Articles on emerging technologies and pilot solutions: nutrient recovery, digestate fertilisers instead of mineral fertilisers, biomethane and bioLNG in transport, biohydrogen, CO₂ capture from biogas, digital process control and new feedstocks. We describe what already works commercially, what is at the research stage and what conditions must be met for a solution to make sense.
An Independence Day summary: environmental protection as a duty and a privilege, the closed loop in the practice of a biogas plant, and the honest limits of what technology can do.