P20422: Black Soldier Fly Composter Improvements
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Preliminary Detailed Design

Table of Contents

Team Vision for Preliminary Detailed Design Phase

For this phase we planned to execute a few test experiments for our subsystems. One test will be done to see how light effects the larvae when it comes to migration patterns. By completing this experiment we will know if using the LED lights will be a viable option to prevent the larvae from migrating down too far. A prototype will be built to test the feasibility of the revolving door method to remove the waste from the composter. We plan on buying all the materials to do the test experiments. As a group we are formulating a list of materials we plan to use for the composter construction. All of these materials will be put into a BOM along with a detailed budget.

Throughout the time of this phase we have gone through our risks and assessed if they are still applicable and added new ones as they became relevant. We have began the process of creating a 3D model of the final design we plan on building. The materials for the tests have all been surplus materials we have gathered except for the LED lights. Materials used have been documented along with and money spent thus far. Test plans have been updated as more research and prototyping has been completed. research is still being done to find the most cost effective materials to build the final structure with. A plan for the next phase has been established to keep the group on track.

Identified System Redesign Issues

Structure/Shape

Removal System

Ramps/Migration System

Ergonomic Adjustability

Engineering Analysis

Each subsystem redesign was evaluated against the continuously updated engineering requirements.

Ramps

public/Photo Gallery/ER Ramps.PNG

Lights

public/Photo Gallery/ER Lights.PNG

Removal System

Adjustable Height

The excel file for the engineering analysis can be found using the following link: Engineering Requirements (By Subsystem).

Feasibility: Prototyping, Analysis, Simulation

Removal System Redesign

Prototype

Cutting the bucket to make the auger prototype

Cutting the bucket to make the auger prototype

Assembled auger subsystem

Assembled auger subsystem

Top view of nested buckets

Top view of nested buckets

Finished auger

Finished auger

Conclusions

Pouring the soil into the auger prototype to test its effectiveness

Pouring the soil into the auger prototype to test its effectiveness

Ensuring no soil leaked through the auger after being poured in

Ensuring no soil leaked through the auger after being poured in

Computer Aided Model

Cost Implications

Migration System (LED Lights) Redesign

Prototype

Test setup

Test setup

Larvae placed in middle section before tests are performed

Larvae placed in middle section before tests are performed

Conclusions

Larvae hiding from the light in the corner of the bin

Larvae hiding from the light in the corner of the bin

Cost Implications

Ramps Redesign

Prototype

Computer Aided Model

Conclusions

Ramp covered by 2x4 so larvae are in the dark

Ramp covered by 2x4 so larvae are in the dark

Cost Implications

Adjustable Height Redesign

Prototype

Conclusions

Cost Implications

Drawings, Schematics, Flow Charts, Simulations

Computer Aided Model

Sub-System Implementation

Bill of Material (BOM)

Purpose

Confirm that all expenses and contingencies are afforded by the project financial allocation

Input and Source

  1. PRP
  2. Design Files

Conclusions

Output and Destination

Link to the BOM can be found here.
BOM as it is at the end of this phase

BOM as it is at the end of this phase

Test Plans

public/Photo Gallery/testplans.png
Above is a chart that outlines the various test plans to perform and their associated engineering requirements.

An excel file of the test plans can be fond using the following link: Test Plans.

Risk Assessment

The following risks were identified in the Preliminary Detailed Design phase:
public/Photo Gallery/risktable3.png
An updated Risk Table with all identified risks can be found using the following link: Updated Risk Table.

Design Review Materials

The agenda for the preliminary detailed design review presentation can be downloaded using the following link: Agenda.

The preliminary detailed design review presentation can be downloaded using the following link: Presentation.

Plans for next phase

For the next phase we plan on meeting with someone from the machine shop for a technical consultation. The consultation will be for suggestions on the best methods for cutting and or securing different parts of the structure together. We also plan on meeting with a subject matter expect to talk about the biology of the flies to get a better understanding of them. Risks will be reevaluated to see what risks have been added as well as what is no longer relevant. The BOM will continually be updated as more materials are purchased. Our 3D model will be finalized through the software program and a basic layout will be made for the shed to help visualize where everything will go. A plan will be established for MSD 2 for how we will begin construction along with how the rest of the materials will be gathered.

Individual 3-week plans

Each team member provided their vision for the next phase and how they plan to achieve it:

Nicholas Balcomb

Tara Marshall

Elizabeth Maeder

Samantha Porten

Grant Pearce


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