biodegradation of different concentration of dye (congo red dye) by using green and blue green algae

releasing of textile dye effluents into general water bodies is a major environmental and healthproblem. color removal, in particular, has recently become of major scientific interest, as indicated by themultitude of related research reports. during the past two decades, several physico-chemical decolorizationtechniques have been reported, few, however, have been accepted by the textile industries.their lack of implementation has been largely due to high cost, low efficiency and inapplicability to a widevariety of dyes. the ability of microorganisms to carry out dye decolorization has received much attention.green algae and blue green algae are considered as an important source for decolorizing dye and textile effluent.the dye congo red and textile dye effluent is chosen for this investigation and the green algae haematococcussp., chlorella sp., chlorella vulgaris, scenedesmus obliquuss, s. officinalis, and s. quadricauda and blue greenalgae arthospira maxima was used for the decolorization process. chlorophyll, protein content of thisorganism was tested before and after the treatment. haematococcus sp shown the maximum degradationamong all the seven microalgae was found at 10ppm which was 98%, which decolorize the textile effluentefficiently in short period of time.