DEINKING OF OLD USED PAPERS USING CRUDE RHAMNOLIPID BIOSURFACTANTASHUTOSH MISHRA AND RAKESH KUMAR TRIVEDIAbstract Surfactants are having a great role in world chemical industries majorly used in laundry detergents, household, and personal care products along with pharmaceuticals. Apart from this surfactants have special use in the pulp and paper industry for the deinking process that makes new paper from the old paper. Generally, anionic synthetic surfactants are using for this purpose. As the synthetic surfactants are non-biodegradable and non-eco-friendly, this study was conducted by replacing these surfactants with the rhamnolipid biosurfactant, which was manufactured in the laboratory with the help of Pseudomonas aeruginosa MTCC 424 using residual oil from vegetable oil processing industry. After manufacturing the new hand sheet, the brightness % and the ash content were checked. The brightness efficiency and ash content were found 58 percent and 8.97 percent, respectively. The optimum concentration of the crude rhamnolipid biosurfactant of concentration 0.9 g/L was used 0.12 percent at pH 9. |