초록 ▼

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 f

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.

대표청구항 ▼

A process for the treatment of effluent water from processing poultry in a poultry processing plant to provide product water suitable for reuse in said plant, which comprises the steps of: treating said effluent water with a strong oxidant selected from the group consisting of chlorine, potassium pe

A process for the treatment of effluent water from processing poultry in a poultry processing plant to provide product water suitable for reuse in said plant, which comprises the steps of: treating said effluent water with a strong oxidant selected from the group consisting of chlorine, potassium permanganate, ozone, and chlorine dioxide, to oxidize color and destroy bacteria, in combination with a pH-adjusting agent selected from the group consisting of sulfuric acid, nitric, acid, and hydrochloric acid, to adjust said effluent water to a pH of less than about 5.2 pH units to break oils and greases and to form a floc containing substantially all contaminants of said effluent water; and recovering a water phase from said floc, said water phase being suitable for reuse in said poultry processing plant.