Renovation of used water from poultry processing plants

Details Renovation of used water from poultry processing plants Renovation of used water from poultry processing plants

1987-05-07

1988-12-13

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210708, 210721, 210725, 210727, 210917, C02F 156

Patent

active

047909439

ABSTRACT:
A process for treating effluent water of a poultry processing plant for reuse in that plant. According to the present invention, a treatment of the effluent with a strong oxidant and with a substance to reduce the pH to less than 5.2 pH units, and preferably about 3.0.+-.0.5 pH units causes a floc to form together with a destruction of bacteria and a breaking of the oils and greases. The floc contains the impurities such that the water separated from the floc is sufficiently purified for reuse in certain processing steps in the plant. In the case of treating effluent water from the poultry chiller tank(s), the product water can be reused in the tank(s). In the preferred form of the process, formation of the floc is enhanced by the addition of an anionic polymer or other thickener/strengthener, and separation is achieved by dissolved air flotation techniques. A final filtration can be utilized after a readjustment of the pH to near neutral to match new water to be used in the plant. Results of a pilot facility are given, with the results indicating that USDA standards for reuse of chiller water are met or exceeded. The process has been approved by USDA for use in conjunction with poultry processing plants. Significant economic savings are realized.

REFERENCES:
patent: 3846293 (1974-11-01), Campbell
patent: 4013555 (1977-03-01), Davis
patent: 4049545 (1977-09-01), Horvath
patent: 4219418 (1980-08-01), Pilon
Literature Review, JWPCF, Jun. 1981, pp. 788-791.

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