Johna Lou D. Anerdis, Joebell B. Moya, Dahlia L. Tumbokon ( February 1998)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
Anaerobic digestion of hog manure and market wastes was studied on a small scale using two different ratios of substrate to water. Results showed that the treatment with 1:1 ratio of substrate to water, using hog manure produced the greatest amount of biogas.
The study used ground market wastes and hog manure in fresh and dried state. Varying the proportions of substrates and water revealed various ranges of biogas produced. For instance, the 1:1 ratio of hog manure to water which has an average of 165g has produced more biogas than the 1:2 ratio of hog manure to water which has an average of 95.63g. On the other hand, the 1:1 and 1:2 ratio of market wastes showed significant difference (F0.05) compared to 1:1 and 1:2 ratio of hog manure. This was proven using one way ANOVA by getting the aggregate means of the results in each of six replicates. Comparative results in biogas production using hog manure and market wastes showed that the kind of substrate affects the amount of biogas produced.
The use of water is necessary to hasten the anaerobic digestion in the set-up.