The investigations described are carried out to analyse the microbiological processes in relation to the GAC characteristics and the removal of natural organic matter (NOM) in Granular Activated Carbon filters (GACFs) in water treatment. The main goal of the study was to obtain a qualitative description of the interactions between microbial activit...
Met een microbiële elektrolysecel (MEC) kan waterstof worden gewonnen uit organische reststromen. Aan de bioanode van een MEC zetten elektrochemisch actieve bacteriën organisch materiaal om in stroom, welke vervolgens aan de kathode wordt omgezet in waterstof. Dit proces behoeft een aangelegd voltage van zo’n 0.4 tot 1.0 V. Dit proces combineert du...
Predicting the growth and behaviour of microorganisms in food has long been an aim in food microbiology research. In recent years, microbial models have evolved to become more exact and the discipline of quantitative microbial ecology has gained increasing importance for food safety management, particularly as minimal processing techniques have bec...
In dit project over zuur veroorzaakt door Fusarium in de tulpenteelt en handel komen drie aspecten aan de orde. De verpreiding van zuur vanuit plantgoed en vanuit de grond. De grote variatie in agressiviteit van Fusarium-isolaten uit tulp, zie rapport isolaten. En de bemonstering van pellijnen op bedrijven, zie rapport pellijnen. In dit onderzoek w...
A method for determining the concentration of active microbial biomass in granular activated carbon (GAC) filters used in water treatment was developed to facilitate studies on the interactions between adsorption processes and biological activity in such filters. High-energy sonication at a power input of 40 W was applied to GAC samples for the det...
This thesis describes a multifaceted approach to further enhance our view of the complex human intestinal microbial ecosystem. This approach combines me advantages of flow cyrometry (FCM), a single cell and high-throughput technology, and molecular techniques that have proven themselves to be invaluabIe tools in studying the microbial diversity and...
Nitrous oxide (N 2 O) is an important greenhouse gas. At present, it causes 6% of global warming. The atmospheric concentration of N 2 O continues to increase at a rate of 0.8 ppb per year. The main known sink of N 2 O is its destruction in the stratosphere to nitric oxide (NO). Via that destruction product, N 2 O contributes to the decomposition o...
Reduced inorganic sulfur species like elemental sulfur or sulfide are sensitive to changes in oxidative environments. Generally, inorganic reduced sulfur exists in natural environments in a solid phase, whereas its oxidation leads to sulfur solubilization and a production of acidity. This oxidation occurs spontaneously, due to chemical mechanisms, ...
