588,340 Works

Kapazitätserweiterung von Kläranlagen

Jörg Krampe & Karl Svardal

Development of a New Method for Investigation of the Ash Melting Behavior in the Fluidized Bed Conversion Processes

Juraj Priscak, M. Kuba & Hermann Hofbauer
The suitability of woody biomass for thermochemical conversion process using fluidized bed technology has already been successfully demonstrated in the last decades. However in lower-rank biomass (e.g. crops and agriculture residues), the ash-forming matter differs from the one in the woody biomass and can cause operational problems such as agglomeration, sintering, fouling, or eventually total defluidization of the fluidized bed. These problems are common for both – combustion and gasifying reactors. Hence the understanding of...

Steam gasification of sewage sludge for synthesis processes

Johannes Schmid, Alexander Bartik, Florian Benedikt, Anna Magdalena Mauerhofer, Johannes Fuchs, E. Schanz, S. Reisinger, B. Nowak, F. Bühler, M. Österreicher, A. Lunzer, C. Walcher, Stefan Müller, M. Fuchs & Hermann Hofbauer
The paper presents measurement results of a gasification test run. Municipal sewage sludge from a digestion tower is gasified in an advanced dual fluidized bed reactor system. Steam is used as gasification agent and an olivine-limestone mixture as bed material. The fuel analysis shows a very high ash content and a low heating value of the dried sewage sludge. In addition, a significant amount of nitrogen in the fuel is present, leading to a high...

Experimental test in a lab-scale fluidized bed reactor to investigate agglomeration behavior under real conditions

Sebastian Diem, Stefan Müller, F. Benedikt & Hermann Hofbauer
This paper presents first results of experimental test runs in a lab-scale fluidized bed reactor at TU Wien to predict the agglomeration temperature of exhausted olive pomace. The controlled fluidized bed agglomeration test indicates an agglomeration temperature of approximate 945 °C by the occurrence of a pressure drop in the fluidized bed. The agglomeration phenomena is explained by the mechanism of initial low melting layer formation around burning char particles. The goal is to establish...

Spectroscopic in situ methods for the evaluation of the active centers on ash-layered bed materials from gasification in a fluidized bed reactor

D. Chlebda, Kouessan Aziaba, D. Janisch, M. Kuba, Hermann Hofbauer & J. Lojewska

From wood to biogas – a small-scale demonstration

N.B.K. Rasmussen & C.L. Høffner

Thermochemical equilibrium study of ash transformation during combustion and gasification of sewage sludge mixtures with agricultural residues with focus on the phosphorus speciation

Thomas Karl Hannl, Hamid Sefidari, Matthias Kuba & Marcus Öhman
The necessity of recycling anthropogenically used phosphorus due to depleting quantities of available phosphate ores encouraged recent research to identify potential alternative resource pools. One of these resource pools is the ash derived from the thermochemical conversion of sewage sludge. This ash is rich in phosphorus, although most of it is chemically associated in a way where it is not plant available. The purpose of this work was to identify the P-recovery potential of ashes...

Developing an adsorption-based gas cleaning system for a dual fluidized bed gasification process

Jürgen Loipersböck, G. Weber, R. Rauch & Hermann Hofbauer
Biomass can make a major contribution to a renewable future economy. If biomass is gasified a wide variety of products (e.g.: bulk chemicals, hydrogen, methane, alcohols, diesel) can be produced. In each of these processes gas cleaning is a crucial factor. Impurities in the gas can cause catalyst poisoning, pipe plugging, unstable or poisoned end products or harm the environment. Especially aromatic compounds (e.g.: benzene, naphthalene, pyrene) have a huge impact regarding a stable operation...

Dynamic Methanation of By-product Gases from Integrated Steelworks

P. Wolf-Zoellner, A.R. Medved, A. Krammer, K. Salbrechter & M. Lehner

Concept for the ideal 16MWth biomass gasification system to feed a synthetic natural gas production process

C. Walcher, Stefan Müller, Hermann Hofbauer & M. Fuchs
Biological, synthetic natural gas (SNG) prepared to fulfill the necessary grid feeding guidelines has the potential to keep up with the rising energy demands. Common production technologies for the extraction of natural gas from fossil sources cause relevant carbon dioxide (CO2) emissions. Biological, synthetic natural gas from renewable energy sources is discussed as an alternative option to replace the traditional extraction process and can therefore be part of a low carbon energy system. This paper...

