Patent ID: 6261446
Filing Date: 2001-07-17
Classification: B01D

Abstract:
In a sewage separation system comprising:a chamber for receiving sewage containing water, oleaginous materials and solids, in which at least a portion of the solids can settle to the bottom of the chamber and at least a portion of the oleaginous materials can rise to the top of the water;a discharge line for passing sewage from said sewage separation system into a transport line, separate from said chamber, that leads to a sewage treatment plant that is separate from the sewage separation system;means for grinding at least a portion of the solids that settle to the bottom of said chamber;a conduit for conducting a slurry of the ground solids in water from said chamber to said discharge line, said conduit having a terminal opening where it is connected to said discharge line; andmeans for preventing at least a portion of the oleaginous materials in said sewage separation system from entering said discharge line;the IMPROVEMENT wherein said system includes a pressure relief line, running from said conduit, that allows head pressure to be released into said chamber, said pressure relief line having an inlet opening where it is connected to said conduit, and said pressure relief line being connected to said conduit downstream of said conduit's point of highest elevation.