Mobile unit for treating liquid waste

Claim 1

A mobile unit for treating liquid waste to render it nonpolluting and fit for ultimate disposal, comprising a truck trailer chassis provided with wheels for transportation over the ground, a mixing hopper supported by said chassis and provided with an inlet and an outlet, said inlet being adapted to be connected with means for delivering liquid waste to the hopper from a source of supply, said outlet being adapted to be connected to conduit means extending from the hopper to a disposal area, a substantially rectangular bin for a powdered silicate setting agent mounted on said chassis and having an outlet at its bottom, upright partition walls in said bin mounted on its bottom to form a plurality of chambers, substantially flat porous members covering said chambers to form a porous floor in the bin spaced above its bottom and sloping toward said bin outlet, a source of compressed air, pipe means connecting said source with each of said chambers for delivering compressed air to the space in the bin beneath its porous floor to form a fluidized bed of setting agent above said floor, valves in said pipe means for controlling flow of air therethrough to the different chambers independently of one another, said pipe means and said valves being constructed and arranged to control the bulk density of the setting agent in said bin and prevent deadspots therein, means for delivering setting agent from said bin outlet to said hopper, means in the hopper for mixing setting agent with liquid waste therein, a tank for liquid alkali metal silicate mounted on said chassis and having an outlet, and a conduit connected to said tank outlet for delivering silicate to the hopper mixture.