Developing an Agar-Based Biodegradable Water Container

Overview

Many people create biodegradable agar bottles and test agar films for biodegradibility; however, a new concept is testing an agar water bottle’s biodegradibility. This experiment tested the possibility by designing an agar water container and testing its biodegradibility. The base of the mold was an aluminum plate with a slight incline and a hole in the center. A cup was obtained and a hole was cut in the bottom of the base so that it could fit through the plate. Agar powder and water was heated on low. A cup was inserted through the aluminum and was sealed tightly. The agar liquid was poured into the cup and was left to cool. Any leftover agar was poured into a lid that fit the top of the container and was cooled for 35 minutes. The solidified agar was placed in saltwater for 7 days and was removed for 3 days to allow excess water to evaporate. Observations were recorded and the process was repeated three more times to create one prototype. By week 1, my weight decreased from 105 to 85 grams, then by the next interval, my container weight dropped to 65 grams, proving my hypothesis to be correct. The container gradually lost weight and changed in appearance showing clear signs of biodegradability. These findings are significant to the scientific community as my biodegradable water container is easier to reproduce and is more cost effective.

Competition history

• CSEF 2026 Environmental Engineering (Junior Division) · Entry J-11-44

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