Not a good one, I'm afraid...for several reasons.

Thecnical obiection noted....
.....
Nor would adding chlorine--or any other chemical--to a tank meet any
legal requirement in the world for "treated" waste. Even waste that's
been treated by a legal device before going into a tank is no longer
considered treated once it does. So nothing is accomplished by adding a
chemical to the waste before or during dumping the tank.

You look at the idea from a legal point o view...
My target wasn't to comply with any law, but is one attempt to find a
radical solution to odor control.
In your articles you talk about a sanitizing device that works both as type
1 and type 3...
Sometingh like that...
But custom made to fit in the available spaces...

The related laws are changing here... Don't know how it will be in the near
future...



If the discharge of treated waste is legal in your waters, consider
installing a PuraSan or Lectra/San instead of a tank. More expensive
than a tank, but beats the socks off carrying waste aboard and all the
hassle of maintaining a tank if you don't have to.

I like it, but, disregarding the cost, it can't fit... I am building a small
cat...

Anyway Your comments have helped a lot to clarify the problems.

I will try to find one standard tank, if unable to find a suitable one (one
that make efficient use of available space), i can have one custom made here
in Italy or from one of the suggested european manufacturers...

Tank you!

Paolo