Dissolved oxygen inside the plumbing

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Roadblock007

Well-Known Member
If my tank is bubbling away adding DO to the nutrient how long will stay in the water inside the pipes from one irrigation to the next, from my pump to the dripper is 5ltrs held in 50 ml pipe, with young plants they wont get fresh tank water they the water sitting in the pipe, it has a octobubbler which seals off the outlet from back pressure, and an inline check valve to keep the system full.

Just got me thinking that the plants are only getting water held inside the pipe, unless I water over the 5ltrs they don't get tank water, could this water be dumping DO, or being sealed it holds onto it like a soda can holds its gas.
 
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Roadblock007

Well-Known Member
At the start maybe once a day and being only 4 plants they don't get the 5lrs stored in the pipe, the cycles will build to multiple as they get bigger, its that 24 hrs gap in the starts that Id like to know what the DO is doing in the pipes, because if it's lost the plants will get no DO until they get going and I can shorten the time adding more volume which would clear the pipes every irrigation, Im have some trouble with the starts and maybe this could be a part of it, Im thinking DO will stay in the water if it's sealed in pipes but I can't find anything specific on it..
 
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GreenHopper

Member
Roadblock007 said:
If my tank is bubbling away adding DO to the nutrient how long will stay in the water inside the pipes from one irrigation to the next, from my pump to the dripper is 5ltrs held in 50 ml pipe, with young plants they wont get fresh tank water they the water sitting in the pipe, it has a octobubbler which seals off the outlet from back pressure, and an inline check valve to keep the system full.

Just got me thinking that the plants are only getting water held inside the pipe, unless I water over the 5ltrs they don't get tank water, could this water be dumping DO, or being sealed it holds onto it like a soda can holds its gas.

Big difference you have a open to atmosphere system the soda can is sealed until you open it to atmosphere and before you know it it to will be flat
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I wont beable to answer the question but maybe to identify a few of the variables that will change the duration of time the o2 is suspended.
Air readily drops out of solution in a decrease in velocity. So could say an increase in current or velocity will help keep the o2 suspended. Also i believe temperature may have an effect. Higher temps o2 more readily drops out.
All chicken scratch ideas are always open for debate if something doesnt sound right
 
G

GreenHopper

Member
Roadblock007 said:
If my tank is bubbling away adding DO to the nutrient how long will stay in the water inside the pipes from one irrigation to the next, from my pump to the dripper is 5ltrs held in 50 ml pipe, with young plants they wont get fresh tank water they the water sitting in the pipe, it has a octobubbler which seals off the outlet from back pressure, and an inline check valve to keep the system full.

Just got me thinking that the plants are only getting water held inside the pipe, unless I water over the 5ltrs they don't get tank water, could this water be dumping DO, or being sealed it holds onto it like a soda can holds its gas.
Click to expand...
Even in sealed ( Closed Loop Systems air will drop out of solution and seperate with no velocity or if velocity falls below min design levels
 
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