摘要：The bacteria in activated sludge from fish-meat processing were found to be halophilic or halotolerant, similar to marine bacteria. By mixing sea water in the drainage, a firm activated sludge was formed after aeration but the supernatant liquid of this mixture after sedimentation had somewhat higher C.O.D. (chemical oxygen demand) value. A neutral or slightly alkaline pH before the treatment had a good result on the purification of meat drainage. When the pH of the drainage was adjusted to a slightly acidic 5.2 after air blowing, both the residual protein and C.O.D. of the supernatant decreased markedly. During the digestion of fish-meat homogenate, residual total protein and C.O.D. increased temporarily as a result of liquefaction of granular meat but decreased gradually with progress in purification.
