Number of found documents: 39
Published from to

Microfltration nanofibrous membrane for wastewater treatment
Lev, J.; Holba, Marek; Došek, M.; Kalhotka, L.; Detvanová, L.; Dostálová, L.; Přichystalová, J.; Vincent, I.; Kimmer, D.
2015 - English
Pilot testing of nanofiber membrane module demonstrated long-term stability of the filtration process in activated sludge and showed the applicability in real-world conditions at the wastewater treatment plant. Microbial contamination of samples of the filtrate reached log removal 2 CFU/mL. Filtration in combination with UV irradiation resulted in a reduction of microbial contamination under required legislative standards. These results supported our assumptions to use nanofibre membranes in membrane bioreactor. Regeneration, optimization and antifouling surface treatment will be another step to increase the competitiveness of nanofiber membranes for water treatment. Keywords: electrospun nanofibers; wastewater filtration; membrane bioreactor Available at various institutes of the ASCR
Microfltration nanofibrous membrane for wastewater treatment

Pilot testing of nanofiber membrane module demonstrated long-term stability of the filtration process in activated sludge and showed the applicability in real-world conditions at the wastewater ...

Lev, J.; Holba, Marek; Došek, M.; Kalhotka, L.; Detvanová, L.; Dostálová, L.; Přichystalová, J.; Vincent, I.; Kimmer, D.
Botanický ústav, 2015

Use of iron nanoparticles for post-treatment of metal finishing wastewater
Matysíková, J.; Sukopová, M.; Škvoran, O.; Holba, Marek
2015 - English
This study evaluated the efficiency of copper, nickel and zinc removal from industrial metal finishing wastewater using nZVI material in lab and pilot scale conditions. Initial concentrations of Cu, Ni and Zn in raw wastewater were 3.16 mg/L, 0.38 mg/L and 0.56 mg/L, respectively. All metals were presented in residual concentrations and difficult to remove. Copper concentration was lowered by 77.2% in lab scale and 85.2% in pilot scale test for nZVI dose of 400 mg/L after 3 hours of reaction. Removal efficiency of nickel was 51% in the lab scale and 85.2 % at the pilot scale. Decrease of zinc concentration was less significant and reached 35.4% and 40% in lab and pilot scale experiment, respectively. Increase of efficiency in pilot scale testing was caused by the application of nZVI under inert atmosphere which ensured the preservation of high iron reactivity. pH adjustment before the nZVI dosing had also significant influence for efficiency of reaction. No changes and fluctuations of temperature and conductivity were observed. Pilot-scale test with lower dose of nZVI was performed to reveal the surpluses of previous dose of iron. The dose of 300 mg nZVI/L was applied into the reactor under inert atmosphere with pH adjustment before iron dosing. Efficiency of metals removal dropped to the 70% and 70.1% for copper and nickel. Efficiency of zinc removal increased to the 60.5%. nZVI dose of 300 mg/L was sufficient for reaching of limits for wastewater discharge. Keywords: zerovalent iron nanoparticles; metal finishing wastewater; copper and nickel removal Available at various institutes of the ASCR
Use of iron nanoparticles for post-treatment of metal finishing wastewater

This study evaluated the efficiency of copper, nickel and zinc removal from industrial metal finishing wastewater using nZVI material in lab and pilot scale conditions. Initial concentrations of Cu, ...

Matysíková, J.; Sukopová, M.; Škvoran, O.; Holba, Marek
Botanický ústav, 2015

Orchids of Nepal: phytogeography and economic importance
Timsina, B.; Rokaya, Maan Bahadur; Kindlmann, P.; Münzbergová, Zuzana
2015 - English
In total, 118 orchid species (25%) are endemic to the Himalayan region and 21 species are endemic to Nepal. Krober’s percentage similarity showed that the EAFR and ICFR have the highest percentage similarity (87%) followed by the MFR and ICFR (62%). In total, 92 species were used for medicinal purposes and 6 as food plants in Nepal. We conclude that Nepal is rich in orchid flora and the highest percentage of orchids originates from the EAFR. Keywords: orchids; Nepal; economic importance Available at various institutes of the ASCR
Orchids of Nepal: phytogeography and economic importance

In total, 118 orchid species (25%) are endemic to the Himalayan region and 21 species are endemic to Nepal. Krober’s percentage similarity showed that the EAFR and ICFR have the highest percentage ...

