Pune University BE Biotechnology Environmental Biotechnology
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.
SECTION – I
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. 
b) Write in short about sedimentation and types of sedimentation tanks.
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? 
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? 
Q6) Describe in short about treatment strategies and disposal standards for following sugar and textile industrial waste water. 
SECTION – II
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. 
|Dust size||Weight per 100g of dust (g)||Fractional efficiencyn (%)|
|b) Write in short about effects of air pollution on human health and on vegetation. |
Q8) Describe in detail about stack sampling and particulate sampling of gas pollutant. 
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. 
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? 
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