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2003 Course Environmental Biotechnology

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Total No. of Questions : 12] P1388 [Total No. of Pages :2 [3764] - 455 B.E. (Biotechnology) Final Year ENVIRONMENTAL BIOTECHNOLOGY (2003 Course) (Sem. - I) (416281) Time : 3 Hours] [Max. Marks:100 Instructions to the candidates: 1) Answer to two sections should be written in separate answer books. 2) Draw diagrams wherever necessary. 3) Maximum marks for each question is given in parentheses. SECTION - I Q1) Describe activated sludge process for wastewater treatment. Mention the advantages and disadvantages. What factors influence the microbial composition in activated sludge process? [18] OR Q2) Describe the physical, chemical and biological characteristics of wastewater. Why is it important to characterize wastewater? [18] Q3) a) Name the types of solids present in wastewater. How would you determine the amount of suspended solids present in wastewater? [8] b) Explain fixed film biological process for wastewater treatment with an example. [8] OR Q4) a) With the help of a neat sketch, discuss the working of a Grit chamber.[8] b) Differentiate between aeration mechanisms in aerated lagoons and RBC. [8] Q5) Differentiate ANY TWO : a) Unit operation and Unit process. b) Aerated lagoons and trickling filters. c) Chemical Oxygen Demand and Biological Oxygen Demand. d) Neutralization and Proportioning. [16] P.T.O.

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