GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code:2161304
Subject Name:Biological Processes for Wastewater Treatment
Time:10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
Q.1 (a) State the objectives of Biological Waste-Water Treatment. [03]
(b) Differentiate between: Aerobic & Anaerobic treatment process for wastewater treatment [07]
(c) Draw the BOD progression curve and explain the different phases of it. [03]
--- Content provided by FirstRanker.com ---
Q.2 (a) Differentiate between BOD, COD & TOC. [04]
(b) Define: (1) Specific growth rate (2) Yield coefficient (3) Endogenous decay coefficient (4) Maximum substrate utilization rate constant [07]
(c) Enlist and explain the factors affecting the BOD test. [07]
OR
Q.2 (c) Write down the mass balance for CFSTR with recycle and hence Derive the equation for finding biokinetic constant. [03]
--- Content provided by FirstRanker.com ---
Q.3 (a) Write a brief note on “bulking of sludge in ASP”. [04]
(b) Explain the mechanism by which substrate removal takes place in suspended growth process. [07]
(c) Highlight the importance of BOD for environmental engineers [03]
OR
Q.3 (a) Describe with sketches the treatment of waste water by activated sludge process. Mention the advantages and disadvantages of this system. [04]
--- Content provided by FirstRanker.com ---
(b) Give the brief classification of various Biological treatment processes used for Wastewater Treatment. [07](c) Enlist and explain the advantages and disadvantages of anaerobic treatment processes. [03]
Q.4 (a) Differentiate between the Oxidation Ditch & oxidation Ponds. [04]
(b) Explain in detail anaerobic sludge digestion. [07]
(c) Enlist and explain the basic steps involved in the overall anaerobic oxidation of a waste. [03]
--- Content provided by FirstRanker.com ---
OR
Q.4 (a) Write a short note: Bio-towers. [04]
(b) Discuss the mechanism of working of UASB with neat sketch. [07]
(c) Enlist the factors affecting the performance of aerators and describe anyone in brief. [03]
Date:14/05/2019
--- Content provided by FirstRanker.com ---
Total Marks: 70Q.5 (a) Explain the types of aerators. [03]
(b) Enlist the major problems faced by small communities to treat the domestic wastewater [04]
(c) Discuss the fundamental considerations in the application of natural treatment systems. [07]
--- Content provided by FirstRanker.com ---
OR
Q.5 (a) Enlist the different types of natural treatment systems used for small community. [03]
(b) Write a brief note: Root zone treatment [04]
(c) Write a detailed note on: packaged treatment plants [07]
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University