Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Textbook Question
Chapter 27, Problem 1MCQ
Activated sludge system
- a. the process takes place under aerobic conditions
- b. the process takes place under anaerobic conditions.
- c. the amount of oxygen doesn’t make any difference
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2. The operations staff at a sewage treatment plant has decided to reduce the SRT of their activated sludge process from 6 days to 3 days by increasing the recycle rate. The goal is to reduce the oxygen requirement. You have been called in as an expert to give a qualitative assessment of this plan. a. Will the oxygen requirement actually be reduced? b. Will the MLVSS increase, decrease or stay about the same? c. Will the sludge settling characteristics improve, stay about the same, or worsen? d. Will the effluent BOD concentration increase, decrease, or stay about the same? 3. Filamentous bacteria that cause sludge foaming in activated sludge treatment systems differ from the desirable floc-forming bacteria in several aspects of their metabolism. First, filamentous bacteria have different growth curves than floc-forming bacteria as shown in the figure below. Second, filamentous bacteria use only oxygen as an electron acceptor and cannot use nitrate for that function; floc-forming…
Chapter 27 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 27 - The koala is a leaf-eating animal. What can you...Ch. 27 - Give one possible explanation of why Penicillium...Ch. 27 - In the sulfur cycle, microbes degrade organic...Ch. 27 - Why is the phosphorus cycle important?Ch. 27 - DRAW IT 5. Identify where the following processes...Ch. 27 - Prob. 6RCh. 27 - Outline the treatment process for drinking water.Ch. 27 - Prob. 8RCh. 27 - Bioremediation refers to the use of living...Ch. 27 - NAME IT 10. These nitrogen-fixing prokaryotes...
Ch. 27 - Activated sludge system a. the process takes place...Ch. 27 - Prob. 2MCQCh. 27 - Nitrogen fixation a. the process takes place under...Ch. 27 - Prob. 4MCQCh. 27 - The water used to prepare intravenous solutions in...Ch. 27 - CO2+H2SLightLightC6H12O6+S0 a. aerobic respiration...Ch. 27 - Prob. 7MCQCh. 27 - CO2+8H++8eCH4+2H2O a. aerobic respiration b....Ch. 27 - Prob. 9MCQCh. 27 - Coliforms are used as indicator organisms of...Ch. 27 - Prob. 1ACh. 27 - Explain the effect of dumping untreated sewage...Ch. 27 - Flooding after two weeks of heavy rainfall in...Ch. 27 - The bioremediation process shown in the photograph...
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- Which of the following requires aerobic conditions? Question 7 options: A) nitrogen fixation B) sludge digestion C) primary sewage treatment D) secondary sewage treatmentarrow_forwardHow does primary sludge differ from activated sludge? What type of changes in the sludge are carried out in anaerobic sludge digester? Give the composition of biogas produced in the sewage treatment plant.arrow_forwardActivated sludge should have the ability to settle quickly so that it can: a. be rapidly pumped back from sedimentation tank to aeration tank b.absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank c.be discarded and anaerobically digested d.absorb colloidal organic matter. Please provide the answer with a plagiarism-free proper explanation. Kindly also refer to the NCERT 12th Biology.arrow_forward
- Active transport ________. A. utilizes energy B. cannot be saturated C. requires cofactors D. cannot transport molecules against a concentration gradientarrow_forwardOnly sketch the oxygen requirement tubes and than answer the questions on bottom based on the oxygen requirements in the second picture right diagram, DONT look at motility tubes, they are not a part of this questionarrow_forwardSuppose you inoculated two 0.4% semi-solid agar deeps: one deep was inoculated with a motile organism and the other deep with a non-motile organism. You (in a stroke of genius) found a way to quantitatively analyze the deeps using a spectrophotometer. Which deep would have the highest absorbance and why?arrow_forward
- Select the correct answer from the answers provided. Psychrophiles would be expected to grow a. in hot springs c. at refrigeration temperatures b. on the human body d. at low pHarrow_forwardRequires oxygen at a lower concentration than typically found in air. Question 3 options: a) Obligate aerobe b) Facultative anaerobe c) microaerophile d) None of the abovearrow_forwardDuring plasmolysis, the volume of water will__________. During lysis, the volume of water will__________. A. decrease; increase B. increase; stay the same C. increase; decrease D. decrease; stay the samearrow_forward
- from the figure, explain how rapid pH change mechanism serves as a defense against infectionarrow_forwardList three (3) advantages microbes have when living in a biofilm, as compared to planktonic growth. Then explain how each biofilm advantage impacts human health.arrow_forwardin a leachate experiment where we put banana peels in a container to observe for 4 weeks. what are the factors that potentially caused the notable physical changes in the decomposing material? Discuss the effect of each factor the set ups.arrow_forward
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