Paul Nickerson

Posts Tagged ‘Press Cake’

Press Cake Purge Valve

In Aquaponics on November 29, 2012 at 3:48 pm

This is a short clip on the operation and effectiveness of the recently installed purge valve on the aquaponic system at Messiah College. The valve is used to drain excess press cake waste from the supply manifold to reduce the amount of clogging problems we initially had in the system. The valve is working great!

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FshyPlnts Welcomes 14 New Fingerling

In Aquaponics on August 29, 2012 at 2:23 pm

Today I decided to remove the spent tomato plants from the system and was met with a wonderful surprise. Cleaning the sump tank is a fairly standard procedure. Remove the plants, then the mats. Skim the water to remove any debris or plant matter, and then replace the rafts and plants. That is what I planned on doing this afternoon. Aquaponics teaches you to be flexible and to go with the flow.
While removing the mats I realized there was a small fish in the sump tank. The tilapia reproduced a few months back, but since seeing the initial eggs, there have been no signs of progeny. Determined to get that little fish back into the main tank, I grabbed a net and headed to work dredging aimlessly in the murky water.

When I pulled the net from the tank, two fingerlings emerged. Confused, I began to drain the tank while hunting for other fish. After about 40 minutes of splashing around in the sump tank I relocated 14 fingerlings, all healthy and well-developed, into the main tank. We now have evidence that on a diet consisting entirely of sunflower press cake, tilapia can effectively survive and reproduce. Furthermore, fingerlings are capable of living healthily in a system entirely fueled by sunflower press cake.

Research Symposium Presentation

In Alternative Agriculture, Aquaponics on April 28, 2012 at 8:27 pm

Here is a copy of the presentation I gave at the Messiah College Research Symposium today. It was a ‘brief’ overview of the research we have been doing to establish a system that is fueled by sunflower seed press cake from the SunFlower-Power project on campus. You can’t quite make out the slides in the presentation due to the lighting.

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