Laserfiche WebLink
CHAIR RAIJ GAERTEL o yes, it's the same thing. Instead of GEO map they use their bundles. <br /> They're not 20 rated, but I used that as an example. That's the only one I can speak about that I <br /> have seen data for that isn't research that I can't talk about. If that makes sense. There is another <br /> proprietary company that is working with this design that is a chamber product that is not <br /> concrete. They are researching it and I've seen data from that looks fairly good but it is not <br /> concrete chamber, it's a different product. There are some unknowns here. <br /> r. Harrington: I have something that I drew up to show, if we did a 50% underdrain on the <br /> leaching so that you could return half and I think that sending it back to the septic tank, back to <br /> an ???? zone would add additional denitrification, <br /> CHAIR BAIL GAERT L ; Yea, this could work. Stoneybrook University is doing some research on <br /> this exact concept. Basically you're creating an RSF,just with some layers. <br /> r. Harrington: except one half will go back in the soil and the other half will get captured and <br /> recirculated. <br /> CHAIR RAIL GAE TEL m So you can imagine that there is a box full of sand and trickle wastewater <br /> over the top of the whole thing. Part of it is bottomless so that would go into the ground and <br /> part of has a liner to catch part of it to send back to the headwors/septic tank and part of gets <br /> continually recycled with some of going out to the ground for final disposal and some of be <br /> recirculated a bunch of it back to the septic tank. <br /> r. Harrington: There's a tank, a pump chamber, the pump pumps it up to a manifold which is <br /> below the laterals and these are smaller diameter pipes which are perforated and so it's just like <br /> a standard. It can be done inside the chambers or in a leach field situation and as the effluent <br /> travels down through the filters, the layer cake, you're capturing 50% or some percentage of it <br /> and then flowing it back to the tank. The nitrification process get aerated because it's pumped <br /> inside the chambers. It goes down through and hopefully settles in a anoxic area a little better <br /> only has to pause for a short time and then some denitrification will occur in there. There will be <br /> some anaerobic bacteria that will break it down and the other 50%goes back to the tank where <br /> it's truly in a anoxic zone where there's no oxygen and there's also lots of anaerobic bacteria and <br /> there's lots of carbon source to keep bacteria alive,that's the key that the denitrification process <br /> is that recirculation. And I think that's why the FAST systems suffer and the commercial systems <br /> o better because the fast commercial systems have the recirculation line and the residential <br /> systems don't. <br /> CHAIR RAU GA RT L ; Stoneybrook is looking that in the context of, I'm pretty sure they tried <br /> it on this design. So they put the wood chips in there to provide that carbon source so you get a <br /> single pass. ???? layer is for nitrification, it has a lot of air, you take ammonia and turn it into <br /> nitrate and then, in a non-saturated system, it's a partially anaerobic air because there is not <br /> enough oxygen down there and because there is no oxygen, it will say hey I've got some nitrate <br /> here and I want that oxygen. So they're use it but they also can't fix carbon from the atmosphere <br /> with a lot of bacteria so you have to give them some carbon source. The wood chips are there <br /> to provide that carbon source for them but it's not as easy for them to access because it's wood <br /> and it's not as easy to break down. The thinking here is if you recirculate some of that back to <br /> the septic tank the carbon that's there is really easily accessible. Its poop, it's already been <br />