Patent ID: 6896806

Claim:
An aerobic process for the reduction of colour from pulp mill effluent using a gram -ve bacterium strain of Accession No. MTCC 5099, which comprises: a) inoculating in a flask appropriate aliquots of a pulp and paper mill effluent with a cell slurry comprising a gram -ve bacterium strain of Accession No. MTCC 5099, for colour reduction studies along with a control flask containing effluent sample without any added inoculum; b) incubating the flasks set up in step (a) at 37° C./100 rpm for 48 hours; c) withdrawing samples from the above flasks in 50 ml aliquots and processing them for assessing colour and total lignin levels, d) analysing the colour removal efficiency of the above said bacterium by comparing the colour levels of the effluent treated with the bacterium with the colour level of control sample after 24 and 48-hour intervals, e) checking the viability of the above said culture in the effluent by culturing the same on nutrient agar medium and calculating CFU/ml.