Inovation of constucted wetlands

The thesis deals with analysis of the purification processes in hybrid constructed wetland (CW), combined horizontal subsurface flow filter bed and vertical subsurface flow filter bed, in the first year operating. Original CW, consisted of one horizontal subsurface filter bed, was built in 1994 at Kotenčice, Central Bohemia, division Příbram. Despite of a relatively high efficiency of the CW, mechanical pretreatment didn't provide sufficient efficiency and the filtration beds suffered from severe clogging, therefore the whole system was rebuilt in 2011 - 2012. Reconstructed CW for 250 PE has been designed for treat sewage from a separate sewer system. A new type of hybrid constructed wetland consists of horizontal flow beds (911 m2 ) and vertical flow beds (300 m2 ), which are arranged in 4 parallel multi - stage fields. Pulse feeding has been tested in vertical flow filter beds and filtration material with high adsorption capacity has been tested as an alternative material. The filters are planted with Phragmites australis, Phalaris Arundinacea, Iris pseudacorus, Iris sibirica, Glyceria maxima and Lythrum salicaria. Purified water is drained to current recipient - Kotenčice stream. In the sampling period (2. 10. 2012 - 17. 12. 2013) physical - chemical parameters COD, BOD5, suspended solids, total..