Download GTU BE/B.Tech 2019 Summer 7th Sem New 2170409 Environmental Biotechnology Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019

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Subject Code: 2170409 Date:18/05/2019
Subject Name: Environmental Biotechnology
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) What is compost? How is it different than vermicompost. 03
(b) ‘Methanogenesis is environment favoring process’. Explain. 04

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(c) Explain the non-conventional sources of energy, only with reference to its potential in India. 07

Q.2 (a) Explain the role of petro crops. 03
(b) Draw the self explanatory sketch of Biogas plant. 04
(c) Define biomass and enlist various biomasses as sources. 07
OR

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(c) Define activated sludge process. Explain the biological components that influence the efficiency of activated sludge process. 07

Q.3 (a) What is the role of Energy crops? Enlist few energy giving crops. 03
(b) Discuss modeling parameters for activated sludge process. 04
(c) Make a list to show the advantages and the limitations of a rotating biological contactor. 07
OR

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Q.3 (a) Which metals are considered as a heavy metal? 03
(b) Briefly explain the role of Genetically engineered microorganisms. 04
(c) Write a note on: primary wastewater treatment. 07

Q.4 (a) What are the steps to reduce pollution in distillaries? 03
(b) Write a note on: waste gas purification 04

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(c) Make a technical comparison of all methods for the Biological waste gas purification including: Biotrickling filters, Bioscrubbers, and Membrane bioreactors. 07
OR
Q.4 (a) How do symbiotic non-pathogenic associations between plant roots and fungi are significant during reforestation? 03
(b) Comment on the Eco-friendly strategy to check soil borne diseases 04
(c) Discuss the reducing environment impact of industrial effluents with respect to biodegradation of pollutants. 07

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Q.5 (a) Give a brief account on in situ bioremediation of both soil and ground water contamination. 03
(b) Summarize how short rotation forestry and cellulose are strategic as a renewable energy source. 04
(c) Narrate the role of Casuarina species plants during reforestation. Explain how development of stress tolerant plants can restore degraded lands. 07

Q.5 (a) Give suitable reactions to explain the bacterial metabolism. 03
(b) How hydrocarbons produced by some microorganisms can serve as a liquid or gaseous fuel? 04

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(c) What are the naturally occurring plants for phytoremediation and explain Transgenic plants for Phytoremediation. 07

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