Green Options » anaerobic

Marine “Dead Zones” Will Increase, Scientists Predict

Michael Ricciardi — Sat, 25 Jul 2009 21:34:50 +0000

So-called “dead zones”–patches of ocean lacking aerobic (oxygen breathing) life–will most likely increase due to a rise in carbon dioxide (CO2) concentrations.

Because of CO2 build up in the atmosphere, its level of concentration in the oceans also increases. There, some of the CO2 converts to a simple acid called carbonic acid. (H2CO3).

What is becoming a much-studied phenomenon in recent years, these dead zones of depleted oxygen (02) - typically found at depths between 300 and 600 meters–are the result of several factors working separately and in combination: lower sea surface 02 levels, less heat exchanging (”ventilation”) with mid-level ocean depths due to over-all warming, and “euthrophication events” (an over-growth of a species due to excess nutrients).

Bokashi: This is Not Your Father’s Compost

Tina Casey — Tue, 03 Mar 2009 12:42:36 +0000

Bokashi is a ramped-up, high-speed composting method first developed in Japan. What gives it the muscle that ordinary compost lacks? Think of the difference between wine and grape juice, and that’s the key to a fine bokashi.

Coskata Pilot Plant Goes Plasma

Philip Proefrock — Sat, 03 May 2008 03:27:56 +0000

Earlier this year, headlines were made on the announcement of biotech start-up Coskata promising to revolutionize the production of ethanol with a process that could use a variety of feedstocks, ranging from wood chips and switchgrass, to old tires, and even directly from municipal waste. Most importantly, it did not rely on corn or other food stocks in order to produce fuel. At the time, Coskata was predicting an aggressive timeline, with a pilot demonstration plant to begin operation in 2009, and a first full-scale plant to be underway by 2011.

Last week Coskata announced the location for their pilot demonstration plant, a facility that will begin producing 40,000 gallons of ethanol per year, starting in 2009. While that is only a tiny drop in the proverbial bucket, it’s another step along the path to having a full-scale plant in operation and producing 50 to 100 million gallons of ethanol per year.