Sog system (14 Viewers)
- Thread starter jako999
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In very hot weather we dose it with a capful of the bio washing liquid, but in cooler weather use nothing. QW find in the heat that although the SOG works well normally, that if you open the trap to use the loo it can be a bit intense, hence the 'perfume'. It certainly makes emptying slightly more pleasant! I also don't know if I imagine it, but it seems to make rinsing the cassette easier.
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pappajohn
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I think the OP is thinking of close neighbours getting a lungful of the obnoxious gas eminating from the sog especially when the charcoal filter has seen better days rather than breaking turds to slurry.
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- Oct 30, 2016
- 1,599
- 3,257
- Funster No
- 45,854
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- Hymer BMC t789
- Exp
- On 4th van so not a total newbie....
We used bio washing liquid, and find it seems to provide a waxy finish to the cassette which helps prevent and "sticky" bits sticking....
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Won't bio washing liquid kill off the bugs in a septic tank?
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Most of the enzymes in the bio liquid will have 'denatured' and change shape once they have built up a bit of temperature processing your waste matter. unless emptied very regularly and/or over dosed.
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You must have a strange loo at home. Mine flushes with a litre or more of water and goes through a s-bend and into the sewer system! No holding tank/cassette, and no need to empty.
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On our current MoHo we had a SOG fitted at the SOG factory in Germany, as I was travelling across Germany and it was convenient to call in en route a couple of years ago from the Caravan Salon at Dussledorf. The engineer who did the fitting whilst we waited strongly advised that no chemicals should be added to the cassette. He also advised that since I had previously used toilet blue stuff in the cassette, it would be prudent to have an initial thorough wash out to remove as much as possible and thus eliminate the risk of reducing the natural decomposition. I did this at the first opportunity and all has worked to plan ever since.
The SOG website says:
The increased supply of oxygen that the activated ventilator causes to flow into the cassette during use accelerates the decomposition process of the tank contents to such an extent that the use of chemical additives is no longer necessary. Even when the toilet is not used, a system is provided that is constantly open towards the outside and thus guarantees the decomposition process.
Our SOG®systems use some aspects of the principle behind the activated sludge process used at sewage treatment plants and therefore create the ideal conditions for the removal and decomposition of faecal waste.
Most sanitary cleaning products generally interfere with the bacteria used in sewage treatment plants. Some substances are more disturbing than others, depending on the concentration and amount used and how frequently the products are used. They are therefore particularly problematic for smaller sewage treatment plants located in popular tourist locations, which are mostly only suitable for use in villages. If too many travellers in these locations send a mixture of faecal matter and environmentally unfriendly concentrated cleaning products containing biocides to the treatment plants, this will cause the plants to become unstable.
It also offers advice as to the possible cause of any smells:
If, despite the SOG® system, unpleasant smells are to be perceived, especially when opening the toilet, these smells do not come from the cassette, but from the bowl. The toilets, especially the C260, C220 and C400, are completely closed by the lid, no more oxygen can get into the toilet. Since small remains of urine always stick in the toilet, the lack of oxygen leads to the formation of unpleasant odors. Warmth or hot temperatures in summer, or the use of heating in winter (the heating pipes often run in the immediate vicinity of the toilet, so that the toilet warms up) promote the formation of odors.
This problem can be eliminated by leaving the lid open or by attaching small rubber buffers below the lid so that oxygen can flow in.Polishing the bowl using a window polish for acrylic glass panes also helps, as the urine can then no longer stick so easily.
We have never experienced any smells, do not add chemicals, often go for 3 or 4 days between emptying when wild camping and, when necessary because there is nowhere convenient to dump correctly, we use a second cassette, keeping the full one for a few days longer in a plastic box with a sealable lid in the garage.
Of course, as soon as you start to add any chemicals into the cassette you start to inhibit the natural decomposition processes. This results in some smell, leading to the idea that it is essential to empty every day (or even more often) and the inclination to solve the problem by adding more chemicals.
Obviously, if you have previously been a ‘blue” user, the first time you empty in the sluice at the disposal point the colour of the content is what you expect rather than the sanitised appearance when dyed blue. After a couple of empties this became the norm and did not seem any more unpleasant a task. I even persuaded SWMBO that this could no longer be classified as a “Blue Job” and she said after giving it a go that it was no worse than changing a baby’s nappy!!!
The SOG website says:
The increased supply of oxygen that the activated ventilator causes to flow into the cassette during use accelerates the decomposition process of the tank contents to such an extent that the use of chemical additives is no longer necessary. Even when the toilet is not used, a system is provided that is constantly open towards the outside and thus guarantees the decomposition process.
Our SOG®systems use some aspects of the principle behind the activated sludge process used at sewage treatment plants and therefore create the ideal conditions for the removal and decomposition of faecal waste.
Most sanitary cleaning products generally interfere with the bacteria used in sewage treatment plants. Some substances are more disturbing than others, depending on the concentration and amount used and how frequently the products are used. They are therefore particularly problematic for smaller sewage treatment plants located in popular tourist locations, which are mostly only suitable for use in villages. If too many travellers in these locations send a mixture of faecal matter and environmentally unfriendly concentrated cleaning products containing biocides to the treatment plants, this will cause the plants to become unstable.
It also offers advice as to the possible cause of any smells:
If, despite the SOG® system, unpleasant smells are to be perceived, especially when opening the toilet, these smells do not come from the cassette, but from the bowl. The toilets, especially the C260, C220 and C400, are completely closed by the lid, no more oxygen can get into the toilet. Since small remains of urine always stick in the toilet, the lack of oxygen leads to the formation of unpleasant odors. Warmth or hot temperatures in summer, or the use of heating in winter (the heating pipes often run in the immediate vicinity of the toilet, so that the toilet warms up) promote the formation of odors.
This problem can be eliminated by leaving the lid open or by attaching small rubber buffers below the lid so that oxygen can flow in.Polishing the bowl using a window polish for acrylic glass panes also helps, as the urine can then no longer stick so easily.
We have never experienced any smells, do not add chemicals, often go for 3 or 4 days between emptying when wild camping and, when necessary because there is nowhere convenient to dump correctly, we use a second cassette, keeping the full one for a few days longer in a plastic box with a sealable lid in the garage.
Of course, as soon as you start to add any chemicals into the cassette you start to inhibit the natural decomposition processes. This results in some smell, leading to the idea that it is essential to empty every day (or even more often) and the inclination to solve the problem by adding more chemicals.
Obviously, if you have previously been a ‘blue” user, the first time you empty in the sluice at the disposal point the colour of the content is what you expect rather than the sanitised appearance when dyed blue. After a couple of empties this became the norm and did not seem any more unpleasant a task. I even persuaded SWMBO that this could no longer be classified as a “Blue Job” and she said after giving it a go that it was no worse than changing a baby’s nappy!!!
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- Apr 24, 2023
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Lenny, we're using our van more offgrid now that everything works (fingers crossed). Our last issue is one of a toilet nature... when one does ones business the smell can linger for some time and in a small box in winter where opening windows for a while isn't ideal, would a SOG be the answer...?
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We’ve had one on our flair for 23years previously on our hymer for 7 years we’ve never had any smell
and our vent is in the door ,change the filter yearly very pleased .ive always hated the smell of toilet fluid.
and our vent is in the door ,change the filter yearly very pleased .ive always hated the smell of toilet fluid.
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