lduncan Posted October 5, 2006 Report Share Posted October 5, 2006 We studied if UV disinfection increases the amount of microbially available forms of organic carbon and phosphorus in drinking waters with different characteristics, and if these changes in water chemical quality could enhance the microbial growth in drinking water. The UV(254) dose (15-50 mWs/cm(2)) used in waterworks reduced the concentration of assimilable organic carbon and the sum of the molecular size fractions. The release of microbially available phosphorus needed higher doses (204 mWs/cm(2)) of UV(254) radiation. Impact of UV disinfection on microbially available phosphorus, organic carbon, and microbial growth in drinking water. Water Research, March 2003 Quote Link to comment Share on other sites More sharing options...
KP Posted October 5, 2006 Report Share Posted October 5, 2006 Sorry, but who are you quoting? :roll: :roll: Quote Link to comment Share on other sites More sharing options...
Fay Posted October 5, 2006 Report Share Posted October 5, 2006 JDM wroteim running a deltec 1250, good skimmer really, i think reef is right that the tank is cleaner, just looking now my rocks are looking cleaner and not as dark as the have been. Your tank is looking very good. I got my nitrates down by half by cutting feeding in half e.g. meaty one day dry the next I have 24 fish and some are big so have to make sure they get enough, they get the same as if I was feeding once a day but have changed it into four feeds. nori in morning for tang, angles, trigger and anyone else that wants it, I add fresh crushed garlic to it and fold it up. Lunch is pallet or frozen dinner is spirulina flake supper is cyclop-eeze. I have found the fish let you know if they aren't getting enough. It's a pain having to feed like this but I am home all day so can do it. The trigger stopped nipping my butterfly fish as soon as I went to four feeds. I also add vodka 5mls twice day for 1000net ltrs Do water changes monthly now which is over due because of rain and the nitrates are 15 which I am happy with. More important to me is Phosphates I run a Deltec reactor for this. Quote Link to comment Share on other sites More sharing options...
lduncan Posted October 5, 2006 Report Share Posted October 5, 2006 Sorry, but who are you quoting? :roll: :roll: Lehtola MJ, Miettinen IT, Vartiainen T, Rantakokko P, Hirvonen A, Martikainen PJ. Quote Link to comment Share on other sites More sharing options...
Feelers Posted October 5, 2006 Report Share Posted October 5, 2006 I've read that UV actually increases the likelyhood of bacteria being skimmed. On the pond units - the distance between the bulb and the wall of the unit is important, while green algae is easy to kill with fast flow and a wide bulb to wall distance, salt tanks need a different system. In a salt tank you want to kill everything thats going past - so the distance between the bulb and the wall is short, ie the light has more intensity because it isnt dissapated through the water as far. Salt UV acts as a sterilizer, while pond UV kills algae and not much in the way of bacteria/cysts etc. Quote Link to comment Share on other sites More sharing options...
lduncan Posted October 5, 2006 Report Share Posted October 5, 2006 I'm not particularly interested in bacteria/parasite kill rates. It can be a nice side effect, but i don't think it's actually the main benefit of using UV. The photochemical reactions with organics is more important, and I think has by far more effect on the system. Splitting those C=C bonds (plus a few others) is what you should be interested in. Layton Quote Link to comment Share on other sites More sharing options...
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