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http://indianaquariumhobbyist.com/community/ :: View topic - Diffuser Placement inside the CO2 Reactor
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Diffuser Placement inside the CO2 Reactor

 
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tppramodk
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PostPosted: Thu Nov 22, 2007 11:35 am Post subject: Diffuser Placement inside the CO2 Reactor Reply with quote

 Hi,
 
 while  sharing  view  with  one  of  the  hobbyiest  on  CO2  reactor  i  found  that  his  view  on  placing  the  diffuser  in  the  reactor  is  at  the  bottom  (Figure  2)  Â and  powerhead  outlet  to  be  connected  to  the  top  inlet  of  the  reactor,  which  would  dissolve  CO2  in  water  in  a  better  manner  than  the  one  shown  in  (figure  1).  Â   In  the  setup  (figure  1)  there  is  a  chance  of  vaccum  formation  on  top  of  the  reactor  preventing  CO2  to  dissolve  properly.
 
 
 Which  layout  is  more  efficient?  Â experts  opinion  please!.


Last edited by tppramodk on Thu Nov 22, 2007 12:51 pm; edited 1 time in total
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rohansd
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PostPosted: Thu Nov 22, 2007 11:54 am Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 I  too  think  that  the  second  design  will  help  co2  dissolve  more  efficiently.
 Commercially  sold  reactors  from   Dymax  follow  the  same  design.
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Bala_Kavi
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PostPosted: Thu Nov 22, 2007 12:13 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 Rohan,
 
 I  would  like  to  differ  from   you.  I  feel  that  design  1  will  be  more  efficient  as  the  chances  of  co2  escaping  out  against  the  force  of  powerhead  is  less.
 
 If  you  look  at  figure1,  the  C02  has  no  chance  of  escaping  thereby  increases  the  chances  of  it  dissolving  in  water  whereas  in  figure  2,  it  can  easily  escape  out  from  the  botton  as  that's  the  flow  of  the  water  within  the  reactor.
 
 Regards
 Bala
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rohansd
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PostPosted: Thu Nov 22, 2007 12:18 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 well.
 I  think  the  drawing  is  not  too  perfect  .  where  as  the  original  design  is.
 In  the  drawing  above  ,the  diffuser  is  seen  right  in  front  of  the  exit  point.
 Where  as  in  the  actual  design,  it  is  placed  well  above  and  hence  the  fine  co2  bubbles  rise  up  against  the  water  flow  and  dissolve  better  in  the  water.
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tppramodk
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PostPosted: Thu Nov 22, 2007 12:52 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 I  have  corrected  the  pic  above.
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Deepak_Brid
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PostPosted: Thu Nov 22, 2007 3:55 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 Hi,
 
 CO2  reactor  Inverted  or  otherwise  â€“  the  one  of  the  most  important  factor  that  is  overlooked  is  the  rate  at  which  the  water  flows  through  it.  The  flow  rate  should  just  be  adequate  enough  so  as  to  hold  back  the  fine  CO2  bubbles  within  the  reactor  for  as  long  as  possible,  ideally  speaking  CO2  should  never  exit  the  reactor  in  its  the  gaseous  form.
 
 This  may  not  be  a  major  cause  of  concern  for  most  â€“  as  we  only  end  up  with  inefficient  use  of  CO2,  it  isn’t  so  expensive  &  we  leave  it  that.
 
 But,  if  you  want  to  achieve  maximum  efficiency,  this  is  what  you  need  to  look  at  -  Select  a  Power  Head  (PH)  with  appropriate  flow  rate,  a  PH  off  the  shelf  or  an  existing  filter  output  (as  most  of  us  use)  may  not  be  the  best  suited  for  this  purpose  or  all  CO2  reactors.  You  may  need  to  go  the  DIY  way  to  get  the  required  output  to  drive  the  CO2  reactor  to  its  Maximum  Optimal  efficiency.  
 
 Other  things  to  consider  or  look  out  for  are:
 1.  Size  of  the  reactor
 2.  Internal  design  â€“  bio  balls,  sponge,  baffle  plates,  etc.
 3.  BPS  (bubbles  per  second)
 4.  Orientation  of  the  reactor.
 5.  May  be  someone  has  more  inputs.
 
