Appeal No. 1998-0425 Page 38
Application No. 08/272,527
1. Liquid treatment apparatus comprising:
A. a natural or man-made liquid impound having a bottom
surface,
B. a network of generally horizontal treating gas supply
pipes supported in said impound above said bottom surface,
C. a plurality of diffusers comprising plenums mounted on
said pipes at elevated positions relative to said surface and
supporting a plurality of area-release diffusion elements
above said surface in communication with the network to direct
treating gas through the elements into the liquid[,]
D. a cleaning gas source in communication with the
plenums to pass cleaning gas through the elements and clean
them,
E. a plurality of flow regulating means connected with
said cleaning gas source and with said plenums for regulating
the flow of cleaning gas or both treating gas and cleaning gas
to said plenums, said flow regulating means being sized or
adjusted to deliver the gas or gases at a substantially
similar rate to each of said elements, and
F. retaining and sealing means, positioned at the
peripheries of the respective elements, for effectively
securing said elements in gas-tight relationship with their
respective plenums and preventing escape of treating and
cleaning gas from said plenums, except through said elements.
2. Liquid treatment apparatus comprising:
A. a natural or man-made liquid impound having a bottom
surface,
B. a network of generally horizontal treating gas supply
pipes supported in said impound,
C. a plurality of diffusers comprising plenums mounted on
said pipes at elevated positions relative to said surface and
supporting a plurality of area-release diffusion elements
above said surface in communication with the network to direct
treating gas through the elements into the liquid, said
elements having upper and lower surfaces bounded by porous
peripheral sides and said diffusers including means for
preventing escape of gas through said element sides into said
liquid,
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