| 摘要 |
A process and system for removing animal processing contaminants and fats, oils, and greases from large volume quantities of waste water. In the proces s, a waste water stream containing the contaminants is treated with a chemical oxidant, polymer compound and coagulant to create a particle having a diamet er greater than 50 microns. Treated waste water is passed through a microfiltration membrane which physically separates the contaminant particle from the waste water. Commercially available microfiltration membranes havin g a pore size in the range of 0.5 micron to 10 microns may be used. The treate d waste water flow rate through the microfiltration membranes can range from a t least 200 gallons per square foot of membrane per day ("GFD") to in excess o f 750 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vesse l within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids. The solid waste product may be incorporated into products for consumption by a different species.
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