Background The light/dark cycle is one of the most important factors affecting the microalgal growth and lipid accumulation. Biomass concentration and lipid productivity could be enhanced by optimization of light/dark cycles, and this is considered an effective control strategy for microalgal cultivation. Currently, most research on effects of light/dark cycles on algae is carried out under aut...

The major role in global net CO2 fixation plays photosynthesis of green plants, algae and cyanobacteria, but other microorganisms are also important concerning autotrophy; i.e. autotrophic microorganisms can be found in most bacterial groups (Eubacteria) and there are even numerous representatives within the Archaea. CO2 fixation is not only one of the world’s most important biogeochemical proc...

This study investigated the performance and microbiome of cyclic denitrification filters (CDFs) for wood sulfur heterotrophic-autotrophic (WSHAD) saline wastewater. Wood-sulfur CDFs integrated into two pilot-scale marine recirculating aquaculture systems achieved high rates (103 ± 8.5 g N/(m3·d)). The combined use pine resulted in lower SO42? accumulation compared with prior wastewater studies ...

During the last decade, Clostridium difficile infection showed a dramatic increase in incidence and virulence in the Northern hemisphere. This incessantly challenging disease is the leading cause of antibiotic-associated and nosocomial infectious diarrhea and became life-threatening especially among elderly people. It is generally assumed that all human bacterial pathogens are heterotrophic org...

Replacing conventional by biodegradable plastics is claimed to be beneficial for the environment, especially when the drastic negative consequences of litter are considered. Such plastics are called biobased if the basic chemicals derive from organisms, preferably from autotrophic organisms, such as higher plants, algae or cyanobacteria.1 Established biotechnological processes convert carbohydr...

As part of a study on the assimilation of organic compounds by autotrophic microorganisms, enrichment cultures were set up for thiobacilli. A facultatively autotrophic Thiobacillus was isolated in pure culture and grew heterotrophically on many organic compounds including p-hydroxybenzoate (PHBz). Since degradation of aromatic compounds is carried out by a limited range of bacterial genera, the...