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post #31 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

Any thoughts on Lectra San?

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post #32 of 114 Old 10-03-2013
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You could be right about the functional impact. I haven't done or seen an analysis that would answer the question if which is the least damaging. It will be small, either way.

Where I cruise there's lots of opportunity for the shallow hole solution, but I grant that is not always possible. Hopefully in those urban areas people can head out to sea for a standard dump.

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post #33 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

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Any thoughts on Lectra San?
It sounds to me about as close to the perfect solution as you can find. Except I don't believe you can use it in zero discharge waters.
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post #34 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

Weve had a composting head for three years now. We wanted very much to like it and in fact did love it for the first year or so. At first having to constantly empty the liquid container seemed a small price to pay for not having to deal with holding tanks and pump-outs, but now were much less convinced. After another recent infestation, weve come very close to deciding to remove the composter and to reinstall a conventional marine head and holding tank. Weve had fruit fly and fungus infestations intermittently and when they occur its an absolutely disgusting cleanup job. I think the medium was getting and staying too damp and we've rectified that to some degree (part of which means not using the toilet on port tack!), but the next time I find fungus or fruit flies - I'm done!

As for the LectraSan, I've heard them pretty widely praised for areas that aren't NDZ. If you're going into NDZ areas you have to keep the regular holding tank in parallel, which takes up a lot of space. They're also very expensive.

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post #35 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

To the OP: You have received a great deal of information and links to previous threads where this has been discussed at length. Those who have composting heads seem generally pleased with them. Remember though, that this is not a random sampling by any means and the reality is that probably 99.9 % of all boats out there that have a head do have some sort of holding tank system. The marine head/holding tank system works acceptably well for the vast majority of boaters, and as has been mentioned before, a composting system not going to be a plus when it comes time to sell your present boat.
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post #36 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

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It sounds to me about as close to the perfect solution as you can find. Except I don't believe you can use it in zero discharge waters.
I believe you can still plumb them to a holding tank if needed for those zero discharge zones like Herring Bay.

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post #37 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

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Hmmm, not sure what you mean Minn. Have you used one? There's nothing very odd or gross about it. The only real difference is men have to sit. And you have to open the trap door. Everything else happens as-per normal.
I have. I've also used an outhouse and porta potty. They're all gross, by common standards. Doesn't stop me, but I know plenty who won't use any of the above. Period.


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If you can't fully compost the waste (which takes ~3 months I've read) then it should be dumped out at sea, just like a normal marine head (once you're out past legal limit).....
If you're depositing in it every day, the moment you empty it you have nearly uncomposted waste in the mix. What would you do with it aboard to let it compost for 3 months? Therefore, dumping past the limit is really the only option and I doubt their are many that find themselves in legal dumping areas often enough to be practical. Therefore, the same raw sewage from yesterday's deposit goes straight in the trash I suspect.


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Re: Composting Toilets vs. Holding Tank

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If you're depositing in it every day, the moment you empty it you have nearly uncomposted waste in the mix. What would you do with it aboard to let it compost for 3 months? Therefore, dumping past the limit is really the only option and I doubt their are many that find themselves in legal dumping areas often enough to be practical. Therefore, the same raw sewage from yesterday's deposit goes straight in the trash I suspect.
I think that what some folks do is have a spare bucket that is sealed and just thrown in the hold and disposed of after a couple months.

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Re: Composting Toilets vs. Holding Tank

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I think that what some folks do is have a spare bucket that is sealed and just thrown in the hold and disposed of after a couple months.
Interesting. News to me that it will continue to decompose without air. That right?


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post #40 of 114 Old 10-03-2013
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Re: Composting Toilets vs. Holding Tank

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Weve had a composting head for three years now. We wanted very much to like it and in fact did love it for the first year or so. At first having to constantly empty the liquid container seemed a small price to pay for not having to deal with holding tanks and pump-outs, but now were much less convinced. After another recent infestation, weve come very close to deciding to remove the composter and to reinstall a conventional marine head and holding tank. Weve had fruit fly and fungus infestations intermittently and when they occur its an absolutely disgusting cleanup job. I think the medium was getting and staying too damp and we've rectified that to some degree (part of which means not using the toilet on port tack!), but the next time I find fungus or fruit flies - I'm done!
Put a half cup of diatomaceous earth in the bucket with each new "charge" of peat moss. It will eliminate all insect larvae. Available at any big box garden shop.

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