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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. SECTION - II Q6) Write short note on : a) Composting. b) Bioremediation. c) Phytoremediation. [18] OR Q7) a) Why are hydrocarbons slow to degrade? [18] b) What is the role of surfactants in bioremediation of hydrocarbons? c) How does the addition of fertilizer to oil spills affect the growth of bacteria? Q8) Explain the disposal of solid waste by composting. [8] OR Q9) Describe the aerobic and anaerobic degradation of Polychlorinated Hydrocarbons. [8] Q10)What is the significance of Bioventing and Bioaugmentation in Bioremediation? [8] OR Q11)What is the difference between slurry phase and solid phase bioremediation? [8] Q12)Write short notes on ANY TWO : [16] a) Applications of land farming. b) Advantages and limitations of Bioremediation. c) Methods for Waste minimization. d) Sampling techniques in wastewater. kbkb [3764]-455 2

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