Recycling of Water in Poultry Processing Plants.

摘要

Studies were conducted on recycling chiller water in a poultry processing plant. The recycling system must be provided with the capability of removing solids and controlling the microbial population. UV was used to control the microbial population. For this control to be effective,solids must be removed to a level to allow light transmission. Methods studied include: (1) cyclonic desludgers, (2) vibrating screens, (3) flotation cells, (4) centrifugal waste concentration, (5) filtration with diatomaceous earth (DE) filter aid,and (6) activated carbon. Pilot-scale results showed that DE filtration was the most feasible option and that it maintained the bacterial level below that of the nonrecycled system. Operating costs for the DE filtration system with 30gallons equivalence of ice per minute are $79.06/day. Normal operating costs of the chiller without recycle are $146.90/day,thus a savings of $67.84/day.