a) Anoxic sludge digestion is a secondary waste water treatment; what are the major microbial processes occurring during this process? b) Explain how primary waste water treatment is carried out.
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- a) What is the consequence of discharging larger volumes of sewage that is untreated into a river? b) What is the significance of anaerobic sludge digestion in sewage treatment?Which statement among A-C is not applicable to flocculation, or floc formation, during wastewater treatment? A) O Filamentous bacteria enhance floc formation. B) O Flocculation is important for the production of a clear effluent stream of wastewater. O O Flocculation decreases the amount of BOD entering the effluent stream of wastewater. D) OA-C are all applicable.a) Define 'Disinfection' and 'Sterilization' OR differentiate between them. b) Enlist the different methods of 'Disinfection' which method would you recommend for 'Municipal Water Supply' and WHY? Depending on the availability of 'Source of Water which 'Source' is more important than the other for disinfection and WHY? Give reason. c) of them is stronger than the other and by what percentage? Define or differentiate between “Free Available Chlorine" and “Combined Available Chlorine". Write their Chemical Formulae and mention which one d) Define “Break Point Chlorination". With the help of a neat Figure' show the "Break Point" and also show "Combined Available Chlorine", "Free Available Chlorine" and "Total Available Chlorine". Mention the “Dosage" in order to obtain a “Free Available Chlorine Residual" of about 0.5 mg/l or above. e) Define the term “Chlorine Demand" of water. What are the "Factors" OR enlist the "Factors" that show the "Effectiveness of Chlorine".
- Is the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is MHA a A) differential, B) selective, C) both differential and selective media, or D) neither? Explain based on what kind of microorganisms it allows to grow.Which of the following is an important measure that may prevent bacterial contamination in tube feeding formulas? Question 71 options: a) Discarding opened containers of formula not used within 24 hours b) Adding formula to the feeding container before it empties completely c) Using the same feeding bag and tubing each day d) Adding the full days worth of formula to the bag at the start of each day8. A retort pouch is: a) Filled first with food product and then retorted (heat-sterilization) to extend product shelf life. b) Food is heat-sterilized first, and then added to a pouch under nitrogen c) Retort pouches requires thermally stable seals d) Both a and c
- Identify the microorganism/ group of microorganisms involved in the spoilage of the following food: a.. Canned curdled evaporated milk b. Blue cottony growth on oranges3. Which percentage of medical waste is infectious or hazardous? A) 25% B)50% C)75% D) 85%a) Microbial products can be classified in three major categories which related to the microorganism growth curve. By giving examples of product based on the three major categories, sketch the microbial growth and product formation curves. Describe the phases involves in the growing of microorganism for the products formation. List all references with proper citations.
- This number is always less than one a) Dilution factor Ob) Dilution c) Both dilution factor and dilution d) Neither dilution nor dilution factor1.) During a laboratory activity, Chemical reactions from mixture of chemicals should be observed under which laboratory equipment? a.) autoclave b.) fume hood c.) Labaratory Safety cabinet d.) Centrifuge 2.) Which type of equipment contains a HEPA filter that only removes suspended materials from exhausted air? a.) Fume hood b.) Biosafety Cabinet I c.) Biosafety Cabinet II d.) Biosafety Cabinet IIIAnswer the following questions: 1. Why is buffering important when preparing a growth media? 2. Explain why bacterial fermentation preserves food from spoilage.