Monday, November 1, 2010
Sunday, October 31, 2010
Our Basetech watt meter has been sitting on the Insinkerator Evolution 200 since October 16th. After daily usage our total electricity consumption is a mere .028 kWH (i.e. a mere 28 Watts) with a max draw of 352 Watts. That means we probably wouldn't ever use more than 60 watts in a month, which is about a single incandescent light bulb running for one hour, costing about 1 cent. Next stop the Okavanga Delta in Botswana where we will show that Insinkerators can easily be run on Photovoltaic Solar Power!
After 6 hours of biogas operation (this time in our apartment at a balmy 18 C ambient temp) we are down to -20 C in the freezer and -1.1 in the main fridge, sipping only 230 or so liters of biogas. This time Ahmed Khalifa and I have put Ahmed's data logger inside so we will publish graphs... soon. We also will explore how quickly the fridge loses heat when the gas is off,with and without extra insulation. The great thing is that we are almost 40 C below ambient, which bodes well for African applications. In the end we got 6 hours and 45 minutes from less than 300 liters. Last time we ran for 7 hours (and got down to -26.2 C in freezer and -4 C in refrigerator).
A great website with instructional material and videos for constructing one's own fixed dome digestors. The Vietnam experience, like that in China, includes all human wastes in the digestor. The Netherlands gave a 2.5 Million Euro grant to cover 12 provinces. Why this isn't being done in Haiti or Nigeria with the current Cholera outbreaks, is a mystery to me.
Project “Biogas Program for the Animal Husbandry Sector in Vietnam” is implemented by Livestock Production Department (under MARD) in cooperation with Netherlands Development Organisation – SNV. Overall objectives of project are (i) exploiting effectively biogas technology and developing a commercial product.
A million kilowatt hours of electricity a year and all the cooking fuel for the factory -- this rice wine factory in China is proving the industrial ecology model and creating a beautiful aesthetic too.
Chinas frantic development depends on escalating electricity generation - at great cost to the environment. But in the remote south-western province of Guangxi the application of simple technology allows millions of poor families to cook and keep warm with biogas made from human and animal waste.
Got first flammable methane from diaper-waste fed bathroom biodigestor after a month hydraulic retention time at an average temp of 20 C. Now confident we should bring the macerating toilet pump to Botswana to include in our project there.
Indelicately put, our campaign is called "Take care of your own sh%t!". If we had a code of ethics that said "every family is legally and morally responsible not only for what goes into their house but what comes out", and you had to prove your wastes could cause no harm to others before discharge to our environment, there would be no cholera or other waste and water-borne diseases killing children right now.
Thomas Henry Culhane We won't add kitchen waste to this until we understand how much loading it can take with fecal material on a weekly basis, and examine the effluent after processing in a second tank to see what the reduction in E coli is, if any.
Thomas Henry Culhane This series from Vietnam is one of the best for understanding exactly how to build a fixed dome underground biodigestor from brick and mortar.
Translation was completed on 27/08/2010 These models called "KT1, KT2" are being applied in the Biogas Support Program in Vietnam. (www.biogas.org.vn) So far, there are about 250,000 biogas plants constructed in Vietnam. In which, the fixed dome model accounts for about 60%, VACVINA model accounts
This series from Vietnam is one of the best for understanding exactly how to build a fixed dome underground biodigestor from brick and mortar.