Smoothdog's 150DD build

Okay, so here's a couple more shots of the recirculating biopellet reactor that a couple of people asked about. It's just a phosban 550 and I added some t's to the input and output sides to make it recirculate. I finally got it connected and have been running for a couple days with no media to leak test it. I may move the T on the output side down to the bottom so I can more easily drain it. I also need to get some pellets in there now to make sure they will tumble well with the pump size I used.

The theory with using a recirculating reactor with biopellets is that you can create high flow rates needed to keep the pellets tumbling well while controlling the feed flow, instead of the amount of pellets, so as not to overfeed the reactor and create a bacterial bloom in the tank.


DSC_1806.JPG by ksw2005, on Flickr


DSC_1807.JPG by ksw2005, on Flickr
 
I also added the hose holder to the ato mount. Just drilled hole in a square peice of scrap acrylic I had laying around and mounted to the bracket. The hole is big enough for the hose to fit through, then put an air hose coupler in the end of the hose that won't fit back through. Works like a champ dripping ro/di water right onto the float switch to keep it clear of salt creep.


DSC_1813.JPG by ksw2005, on Flickr
 
Yeah, I'm gonna move a few things in this weekend and if all goes well start moving the rest within the week. You about ready for the tank?
 
Yeah, I'm gonna move a few things in this weekend and if all goes well start moving the rest within the week. You about ready for the tank?

I could come by not this but next weekend if you are ready but no rush!! Make sure everything is safe and ready on your end. I don't what you killing stuff. I'll need frags in a few months ha ha.
 
Great job Kirk , your are giving me some good ideas for my rebuild. Do you have additional water storage other than you ato tank? Sorry if that has already been said, hard to read with sponge bob and 2 kids saying daddy... Daddy..daddy lol
 
I could come by not this but next weekend if you are ready but no rush!! Make sure everything is safe and ready on your end. I don't what you killing stuff. I'll need frags in a few months ha ha.

I put a couple of test frags in the new system tonight. If all looks good tomorrow, I'll gradually start moving stuff. I'm supposed to be picking up the new flooring for the family room on Thursday so as long as everything goes well I'll be ready next weekend.

Great job Kirk , your are giving me some good ideas for my rebuild. Do you have additional water storage other than you ato tank? Sorry if that has already been said, hard to read with sponge bob and 2 kids saying daddy... Daddy..daddy lol

Thanks Jason. The 20g ato is the only on hand water storage currently. The ultimate plan is to make the big acrylic tank with the manifold attached a water change tank. It will just add additional volume, then when I want to do a water change there is a drain at the bottom of it so I can just shut it off, drain it, fill with RO and add salt, then once parameters are right open the manifold valve again adding the newly mixed water to the system. I also still have my 45g brute can still, so that may come into play later, it's still a work in progress. :D No worries, I have 2 10yr olds so I've already felt your pain twice at the same time. :lol:

Looks pretty schmancy:D
Thanks, that's the idea. ;) I've gone the low tech route for many years now with mixed results, so now I'm going to swing the other direction. Lugging a 2g jug up the stairs every day and manually dosing for the past 7yrs has gotten old. :p
 
Soooo, I'm going to have to make some modifications to the TLF reactor. Apparently I misread something somewhere and used a 250gph pump which is what is rated for GFO on this reactor. I may have been looking at the specs for running biopellets in a TLF 150 too. Anyway, it looks like I will need something in the 700gph range to make the pellets tumble hard enough. I've got an old gently used Mag7 so it looks like I'm going to have to dig up some fittings to make that work with the 1/2" fittings on the TLF550.
 
Still not sure how you are regulating the pump from pulling and pushing more on the inlet and outlet rather than recirculating in the chamber... Do you have two ball valves on either end to correct for return pressure?
 
Soooo, I'm going to have to make some modifications to the TLF reactor. Apparently I misread something somewhere and used a 250gph pump which is what is rated for GFO on this reactor. I may have been looking at the specs for running biopellets in a TLF 150 too. Anyway, it looks like I will need something in the 700gph range to make the pellets tumble hard enough. I've got an old gently used Mag7 so it looks like I'm going to have to dig up some fittings to make that work with the 1/2" fittings on the TLF550.

Correct me if I'm wrong but those are 3/8 or at the most 1/2" ID fittings and pipes. I don't think you can force 700GPH through that. At least not without creating major pressure on everything.

If you have a MaxiJet 400 I would try throwing that on there. Those are not pressure rated like the Mag7. The fittings should be pretty close to the size you have. You may have to play with the inlet a little. These pumps worked great for the Sulfur Denitrators I used to build.

One more thing I would change. I learned that it is better to control the outflow from the reactor instead of the supply. For some reason when you restrict how much water flows into the reactor you end up with air in the reactor after a while. At first I thought it was the Sulfur creating glasses but then I ran several tests without media and I would get the same result. Once I started restricting the output from the reactors the problem was solved. There is a fancy explanation for this but it's too lengthy for me to write up at 8 am :)
 
Still not sure how you are regulating the pump from pulling and pushing more on the inlet and outlet rather than recirculating in the chamber... Do you have two ball valves on either end to correct for return pressure?

He's restricting the inlet. Note the array of ball valves on the plenum above the reactor. By doing so he's recirculating inside the reactor but read above for a better way of ding this.

P.S. @ smoothdog: Sorry I'm taking over your thread. I spent countless months on research, prototype building and testing of all kinds of reactors. I'm kind of a expert ha ha.
 
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