Project Hand shredder for composting

VIGYAN ASHRAM, PABAL

Diploma in Basic Rural Technology {DBRT}

Project Name:- Hand shredder for composting

Student Name :- Ganesh Vyas & Ashwat hegde

Section Name :- Engineering and workshop                                       technology 

Guidance Name:- Laxman jadhav & Abasaheb padalkar

We sated the project on 26\3\18 to 6\4\18

                                Index

1.	Aim
2.	Requirement
3.	Material
4.	Procedure
5.	Costing
6.	Observation
7.	Information
8.	Image

Aim:- To make a hand shredder for composting

Requirement:- welding machine, hand grinder, bench grinder, welding bench ,welding shield , welding gloves , grinding goggle , hammer.

Material:- nut and bolt, circular plywood , bucket and lid, 2 inch iron rod, handle , ftr 2mm, welding rod, grinding blade and cutting blade.

Procedure:- first we take a bucket with lip and do hole to bucket and lip from lower side we will put bolltand then we will hold do circular plywood and  put inside the bucket and then we will weld rod with handle Patra and cut in shape of long rectangular shapewe will have the blades then we will weld it on a rod opposite one by one 12 blades and then we will assemble it.

Costing:- 

Material	Quantity	Rate	Total
1)Nut and bolt	1	5	5
2)Circular plywood	1	50	50
3)Bucket and lid	1	100	100
4)2 inch iron rod	1	150	150
5)Handle	1	100	100
6)Ftr 2mm	1\1 foot	50	50
7)Welding rod	10	20	20
8)Grinding blade and cutting blade	2	35	35
Labour charge	25%	-	113.75
	Total Material Cost		568.75

Observation:- weld carefully the blades because it is sharp

Information:- Why is shredding needed? 

“Biomimicry” is a rather sophisticated word for a simple truth - we can 

learn a lot by observing nature. At Prudent Eco Systems, while working 

on aerobic composting, when it came to deciding on whether to shred or 

not, we made the conclusion that shredding indeed is an essential 

operation in the composting of waste. Animals (including human beings) 

always bite food (i.e. break it down by physically cutting it) before the 

food is taken in for “bio-chemical” processing or digestion. Likewise in 

composting, physically breaking of the waste into smaller particles helps 

to speed up the breakdown by the bacteria acting on it. This is especially 

true in those aerobic composting processes where no additional or 

special microbes are introduced, but the degradation happens only due to 

the microbes naturally occurring in wet waste and garden waste.

Image:-