At Carimate (Como, Italy) ...

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At Carimate (Como, Italy) there is a working example. Contrary to many other cases, they operate a first stage mesophilic (fed on sewage sludge) and a second thermophilic stage, fed on biodegradable liquid wastes. As these wastes do not require heavy hydrolysis to be degraded, and due to the over-sized digester, the process  runs steadily with a very good production of biogas (70% methane). You may ask more info at: responsabile.tecnico@sudsevesoservizi.it (ing. Marco Bernasconi; warning: he does not speak/write in English). Website (in Italian): http://www.sudsevesoservizi.it/Objects/Home1.asp

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Hello

In an effluent of sewage containing the chemical presence of micro organisms is rare. otherwise it would be super bacteria (we do not know yet) The sludge of wastewater management stations excrement died inert.The mud is a State of decomposition of the organic matter under the action of methanisation.This environment contains more of being alive.It is difficult to conceive that human beings alive can survive in these conditions. Sludge management stations feces contain 8% of dead bacteria. Below a certain level of presence of micro organisms they survive but can no longer operate the feature of biodegradation of organic matter.In addition there are micro organisms live in a medium containing water.Off the sludge out of the wastewater management stations are dried on planks of sandy earth before being stored on a holding of the follow-up of their management area. It is imperative to dry sludge or the action of methanisation would survive on their storage making implode in permenence storage. In these dry sludge there is no sign of life of a any micro-organism. The description above applies to the term mesophilic as for the term thermophilic. It's amazing the ingenuity of people in sanitation to believe in something that is completely unrealistic. This presentation is so utopian.

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