Download - Biofilm Harvester
Biofilm HarvesterALGAE HARVESTER
SRO TECHNOLOGIESTeam:Jennifer Van GalderBradley DeanRohit AbrolConnor DoyleLucas PissolatiDanilo Versiani
Industrial Partner:Vincent WongAdvisorsNick WongAlex YangFaculty Supervisor:Sandra BrancatelliJim Catton
April 8th 2015
Introduction
Problem - The algae growth from last years filtration system begins to die off if it is not harvested about once every two weeks.
Objective
Solution - Design and build a scalable and independent algae harvester designed on the basis of cost effectiveness, efficiency, and functionality.
Note: The components of the harvesting system have been left out of this presentation due to an NDA
➢ Issues○ Group○ Tools
➢ Modifications○ None from our final design
➢ Final Design○ Succesfull
Introduction
Summary of Results
OutlineIntroduction
Project
Problem
Current method of harvesting:➢ Manual removal of algae
Project
Solution:➢ Fully automated robot
CriteriaProject
Cost-effective
Safe
Effective
Maintainable
Independent
Project ManagementProject
Task Date Organization
1. Research September-01-2014 ❏ group meeting❏ problem discussion
2. Prototype Ideas October-13-14 ❏ Brainstorm❏ Separate into groups:
-mechanical, electrical
3. Final Design Selection November-01-14 ❏ Final prototype selection
❏ Further research
Design Evolution
Primary Design
Advantages & Disadvantages
Secondary Design
Final Prototype
ProjectProject
Preliminary DesignMotor
Counter Weight
V-Groove
Rail
Geared Pulley Beaded
Chain
Support
Blade
Advantage Disadvantage
➔ Easy to manufacture
➔ Cost effective➔ Efficient➔ Can be
automated
➔ Dependent➔ Inconsistent
algae harvesting ➔ Difficult to repair ➔ Requires
modification to existing filtration unit
Project
Project
Secondary DesignAdvantage Disadvantage
➔ Independent➔ Fully automated➔ Easily
maintained, replaceable
➔ Marketable➔ High grip wheels ➔ versatile
➔ Longer method to harvest
➔ Accumulation of error
➔ Robot’s weight➔ Complex
manufacturing➔ Turning radius➔ Wheels may
disturb the algae
Plastic Shell Body
Scraper
Tank Style Wheels
Control System
Final Design
Wheel Assembly
Body Assembly Control System
Note: Certain components are excluded from this image due to a non-disclosure agreement
Advantage Disadvantage
➔ Independent ➔ Fully automated➔ Easily
maintained➔ Replaceable➔ Marketable➔ Multiple
applications ➔ Versatile
programming ➔ No turning
radius
➔ Longer harvesting time
➔ Difficult to manufacture
➔ Higher manufacturing cost
➔ Weight
Project
Results
Technical description
Results
Body AssemblyFrame
Shell
Roller Ball Assembly
Project
➔ Components
➔ Connections
➔ Function
Wheel Assembly
DC Motor
KitWheel Enclosure
Servo Block Kit
Project
➔ Components
➔ Connections
➔ Function
Controls AssemblyDC Servo
Battery
Arduino
Sensors
Ni-MH AA2200mAh 8.4V
Metal Gear Motor
Motor Shield
Project
➔ Components
➔ Connections
➔ Function
Testing
Calculations
Initial Testing Prototype
a. Mass of algae:m = V x pV = 28.32 Litersp = 120 gram/liter
Mass is 3398.4 grams(7.49 Pounds)
Testing
Calculationsb. Torque per motorT = 100 x [(a x gsin) x M x r] e
N e = 65%
a = 0.5m/s^2 g = 9.81m/s^2 M = 50pounds r = 0.0762meters N = 2
Torque is 158.56 oz * in (1.198 Nm)
c. Power per motor
w = v r
v = 0.5 m/sr = 0.0762m
Power is 6.562 rad/s
Calculationsd. Battery Ratings for each drive motor
c = I x t
I = 1.225 Ampst = 2 hours
Battery rating is 2.45 Amp * hour
Testing
Equipment
Method
Results
Testing
Initial Testing
Prototype Testing➢ Full assembly testing
-Movement-Turning
➢ Vacuum-similar algae
Testing
Conclusion
Future Recommendation
Analysis
Final Thoughts
AnalysisConclusion
Cost-effective
Safe
Effective
Maintainable
Independent
Future Recommendations➢ Test vacuum➢ Continue testing to improve efficiency➢ Continue Improving code➢ Do a Circuit on a PCB➢ Add sensor to fix the angle position
Conclusion
Final Thoughts➢ Complex research, testing, and hard work➢ Final prototype:
-Constructed to completion-Tested
Conclusion