Quote:
|
what we are doing is that we are using larger sediment in order to keep the substriaght fully oxygenated (by size of particle and water flow) this will not allow for the lowering of ph and thus no unbinding. The reaction zone or plenum zone is where all the lower ph and denitrifing occurs. you will get some melt down thier which will unbind the the sand and release its composition, but again with the larger particles and good flow it will quickly bind the phosphate back up because the water in the be is oxygenated and thus higher in ph
|
thats Mikes answer to this statement...
Quote:
|
You are going to have to fine tune very carefully the thickness of your bed Vs the grain size you plan to use. The larger size substrate is only going to make it harder to fine tune that flow to boot. While it's a great idea in order to solve the clogging issue, I'm not sure if it's going to work or not.
|
Quote:
|
by flushing the bed and plenum area, we effectively wipe out the nitrate reducers. I think we can all agree on that.
|
not quite....no wipe out should occur since the anerobic bacteria are facultative, (prefer to live in unoxygenated water due to a lack of competition from other bacteria) but they can live and function in oxygenated water. So you won't have to worry about building up a population again. In all honesty this info on the facultative bacteria is solely from Mike. Not that I doubt him, but I don't know what species of bacteria we are actually disscussing, and havent seen any scientific studies done to prove this, but I suspect, (hope) Mike does.
Nick