After 1 week of MST, home-sweet-home, we are back in the farm!
As usual, we proceeded straight to sample collection:
More pictures of us at work - Marcus's doing the sludge analysis:
Alright, here we go! The highlight of the day, another breakthrough!!
First of all, to ensure that the gas detector was functioning normally, I did some testing on different air conditions before proceeding to the actual digestors!
21% Oxygen in atmospheric air, 1st test passed:
2nd Test: Jason was burning some weeds in the courtyard. I inserted the Gas detector probe into the emitted smog. Look at the readings registered! I never knew that ammonia concentration > 100ppm in fume (exceeded detection limit), and H2S... 12%... Still rising!
Okay, great job! The finale - Digestor Gas testing!
The results?
- Methane Concentration = 74% - this indicates high fuel quality!
- H2S concentration = 1.0 ppm - way less the seniors' value of 90 ppm (breathing in at this concentration = death). A high H2S output would also indicate digestor upset and poor fuel quality.
- The above implies that the digestor is functioning very well with such a high gas quality output.
In the meantime, while preparing for the aerobic digestion process, we realized the power plug used for the orange digestor is the industrial 3-pin and circular type. The is no mean of connecting the air pump (below) to the electrical port.
We spoke to uncle chris about this issue, he proposed that we go back to Mr Kannan and modify the power connection port:
On Next Monday, we will be proceeding to the final anaerobic stage testing and the commissioning of aerobic stage. Cheers for great process and unexpectedly excellent testing results!!
Kian How, signing off on 12/12/10, 4.00am.
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