Adjustable baffle grit chamber

Claim 1

APPARATUS FOR TREATING A SEWAGE FLOW CONTAINING GRIT AND ORGANIC MATERIAL COMPRISING A TANK WITH INLET MEANS FOR INTRODUCING THE FLOW THEREIN, OUTLET MEANS IN THE TANK INCLUDING WEIR MEANS FOR DISCHARGING THE SEWAGE LESS THE REMOVABLE GRIT AND FOR MAINTAINING A PREDETERMINED LIQUID LEVEL IN SAID TANK, A BAFFLE ALONG ONE SIDE WALL OF THE TANK AND SPACED THEREFROM, THE UPPER EDGE OF SAID BAFFLE BEING BELOW THE LIQUID LEVEL AND THE LOWER EDGE OF SAID BAFFLE BEING SPACED FROM THE FLOOR OF SAID TANK A DISTANCE BETWEEN ONE-FOURTH AND TWO-THIRDS OF THE DISTANCE BETWEEN SAID BAFFLE AND SIDE WALL OF THE TANK, A TROUGH IN THE FLOOR OF SAID TANK BETWEEN SAID BAFFLE AND SIDE WALL, SUMP MEANS COMMUNICATING WITH SAID TROUGH AT THE INLET END OF THE TANK, CONEYOR MEANS IN SAID TANK FOR CONVEYING SETTLED GRIT IN SAID TROUGH TO SAID SUMP, SPACED AIR RELEASE MEANS LOCATED ADJACENT TO SAID SIDE WALL AND AT APPROXIMATELY THE ELEVATION OF THE LOWER EDGE OF SAID BAFFLE, SAID AIR RELEASE MEANS ESTABLISHING A GENERAL CIRCULATION OF THE SEWAGE IN SAID TANK ACROSS THE FLOOR TOWARD SAID SIDE WALL, OVER SAID TROUGH AND UPWARDLY THROUGH THE SPACE BETWEEN SAID BAFFLE AND SIDE WALL AND BACK INTO SAID TANK, SAID AIR RELEASE MEANS AND SAID BAFFLE BEING SO CONSTRUCTED AND ARRANGED SO AS TO EFFECT A TRANSPORT CURENT ACROSS THE FLOOR OF SAID TANK AT A VELOCITY SUFFICIENT TO CARRY SETTLED GRIT AND