TY - CHAP U1 - Konferenzveröffentlichung A1 - Rosenberger, Sandra A1 - Gienau, Tobias T1 - Optimised Nutrient Recovery from Biogas Digestate by Solid/Liquid Separation and Membrane Treatment T2 - Proceedings 3rd IWA Resource Recovery Conference N2 - Anaerobic digestion products of agricultural biogas plants are characterised by high nitrogen, phosphorus, and potassium content. In three scale-up steps, a membrane based digestate treatment process of solid-liquid-separation, ultrafiltration, and reverse osmosis for nutrient recovery was investigated. Lab-scale trials delivered a very good understanding of fluid properties and subsequent ultrafiltration performance, which is the limiting process step in terms of energy demand and operation costs. In semi-technical experiments, optimisation, and design parameters were developed, which were subsequently applied to pilot-scale tests at two full-scale biogas plants. The process optimisation resulted in 50 % energy reduction of the ultrafiltration step. About 36 % of the sludge volume was recovered as dischargeable water, 20 % as solid N/P-fertiliser, and 44 % as liquid N/K-fertiliser. Y1 - 2019 U6 - https://nbn-resolving.org/urn:nbn:de:bsz:959-opus-14504 UN - https://nbn-resolving.org/urn:nbn:de:bsz:959-opus-14504 N1 - 3rd IWA Resource Recovery Conference, Venice, Italy, 08.-12.09.2019 PB - International Water Association ER -