Rich Hampel wrote:
What he proposes is a fermentation-air injection. Nothing more than a
small air pump (like the size on a large fish tank) 1/8"dia plastic /
tygon tubing connected to a porous ceramic block (sparge nozzle) in/on
the bottom of the tank to promote a relatively large surface/amount of
air bubbles. The air injection will promote aerobic fermentation and
the 'rise' of the bubbles in the fluid will constantly (but slowly) mix
the tankage - (called: sparging). This is equivalent to the very
common fermentation pilot scale air injection in the biopharm industry.
Saw a 'commercialzed' version of this at the Atlantic City boat show
about 4-5 years ago - dont remember the name of the displaying
manufacturer, just remember that it was well overpriced.

The Groco Sweetank is a bit different from what you describe. You might
want to take a look at it: http://www.groco.net/parts/data/622.pdf

If effectively aerating a holding tank to eliminate odor were as simple
and inexpensive as some people think it is, there'd have been a whole
bunch of cheap ones on the market long before Groco ever developed
theirs. Nor do Groco products have a reputation for being over-priced.

--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://69.20.93.241/store/customer/p...40&cat=&page=1