Pune University BE Biotechnology Environmental Biotechnology Question Papers

Pune University BE Biotechnology Environmental Biotechnology

Question Papers

B.E. (Biotechnology) ENVIRONMENTAL BIOTECHNOLOGY (2008 Pattern)

(Elective – I) (Sem. – I)

Time: 3 Hours]                                                                                              [Max. Marks :100

Instructions to the candidates:

1)            AnswerQ.No.1 orQ.No.2, Answer Q.No.3 orQ.No.4, Answer Q.No.5 orQ.No.6 from Section-1&Answer Q.No.7orQ.No.8, Answer Q.No.9orQ.No.10, Answer Q.No.11 or Q.No.12 from Section – II.

2)            Answers to the two sections should be written in separate answer books.

3)            Neat diagrams should be drawn wherever necessary.


Q1) Answer the following :

a)            A grit particle of diameter 0.2mm and density, 1500kg/m3 is to be captured in a horizontal grit chamber of length 18m and width 1.0m. The wastewater approach velocity carrying the grit particle is 0.3m/s and the flow rate is 0.15m3/s. Write down whether the particle will be settled in the grit chamber or not. The density of the wastewater = 1000kg/m3 and its viscosity is 0.001kg/m-s.                                                                            [10]

b)           Write in short about sedimentation and types of sedimentation tanks.[8]


Q2) Explain in detail about the following parameters which are been used for

the analysis of waste water.                                                                      [2 x 9 = 18]

a)            Suspended solids.

b)           Colour and odour.

Q3) Answer the following :                                                                               [2 x 8 = 16]

a)            Compare trickling filters with activated sludge systems.

b)           What is packed bed reactor? Which control scheme is applicable to packed bed reactor? Can a packed bed reactor used for liquid phase reaction.


Q4) How is waste water treated using an oxidation ditch? How does an oxidation ditch system differ from a packaged plant system?                                                                      [16]

Q5) What does industrial effluent mean? What is the impact of industrial effluents on human life? How industrial effluents influence another pollution? How do effluent treatment plants work?                                                                                                                             [16]


Q6) Describe in short about treatment strategies and disposal standards for following sugar and textile industrial waste water.                                                                        [16]


Q7) Answer the following :

a)            The following table shows the size distribution of a dust sample and the fraction efficiency of removal in a gas cleaning equipment. Calculate the overall collector efficiency.                                                                                                          [10]

Dust size Weight per 100g of dust (g) Fractional efficiencyn (%)
< 5 2 1
5-10 2 7
10-15 4 16
15-20 7 44
20-25 10 67
25-30 8 81
30-35 7 88
35-40 10 92
40-50 15 93
50-60 20 95
60-70 10 98
> 70 5 100
b) Write in short about effects of air pollution on human health and on vegetation.                                                                                                    [8]



Q8) Describe in detail about stack sampling and particulate sampling of gas pollutant.    [18]

Q9) Write notes on the following :

a)            Role of methanogens in xenobiotic degradation.

b)            Biological detoxification.


Q10)Explain the necessity of treating hazardous waste? Discuss biotechnological applications for hazardous waste management.                                                                         [16]

Q11)Write short notes on the following :

a)   Land farming.     b) Bioventing

c)     Biosparging        d) Biostimulation


Q12)What is bioremediation and what are the different types of bioremediation? What are the limitations to bioremediation?                                                                                [16]

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