Recovery of fats and proteins from food processing wastewaters w

Details Recovery of fats and proteins from food processing wastewaters w Recovery of fats and proteins from food processing wastewaters w

1988-12-23

1990-06-12

Hruskoci, Peter

Liquid purification or separation

Processes

Treatment by living organism

210725, 210727, 210730, 210905, 210926, 210631, C02F 312

Patent

active

049330870

ABSTRACT:
A process is disclosed for treating food wastewaters by acidifying to a low pH, adding an alginate, and, preferably, adding lime to a pH of at least 7.0, without adding iron or aluminum to assist in coagulation and flocculation of the wastewater. A floc is formed at acid pH in some wastewaters and at neutral to alkaline pH in other wastewaters treated with lime. After recovery of the floc as a sludge, the process provides at least about 70% removals of Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) at reasonable costs and with negligible formation of free fatty acids in the resulting sludge.

REFERENCES:
patent: 2204703 (1940-06-01), Sanders
patent: 3951795 (1976-04-01), Doncer et al.
patent: 4001114 (1977-01-01), Joseph et al.
patent: 4061568 (1977-12-01), Hall
patent: 4565635 (1986-01-01), Le Du et al.
van Gool, "Purification of Industrial Waste Waters", Jun./Jul. 1976, Nos. 391-392, pp. 277-278.
"Poultry Processing," Journal WPCF, vol. 53, No. 6, pp. 788-791.

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