Treatment of textile waste effluents by ozonation and chemical coagulation

Lin, Sheng H.; Lin, Chih‐Min

doi:10.1016/0043-1354(93)90112-u

Cited by 306 publications

(102 citation statements)

References 3 publications

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“…The common dyeing processes at a textile plant vary with the substrate to be ®nished and with the consumers demand (Lin and Lin, 1993). Results given in the Tables 3 and 4 demonstrate how the quality of process e uents varies with the typical processes and chemicals used.…”

Section: Resultsmentioning

confidence: 99%

“…The increased use of cotton has additionally led to substantial growth in the usage of reactive dyes. Consequently, the most pressing environmental problem facing the textile industry is related Chemosphere 46 (2002) 339±344 www.elsevier.com/locate/chemosphere to reactive dyes (Lin and Lin, 1993;Zissi and Lyberatos, 1996;Beydilli et al, 1998). In general, dyestu s with low biodegradability pass through the wastewater treatment plant and are released into the environment because of their high solubility in water.…”

Section: Introductionmentioning

confidence: 99%

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Toxicity evaluation of reactive dyestuffs, auxiliaries and selected effluents in textile finishing industry to luminescent bacteria Vibrio fischeri

et al. 2002

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The toxicity of 17 selected process e uents, 11 reactive dyestu s and 8 auxiliaries from a textile dyeing and ®nishing mill in Ayazaga, Istanbul, Turkey was evaluated by bioluminescence test using bacteria Vibrio ®scheri in LUMIStox 300. The EC 20 and EC 50 for auxiliaries, the EC 20 for dyestu s were determined. For selected process e uents GLvalues, the dilution level at which a wastewater sample causes less than 20% inhibition, were examined. Our results demonstrate that the toxicity assessment with luminescent bacteria is e ective and of practical use for chemicals applied in textile ®nishing industry with the limitation of the deep dark-colored dye bath samples and for the related e uents. Inhibition e ects of numerous dyestu s as well as auxiliaries to luminescent bacteria di ered considerably with a range 5±600 mg l À1 for EC 20 and 9±6930 mg l À1 for EC 50 , respectively. Among 17 e uents, 1 sample exhibited high toxicity (GL 100), 7 showed moderate toxicity (GL 12±32), and 9 had a GL-value <10 indicating a low or no toxicity. Ó

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toxicity evaluation of reactive dyestuffs, auxiliaries and selected effluents in textile finishing industry to luminescent bacteria Vibrio fischeri

et al. 2002

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“…These small molecules contribute considerably to the COD that cannot be completely removed by the ozonation reaction. However, they are easily digested by the activated sludge processes (Lin and Lin, 1993). As indicated by Singer (1990) even in the presence of excess ozone, the reaction does not result in the complete mineralization of organic carbon to carbon dioxide.…”

Section: Chemical Oxidationmentioning

confidence: 99%

Ozonation of an azo dye C.I. Remazol Black 5 and toxicological assessment of its oxidation products

et al. 2003

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The effect of ozonation (20.5 mg l À1 ) on the degradation processes of an azo dye, Remazol Black 5 (RB5; CI) was studied. Conventional parameters such as chemical oxygen demand (COD), total organic carbon (TOC), pH, conductivity, colour removal, biodegradability (BOD 5=28 ), and toxic potential of the dye and its degradation products were monitored during the process. The results obtained indicated that ozonation is a highly effective way to remove the colour of a corresponding dye solution. However, a considerable organic load still remained as indicated by high COD and TOC residues. The COD, TOC reductions were about 40% and 25% for 6 h ozonation of 2 g l À1 RB5 aqueous solution. During the ozonation process the rapid decrease of pH and the sharp increase of conductivity indicated the formation of acidic by-products and small fragments and ions which were identified by high performance ion chromatography. The BOD 28 data revealed that first by-products after partial ozonation (10-150 min) of RB5 were more biodegradable than the parent compound and ozonation can enhance the biodegradability of azo dyes. During the first 150 min of total 360 min of oxidation, the formation of first by-products with high toxic potential took place as it could be confirmed by two acute toxicity-screening tests, the bioluminescence test (Vibrio fischerii) and the neutral red cytotoxicity assay (rat hepatoma cells). The significant enhancement of microbial biodegradability after long-term ozonation could also be seen as a decrease of toxic intermediates in correlation with the ozonation time as indicated in BOD 28 biological degradation test results.

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“…The greater part of dyes, which can be toxic or mutagenic, in dyeing wastewater is poorly removed by the conventional wastewater treatment system (Lin and Lin 1993;Frijters et al 2006). Different types of technologies have been developed to remove these refractory compounds.…”

Section: Introductionmentioning

confidence: 99%

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

Bae

Han

Kim

et al. 2016

Int. J. Environ. Sci. Technol.

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The upflow anaerobic sludge blanket process followed by the biological aerated filter process was employed to improve the removal of color and recalcitrant compounds from real dyeing wastewater. The highest removal efficiency for color was observed in the anaerobic process, at 8-h hydraulic retention time, seeded with the sludge granule. In the subsequent aerobic process packed with the microbe-immobilized polyethylene glycol media, the removal efficiency for chemical oxygen demand increased significantly to 75 %, regardless of the empty bed contact time. The average influent non-biodegradable soluble chemical oxygen demand was 517 mg/L, and the average concentration in effluent from the anaerobic reactor was 363 mg/L, suggesting the removal of some recalcitrant matters together with the degradable ones. The average nonbiodegradable soluble chemical oxygen demand in effluent from the aerobic reactor was 87, 93, and 118 mg/L, with the removal efficiency of 76, 74, and 67 %, at 24-, 12-, and 8-h empty bed contact time, respectively. The combined anaerobic sludge blanket and aerobic cell-entrapped process was effective to remove the refractory compounds from real dyeing wastewater as well as in reducing organic loading to meet the effluent discharge limits. This integrated process is considered an effective and economical treatment technology for dyeing wastewater.

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Treatment of textile waste effluents by ozonation and chemical coagulation

Cited by 306 publications

References 3 publications

Toxicity evaluation of reactive dyestuffs, auxiliaries and selected effluents in textile finishing industry to luminescent bacteria Vibrio fischeri

Toxicity evaluation of reactive dyestuffs, auxiliaries and selected effluents in textile finishing industry to luminescent bacteria Vibrio fischeri

Ozonation of an azo dye C.I. Remazol Black 5 and toxicological assessment of its oxidation products

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

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