Treatment of Lipid-Containing Wastewater Using Bacteria Which Assimilate Lipids

概要

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Bacteria which grew in a medium containing olive oil as a sole source of carbon were isolated from two meat plants in the Sendai district of Japan. All of the isolates tested assimilated beef tallow, lard, olive oil and used salad oil as a sole carbon source in shaking cultures. One of the isolates, strain 351,digested lipids most efficiently, as shown by the amount of n-bexane extracts that remained. This bacterium was identified as Bacillus sp. A new and efficient laboratory-scale apparatus for the biological treatment of lipid-containing wastewater was devised using strain 351. The apparatus consisted of a water circulation system for the primary treatment of the water, in which strain 351 was inoculated, and an ordinary aeration tank using activated sludge as a secondary treatment. Lipids in the wastewater could be almost completely removed by this apparatus without physical treatment. On the other hand, an ordinary aeration system in the laboratory using an air stone and air pump resulted in the floating of lipids, and was not successful in digesting lipids even in the presence of strain 351.
社団法人日本生物工学会の論文
1991-06-25