tailieunhanh - Waste Water Treatment and Reutilization 2011 Part 3

Tham khảo tài liệu 'waste water treatment and reutilization 2011 part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Removal of Endocrine Disruptors in Waste Waters by Means of Bioreactors 43 From the industrial point of view the results discussed above indicate a substantial reduction in the processing times to bioremediate water polluted by DMP and thus a reduction in the process s costs. In fact it is possible to correlate the parameters a or . which are functions of AT with the reduction in the bioremediation time Tr defined as Tr T. - T. . iso non-iso x 100 T iso 13 where Tiso and Tnon-iso are the time required to obtain the same percentage of DMP biodegradation under isothermal and non-isothermal conditions respectively. To correlate Tr with the applied AT it is necessary to calculate the time required to obtain the same amount of DMP removal under isothermal and non-isothermal conditions. This calculation can be done graphically or analytically. Fig. 10. DMP in function of reaction time. AT 0 C A AT 10 C O AT 20 C AT 30 C. As one example of the graphical calculation let us see Figure 10 where we has been reported as a function of the time of enzyme treatment the DMP decrease in the case of Taverage 25 C with AT 0 or 10 or 20 or 30 C. The initial DMP concentration was 5 mM. To obtain the same biodegradation of DMP for example a 50 reduction 161 minutes are needed for the isothermal condition while 145 or 134 or 125 minutes are required for AT 10 C AT 20 C AT 30 C respectively. It follows that a value of Tr is obtained with a AT 10 C a Tr with a AT 20 C and a Tr 25 with a AT 30 C. The Tr values increase with an increase in the applied AT and therefore with the . The analytical approach is based on the consideration that the same DMP degradation is obtained when RRc at 0 . Tiso RRc at 0 . Tnon-iso where RR stands for the reaction rate. By recalling that RRc at 0 Ti RRc at 0 I 1 . AT It i C A1 0 iso C A1 0 100 noil-iso 14 after a series of mathematical steps one obtains Tr r aAT L aAT 100 J 100 . _ a AT a AT 100 100 r . 1 L100 P. . J 100 15 44 Waste