Author/Editor     Bulc, Tjašan G; Ojstršek, Alenka
Title     The use of constructed wetland for dye-rich textile wastewater treatment
Type     članek
Source     J Hazard Mater
Vol. and No.     Letnik 155, št. 1-2
Publication year     2008
Volume     str. 76-82
Language     eng
Abstract     The objective of the present paper was to examine the treatment efficiency of constructed wetlands (CW) for the dye-rich textile wastewaterwith special focus on colour reduction. Preliminary, a series of dynamic experiments was performed in the CW model packed with gravel, sand,and zeolitic tuff on three synthetically prepared wastewaters using chemically differ dyestuffs, auxiliaries and chemicals, in order to investigate the potential of low-cost materials as media for textile dye-bath wastewater treatment. The obtained results evidence that applied CW model reducescolour by up to 70%, and COD and TOC by up to 45%. Based on these results, the pilot CW with vertical (VF) and horizontal flow (HF) wasconstructed near textile factory mainly for cotton and cotton/PES processing with intention to treat real textile wastewater in situ. It was designedfor 1m3/day, covering 80m2, packed with sand and gravel, and planted with Phragmites australis. The average treatment efficiency of the CW for the selected pollution parameters were: COD 84%, BOD5 66%, TOC 89%, Ntotal 52%, Norganic 87%, NH4-N -331%, sulphate 88%, anionsurfactant 80%, total suspended solids (TSS) 93%, and colour 90%, respectively. The results unequivocally proved that the CW could offer anoptimal solution to meet the environmental legislation as well as requirements for effective and inexpensive textile wastewater treatment.
Descriptors     WATER POLLUTANTS, CHEMICAL
DYES
TEXTILE INDUSTRY
WATER PURIFICATION
PLANTS