| Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment |
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| 作者姓名： | 官宝红 吴忠标 徐根良 |
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| 作者单位： | Department of Environmental Engineering，Zhejiang University Hangzhou 310027，China，Department of Environmental Engineering，Zhejiang University Hangzhou 310027，China，Department of Environmental Engineering，Zhejiang University Hangzhou 310027，China |
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| 摘 要： | INTRODUCTIONInordertogetpliableandelegantterylenefabricjustlikesilk,terylenegreigeclothisalwayspretreatedwithalkali-decompositionprocesswh-ereinterylenegreigeclothishydrolyzedtosomeextentinNaOHsolutionatcertaintemperature(T)andpressure.Duringthisprocess,thesuperficialterylenefibreispeeledofffromtheclothanddis-solvedintosolution,inwhichteryleneacid(TA)andethyleneglycolaredischargedaspollutantsinwastewater.Theobtainedterylenefabricwithsi-lkenwrinkleandsoftfeelingiscalledartificialsilkfabr…
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Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment |
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| GUAN Bao-hong,WU Zhong-biao,XU Gen-liang.Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment[J].Journal of Zhejiang University Science,2004(4). |
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| Authors: | GUAN Bao-hong WU Zhong-biao XU Gen-liang |
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| Abstract: | Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics pa-rameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the mod-erate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)h and 0.44-0.59 (gCOD)/L respectively at 20 C-35 C. Activation energy (Ea) was 6.05104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment. |
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| Keywords: | Process kinetics Aerobically activated sludge COD (chemical oxygen demand) Biological treatability Prin- ting and dyeing wastewater |
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