The Secretary of State for Energy in Her Britannic Majesty's Government

Richard H Knibbs

Dennis Wood

A filter apparatus comprising a number of filter trays arranged in layers to form a stack. Each filter tray is of a glass fibre reinforced plastics material and comprises a central web having upstanding and depending parallel ribs extending between one end of the filter tray to the other end thereof so as to define a number of parallel channels. A micro filtration or ultra filtration membrane is interposed between adjacent filter trays, and alternate ends of the channels are closed so that liquid flowing along a channel in one filter tray flows through the membrane and leaves the stack through the open end of the channel in the adjacent filter tray. The filter trays are located in a plastic tube held within a demountable pressure casing having a header plate to divide the casing into two chambers each connected to a respective end of the filter trays.

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Steventon, United Kingdom

Richard H Knibbs