Timsina, B.; Rokaya, Maan Bahadur; Kindlmann, P.; Münzbergová, Zuzana
Botanický ústav, 2015

Can Nanofibers Replace Current Microfiltration Materials?
Lev, J.; Holba, Marek; Došek, M.; Kalhotka, L.; Kimmer, D.
2013 - English
The electrospun nanofibrous material M247 can be used as antimicrobial filter. Laboratory tests show high removal value (up to 6 log10 CFU/mL) and similar filtration efficiency compared filter Pragopor 6, presently used for sterilization of liquids in laboratories. Semi-pilot test confirmed good mechanical endurance and high removal efficiency. Our study showed high removal value with non-functionalized nanofibrous material despite of other cited studies. These results confirm our expectations, that nanofibrous material can replace the current filtration materials for laboratory use. Keywords: electrospun nanofibres; wastewater filtration; bacteria Available at various institutes of the ASCR
Can Nanofibers Replace Current Microfiltration Materials?

The electrospun nanofibrous material M247 can be used as antimicrobial filter. Laboratory tests show high removal value (up to 6 log10 CFU/mL) and similar filtration efficiency compared filter ...

Lev, J.; Holba, Marek; Došek, M.; Kalhotka, L.; Kimmer, D.
Botanický ústav, 2013

Experimental Study on Bacteria Removal from Artificial and Real Wastewater by Nanofibrous Filters
Lev, J.; Holba, Marek; Kalhotka, L.; Mikula, Přemysl; Kimmer, D.
2013 - English
Unique properties of electrospun nanofibrous materials could be utilized in various environmental technologies, e.g. bacteria removal from water. Recent studies show various removal efficiencies of bacteria and particulated matter by nanofibrous filters. Our article presents results from filtration tests through polyurethane nanofibrous material on short-term scale with artificial wastewater and also results from tests with real wastewater. We determined E. coli abundances in artificial and real wastewaters and the amount of the other hygienically important bacteria in real wastewater samples only. The results show possibility of long-term full-scale application of those materials, however some material modifications are needed to be accomplished. Keywords: bacteria; nanofibres; removal; filtry Available at various institutes of the ASCR
Experimental Study on Bacteria Removal from Artificial and Real Wastewater by Nanofibrous Filters

Unique properties of electrospun nanofibrous materials could be utilized in various environmental technologies, e.g. bacteria removal from water. Recent studies show various removal efficiencies of ...

Lev, J.; Holba, Marek; Kalhotka, L.; Mikula, Přemysl; Kimmer, D.
Botanický ústav, 2013

Application of Iron Nanoparticles for Industrial Wastewater Treatment
Sukopová, M.; Matysíková, J.; Škvoran, O.; Holba, Marek
2013 - English
Our study evaluated copper and nickel removal from metal finishing industry by using of nZVI. Lab-scale tests were performed with processing wastewater. Concentration of metals in raw wastewater was 22.4 mg/L for copper and 1.3 mg/L for nickel. 99 % of copper was removed by nZVI dose 3 g/L in 73 hours, likewise the highest removal efficiency of nickel was up to 80 % for the same nZVI dose in 6 hours. The removal efficiency 80 % for nickel was sufficient. The reaction seems to be relatively fast, high removal efficiencies were observed after 30 minutes. Further time of exposure was beneficial only for copper removal, nickel concentration become stable after 2 hours. Reaction conditions were monitored only but no effect of pH, temperature or conductivity was investigated. The results showed possibility to remove heavy metals from industrial wastewater in environmentally friendly way. Further research with real wastewater is necessary to get more reliable results. Keywords: zerovalent iron nanoparticles; copper and nickel removal; industrial wastewater treatment Available at various institutes of the ASCR
Application of Iron Nanoparticles for Industrial Wastewater Treatment

Our study evaluated copper and nickel removal from metal finishing industry by using of nZVI. Lab-scale tests were performed with processing wastewater. Concentration of metals in raw wastewater was ...

