Efficient use of household waste is a sphere that has not been looked into in the past. But ways of extracting energy from household waste, mainly biological, have surfaced. But for this we need to separate the biodegradable wastes from non biodegradable wastes. Vermicomposting is a process in which biodegradable waste is dumped into the soil Vermicompost
Pit Size: May be any size but should be comfortable for earthworm breathing. So,6’ X 3’ with 2.5 depth should be preferred as minimum. Proportion of the material to be put in the following ratio:
Rotten Cow dung 60Rotten Jabra 40 (By Approx. Wt.)
Earthworm 30 pieces per Square foot i.e. in 18 sq.ft x 30 =540 pieces
Verities of Earthworm:
a) Eisenia Foetida
b) Eudrilus Evegeniae These two varieties have shoter life cycle and more multiplication Production:12 kg to 14 kg per Cubic foot and can produce 3 times in a year i.e. in 36 cubic foot, we can make about 432 kgs in one harvesting in one harvesting. In one year we can produce about 1296 kgs of vermi compost. Roof: the top of the pit should be covered with thatch proof roof to stop entry of heat and rain water. Otherwise thick polythene sheet on the bamboo frame can also be used.
Maintenance: Daily some water to be sprayed into the pit to maintain coolness. Harvesting: Note the material will need filling up every fortnight. Rotten green material is eaten up by the earthworm there will be a formation of black coloured earth like substance which has to be collected after duly sieved once. The fine material is vermicompost and ready for used. The whole process will take about 3 months. Our own little compost pit
As soon as we got to know that we will have to do a little experiment in order to complete our EVS project we started our own compost pit. First we collected all the required materials.
(3) Kitchen wastes