Ammonia stripping
VALUEWASTE opens its pilot plant in Murcia: sustainable technologies for the valorisation of biowaste in EU cities
The VALUEWASTE project has opened a pilot plant in Cañada Hermosa, Murcia (Spain) to demonstrate sustainable technologies for the valorisation of urban biowaste. The facility processes the brown bin organic fraction through sorting, anaerobic digestion and digestate separation into solid and liquid fractions. From the liquid digestate, the plant recovers nutrients such as struvite and ammonium sulphate, which are used to produce high-value fertilisers. The solid fraction is transformed into protein-rich biomass through black soldier fly larvae cultivation. The pilot plant is part of an integrated circular-economy approach that converts municipal biowaste into valuable products, fertilisers, proteins and energy, while reducing waste and supporting sustainable urban resource management.
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Nutri2Cycle Nurturing the Circular Economy
The Nutri2Cycle project will assess the current Nitrogen (N), Phosphorus (P) and Carbon (C) flows looking into existing management techniques in different farms across Europe and analysing their related environmental problems.
https://www.nutri2cycle.eu/
Vacuum evaporation coupled with anaerobic digestion for process intensification and ammonia recovery: Model development, validation and scenario analysis
A mathematical model for the vacuum evaporation process was developed and validated to remove ammonia from anaerobically digested sludge under different pH and temperature conditions. Six combined process scenarios were tested using Anaerobic Digestion Model 1. The most effective options were vacuum evaporation as a post-treatment at pH 9 and as an intensification step at pH 9, both recovering over 76% of the influent nitrogen without reducing methane production. Economic analysis showed that the pH-9 intensification scenario was cost-neutral, performing significantly better than the control scenario, which had a net present value of –22 million dollars.
Vacuum-evaporation-coupled-with-anaerobic-digestion-for-process-intensification-and-ammonia.pdf