Tannase Case Study

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Tannase has extensive applications in food, feed, beverage, brewing, pharmaceutical and chemical industries ranging from production of gallic acid, instant tea, coffee flavor refreshing drinks and acorn wine. Moreover, tannase is used in clarification of beer and fruit juices, improvement in the flavor of grape wine and manufacturing of animal feed (Das Mohapatra et al., 2009; Madeira et al., 2011). The crude tannase produced by Paecilomyces variotii showed optimum activity at pH 6.5, whereas tannase enzyme showed pH optima at 5.5. These results are in agreement with earlier reports by Batra and Saxena (2005) and Mahendran et al. (2006). The enzyme was active at acidic pH and activity decreased as the pH approached the alkaline range. Any change…show more content…
The pollution of surface and ground water increasing are due to indiscriminate discharge of industrial tannery effluents (Ranganathan and Joseph 2011). Tanning industry is one of the most polluting industries and tanning is the art of converting animal skins into lesthure. It is considered that tanning industry in India is one of the oldest and stands among the five top export oriented industry (Dhaneswar, 1990). In tanning process, vegetable and chrome tanning are the two major process involved. Estimated water consumption is 78 M3/tone of hide processed. So the tannery effluent, which is discharged by various processes from soaking to finishing, contains pollutants and chemicals. The tannery Discussion effluent when discharged into stream causes deoxygenating effect. The wastewater contains high amount of organic content and high value of BOD, COD, TSS, TDS and other important parameters. In the present study, raw tannery effluent from vegetable tanning industry was collected and their physicochemical characters are tabulated in Table No 4 & 5. The physico-chemical values of tannery effluent clearly indicate its toxic nature (Dhaneswar 1990; Viswaranjan Somnath 2001). Since the effluent showed higher BOD, COD, TDS, TSS and tannin values, an attempt has been made for the biodegradation of these effluents by different fungal isolates.

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