Environmental Food Technology

Daffodil International University Department of Nutrition and Food Engineering Faculty of Health and Life Sciences B.Sc. in Nutrition and Food Engineering Midterm Examination - Fall 2026 Course Code: 0521-3205 Course Title: Environmental Food Technology Level and Term: L-3, T-3 Section: 241 All Course Teacher Initials: MSI, MSZ & SKP Time: 1 hour 30 minutes Total Marks: 25 "Maintaining the order of the questions is highly encouraged." Marks 1 (a) What are the major sources of dissolved oxygen in natural water bodies? [CLO1, PLO7, C2] 1 (b) Does a rice mill primarily cause local or global air pollution? Justify your answer with examples. [CLO1, PLO7, C3] 2 (c) Why is "re-use" preferred over "recycling" in the Pollution Prevention Hierarchy? Explain its environmental and economic benefits. [CLO1, PLO7, C4] 2 2 (a) Identify one classical air pollutant and state one of its major sources. [CLO1, PLO7, C3] 1 (b) A water body becomes covered with dense aquatic plants and algae due to increased nutrient inflow. Relate this process and summarize how it can affect the aquatic ecosystem. [CLO1, PLO7, C2] 2 (c) Apply two strategies from an Air Quality Management Plan to reduce air pollution in an urban area. [CLO1, PLO7, C3] 2 3 (a) A glass greenhouse allows solar radiation to enter but restricts the escape of heat. Outline the mechanism of greenhouse effect on earth. [CLO1, PLO7, C2] 2 (b) Analyze how the elevated greenhouse effect may affect food security in Bangladesh. [CLO1, PLO7, C4] 3 4 (a) Explain the soda-lime treatment method for removing both temporary and permanent hardness of water, with appropriate chemical reactions. [CLO2, PLO7, C5] 2 (b) Discuss the working principle of electrodialysis in water treatment and its practical applications. [CLO2, PLO7, C6] 3 5 (a) Design a flow diagram of a biological Effluent Treatment Plant (ETP), showing the major treatment stages in sequence. [CLO2, PLO7, C6] 2 (b) Compare the limitations of biological and physicochemical effluent treatment of wastewater. [CLO2, PLO7, C5] 3