the bottom of the pit.
  • Vegetable waste, fruit waste, waste paper which is not shiny or coated with plastic, is spread over the mesh.
  • Water is sprinkled to create moisture so that the red worms can live.
  • A vermicomposting pit takes nearly two to four weeks to completely convert waste into manure.
  • The red worms possess a special structure called gizzards with which they grind food material. A red worm eats food equal to its weight every day. Their castings are used as rich manure. This is called as vermicompost.
  • Vermicompost should be removed from the pit and dried before use.
  • Vermicompost can be made in 3 -4 weeks.
  • Red worms do not survive in too hot or too cold conditions.

c) Landfill is another method of managing biodegradable wastes. Landfills are large areas used for waste disposal. Garbage thrown into landfills decomposes very slowly and makes the soil loose. As the landfill becomes full, the garbage decomposes and mixes with the soil. This land can be cleaned and converted into a park.

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Activities & Simulations

Activity 1 has compiled a game to demonstrate the components of waste. Waste can be green waste and brown waste. We have to select a character for ourselves which holds th bin for us. We have to go to different rooms in the building to collect waste just by clicking on the mouse. We have to double click on the wastse till it gets collected into the bin. When the bin is full, it should be emptied into compost bin in the ground. Compost is made in the compost bin and the balance level is shown on the balancer.  
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Activity 2 has devised a game named as Dora's Mermaid Adventure. This game involves a girl in collecting different types of garbage in the beach, inside the ocean with a vaccum cleaner. She has a vaccum cleaner in her hand which has air rays. By holding airrays with mouse button click on it to change the direction of the rays. Then the vaccum cleaner grabs all the types of garbage. This is a game which creates awareness in children to keep the surroundings clean.
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1 . Do you think it is better to use compost instead of chemical fertilizer?and why?

Yes because if we use chemical fertiliser then the fruit will have traces of the chemical which can be harmful. But no such problem occurs w...

2 . what is 3R formula?

It is reuse reduce recycle these methods are very beneficial

3 . Why should we use manure instead of chemical fertiliser?

Manures are ecofriendly organic substances which can increase soil fertility, water retention capacity and absorption rate of t...

4 . Write a short note on biodegradable plastics?


Biodegradable plastics are the plastics which can be decomposed by the action of bacteria into water and carbon dioxide...

5 . machines used to burn hospital waste at high temperature

The machines are incineratos . The process is incineration unless I'm mistaken