Originally Posted by Bacchus
........ any reference to aeration via bubbler........... I'm convinced the problem is insufficient air. The tank is difficult to get to and runs would be longer than desired even if I could get another vent attached...............
I have a 36 DC Mainship. I don't know what your vent set-up is, but if it's anything like mine, the only way to get a straight vent line would be to make a hole in your roof and that is out of the question. Obviously, we had the same problem.
There are 2 main types of bacteria that attack and digest human waste. Aerobic which thrive in an air rich environment do not have a significant odor. The other type is anaerobic which thrives in a low oxygen environment and stinks like $hit. The type of bacteria that you get is from the environment you create - either airy with a good vent line or stagnant with poor ventilation. A bubbler should work great although not really necessary. If you have the air supply for the bubbler, that is all you need - just the air. I'm not sure if the agitation from bubbles would cause more odor by stirring thins up or less odor because the aerobic guys are working in a better environment, I'm sure if Peggy gets back on here she would have an answer and I would go with what she says.
Do you have the old Sea-land Traveller heads that look like they belong on RV's? The type with the pivoting flap?
I just put in a PuraSan Waste Treatment System with an electric toilet and that solved the problem for the forward head. A bit extravagant but since we live aboard, this eliminates our pump-outs and is worth it to me.