American environmental engineers from Johns Hopkins University in Maryland have found a way to naturally purify cattle manure, removing environmentally harmful substances and turning the waste into flammable methane gas. The study was published in the scientific journal magazine Total Environmental Science (STTE).
“The increasing use of antibiotics and pesticides in agriculture poses a significant risk to human health and the environment, so it is very important to develop measures to reduce their negative effects,” said Associate Professor Carsten Prasse, one of the authors of the study.
Researchers examined the possibilities of processing manure using anaerobic digestion, that is, the fermentation of biomaterial in an oxygen-free environment. A similar approach is currently used to treat sewage sludge.
Scientists analyzed 20 common substances obtained from cattle waste during anaerobic digestion in the laboratory. They found that 11 of these elements decayed, forming 47 new compounds in the process.
The team also made an important discovery: Removing chlorine from organic compounds results in less persistent and generally less toxic transformation products.
Previously in Japan Experienced Rocket engine powered by biomethane obtained from cow manure.
Source: Gazeta
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