MINI PROJECT Mechanical Engineering

BANSILAL RAMNATH AGRAWAL CHARITABLE TRUST’S

VISHWAKARMA INSTITUTE OF TECHNOLOGYPUNE-411 037

(AN AUTONOMOUS INSTITUTE AFFILIATED TO PUNE UNIVERSITY)

PROJECT ON: Organic waste Composter. Composting at home!

PRESENTATION BY: Pranjal Kenge U18 141263 Akshay Kute U25 141608 Aniruddha Lomate U27 141260 Keshav Kumar Jha U19 141569

INTRODUCTION Mankind’s Need Today, We are facing the problems regarding the waste control. On the household level, a lot amount of organic waste gets generated everyday. Why throw this stuff away when it could be used in yard and gardens?So, there is good way with us to handle the waste by converting it into compost!

ORG

ANIC W

ASTE COM

POSTER

Composting at Home!

MATERIALS TO BE USED:Component Specifications Cost QuantitiesCutting Blades Material :MS Dimension:

Bore 20mmRs.40 per blade

4

Heating element :Iron

Wattage :1000w - 1

Mica sheet Thickness:2mm Rs.60 per sheet

1

Container box Cylindrical in shape Rs 20 1

BioClean Compost

Odourless, fast composting period, high temperature sustained

Rs.200 per packet

1

Shaft Bore12.5mmLength 500mm

- 1

Bearings Bore 12mm Rs 30 per bearing

2

Container Blades

Micro-organic compost Components

Iron as heating element

CONSTRUCTION AND MECHANISM Basically, the model consists of three compartments as

follows: - Cutting and mixing section Blades mounted on shaft - Heating Evaporation outlet section Nichrome wire and Mica sheet Assembly - Composting section Using micro organisms.

CONSTRUCTION AND MECHANISM In the first compartment, i.e. cutting section, the

waste from inlet is to be cut and mixed with the help of blades mounted on shaft. . To one end of the shaft, a handle is fixed, such that the shaft rotates when the handle rotates.

In heating section, the heating element used is nichrome wire wound on mica sheet.

In compost section, the dry material from heating section gets mixed with “Bioclean compost” which has microorganisms helping to convert it into compost.

The container acts as housing for the assembly, provides mounting holes for shaft and inserting plates. The plates are used between each of two sections.

The shaft of material MS having diameter 20mm. It is threaded. At both end of shaft, it is turned to 15mm for bearing mounting. The shaft is having holes at both ends for the purpose of weight reduction. The shaft is threaded for the purpose of blade mounting in order to fix lock nuts.

The blades that are to be used are wood cutter wheel, with OD 100mm. And, ID is 20mm. These are used for cutting of waste to be decomposed.

The lock nuts are used for proper fixing of blades on shaft i.e. it prevents axial movement of blades when in action.

Net is used in between cutting and heating plate. The net allows crushed waste into next section.

The ‘C’ shaped wire frame placed on conducting thin plate is used to collect residue of heated waste, helps to transfer to composting section.

At the end base of container, a tray is placed with bioclean compost which helps for fast decomposition of waste. The bioclean compost itself is odourless process. The process takes 7-8 hours for compost formation. The micro-organisms in the bio clean compost have capability of sustaining at high temperatures up to 150o C.

ABOUT BIOCLEAN COMPOST BIO-CLEAN is.. a blend of bacteria and enzymes. The bacteria are natural, not genetically-engineered. Within an hour after pouring the bacteria into the

drain, the bacteria begin to eat their way into the waste that has accumulated on the sides and top of the drain pipe. This is their natural food.

The bacteria in BIO-CLEAN,  when mixed with water they come to life in about 30 minutes. In the meantime the enzymes are breaking down the waste. They are very fast. In fact, they work on contact. When the bacteria revive they are hungry. Each one eats its weight of waste every minute - and they never sleep! As a result of eating and growing they start to multiply through cell division. Their number will double every 30 minutes under favourable conditions.

Elements

Potential failure

Potential effects of failure

Severity

Potential causes

Occurrence

Detection

R P N

Recommend -ended action

Action taken

Severity

Occurrence

Detection

R P N

Shaft

Torsion failure of shaft

No power transmission to blades

8 Improper fixing of handle to shaft

6 6 288 FEA Proper material and proper design

8 3 5 120

Blades

Breaking of teeth

No proper cutting

8 Dashing of blades,Improper mounting of blades

4 5 120 Proper design

Proper mounting

8 3 3 72

Heating element

Burning of mica sheet

Damage to whole project

9 Improper winding of nichrome wire

5 6 270 Check rating of wire

Proper winding

9 3 3 81

Compost

Damage to organisms

No compost formed

8 Increase in temperature above rated

7 5 280 Maintain temperature

Separation from heating element

7 2 3 42

DFMEA:

Problems faced And Solutions High cost of motor and coupling for transferring power to shaft. Winding of nichrome wire around mica sheet. Compost that can sustain for 60 to 70 degree Mounting of blades on shaft Methods tried out: 1. Using grub screw. 2.Using Lock nuts. (Preferred) Choice of container: 1.Metallic container. 2.Plastic container.(Preferred) Choice of heating element: 1.Nichrome wire and Mica sheet combination. 2.Water heater. (Preferred)

Uniform Heating of waste: Since we are using water heater to provide heat there is chance of uniform heating .In order to overcome this problem we have preferred thin conducting plate having uniform thickness. Transfer of waste from heating compartment to compost section: 1.Tilting of conducting plates 2.Provide sliding mechanism to plates 3.Using ‘c’ plates (Preferred) Micro-organism sustainability at high temperature: Using Bioclean compost this problem is solved wherein micro-organisms sustain up to 150 C.

Activities

1st week of August- Deciding of topic for mini project

22nd august- finalising the topic organic waste composter

-schematic diagram

28th august –Engineering Drawing

12th September- Finalising container searching, heating element, mixing blades, motor specifications

3rd October - Selection of material like blades, nichrome wire ,mica sheet.

13th October – Selection of micro-organism compost.

Future Scope:

Automation in the assembly. In today’s world,everything is automated in order to make the things easy. In our assembly,there is a lot of scope for automation such as 1.Timers used for action time of motors to rotate shaft. 2.Tranfer of waste from one section to another section using automated moving plates. 3.Buzzer system after completion of process after specific interval of time. Solar energy as source of heating section To heat the heating elements,solar energy can be used at inputs with the help of solar panels.

THANK YOU