Conceptual artist Matthew Mazzotta is using dog faeces to power lampposts in a park in the US city of Cambridge, Massachusetts
Mazzotta’s Project Park Spark, which was funded through MIT and created in partnership with the City of Cambridge, comprises of a special “methane digester” which converts freshly scooped poop into methane.
Dog owners collect their dog waste in a special biodegradable bag and throw it into the digester – an air-tight cylindrical container, where the dog faeces are broken down by anaerobic bacteria. A byproduct from that process is methane which can then be released through a valve and burnt as fuel. In this case it is being used to power an old-fashioned gas-burning lamppost in a park.