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Abstract ▼ AI-Helper

The textile wastewater containing a little amount of domestic sewage is being treated at the public owned stooge treatment plant(STP) by the conventional activated sludge process. This process has some limits to reduce the colouring agent of the wastewater to a satisfiable level. A lab-scale ozone f...

The textile wastewater containing a little amount of domestic sewage is being treated at the public owned stooge treatment plant(STP) by the conventional activated sludge process. This process has some limits to reduce the colouring agent of the wastewater to a satisfiable level. A lab-scale ozone facility was built to treat some synthetic dye solutions and a highly colored influent and effluent from the public owned STP Constant of color removalabilities per unit ozone dosage, $k(mg/L)^{-1}$ for reactive dyes, disperse dyes, the effluent and influent of STP were 0.182, 0.072, 0.049 and $0.030(mg/L)^{-1}$, respectively. Reactive dyes decolorized more effectively than the disperse dyes when treated with ozone. Color was fractionated into four parts, that is, AColor(adsorbability), BColor(biodegradability), A&BColor(adsorbability and biodegradability) and NRColor(non-removal). The same method was applied in the DOC distribution. DOC was fractionated into four parts which were ADOC, BDOC, A&BDOC and NRDOC. Before ozonation of reactive dyes, influent and effluent of STP, it was found that 86%, 73% and 77% of adsorbable color(AColor+A&BColor) were contained. Based on the result of color distribution, ozonation and adsorption process need to be adopted in order to enhance color removalability caused by dyestuff and adsorptive organic, respectively.

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