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[compost_tea] oxygen readings



Title: [compost_tea] oxygen readings
Hi to everyone and  Elaine if you are listening

I have been brewing compost tea for a couple of mths now down here in New Zealand. Since attending your seminars and the 3 day  workshop Elaine held in Cambridge. I am using the MEND  Brewstar Microbe Booster from Nuti-Tech Solutions in Australia which uses a pump / heater / aerator through a  venturi system.  I am brewing 1000 Lts at one time.

I have been achieving good oxygen readings during my brewing cycle but once I stop aeration the oxygen readings drop off within minutes. At end of brewing I have a reading of 7.4 ppm  within 5 minutes of turning  off the aeration it was down to 3.5 another 5 minutes and it was down to 2.5. I then turned the aeration back on and within 5 minutes it was back to 6.6. My question is what is happening to the microbes turning this time, and is this a normal reaction. I can¹t imagine that it is going anaerobic in such a short time frame.

I am now leaving the aeration running  while drawing  tea from the brewer  into the spray tank, I¹m using  4 to 6 spray tanks depending on spraying pressure to empty the brewer over a period of 6 hours.
I also took  a reading from the spray tank  prior to spraying and the reading was down to 2.5 ppm

Also has anyone done any work with energising the water before brewing. I have been energizing the water for 60 minutes by creating a vortex and changing to rotation clockwise to anti-clockwise very 15 minutes. Once energized then I start brewing. We have found by doing this we can reduce the brewing time.  However until the  New Zealand SFI  Lab is up and running  in early March we won¹t know what the advantages are.

James Croskery
Gracewood Organics
KatiKati
New Zealand

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