Small RO/DI canister based denitrator reactor
Small RO/DI canister based denitrator reactor
Before I start this unit up, I thought I would post to get feedback. I am hopeful that my design will allow the Nitrogen to off gas through the ARM canister (though there is a manual vent button just incase).
The unit is comprised of 2 RO/DI cannisters, with the first holding the LSM (I plan on laying some bags of Matrix on top of the LSM), and the second will hold ARM. I will be using a Milwaukee MC125 PH/ORP controller to control the feed pump. The circulation pump is a Jebao DC1200 and the feed pump is a Jebao DC2000. I will probably switch to a DC1200 feed pump later, but only have a DC2000 on hand at the moment.
There is a check valve on the input and on the output of the LSM canister. I am running the canisters in reverse with a PVC tube to get an upflow effect. This will be running in the sump. The Jebao pumps are not external capable.
Ignore the stand in Chinese PH probe in the photos, I did not want to unwrap the Milwaukee ORP probe.
This shows the whole system
Here is a close up of the recirculation flow.
The PVC tube is just pressure fitted (not glued) so that it can be adjusted for length. The tube uses a slip x slip on the bottom and a slip x FPT on the top. The FPT end slides over nub on the canister lid snuggly. I also put an o-ring on the nub for the union to seat/seal against. I just made some slits on my mitre saw. I thought about making an acrylic diffusion disc on my CNC to rest on the shoulder of the slip union, but decided against it since it would leave a lot of unused space a the bottom of the cannister. If I get too much channelling, I guess I could make a disc that slips over the union and includes standoffs to set the space below it. For now I will include a plastic mesh needlepoint disc in between the LSM and the Matrix bags just to hold the LSM down in the flow.
I included plenty of unions so that it can be easily broken down for maintenance. I learned from past DIY projects that were too permanent and very hard to maintain . I also used threaded fittings so if it ends up being a bust, I can disassemble the unit and re-use most of the parts.
Here is a top down shot showing the reverse flow and the manual vent buttons. Hopefully the stainless screws hold up well in salt water. If they prove problematic I will remove them and seal the holes.
I plan on starting it up later today off line in a barrel using tank water to allow it to cycle.
Dennis
Small RO/DI canister based denitrator reactor
Before I start this unit up, I thought I would post to get feedback. I am hopeful that my design will allow the Nitrogen to off gas through the ARM canister (though there is a manual vent button just incase).
The unit is comprised of 2 RO/DI cannisters, with the first holding the LSM (I plan on laying some bags of Matrix on top of the LSM), and the second will hold ARM. I will be using a Milwaukee MC125 PH/ORP controller to control the feed pump. The circulation pump is a Jebao DC1200 and the feed pump is a Jebao DC2000. I will probably switch to a DC1200 feed pump later, but only have a DC2000 on hand at the moment.
There is a check valve on the input and on the output of the LSM canister. I am running the canisters in reverse with a PVC tube to get an upflow effect. This will be running in the sump. The Jebao pumps are not external capable.
Ignore the stand in Chinese PH probe in the photos, I did not want to unwrap the Milwaukee ORP probe.
This shows the whole system
Here is a close up of the recirculation flow.
The PVC tube is just pressure fitted (not glued) so that it can be adjusted for length. The tube uses a slip x slip on the bottom and a slip x FPT on the top. The FPT end slides over nub on the canister lid snuggly. I also put an o-ring on the nub for the union to seat/seal against. I just made some slits on my mitre saw. I thought about making an acrylic diffusion disc on my CNC to rest on the shoulder of the slip union, but decided against it since it would leave a lot of unused space a the bottom of the cannister. If I get too much channelling, I guess I could make a disc that slips over the union and includes standoffs to set the space below it. For now I will include a plastic mesh needlepoint disc in between the LSM and the Matrix bags just to hold the LSM down in the flow.
I included plenty of unions so that it can be easily broken down for maintenance. I learned from past DIY projects that were too permanent and very hard to maintain . I also used threaded fittings so if it ends up being a bust, I can disassemble the unit and re-use most of the parts.
Here is a top down shot showing the reverse flow and the manual vent buttons. Hopefully the stainless screws hold up well in salt water. If they prove problematic I will remove them and seal the holes.
I plan on starting it up later today off line in a barrel using tank water to allow it to cycle.
Dennis