Separation and recovery of organic acids from fermented kitchen waste by an integrated process.
Omar, Farah Nadia and Abdul Rahman, Nor'Aini and Hafid, Halimatun Saadiah and Phang, Lai Yee and Hassan, Mohd Hassan (2009) Separation and recovery of organic acids from fermented kitchen waste by an integrated process. African Journal of Biotechnology, 8 (21). pp. 5807-5813. ISSN 1684–5315
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Organic acids produced from anaerobic digestion of kitchen waste were recovered using a new integrated method which consisted of freezing and thawing, centrifugation, filtration and evaporation.The main organic acid produced was lactic acid (98%). After the freezing and thawing process, 73% of the total suspended solids were removed and the organic acids were elevated from 59.0 to 70 g/L. The evaporation technique was used to further concentrate the organic acids up to 224 g/L. Using the integrated recovery method, the reduction of the total suspended solids in the solution achieved was about 93%. The material balance for the recovery process was also presented.
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