The interplay of hydrological, chemical and microbial processes in the formation of iron-rich floating films in aquatic environments at a circumneutral pH The direct contribution of microbial activity to the formation of iron-oxide minerals is difficult to prove in wetlands due to the high reactivity of solid iron phases with different compounds and the variety of redox processes that may occur...

In this study, a lab-scale fixed-film bio-media process was developed and operated to evaluate nitrogen removal from domestic sewage treatment plants. For removal, the applied in series with anaerobic, anoxic, aerobic units three separate reactors that were continuously at same loading rates hydraulic retention time. A biofilm separation bioreactor for on-site wastewater employed synthetic fibe...

the precipitation of calcium carbonate by bacteria isolated from submerged fixed-film bioreactorused for the treatment of urban wastewater in both natural and artificial media was studied. however, carbonate precipitation was detected only when the bacteria grow in media added with calcium. precipitation took place rapidly, and crystal formation began 3 d after inoculation and the percentage of...

Charged and uncharged soft interfaces are present in a variety of microfluidic and biological systems. The electrokinetic properties of these fixed-diffuse-charge systems are dependent on (1) the components of the working fluid, (2) the bounding surface of the diffuse charge layer, and (3) the chemical and mechanical properties of the film itself. Here, we describe recent and past literature to...

Both types of biomass, despite some similarities, show also many differences. Probably as a result of complex relations (competition, migration, physical factors like flow velocity and biochemical factors like oxygen supply) the flocs and attached biomass can demonstrate many differences, e.g. texture, active surface, heterotrophs and autotrophs ratio, and especially biomass age. A compilation ...