Now showing items 21-29 of 29

    Factors affecting the distribution, abundance and diversity of uncultured archaeal groups in freshwater sediments 

    Compte Port, Sergi (Date of defense: 2018-07-03)

    Archaea are abundant in extreme environments but they are also a prevalent component of microbial communities in soils, marine or freshwater plankton and sediments. Many studies highlighted the prominent role of marine ...

    Greenhouse gas emissions from wastewater treatment processes: identifying triggering factors at laboratory and full-scale systems 

    Ribera Guàrdia, Anna (Date of defense: 2017-12-12)

    This thesis focuses on the study of the global green house gas (GHG) emissions from wastewater systems. Nitrous oxide (N2O) and methane (CH4) are the main GHG directly emitted from wastewater treatment plants (WWTP). In ...

    Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network 

    Casas Ruiz, Joan Pere (Date of defense: 2017-05-31)

    In river networks, dissolved organic matter (DOM) constitutes the major pool of organic carbon, and plays a key role as energy source and modulator of toxic substances availability. In this thesis, Joan P. Casas-Ruiz and ...

    Analysis of chemotherapy drugs and related compounds in aquatic environment: removal, transformation and risk evaluation in eco-friendly and advanced technologies 

    Ferrando Climent, Laura (Date of defense: 2016-11-28)

    In order to evaluate the increasing environmental and human risk of anticancer drugs in the environment, more information needs to be gathered about their presence, their toxicity, bioaccumulation and persistence. In ...

    Sulfide and methane production in anaerobic sewer pipes: from microbial community characterization to effective mitigation strategies 

    Auguet Horta, Olga (Date of defense: 2016-07-13)

    Sewer systems transport wastewater from its source to treatment plants. During this transport, wastewater microorganisms colonize pipe walls and develop biofilms. The activity of microbial communities generates sulfide ...

    Towards better management of combined sewer systems. A methodology based on low-cost monitoring 

    Montserrat Royuela, Albert (Date of defense: 2015-07-03)

    In combined sewer systems (CSS) wastewater and stormwater flow through the same pipes. During severe rain episodes, the excess combined flow of untreated wastewater and stormwater is released out from the system through ...

    Fugitive green-house gas emissions during biological wastewater treatment: investigating sources and mitigation strategies in laboratory and full-scale systems 

    Rodríguez-Caballero, Adrián (Date of defense: 2015-03-20)

    The exponential increase of the atmospheric concentration of green-house gases due to human activities is responsible for the acceleration of global warming and climate change. Recently, scientific studies have pointed ...

    Effects of land uses and climate variability on the water quality of Mediterranean rivers: towards a regional vision of global change 

    Aguilera Becker, Rosana (Date of defense: 2015-03-10)

    This work investigated the effect of global change phenomena, particularly land use and climatic changes, on water quality patterns in Mediterranean rivers. A hybrid process-based and statistical model (SPARROW) was applied ...

    Stream biofilm responses to flow intermittency 

    Timoner Amer, Xisca (Date of defense: 2014-05-05)

    Streams experiencing a recurrent non-flow phase (i.e., flow intermittency) are characteristic of world regions with arid and semi-arid climates, where Mediterranean regions are part of. During non-flow streambed sediments, ...