Abstract：
:The textile industry demands huge volumes of high quality water which converts into wastewater contaminated by wide spectrum of chemicals. Estimation of textile wastewater influence on the aquatic systems is a very important issue. Therefore, closing of the water cycle within the factories is a promising method of decreasing its environmental impact as well as operational costs. Taking both reasons into account, the aim of this work was to establish the acute toxicity of the textile wastewater before and after separate chemical, biological as well as combined chemical-biological treatment. For the first time the effects of three different combinations of chemical and biological methods were investigated. The acute toxicity analysis were evaluated using the Microtox® toxicity test. Ozonation in two reactors of working volume 1 dm3 (stirred cell) and 20 dm3 (bubble column) were tested as chemical process, while biodegradation was conducted in two, different systems - Sequence Batch Reactors (SBR; working volume 1.5 dm3) and Horizontal Continuous Flow Bioreactor (HCFB; working volume 12 dm3). The untreated wastewater had the highest toxicity (EC50 value in range: 3-6%). Ozonation caused lower reduction of the toxicity than biodegradation. In the system with SBR the best results were obtained for the biodegradation followed by the ozonation and additional biodegradation - 96% of the toxicity removal. In the second system (with HCFB) two-stage treatment (biodegradation followed by the ozonation) led to the highest toxicity reduction (98%).
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Paździor K,Wrębiak J,Klepacz-Smółka A,Gmurek M,Bilińska L,Kos L,Sójka-Ledakowicz J,Ledakowicz Sdoi
10.1016/j.jenvman.2016.06.055subject
Has Abstractpub_date
2017-06-15 00:00:00pages
166-173issue
Pt 2eissn
0301-4797issn
1095-8630pii
S0301-4797(16)30420-0journal_volume
195pub_type
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