Patent ID: 7972508

Claim:
A modular rotary disc filter device comprising: a. a rotary drum having an inlet for receiving liquid to be filtered and a surface having a plurality of openings; b. a drive for rotatively driving the rotary drum; c. one or more disc-shaped filter members secured about the drum and extending outwardly therefrom, each disc-shaped filter member being rotatable with the drum; d. each disc-shaped filter member including a filter disposed on each side thereof; e. each disc-shaped filter member including a modular filter frame made up, in part at least, by a series of interconnected plastic modules, each module comprising: i. a base secured adjacent the rotary drum and including an opening adjacent one of the openings in the rotary drum such that liquid can flow from the drum, through the opening in the drum, and through the opening in the base; ii. the base of each module including opposed ends and wherein each end of the base is configured to connect to the end of another base in end-to-end relationship; iii. a radial support arm projecting radially outwardly from the base and including an inner end disposed adjacent the base and an outer end disposed away from the base; f. a plurality of compartments for holding liquid to be filtered where each compartment is generally defined, in part at least, by two adjacent modules and the filters; g. wherein the openings in the surface of the drum are disposed with respect to the bases of the modules and the compartments such that liquid in the drum passes from the drum, through the openings in the bases, and into the compartments of the one or more disc-shaped filter members; h. wherein when the modules are connected together around the drum, the bases engage and rest on the drum and the openings in the bases align with the openings in the drum; and i. wherein each disc-shaped filter member includes a rim structure that extends around the disc-shaped filter member.