TY - JOUR A1 - Cheenakula, Dheeraja A1 - Griebel, Kai A1 - Montag, David A1 - Grömping, Markus ED - Huang, Xiaowu T1 - Concept development of a mainstream deammonification and comparison with conventional process in terms of energy, performance and economical construction perspectives JF - Frontiers in Microbiology N2 - Deammonification for nitrogen removal in municipal wastewater in temperate and cold climate zones is currently limited to the side stream of municipal wastewater treatment plants (MWWTP). This study developed a conceptual model of a mainstream deammonification plant, designed for 30,000 P.E., considering possible solutions corresponding to the challenging mainstream conditions in Germany. In addition, the energy-saving potential, nitrogen elimination performance and construction-related costs of mainstream deammonification were compared to a conventional plant model, having a single-stage activated sludge process with upstream denitrification. The results revealed that an additional treatment step by combining chemical precipitation and ultra-fine screening is advantageous prior the mainstream deammonification. Hereby chemical oxygen demand (COD) can be reduced by 80% so that the COD:N ratio can be reduced from 12 to 2.5. Laboratory experiments testing mainstream conditions of temperature (8–20°C), pH (6–9) and COD:N ratio (1–6) showed an achievable volumetric nitrogen removal rate (VNRR) of at least 50 gN/(m3∙d) for various deammonifying sludges from side stream deammonification systems in the state of North Rhine-Westphalia, Germany, where m3 denotes reactor volume. Assuming a retained Norganic content of 0.0035 kgNorg./(P.E.∙d) from the daily loads of N at carbon removal stage and a VNRR of 50 gN/(m3∙d) under mainstream conditions, a resident-specific reactor volume of 0.115 m3/(P.E.) is required for mainstream deammonification. This is in the same order of magnitude as the conventional activated sludge process, i.e., 0.173 m3/(P.E.) for an MWWTP of size class of 4. The conventional plant model yielded a total specific electricity demand of 35 kWh/(P.E.∙a) for the operation of the whole MWWTP and an energy recovery potential of 15.8 kWh/(P.E.∙a) through anaerobic digestion. In contrast, the developed mainstream deammonification model plant would require only a 21.5 kWh/(P.E.∙a) energy demand and result in 24 kWh/(P.E.∙a) energy recovery potential, enabling the mainstream deammonification model plant to be self-sufficient. The retrofitting costs for the implementation of mainstream deammonification in existing conventional MWWTPs are nearly negligible as the existing units like activated sludge reactors, aerators and monitoring technology are reusable. However, the mainstream deammonification must meet the performance requirement of VNRR of about 50 gN/(m3∙d) in this case. KW - anammox KW - energy efficiency KW - mainstream deammonification KW - nitrogen elimination KW - wastewater Y1 - 2023 U6 - https://doi.org/10.3389/fmicb.2023.1155235 SN - 1664-302X VL - 14 IS - 11155235 SP - 1 EP - 15 PB - Frontiers ER - TY - CHAP A1 - Melzner, Jürgen A1 - Ferger, Martin ED - Krause, Thomas ED - Ulke, Bernd ED - Ferger, Martin T1 - Building Information Modeling T2 - Zahlentafeln für den Baubetrieb N2 - Durch die Einführung von Building Information Modeling (BIM) sowohl projektspezifisch als auch in ganze Unternehmungen hat die Baubranche einen weitreichenden Veränderungsprozess angestoßen. Building Information Modeling kann als eine Methode angesehen werden, um die Informationsasymmetrien zwischen den Projektbeteiligten so gering wie möglich zu halten. Y1 - 2024 SN - 978-3-658-41329-3 (Print) SN - 978-3-658-41330-9 (eBook) U6 - https://doi.org/10.1007/978-3-658-41330-9_15 SP - 1051 EP - 1073 PB - Springer Vieweg CY - Wiesbaden ER - TY - RPRT A1 - Thoma, Andreas A1 - Laarmann, Lukas A1 - Merkens, Torsten A1 - Franzke, Till A1 - Möhren, Felix A1 - Buttermann, Lilly A1 - van der Weem, Dirk A1 - Fischer, Maximilian A1 - Misch, Philipp A1 - Böhme, Mirijam A1 - Röth, Thilo A1 - Hebel, Christoph A1 - Ritz, Thomas A1 - Franke, Marina A1 - Braun, Carsten T1 - Entwicklung eines intermodalen Mobilitätskonzeptes für die Pilotregion NRW/Rhein-Maas Euregio und Schaffung voller Kundenakzeptanz durch Transfer von Standards aus dem PKW-Bereich auf ein Flugtaxi : Schlussbericht : Projektakronym: SkyCab (Kategorie B) : Laufzeit in Monaten: 6 : Hauptthema: Kategorie B: Innovative Ideen mit Bezug zu UAS/Flugtaxis Y1 - 2020 N1 - Förderkennzeichen BMVI 45UAS1027A-F PB - FH Aachen CY - Aachen ER - TY - CHAP A1 - Kerpen, Nils B. A1 - Schoonees, Talia A1 - Schlurmann, Torsten A1 - Valero, Daniel A1 - Bung, Daniel Bernhard T1 - waveSTEPS – Wellenauf- und Wellenüberlauf an getreppten Deckwerken T2 - 24. KFKI-Seminar 2019, 21.11.2019 Y1 - 2019 ER - TY - CHAP A1 - Lopes, Pedro A1 - Bung, Daniel Bernhard A1 - Leandro, Jorge A1 - Carvalho, Rita F. T1 - The effect of cross-waves in physical stepped spillway models T2 - E-proceedings of the 36th IAHR World Congress ; 28 June - 3 July, 2015, The Hague, the Netherlands Y1 - 2015 SP - 1 EP - 9 ER - TY - JOUR A1 - Krause, Thomas T1 - Schalung und Gerüste JF - Beispiele für die Baubetriebspraxis / Hoffmann, Manfred ; Kuhlmann, Willy [Hrsg.]. Y1 - 2006 SN - 978-3-8351-0002-2 N1 - Kapitel 7 SP - 122 EP - 131 PB - Teubner CY - Wiesbaden ER - TY - JOUR A1 - Oertel, Mario A1 - Bung, Daniel Bernhard T1 - Stability and scour development of bed material on crossbar block ramps JF - International journal of sediment research N2 - Block ramps are ecologically oriented drop structures with adequate energy dissipation and partially moderate flow velocities. A special case is given with crossbar block ramps, where the upstream and downstream level difference is reduced by a series of basins. To prevent the total structure from failing, the stability of single boulders within the crossbars and the bed material in between must be guaranteed. The present paper addresses the stability of bed material and scour development for various flow regimes. Any bed material erosion may affect the stability of the crossbar boulders, which in turn can result in major damages of the ramp. Therefore new design approaches are developed to choose an appropriate bed material size and to avoid failures of crossbar block ramp structures. Y1 - 2015 U6 - https://doi.org/10.1016/j.ijsrc.2014.12.003 SN - 1001-6279 VL - 30 IS - 4 SP - 344 EP - 350 PB - Elsevier CY - Amsterdam ER - TY - BOOK A1 - Krause, Thomas A1 - Ulke, Bernd A1 - Ferger, Martin ED - Krause, Thomas ED - Ulke, Bernd ED - Ferger, Martin T1 - Zahlentafeln für den Baubetrieb Y1 - 2024 SN - 978-3-658-41329-3 (Print) SN - 978-3-658-41330-9 (eBook) U6 - https://doi.org/10.1007/978-3-658-41330-9 PB - Springer Vieweg CY - Wiesbaden ET - 10. Auflage ER - TY - CHAP A1 - Bung, Daniel Bernhard A1 - Valero, Daniel ED - Crookston, B. ED - Tullis, B. T1 - Application of the optical flow method to velocity determination in hydraulic structure models BT - Session 11: Fish passage and shiplocks T2 - Hydraulic Structures and Water System Management. 6th IAHR International Symposium on Hydraulic Structures, Portland, OR, 27-30 June 2016 Y1 - 2016 SN - 978-1-884575-75-4 U6 - https://doi.org/10.15142/T3150628160853 SP - 223 EP - 232 ER - TY - CHAP A1 - Krause, Thomas A1 - Kremer, Norbert T1 - Schalung und Gerüste T2 - Zahlentafeln für den Baubetrieb N2 - Systemschalungen und Systemgerüste haben den Baustellenbetrieb in vielen Bereichen sehr vereinfacht. Dennoch sind Kenntnisse in diesen Feldern für eine erfolgreiche und effektive Bauleitung unverzichtbar. In diesem Kapitel werden Hinweise und Empfehlungen für die Bemessung und Einsatz von Schalungen, Trag- und Arbeitsgerüsten für den Baustellenbetrieb gegeben. Y1 - 2016 SN - 978-3-658-02838-1 (Online) SN - 978-3-658-02837-4 (Print) U6 - https://doi.org/10.1007/978-3-658-02838-1_11 SP - 1247 EP - 1296 PB - Springer Vieweg CY - Wiesbaden ET - 9., überarb. und aktual. Aufl. ER -