Search results for "gestion"
showing 10 items of 2604 documents
Impact of crop species on bacterial community structure during anaerobic co-digestion of crops and cow manure
2008
The bacterial communities in three continuously stirred tank reactors co-digesting cow manure with grass silage, oat straw, and sugar beet tops, respectively, were investigated by 16S rRNA gene-based fingerprints and clone libraries. The analyses revealed both clearly distinct and similar phylotypes in the bacterial communities between the reactors. The major groups represented in the three reactors were Clostridia, unclassified Bacteria, and Bacteroidetes. Phylotypes affiliated with Bacilli or Deltaproteobacteria were unique to the sugar beet and straw reactor, respectively. Unclassified Bacteria dominated in sugar beet reactor while in the straw and grass reactor Clostridia was the domina…
Hydrolysis and microbial community analyses in two-stage anaerobic digestion of energy crops
2007
Aims: The roles of the diverse populations of micro-organisms responsible for biodegradation of organic matter to form methane and carbon dioxide are rudimentarily understood. To expand the knowledge on links between microbial communities and the rate limiting, hydrolytic stage of two-stage biogas production from energy crops, this study was performed. Methods and Results: The process performance. and microbial communities (as determined by fluorescence in situ hybridization) in two separate two-stage batch digestions of sugar beets and grass/clover were studied. The microbial populations developed in the hydrolytic stage of anaerobic digestion of beets and grass/clover showed very few simi…
Two-Stage Anaerobic Digestion of Energy Crops: Methane Production, Nitrogen Mineralisation and Heavy Metal Mobilisation
2006
Energy crops (willow, sugar beet and grass silage) were digested in pilot scale two-stage anaerobic digesters. The specific methane yields obtained were 0.16, 0.38 and 0.39 m3 kg(-1) added volatile solids (VSadded) for willow, sugar beet and grass, respectively, corresponding to yearly gross energy yields of 15, 53 and 26 megawatt-hours (MWh) per hectare. With grass and sugar beets as substrate, 84-85% of the harvestable methane was obtained within 30 days. In pilot scale two-stage digestion of willow and sugar beet, 56 and 85% of the laboratory scale methane yields were obtained, but digestion of grass in two-stage reactors yielded 5% more methane than digestion in laboratory scale complet…
Understanding language as a mediating tool in cross-boundary collaboration : The case of managers and actors working together to save a theater compa…
2018
Thème du congrès : « Surprise in and around Organizations: Journeys to the Unexpected », sub-thème 48 : More to Talk About: Unexpected Roles of Language in Organizing; International audience
Performance and decision-making process in China
2016
How do I rule my solver’s relationship? An empirical investigation of governance structures in crowdsourcing contests
2016
In order to continually innovate, companies are increasingly opening their boundaries and signing crowdsourcing agreements with solution providers. However, crowdsourcing scholars are no closer to understanding how possible solvers’ opportunistic behaviours affect the governance structure proposed by the seeker at the moment the challenge is broadcast. Building on the managerial-choice approach of transaction cost economics, we aim to examine how contract conditions, specified in the request for proposal (RFP), aiming to reduce the effect of solver’s opportunistic behaviours whilst influencing seekers’ preferences toward proposing contractual agreements to manage the working relationship wi…