Date

3-2010

Degree

Bachelor of Science in Agricultural Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Ronaldo B. Saludes

Committee Member

Moises A. Dorado, Marion Lux Y. Castro

Abstract

Biogas production of food waste at different feedstock concentrations was determined using laboratory-scale batch anaerobic digesters. A total of eight (8) treatments were used in the study. The treatments were divided into two groups, one is mixed once a day for one minute and the other is unmixed. Each group has four different feedstock concentrations of 1:0.5, 1:1, 1:2, and 1:3 (ratio of fresh weight of feedstock to weight of water). Biogas production, salinity and pH were evaluated to compare the treatments. Biogas volume was measured using water displacement method. Salinity and pH were measured using EC and PH meter, respectively. Food wastes were allowed to digest anaerobically for 30 days. Result showed that feedstock concentration of 1:1 (mixed) produced the highest biogas yield. Unmixed treatments produced negligible volume of biogas. Mixing of feedstock during digestion prevents clumping of starches which slows down hydrolysis as well as the whole digestion process. Results proved that mixing is essential for anaerobic digestion of food waste. Parameters measured such as salinity and total of feedstock at the end of the experiment showed that the digested food waste is not yet fit to be disposed and thus require further treatment.

Language

English

LC Subject

Food waste, Feedstock, Biomass chemicals, Sewage--Purofication--Aerobic treatment

Call Number

LG 993.5 2010 A2 P38

Document Type

Thesis

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