| Title | Analysing performance of real textile wastewater bio-decolourization under different reaction environments |
| Abstract | The biological colour removal from textile wastewater is challenging because of the toxicity of dyes to
microorganisms, and the need to test the process on real streams in order to ensure the reliability of the
produced data. This present study has provided a comparative analysis of the bio-decolorization of a real
wastewater containing a mixture of azo dyes under different environments: single aerobic and anaerobic,
and sequential anaerobic-aerobic. Tests were performed in sequencing batch reactors operated at
different exchange ratios and colour loads in the range of 0.1e0.3 and 0.002e0.1 kgCOD m3 d1,
respectively. The work cycle lasted 24 h. With reference to the dominant wavelength, l ¼ 536 nm,
resulting from the influent characterization, a maximum limit value of ~30% was observed for the colour
removal in the aerobic system. Better performance has been achieved with the anaerobic (65% removal)
and the sequential anaerobic-aerobic system, which reached efficiencies of 70e80%, for the range of
applied colour loads. The sequential system exhibits the highest removal rate, which, for the highest
colour load, is equal, in terms of absorbance units to 0.043 AU d1 L1. These values are even higher than
the process rates obtained with more complex technologies, such as the granular sludge bioreactors. The
demonstrated high performance of the sequential process with a real wastewater is a relevant step
forward for promoting the application of the biological treatment (more sustainable than the generally
employed chemical physical ones) to remediate highly polluted dye streams. |
| Source | Journal of cleaner production 129, pp. 468–477 |
| Keywords | Textile industry wastewaterReal wastewaterReactive dyesBiological decolourizationSBR reactorSequential anaerobic-aerobic process |
| Journal | Journal of cleaner production |
| Editor | Butterworth-Heinemann,, Oxford, Regno Unito |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.jclepro.2016.04.028 |
| Authors | M. Concetta Tomei*, Jesica Soria Pascual, Domenica Mosca Angelucci |
| Text | 354819 2016 10.1016/j.jclepro.2016.04.028 Scopus 2 s2.0 84973450847 ISI Web of Science WOS WOS 000378183900043 Textile industry wastewater Real wastewater Reactive dyes Biological decolourization SBR reactor Sequential anaerobic aerobic process Analysing performance of real textile wastewater bio decolourization under different reaction environments M. Concetta Tomei , Jesica Soria Pascual, Domenica Mosca Angelucci Water Research Institute, C.N.R., Via Salaria km 29.300, CP 10, 00015, Monterotondo Stazione, Rome, Italy The biological colour removal from textile wastewater is challenging because of the toxicity of dyes to microorganisms, and the need to test the process on real streams in order to ensure the reliability of the produced data. This present study has provided a comparative analysis of the bio decolorization of a real wastewater containing a mixture of azo dyes under different environments single aerobic and anaerobic, and sequential anaerobic aerobic. Tests were performed in sequencing batch reactors operated at different exchange ratios and colour loads in the range of 0.1e0.3 and 0.002e0.1 kgCOD m3 d1, respectively. The work cycle lasted 24 h. With reference to the dominant wavelength, l ¼ 536 nm, resulting from the influent characterization, a maximum limit value of 30% was observed for the colour removal in the aerobic system. Better performance has been achieved with the anaerobic 65% removal and the sequential anaerobic aerobic system, which reached efficiencies of 70e80%, for the range of applied colour loads. The sequential system exhibits the highest removal rate, which, for the highest colour load, is equal, in terms of absorbance units to 0.043 AU d1 L1. These values are even higher than the process rates obtained with more complex technologies, such as the granular sludge bioreactors. The demonstrated high performance of the sequential process with a real wastewater is a relevant step forward for promoting the application of the biological treatment more sustainable than the generally employed chemical physical ones to remediate highly polluted dye streams. 129 Published version https //biblioproxy.cnr.it 2114/science/article/pii/S0959652616302888 via%3Dihub Analysing performance of real textile wastewater bio decolourization under different reaction environments Pdf dell articolo Analysing performance of real textile wastewater bio decolourization under different reaction environments JCP2016_Analysing performance of real textile wastewater bio decolourization under different reaction environments.pdf Articolo in rivista Butterworth Heinemann, 0959 6526 Journal of cleaner production Journal of cleaner production J. clean. prod. Journal of cleaner production. domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA |
