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An attempt was made to know the effect of different concentrations of sugar mill effluent on aquatic ecosystem. Industrial pollution has been continues to be a major factor causing the degradation of the environment around us, affecting the water we use, the air we breathe and the soil we live on. The exponential increase in industrialization is not only consuming large areas of agriculture lands, but simultaneously causing serious environmental degradation as well as to soil. Present study on the effluent from Gayathri Sugars Pvt.Ltd. Were selected to study Sugar and alcohol manufacturing facility situated at Adloor yellareddy village, Sadashivanagar mandal of Nizamabad district T.S. The present investigation is focused on the effluents of Gayatri Sugars Pvt.Ltd the physico-chemical and biological parameters values viz., pH-5.21, Total dissolved Solids-2556.0 ppm, Chemical oxygen demand-3700 ppm, Biological oxygen demand-1126 ppm, Chlorides -497 ppm, Sulphates-422 ppm, Oil & Grease- 10.88 ppm, Electrical conductivity- 3760 μmhos/cm, Calcium-448 ppm, Magnesium- 155.52 ppm, Nitrates-28.4 ppm, Color- Brown & turbid, Lead-0.068 ppm, Copper-0.112 ppm, Zinc-0.32 ppm, Iron-28.8 ppm, Temperature-38 0C, Potassium-123.0 ppm. The Lake water is extensively used for major drinking, agriculture purposes. By discharging of industrial effluents without proper treatment causes to damage aquatic ecosystem as well as effecting on growth and development of crops.

Key words: Toxicity, Industrial effluents, Physic-chemical parameters, Fresh water ecosystem.