The inlet was untreated
effluent coming from various sections of dairy processing units, also referred as raw effluent which is taken in effluent treatment plant. The treated effluent collected at outlet of the treatment plant was
also collected for characterization. The raw effluent entering in treatment plant was milky but at the
outlet, after treatment it was clear. The changes in color and odor of the dairy effluent might be due to
action of alga which decomposed the organic matter present in both untreated and treated effluent