P18422: Black Soldier Fly Composting Habitat Improvement

Customer Handoff & Final Project Documentation

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

During the Customer Handoff Phase, the group planned to deliver the following items:

What We Accomplished:

Electrical Subsystem

Shed Wiring

The drawing shows the wiring of power being fed to the shed when. This drawing is made under the assumption that a constant feed of 110v Ac is being supplied and the system is being fed from both the infeed and solar panels. Special color coating is used distinguish between the multiple feeds.
Shed Wiring Schematic

Shed Wiring Schematic

Shed Equipment Layout

Shed Equipment Layout

Raspberry Pi Code

The Raspberry Pi code was updated so that the data collection loop would continuously run, once started, until the Pi is turned off. The final time between data collection cycles was set to 5 minutes with the desired climate limits updated from the customer requirements. To update these limits or the collection time, or to learn how to remove the collection file, please review the Electrical User Manual

As stated in the Problem Tracker Section below, a new CO2 sensor was purchased. Upon setup of the sensor, the code was written using the Python Code language. A conversion was attempted as it is possible to run this code in the existing project,which was written in the C code language, however the python language made it difficult to translate and implement in the rest of the code. To solve this, either the rest of the project must be re-written in Python or the new sensor code must be translated to C code.


Final CAD Package During this phase we finalized the CAD and have included the complete CAD package so that future project groups are able to recreate our design.
Final CAD Design

Final CAD Design

Larvae Collection Bins

In this phase we had to redesign our larvae collection bins due to them being to small. Instead of a collection bin, we will be adding a bracket to the side of the composter and a plastic bag will be attached and hold the larvae to be collected.


Manufacturing Timeline

Manufacturing Timeline

Above is the manufacturing timeline. This picture shows that all parts were completed being manufactured during this phase. While this occurred about a month behind schedule, our team worked together and got the composter manufactured.
Manufactured Part 1

Manufactured Part 1

Manufactured Part 2

Manufactured Part 2

Special Thanks To: The Construct, FIRST Team 340, James Buduson, Taylor Nobles and Zach Cooper for their time and equipment.


Final Assembly

Final Assembly

During this phase we started and completed the assembly of the composter. This included solving several problems we had not previously considered including:

Use the Assembly Manual in order to learn how to assemble this composter from its base pieces.

We also have created a Composter User Manual in order to help operators understand how to operate this system in their day to day research. The test plan section will include a video of bottom layer operation.

In this document we discuss a few changes we would recommend for future projects:

Test Plans

Test Plan Tracker

Test Plan Tracker

There were several tests that we were able to successfully complete during this project including:

There were a couple tests that we were not able to successfully meet the requirements:

There were many tests we were not able to complete at all due to unexpected restrictions of the project including no power being available to the shed, trouble getting the CO2 sensor programmed, and the composter being so behind in assembly. Some of these key tests that should be checked by the researchers before beginning regular operations are:

For more information on the tests that were conducted and the results we found, see the Test Plan Document.

We were able to do a test with leaf compost in order to check the operation of the bottom layer system:

Test Results Document.

Bottom Layer Removal Operation Video

Above is a video of the bottom layer test that was conducted towards the end of the semester. Leaf compost was used in the system in order to try and demonstrate how to operate the bottom layer removal. The video shows it took 2 minutes to remove the bottom layer. There was some issues with the compost falling through the slits in the bottom layer but we are unsure if this affect will translate to the actual food waste inputted into the system.

Problem Tracking

The group's problem tracking document has been updated to include the newest happenings related to obstacles in the project's progression. Most notably, problems arose in the manufacture of the composer as well as in the development of code for the CO2 sensor. Despite reasonable efforts to address these problems, the issues presented by these situations have compromised the quality and delivery of the final composting system. New considerations can be seen and expanded upon in the Problem Tracking document.

Risk Management

The team reviewed and updated the cumulative risk assessment that was first created in the Problem Definition phase of the project (and has been updated during every project phase thus far). Changes have been witnessed on several fronts but will not be updated until the full impact of these risk changes can be understood by the team administration. The majority of the remaining risks in the below table are associated with the continued operation of the composting system in the future:
Risk Matrix

Risk Matrix

Below is a summary of the mitigated risks that have been concluded through their respective efforts (included as a separate column):

Risks Mitigated

Risks Mitigated


The Budget Maintenance Document shows the final amount spent on all of the materials along with the breakdown of what budget was used for each item. Blue signifies ISE Budget, White signifies MSD budget, and Green signifies no money spent.

The total amount spent for the entire project was $1,903.33 which is over budget. The total amount spent on materials to build the composter was $989.09 which is also over customer requirements but this is due to vendor restrictions.

The Purchase Plan Document shows that all items have been purchased however we are still waiting for the delivery of the Plug, Enclosure, and Arnold Battery Cables.

Link to our Budget Maintenance document.

The Areas to Cut Cost Document shows the materials and costs that the team has identified that can be changed in future iterations to reduce the cost of the project.

Project Summary

Lightning Talk Slide

Final Team Poster

Final Individual Visions

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