Open AccessEnhancement of organic acids production from model kitchen waste via anaerobic digestion
Author(s) -
Saadiah Hafid Halimatun,
lsquo Aini Abdul Rahman Nor,
Abd Aziz Suraini,
Mohd Ali Hassan
Publication year - 2011
Publication title -
african journal of biotechnology
Language(s) - English
Resource type - Journals
ISSN - 1684-5315
DOI - 10.5897/ajb11.1360
Subject(s) - bioconversion , response surface methodology , fermentation , anaerobic digestion , chemistry , pulp and paper industry , biodegradable waste , organic acid , food science , green waste , wastewater , waste management , environmental science , chromatography , methane , organic chemistry , environmental engineering , compost , engineering
The aim of this study was to obtain the optimal conditions for organic acids production from anaerobic digestion of kitchen waste using response surface methodology (RSM). Fermentation was carried out using 250 ml shake flask which was incubated using an orbital shaker set at 200 rpm. Fermented kitchen wastes were used as inoculums sources. The individual and interactive effects of pH, temperature and inoculum size (%) on organic acids production from kitchen waste were investigated. The highest level of organic acid produced was 77 g/L at optimum pH, temperature, inoculum size of 6.02, 35.37°C and 20% inoculum, respectively. The results indicate that the most significant parameters affecting the bioconversion of kitchen waste to organic acids were temperature and inoculum size. Verification experiment of the estimated optimal conditions confirmed that RSM was useful for optimizing organic acids production from fermented kitchen waste.
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