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tppramodk
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PostPosted: Thu Nov 22, 2007 4:18 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 Hi  Deepak,
 
 Great!.     As  i  was  aware  of  the  importance  of  flow  rate  i  have  chosen  the  powerhead  with  'flow  rate  control'.   Hope  that  wil  help  me  to  control  the  flow  rate  the  way  u  stated.   I  will  come  to  know  more  once  i  start  the  unit  as   I  am  getting  the  cylinder  this  weekend.
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rohansd
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PostPosted: Thu Nov 22, 2007 4:24 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 Deepak,  
 That  was  very  informative  Thumb Up  
 
 One  of  your  point  mentions  reactor  internal  design,
 I  have  Dymax  102  reactor  and  it  has  those  baffle  plates.
 
 Has  anyone  been  able  to  seperate  those  baffle  plates  and  rearrange  them  in   a  different  way.
 In  my  case,  the  diffused  bubbles  used  to  stick  around  on  the  baffle  plates  escaping  from  the  downward  water  flow.  The  smaller  bubbles  would  eventually  form  a  big  bubble  and  stay  there  for  longer  time.
 This  defeated  the  purpose  of  the  diffuser  stone.
 
 Any  idea  how  to  deal  with  this  one  ?
 
 Rohan
 PS:  Pramod,  am  I  hijackiing  your  thread  ?  I  thought  since  we  are  talking  of  reactor  efficiency,  I  could  ask  this  here.


Last edited by rohansd on Thu Nov 22, 2007 4:46 pm; edited 2 times in total
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tppramodk
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PostPosted: Thu Nov 22, 2007 4:35 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

 Rohan,
 
 Half  knowledge  is  dangerous....  so  lets  discuss  together  and  get  them  cleared   Smile  .   Hey  where  r  the  other  CO2  experts???   Very Happy  .
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Deepak_Brid
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PostPosted: Thu Nov 22, 2007 8:02 pm Post subject: Re: Diffuser Placement inside the CO2 Reactor Reply with quote

                                                   
rohansd  wrote  (View  Post):                

 I  have  Dymax  102  reactor  and  it  has  those  baffle  plates.
 
 Has  anyone  been  able  to  seperate  those  baffle  plates  and  rearrange  them  in   a  different  way.                

 
 Previously  these  reactors  used  to  come  with  loose  baffle  plates  that  could  be  rearranged.  However  now  a  days  these  are  glued  together.  (IMPO  -  the  reason  could  be  that  -  the  baffle  plates  snapps  off  &  the  attached  diffuser  breaks  in  transit)
 
 
                                                 
rohansd  wrote  (View  Post):                

 In  my  case,  the  diffused  bubbles  used  to  stick  around  on  the  baffle  plates  escaping  from  the  downward  water  flow.  The  smaller  bubbles  would  eventually  form  a  big  bubble  and  stay  there  for  longer  time.  This  defeated  the  purpose  of  the  diffuser  stone.  
 Any  idea  how  to  deal  with  this  one  ?                

 
 Rohan,  I’d  in  fact  mentioned  this  &  later  edited  the  post,  as  I  thought  it  would  mean  too  much  to  digest  for  one.  Chuckle  Good  you  bought  this  to  notice.  Smile
 
 Dymax  DF101  &  DF102  are  the  only  reactors  that  I've  seen  has  sintered  diffusers.  They  do  help  to  certain  extent,  but  I  personally  don't  see  them  very  useful.
 
 If  I  had  a  similar  problem  I  would  buy  two  reactors  and  use  only  the  external  cage  of  one  to  extend   length  of  the  CO2  reactor.  This  will  increase  the  probability  of  finer  CO2  bubbles  to  stay  in  the  chamber  for  longer  duration.
 
 Options  available  depending  on  the  size  of  aquarium  and  requirement
 1.  Club  two  DF101's   
 2.  Club  two  DF102's  
 3.  Club  DF101  with  DF102
 4.  DIY  option  is  always  open  Wink
 
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