DEGRADATION OF METHYLENE BLUE IN TEXTILE WASTE WATER USING ACTIVATED SAWDUST AND EGGSHELL BIOSORBENT

Environmental Engineering

NATIONAL CONFERENCE ON TECHNOLOGICAL ADVANCEMENTS IN ENGINEERING

Many countries including India are experiencing severe environmental problems due to their rapid industrialization. The textile wastewater contains different dyes which are harmful to the environment. Therefore, wastewater from textile industry has to be treated before being discharged into the environment. The removal of dyes from effluent using adsorption process provides an attractive alternative treatment. The purpose of the present study was to investigate the suitability of using activated sawdust and eggshell as the effective adsorbents used for color removal from the effluent. Batch adsorption studies conducted for the removal of Methylene blue dye in aqueous solution. The removal of dyes at the different contact time, adsorbent dosage, initial dye concentration & pH by activated sawdust and eggshell as adsorbents has been studied and compared. The result shows that both adsorbents are very effective for dye effluent treatment. The maximum adsorption capacity of sawdust was found to be 97.05% and eggshell was 76.47% at neutral pH. The Performance of sawdust adsorbent is good at the pH in between 6 and 7and eggshell adsorbent performed well in the basic pH. The optimum contact time is 30 minutes and optimum adsorbent dosage is 1.5 gram for the sawdust experiment. In the case of the eggshell experiment, the optimum time obtained is 45 minutes and optimum adsorbent dosage is 2 gram. As the initial concentration increases, adsorption efficiency decreases. So, optimum concentration is the lowest concentration of 20mg/l for both experiments. When comparing the both adsorbents, sawdust has high removal efficiency than eggshell at same operating conditions.

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