The Planted Tank Forum - Reply to Topic
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > DIY > Cerges' Reactor - DIY Inline CO2 Reactor

Thread: Cerges' Reactor - DIY Inline CO2 Reactor Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
Yesterday 07:21 AM
rezco
CO2 reactor -packed column

Quote:
Originally Posted by newbieplanter View Post
Im a bit interested in this idea to see how it works?
Well it took a while but here is the plan:


The concept is similar to my build of a large scale bubble column prototype. In that design I discovered that an internal venturi is highly effective at dissolving Co2 into the water. With this packed column we can get the highest efficiency in a small package. The principle of efficiency is simply due to surface area - the media forms a huge surface area for gas-liquid contact. Excess CO2 is collected in the top of the tower and is recycled by the venturi. When CO2 is consumed the water level rises and more gas is allowed to be injected. In case of confusion I would like to clarify this is not a pressurized setup.

Here's how it works:

CO2 is injected through a T junction in the incoming water. An internal venturi/nozzle sprays water over a packed bed. The ideal packing is pond filter media pictured below. This allows a thin film of water to flow down and contact the CO2 gas over a large surface area. A layer of water on the bottom allows any entrained bubbles to float up, and clear water exits to the tank.

A side mounted water level float switch is crucial to the design. These can be picked up on a Ebay for around $10. This switch is triggered when the water level rises and energizes the CO2 relay allowing more gas to flow in. The gas pressure keeps the water level down and prevents the packed column from getting flooded.if the column is flooded then the gas-liquid surface area is reduced. That's why packing media in a conventional Cerges or Rex Griggs is usually of no benefit.

The column should be around 4"dia and 12-18"in length for 200-400 gallon tanks. Flow rate can be very slow (about 100 gpm) so you only need to divert part of the flow from a canister and not compromise the performance of your filtration system. Smaller designs can be made for smaller tanks (ie. a 3" x 12" reactor for a 100 gal tank)

Gas flow rate for my bubble column setup is about 2-3 bps for a 200 gal set up so I think that this should be similar or better in terms of CO2 consumption.

Since this reactor is self regulating there is no need for a bubble counter and a precision valve and regulator. This saves a lot of $$$ and headache in fine tuning your CO2 system. A lower cost single stage regulator will do fine. The amount of CO2 delivered to the tank will actually depend on the flow rate of water through the reactor. The faster the flow the more CO2 will be dissolved out and flow to the tank.

Construction:
Made from 4" PVC pipe, I would use clear PVC on the center section, the caps can be white PVC. For easy cleaning I would suggest using 4"dia threaded PVC fittings. Float switch can are be installed with a small hole drilled on side and an O ring+ silicone sealant. Some valves come with bulkhead fittings that provide a better seal. Total parts are about $75.

Packing media:


If anyone is interested in building one please let me know and I can help you get the parts together.
04-16-2014 01:04 PM
FishStix If I really don't have the time to build my own reactor, and if I did the water filter housing I was looking at is almost $90 as I wanted the large 20" one, would I just be better off to go with CarbonDoser EXT5000 (External Reactor 5000)? It going to run on 180 gallon system with 75 gallon sump, will also be setup using it own pump.

Thanks
04-13-2014 02:37 AM
kevinmichael77 No parts yet. Still wasn't sure if it's worth it or if I could build it.
04-12-2014 10:28 PM
newbieplanter
Quote:
Originally Posted by kevinmichael77 View Post
Did it inhibit the flow at all? Only thing is I'm not handy at all so not sure I can put it together properly


Sent from my iPhone using Tapatalk
Not that i can tell, as far as assembly its real easy. Do u have parts already?
04-12-2014 10:26 PM
kevinmichael77 Did it inhibit the flow at all? Only thing is I'm not handy at all so not sure I can put it together properly


Sent from my iPhone using Tapatalk
04-12-2014 10:20 PM
newbieplanter
Quote:
Originally Posted by kevinmichael77 View Post
So would I need a powerhead of I decided to use one of these or can I just run it off my eheim 2217 canister filter? My tank is a 33 gal, right now I'm just using a atomizer but the tank gets a lot of co2 bubbles.

Thanks!
I got mine running on a cheap eheim knock off with a spray bar an its fine, that was my main concern too about a powerhead lol.
04-12-2014 09:48 PM
kevinmichael77 So would I need a powerhead of I decided to use one of these or can I just run it off my eheim 2217 canister filter? My tank is a 33 gal, right now I'm just using a atomizer but the tank gets a lot of co2 bubbles.

