Nitrogen Recovery from Wastewater: Possibilities, Competition with Other Resources and Adaptation Pathways

Due to an increased food production the demand for nitrogen and phosphorus as fertilizers grows. Nitrogen based fertilizers are produced with the Haber-Bosch process through industrial fixation of N2 into ammonia. Through wastewater treatment the nitrogen is finally released back to the atmosphere as N2 gas. This nitrogen cycle is characterized...

Proof of the Pudding: Applying the City-Zen Methodology to Other European Cities.

Back in 2012, a group of enthusiasts submitted a project proposal to the EU. Many talks, partner proposals, and city explorations later, City-zen was granted EU-funding “to develop and demonstrate energy efficient cities and to build a methodology and tools for cities, industries and citizens to reach the 20-20-20 targets”. The program, rooted...