Browsing by Author "Holba, Marek"
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- ItemInfluence of phosphorus precipitation on permeability and soluble microbial product concentration in a membrane bioreactor(Elsevier Sci Ltd, 2013) Gómez, Marcel P.; Dvořák, Lukáš; Růžičková, Iveta; Wanner, Jiří; Holba, Marek; Sýkorová, EvaMany articles have been published on coagulant dosing in membrane bioreactors, though few have been long-term studies examining the treatment of real wastewater. This study summarises the results of a membrane bioreactor pilot-plant (flat sheet membrane, nominal pore size 0.03 μm) that treated real municipal wastewater for two-years. Both influence of phosphorus precipitation by ferric sulphate on membrane permeability (flux decrease) and soluble microbial product concentration (especially on carbohydrates and proteins) were monitored. Flux decrease over work cycles lasting several months without phosphorus precipitation were compared to two periods with precipitation. X-ray elemental diffractometry of the filtration cake showed differences in the main contributors to inorganic fouling, with decreases in Ca and Si during operation with coagulant addition, and an increase in Fe. © 2012 Elsevier Ltd.
- ItemOperational experience with a seasonally operated full-scale membrane bioreactor plant(Elsevier Sci Ltd, 2012) Gómez, Marcel P.; Dvořák, Lukáš; Růžičková, Iveta; Holba, Marek; Wanner, JiříA seasonally operated full-scale membrane bioreactor plant (flat sheet, 0.03. μm) treating municipal wastewater from a recreation facility was monitored for 2. years. In particular, membrane bioreactor operation characteristics and development and changes in extracellular polymeric substances and soluble microbial product concentrations were observed, which were both dependent on volume and quality of incoming wastewater. Microbiological effluent quality, nutrient removal efficiency and activated sludge characteristics were analysed on a regular basis. Correlations between activated sludge quality, extracellular polymeric substance and soluble microbial product concentrations were identified. Pathogen related changes in effluent quality during plant operation were also observed. Nutrient removal efficiency was very good, despite fluctuations in influent flow. © 2012 Elsevier Ltd.