Abstract
A rapid composting system was designed by ENGR215 Team 6 to find a better use for the green waste generated at the Humboldt Coastal Nature Center. Below is a detailed page on the process and cost of building the rapid compost system.
Problem Statement
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Criteria
Criteria | Weight | Constraint |
Cost | 4 | Less than $400 |
Ease of Use | 7 | Usable by untrained volunteers |
Educational Value | 6 | At least volunteers learn more about rapid compost systems |
Effectiveness | 9 | Must be able to process about 6’x6’x6’ of yard waste every 14-21 days |
Labor Intensity | 5 | Cannot require more maintenance than 1-2 times a week for 2-3 hours each day |
Availability of Amendments | 2 | Bought locally and cheaply |
Aesthetics | 6 | More professional than a tarp |
Safety | 10 | Non-toxic and will not spontaneously combust |
Durability | 8 | Stable for at least one year |
Description of Final Project
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File: FOTD Compost Location.jpg
Compost System
Materials Cost
Materials | Unit Cost($) | Quantity | Subtotal($) | Tax($) | Total($) |
Our own materials | Cost | Number of units | C times Number of Units | taxes | time taxes |
Our own materials | 4.49 | 1 | 4.49 | 0.40 | 4.89 |
Our own material | 2.99 | 12 | 35.88 | 3.23 | 39.11 |
Total | $ Total |
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Design Cost
Figure 8: Time Invested
Test Results
Add some numbers and results of compost system.