Optimization of industrial Bio-SNG production from low-grade fuels

M. Veress, Alexander Bartik, Florian Benedikt, Stefan Müller & Hermann Hofbauer

From Correctness to High Quality

Orna Kupferman

Effective System Level Liveness Verification

Alexander Fedotov, Jeroen J.A. Keiren & Julien Schmaltz

Anytime Algorithms for MaxSAT and Beyond

Alexander Nadel

EUFicient Reachability for Software with Arrays

Denis Bueno, Arlen Cox & Karem Sakallah

Thread-modular Counter Abstraction for Parameterized Program Safety

Thomas Pani, Georg Weissenbacher & Florian Zuleger

Learning Properties in LTL ∩ ACTL from Positive Examples Only

Rüdiger Ehlers, Ivan Gavran & Daniel Neider

Selecting Stable Safe Configurations for Systems Modelled by Neural Networks with ReLU Activation

Franz Brauße, Zurab Khasidashvili & Konstantin Korovin

Ternary Propagation-Based Local Search for More Bit-Precise Reasoning

Aina Niemetz & Mathias Preiner

Abschätzung und Berücksichtigung der zukünftigen Schmutzfrachten aus dem Zentralen Speicherkanal der Stadt Graz bei der Erweiterung der Kläranlage Graz

Günter Gruber, Thomas Hofer, Stefan Messerschmied & Kajetan Beutle
Durch den Zentralen Speicherkanal (ZSK)ist es in Graz zukünftig möglich, die Entlastungsfrachten von 21 der insgesamt 35 Mischwasserüberläufe entlang der Mur temporär zuspeichern und nach den Regenereignissen einer ordnungsgemäßenReinigung auf der Kläranlage Graz zuzuführen. Durch ein im Kläranlagen-Zulauf installiertes Online-Monitoring-System ist es möglich, die dabei auftretendeStofffrachtdynamik getrennt für Trockenwetter-und für Regen-wetterbedingungen messtechnisch mit hoher zeitlicherAuflösung zu erfassen. Darauf basierend ist es auch möglich, die Entleerungsfrachten des im ZSK zwischengespeicherten Volumens zur Kläranlage Graz abzuschätzen und...

Portfolio SAT and SMT Solving of Cardinality Constraints in Sensor Network Optimization

Gergely Kovasznai, Krisztián Gajdár & Laura Kovacs
Wireless Sensor Networks (WSNs) serve as the basis for Internet of Things applications. A WSN consists of a number of spatially distributed sensor nodes, which cooperatively monitor physical or environmental conditions. In order to ensure the dependability of WSN functionalities, several reliability and security requirements have to be fulfilled. In previous work, we applied OMT (Optimization Modulo Theories) solvers to maximize a WSN’s lifetime, i.e., to generate an optimal sleep/wake-up scheduling for the sensor nodes....

Behandlung und Beseitigung von kommunalen und industriellen Schlämmen - Situation in der Bundesrepublik Deutschland

Werner Schenkel
Vorträge des 15. ÖWWV - Seminars RAACH, 28.1. - 1.2.1980

Behandlung und Beseitigung von kommunalen und industriellen Schlämmen - Situation in der Schweiz

Bruno Milani
Vorträge des 15. ÖWWV - Seminars RAACH, 28.1. - 1.2.1980

Revised protocol. Optimized transformation, overexpression and purification of S100A10

, , Samuel Tremblay, Line Cantin, Gary S. Shaw & Elodie Boisselier
PROTOCOL FOR: Optimized transformation, overexpression and purification of S100A10

Supplementary protocol: Simple workflow for genome and methylation analyses of ejaculated bovine spermatozoa with low sperm input

Bradford W. Daigneault, Sandeep K. Rajput & George W. Smith
PROTOCOL FOR: Simple workflow for genome and methylation analyses of ejaculated bovine spermatozoa with low sperm input.

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