Sukopová, M.; Matysíková, J.; Škvoran, O.; Holba, Marek
Botanický ústav, 2013

Bacteria deactivation and removal from Wastewater and polluted Air
Kimmer, D.; Vincent, I.; Dudák, J.; Bergerová, E.; Petras, D.; Lev, J.; Holba, Marek; Kalhotka, L.; Mikula, Přemysl; Kořínková, R.; Kubáč, L.
2013 - English
Procedures permitting to prepare homogeneous functionalized nanofibre structures based on polyurethanes modified by phthalocyanines (PCs) by employing a suitable combination of variables during the electrospinning process are presented. Compared are filtration and bacteria deactivation properties of nanostructures without PCs, modified in bulk and with PCs embedded into polyurethane chain by a covalent bond protecting the release of active organic compound during the filtration process. Finding that the functionalized nanofibre structures have an effect on bacterial growth was confirmed by microbiological, physico-chemical and molecular biological analyses, such as the inoculation in a nutrient agar culture medium, flow cytometry and real-time polymerase chain reaction. Keywords: bacteria; deactivation and removal; wastewater and polluted air; aerologie; kovalentní vazba Available at various institutes of the ASCR
Bacteria deactivation and removal from Wastewater and polluted Air

Procedures permitting to prepare homogeneous functionalized nanofibre structures based on polyurethanes modified by phthalocyanines (PCs) by employing a suitable combination of variables during the ...

Kimmer, D.; Vincent, I.; Dudák, J.; Bergerová, E.; Petras, D.; Lev, J.; Holba, Marek; Kalhotka, L.; Mikula, Přemysl; Kořínková, R.; Kubáč, L.
Botanický ústav, 2013

Phosphorus Removal from Wastewater via Environmentally Friendly Technologies
Holba, Marek; Škvoran, O.; Maršálková, Eliška; Maršálek, Blahoslav
2012 - English
Our research is recently focused on the phosphorus removal from wastewater treatment plant outlets. We chose two municipal wastewater treatment plants (with and without phosphorus removal) and tested zerovalent and hexavalent nanoiron for phosphorus removal. Ferrates showed promising results even for smaller dosages, whilst NZVI showed not satisfactorily results for full-scale application. Next work will include phosphorus fractionation and fate of different phosphorus fractions at the tertiary treatment. Increasing interest on xenobiotics, hormons, endocrine disruptors, heavy metals and PPCPs and their removal from the plant outlets will extend our testing in the future. Keywords: phosphorus; removal; nanotechnology; fosfor; zpracování Available at various institutes of the ASCR
Phosphorus Removal from Wastewater via Environmentally Friendly Technologies

Our research is recently focused on the phosphorus removal from wastewater treatment plant outlets. We chose two municipal wastewater treatment plants (with and without phosphorus removal) and tested ...

Holba, Marek; Škvoran, O.; Maršálková, Eliška; Maršálek, Blahoslav
Botanický ústav, 2012

Application of the Electrospun Nanofibers in Wastewater Treatment
Lev, J.; Holba, Marek; Kalhotka, L.; Szostková, M.; Kimmer, D.
2011 - English
Electrospun nanofiber filters were used for treated wastewater treatment plant outlets. The efficiency fot the pathogen removal was monitored towards Czech government directions about water reuse. Keywords: nanofibers; wastewater; treatment; zpracování Available at various institutes of the ASCR
Application of the Electrospun Nanofibers in Wastewater Treatment

Electrospun nanofiber filters were used for treated wastewater treatment plant outlets. The efficiency fot the pathogen removal was monitored towards Czech government directions about water reuse.

Lev, J.; Holba, Marek; Kalhotka, L.; Szostková, M.; Kimmer, D.
Botanický ústav, 2011

When mammoths were migrating through Moravia: Palaeovegetation of Weichselian
Jankovská, Vlasta
2010 - English
Reconstruction of palaeovegetation and landscape character for Last Glacial Period (Weichselian) on the basis of pollenanalytical research (Czech Republic, E Moravia). Keywords: Weichselian; palaeovegetation; Moravia; výzkum; republika Available at various institutes of the ASCR
When mammoths were migrating through Moravia: Palaeovegetation of Weichselian

Reconstruction of palaeovegetation and landscape character for Last Glacial Period (Weichselian) on the basis of pollenanalytical research (Czech Republic, E Moravia).

Jankovská, Vlasta
Botanický ústav, 2010

About project

NRGL provides central access to information on grey literature produced in the Czech Republic in the fields of science, research and education. You can find more information about grey literature and NRGL at service web

Send your suggestions and comments to nusl@techlib.cz

Provider

http://www.techlib.cz

Facebook

Other bases