Thanks!
03-24-2014 01:44 AM
m00se http://www.usplastic.com/
03-24-2014 01:42 AM
newbieplanter
Quote:
Originally Posted by rezco View Post
Brass contains copper, which may be toxic to inverts such as shrimp. It is also somewhat easily corroded under acidic conditions and reacts with chlorides -although the acidity produce by CO2 is not enough to be meaningful.

The primary concern is invert and fish toxicity.If you keep doing regular water changes its fine.

You can find virtually any brass pipe fitting in plastic form (HDPE or PVC) online.
Do u have a link to places where to get the PVC pieces/fittings?
03-16-2014 10:28 PM
Josiah
Quote:
Originally Posted by Donutz View Post
I'll keep looking for PVC components. This is what I've ended up with so far...

How much did it all cost you so I have a good estimate. :-)

My Ista Max Mix started leaking. (I haven't touched it, the attachments just decided to leak). So I have been looking into something that is of better quality.
03-15-2014 01:43 AM
newbieplanter Well i threw one of these on my tank just to see the out come an i guess its pretty cool. Over the past month my tank started getting worse with CO2 looking like "soda" in a cup, anyway i had a couple filters for a few months now an wanted to see how it goes diffushion an rha whole nine. So far so good the only difference i dint have which a few others had was lowering of the bubble count / output, its only been a day an it took 6hrs for my drop checkers to change a little bit. Thats already telling me that my CO2 either aint high enough or im loosing some along the lines somewhere. With my regular ceramic diffuser it only takes a few hrs i should have timed this to see HRS exact but i do know that by the time of shut down drop checkers are a light lime green almost yello an they stay like that till sometime between 12am-5:30am. My co2 comes on at about 7:30-8:00am lights come on at 9:00am an off at 7:30-8:00pm lights off about 9:00pm. Well on to my thrown together set up,
Another thing i liked was the plants pearling a lot which told me they were using CO2 at the time they were supposed to. Drawback to this setup is how it fills to the top with water, i feel like its gonna start leaking one night or day an my aquarium is right abouve me n my wifes bedroom so u can see how this would be bad. Also the fact that my house will be flooded from all 70gals from my tank, im gonna tighten everything up later today with all pvc parts or better looken ones anyway.
03-10-2014 10:39 PM
newbieplanter
Quote:
Originally Posted by Donutz View Post
I'll keep looking for PVC components. This is what I've ended up with so far...

This is nice. Id hook it up an run it for now, till u wanna change the pieces out. I was gonna do mine like this an run it to a spray bar but i kinda nervious it wount have enough pressure to run the spray bar. Anyway thats a great set up if i ever seen one.
03-10-2014 10:24 PM
Donutz I'll keep looking for PVC components. This is what I've ended up with so far...

03-10-2014 04:32 AM
newbieplanter
Quote:
Originally Posted by rezco View Post
The trickle column design is the standard in industry in absorbing CO2 - for example from power plant emissions.



It should also work in aquaria - provided its done right. Water should pour from the top and most of the media should be exposed to CO2 - not submerged or flooded. CO2 should be bubbling from the bottom - this could be done through a dip tube. A simple counter current setup.

If anyone's interested I can post a drawing or build one for the cost of parts.
Im a bit interested in this idea to see how it works?
03-09-2014 10:36 PM
rezco
Quote:
Originally Posted by Donutz View Post
Fail! I can't seem to edit my post.

I was saying that there is an extremely limited selection of PVC at my local big box stores, so almost everything I bought was brass. Aside from the weight, are there any issues with this? I have brass fittings feeding water to my refrigerator for drinking, so I'm assuming it is safe for my aquarium inhabitants too. Do I need to clean / treat the brass in any way before sending water through it to my aquarium?

Many thanks!
Brass contains copper, which may be toxic to inverts such as shrimp. It is also somewhat easily corroded under acidic conditions and reacts with chlorides -although the acidity produce by CO2 is not enough to be meaningful.

The primary concern is invert and fish toxicity.If you keep doing regular water changes its fine.

You can find virtually any brass pipe fitting in plastic form (HDPE or PVC) online.
This thread has more than 15 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT. The time now is 08:45 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012