A Comparative Study on the Differences of Utilizing Paper and Food Wastes in Producing Biogas

S. Bautista, I. del Rosario, T. Favis, K. Gonzales, D. Pagdanganan

Quantitative Research, 2020


  Abstract

This research entitled, “A Comparative Study on the Differences of Utilizing Paper and Food Wastes in Producing Biogas” had the goal of comparing the biogas produced using food and paper wastes, thus aiming to answer the question “Which between paper and food wastes is the most effective type of organic waste in producing biogas?” To test this, the group devised a biodigester design to be used for households, where common organic wastes and materials were easily accessible. Two biodigester setups were made that each had an amount of 17.5 kilograms of either food or paper wastes and 2.6 kilograms of their anaerobic starter which is dog feces, having a total of 20.1 kilograms of wastes in each setup. The group observed daily refeeding in constant amounts of wastes for the first 20 days, and they increased the amounts in 3-day intervals for the last 9 consecutive days where the data collection for the water displacement method was performed. After this period, the group administered the flame test for each setup. The flame test showed that both setups observed the same flame colors, then also having the same biogas components. Furthermore, testing each setup by igniting the flame displayed that Setup A produced a bigger flame for longer durations, compared to Setup B. More specifically, Setup A was able to produce flames for a total of 77 seconds for two trials while Setup B only produced flames for 46 seconds that only lasted for a single trial. These sets of results showed that Setup A produced bigger and longer duration flames. Lastly, the water displacement method showed the amount of produced biogas in relation to the volume of water displaced within the setup. This set of data was used for performing the Independent type of T-Test. Based on this statistical test, the group concluded that the food and paper waste observed no significant differences in the amount of biogas produced.

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