Coil denitrator result

  • We are currently upgrading MFK. thanks! -neo
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yaserloz

Feeder Fish
MFK Member
Feb 2, 2011
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iraq
this is the vid of my project
http://www.youtube.com/watch?v=Ta8Whl5WPA4



as a result of the whole project i came up with :

in a 19.6" long pipe 3" pipe id
with 25 meter air tube 1/4" id
with old media from my sump and the filter cycel in three day
at max rate (2 drop peer second) = 0.16 ml i calculate this with timing depending on the test tube and its verey Accurate .
0.16 * 60 sec * 60 min * 24 hour = that give us 14 liter in one day

and test result from the tank was
ammonia = 0.25
nitrite = 0
nitrate = betwen 20 and 40

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tn_IMG_0988.jpg


test result directly from the filter

ammonia = 0
nitrite = 0
nitrate = 0

tn_IMG_0991.jpg


tn_IMG_0992.jpg


my 120 gallon will cycel ones through the filter every 27 day at the rate of 14 liter peer day .

the Q is how to increase thes number ????

thanks
 
If I understand the denitrator filter correctly, the way to increase the drip rate is to increase the area that the anarobic nitrate eating bacteria colonize in... which would mean a bigger container or place for them to colonize?

Not sure if this is correct but that was my understanding.
 
Wouldn't you want to increase the flow rate through the denitrator until you can measure a detectable level of nitrates in the water coming out of the denitrator?

In theory you could have aerobic bacteria in the first meter of the 25m tube consuming all the oxygen and another meter of anaerobic bacteria consuming all the Nitrates then 23 meters of dead tubing. By slowly increasing the flow until there is a detectable level of nitrates in the processed water you know you are making maximum use of the denitrator's capacity.

If the Nitrate level of the water processed through the denitrator equals the nitrate level of the incoming tank water you know you only have aerobic bacteria and no anaerobic activity processing the nitrates and your flow rate is much too high.

After you know how much flow leaves a bit of nitrates in the return water leave the flow rate there for a week or so and see if the the anaerobic bacteria population builds up to process the extra nitrates from the extra flow. If after a week there are no detectable nitrates in the outflow bump the flow up a little more. If after a week there is still detectable nitrates in the outflow cut back the flow to maximize the anaerobic activity and flow.

Of course as Nitrates levels go down in your tank the maximum flow can probably be increased. Sort of a juggling act until you find the equilibrium with for your current stocking level.
 
Wouldn't you want to increase the flow rate through the denitrator

Not sure you could do that.
The greater the flow, would guess, the greater the chance of oxygen getting into the system.
I think we can agree, oxygen is a death sentence for anerobic bacteria.

OP, what`s up with your trace amount of ammonia?
 
Oughtsix explained it very well, increase flow until just a little bit of nitrates come out then slow down just a little. All of this happening with fine adjustments and waiting in between.

Also you can increase the length of tube and/or have two sets of coils in the tube. I have one set up now that has worked in the past and is cycling again at the moment. It has a flow rate similar to yours but has (2) 50' coils inside it.

Also the denitrator removed the ammonia because it's a biofilter along the tubing moving to a denitrator inside the large tube. You should put some more bio media in your main filter to help with ammonia.
 
That is way too much of an adjustment, I would up to like 15 ml/min and wait a week. Too much flow too fast and the whole thing could crash
 
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