厌氧UASB－好氧工艺处理染料废水的研究

报道厌氧－好氧工艺处理染料废水的试验结果。厌氧段采用ＵＡＳＢ反应器，好氧段采用普通活性污泥法。试验结果表明，进水ＣＯＤ１１５０—１３００ｍｇ／Ｌ、色度５００倍的染料废水，在厌氧段停留６—１０ｈ，可获得６０％以上的ＣＯＤ去除率，色度降到５０—１００倍。后续曝气６ｈ，总ＣＯＤ去除率可达８５％－９０％，色度降至２０倍左右。进出水的光谱分析揭示，染料废水的脱色主要发生在厌氧段．并且通过生物降解作用来实现。从这些结果得出，ＵＡＳＢ－好氧工艺是处理染料废水的一种经济有效的方法。

Study on the Treatment of Dye-stuff Wastewater with an Anaerobic/Aerobic Process

The results were reported from a study on thetreatment of dye-stuff wastewater by using an anaerobic/aerobic process,wherein the anaerobic stage was carried out in a UASB reactor and theaerobic sarge was using a conventional activated sludge process.The results show that with a raw dye-stuff wastewater of 1150-1300 mg COD/Land 500 fold colourity(a colour scale meant by thenumber of dilution times leading to a colour thatseems to be the colour of tap water)under thecondition of HRT 6-10h at the anaerobic stage,the COD removal was more than 60% and thecolourity was reduced to 50-100 folds.If followed by an additional 6h aeration treatment,the totalCOD removal was up to 85%-90% and the colourity was further reduced to about 20 folds. Thespectrometric analyses of influent and effluent revealed that the decolouration of dye-stuffwastewater mainly took place at the anaerobic stageand was achieved through bilogical degradation.Itwas concluded that the anaerobic/aerobic processwas a cost-effective way to treat a dye-stuffwastewater and was of a great value of practicalapplication.