Anaerobic Treatment of Real Textile Wastewater with a Fluidized Bed Reactor

San Diego State University, San Diego, California, United States
Water Research (Impact Factor: 5.53). 05/2003; 37(8):1868-78. DOI: 10.1016/S0043-1354(02)00577-8
Source: PubMed


Anaerobic treatability of a real cotton textile wastewater was investigated in a fluidized bed reactor (FBR) with pumice as the support material. The immobilized biomass or attached volatile solids level on the support material was 0.073 g VSS/g support material at the end of the 128-d start-up period. During the operation period, real cotton textile wastewater was fed to the anaerobic FBR both unsupplemented (in Stages 1 and 2) and supplemented (with synthetic municipal wastewater in Stage 3 and glucose in Stages 4-6). The effect of operational conditions such as organic loading rate (OLR), hydraulic retention time (HRT), influent glucose concentration as the co-substrate, etc. was investigated to achieve the maximum color removal efficiency in the reactor. Results indicated that anaerobic treatment of textile wastewater studied was possible with the supplementation of an external carbon source in the form of glucose (about 2g/l). The corresponding maximum COD, BOD(5) and color removals were found to be around 82%, 94% and 59%, respectively, for HRT of around 24h and OLR of 3 kg COD/m(3)/d. Further increase in external carbon source added to real textile wastewater did not improve the color removal efficiency of the anaerobic FBR reactor.

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Available from: Goksel Demirer, Mar 13, 2015
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    • "Total gas was measured by water displacement method and its content was measured by Gas Chromatography (GC)-Perkin Elmerduringthecharacterizationstudies. As expected, BOD values of fermantor I were higher than fermantor II (Fig 2)and that can be explained as the ozonation increases biodegradability of the wastewater[9],[10] "

    Full-text · Article · Feb 2016 · Fresenius Environmental Bulletin
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    • "In the end of the start-up period, in Anaerobic Fluidized Bed Reactor, attached volatile solid (AVS) concentration reached to 0.0185 gvss g −1 which is in accordance with ranges 0.074–0.11 reported byFarhan et al., 1997 [32], 0.039[33], 0.05[34], 0.0732[27]and 0.0375–0.429 gvss g −1 by[35]. "

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    • "Huge volumes of wastewater are generated from textile industries and they have strong resistance to biological degradation due to their chemical stability, and complex structures, as well as and toxic and carcinogenic characteristics.[1] [2] [3] Dye stuff is the major contaminant in the textile effluent and must be removed before discharging the effluent into an aqueous ecosystem because the polluted effluent seriously affects both the aesthetic quality and water transparency even at low concentrations.[4] Hence, textile wastewater has to be properly treated before being discharged into the water ecosystem. "
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    ABSTRACT: The present study is focused on the application of recovered coagulant (RC) by acidification from drinking water treatment residuals for both adjusting the initial pH and aiding coagulant in electrocoagulation. To do this, real cotton textile wastewater was used as a target pollutant, and decolorization and chemical oxygen demand (COD) removal efficiency were monitored. A preliminary test indicated that a stainless steel electrode combined with RC significantly accelerated decolorization and COD removal efficiencies, by about 52% and 56% respectively, even at an operating time of 5 min. A single electrocoagulation system meanwhile requires at least 40 min to attain the similar removal performances. Subsequently, the interactive effect of three independent variables (applied voltage, initial pH, and reaction time) on the response variables (decolorization and COD removal) was evaluated, and these parameters were statistically optimized using the response surface methodology. Analysis of variance showed a high coefficient of determination values (decolorization, R(2)= 0.9925 and COD removal, R(2)=0.9973) and satisfactory prediction second order polynomial quadratic regression models. Average decolorization and COD removal of 89.52% 94.14%, respectively, were achieved, corresponding to 97.8% and 98.1% of the predicted values under statistically optimized conditions. The results suggest that the recovered coagulant effectively played a dual role of both adjusting the initial pH and aiding coagulant in the electrocoagulation process.
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