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Technology to increase hydraulic conductivity of constructed wetlands
Pobořil, Jan ; Hynánková,, Eva (referee) ; Kriška-Dunajský, Michal (advisor)
Constructed wetlands are one of alternative solution wastewater treatment. Compared to conventional wastewater plants have many advantages. For example it´s technology saving construction, low operating costs, cleavability diluted wastewater and little or no need for electrical power. There are many publications dealing with Natural Ways wastewater treatment or even constructed wetlands. I decided to look for a thesis on one of the key processes – clogging bed media. The thesis is focused on ways to prevent clogging of bed media, mitigate the consequences and technology to increase hydraulic conductivity of constructed wetlands. The main test method is improving drainage parameters using pulsed filling and emptying of the bed media. This method is a very effective way to achieve quality requirements for effluent water from the treatment plant. Another test method is based on the injection of air into the media bed and sludge extraction using a specially modified industrial vacuum cleaner or pump.
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Technology to increase hydraulic conductivity of constructed wetlands
Pobořil, Jan ; Hynánková,, Eva (referee) ; Kriška-Dunajský, Michal (advisor)
Constructed wetlands are one of alternative solution wastewater treatment. Compared to conventional wastewater plants have many advantages. For example it´s technology saving construction, low operating costs, cleavability diluted wastewater and little or no need for electrical power. There are many publications dealing with Natural Ways wastewater treatment or even constructed wetlands. I decided to look for a thesis on one of the key processes – clogging bed media. The thesis is focused on ways to prevent clogging of bed media, mitigate the consequences and technology to increase hydraulic conductivity of constructed wetlands. The main test method is improving drainage parameters using pulsed filling and emptying of the bed media. This method is a very effective way to achieve quality requirements for effluent water from the treatment plant. Another test method is based on the injection of air into the media bed and sludge extraction using a specially modified industrial vacuum cleaner or pump.
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Accumulation of selected risk elements in plants growing in constructed wetlands for wastewater treatment.
VANČUROVÁ, Ivana
The aim of this bachelor work is to provide a literature survey aimed at the accummulation of risk elements by plants growing in constructed wetlands. The results of the survey revealed that less than 2% of the inflowing amount of risk element sis sequestered in the aboveground reed biomass. The highest concentrations were measured in roots while relatively low concentrations were found in rhizomes and aboveground biomass. Concentrations in Phragmites roots were usually higher than those in Schoenoplectus. The accumulation of risk elements was the highest during winter for Phragmites and in autumn for Schoenoplectus. Both plant species were found to be root accumulators of Pb, Cu, Mn, Ni, Zn and Cd.
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