Which statement among A-C is not applicable to flocculation, or floc formation, during wastewater treatment? A) OFilamentous bacteria enhance floc formation. B) O Flocculation is important for the production of a clear effluent stream of wastewater. C) O Flocculation decreases the amount of BOD entering the effluent stream of wastewater. D) OA-C are all applicable.

Q: When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this…

A: Correct option is, (d) Is catalase-positive.

Q: The reduction of pathogens to a safe and stable level is caused by the process of: a.Disinfection…

A: The objective of the question is to identify the process that reduces pathogens to a safe and stable…

Q: Ch. 6: Water intoxication may be due to: a) administration of too much hypotonic solution b)…

A: Water is the liquid present in the cells. It has salts and other chemicals dissolved in it.

Q: Most human bacterial pathogens are labeled as __ according to their temperature requirement: a)…

A: Microorganisms known as mesophiles thrive in habitats with moderate temperatures, often between 20°C…

Q: equires oxygen at a lower concentration than typically found in air.   Question 3 options:   a)…

A: Throughout nature, aerobic and anaerobic environments can be found in diverse niches. These…

Q: A worker spends 16 hours per week for 10 weeks in an area with 1.2 WL of radon daughters. a) What is…

A: Radon daughters enter the body with the inhaled air. The alpha particle dose to the lungs depends on…

Q: Which of the following is false?a) A high-level disinfectant cannot be used as a sterilant.b)…

A: According to the risk for transmitting microbial infections, the medical instruments are classified…

Q: The sediment observed in stained blood smear caused by: a) Overstraining b) More Haematoxylin in the…

A: Here we have to explain about why sediment observed in stained blood smear.

Q: Blood agar media  is a _________.   Selective media Differential media Rich media Enriched media…

A: A medium can be defined as gel or liquid which helps in growth of a bacterial culture. Medium is…

Q: How does treatment of drinking water and sewage vary in purposeand techniques?

A: Drinking water treatment is done on raw water to make it pure enough for human consumption by…

Q: Why do we test water for coliforms if they are not considered pathogenic?

A: Introduction Coliforms are gram-negative, non-sporulating and motile or immotile bacteria. They…

Q: What advantages does the anammoxprocess have over classical wastewater treatments for N removal?

A: Anammox (anaerobic ammonium oxidation is a reaction that oxidizes ammonium to dinitrogen gas using…

Q: Botulism is cause by an: a)Rickettsia b)Aneorobic spore forming bacteria c)Gram negative…

A: Botulism is not common  but a serious disease. Botulism can be transmitted through contaminated…

Q: The process in which all organisms and pathogens are destroyed is called ------.  a) Disinfection…

A: Microbes are responsible for various diseases in humans as well as animals.Microbes and pathogens…

Q: Water contaminants fall into two general categories, chemical and biological. Describe each…

A: Water contamination refers to the presence of harmful substances or pollutants in water sources,…

Q: Which statement among A-D is false regarding physical and chemical agents of control? A) O Effective…

A: Sterilization and pasteurization are equivalent processes because both are used to kill…

Q: Microbes have their biggest impact in which step of wastewater treatment? A) O preliminary B) O…

A: Wastewater treatment as the term suggests is the treatment of the sewage water in order to eliminate…

Q: Unlike a disinfectant, an antiseptica) sanitizes objects rather than sterilizes them.b) destroys all…

A: Pathogen are the organisms that can cause disease or infections after invading the host cells and…

Q: Which of the following is a nitrogenous waste product that is rarely the final product eliminated by…

A: Kidneys are the organs belong to excretory system in our body and play a major role in several other…

Q: feeding formulas

A: Tube feeding formula  is a formula that is designed for children or adults in order to provide…

Q: Describe situations that require high-level disinfection and thosefor which medium- or low-level…

A: Step 1 Disinfection involves the use of a chemical sterilant or agent to eliminate virtually all…

Q: Strict anaerobes cannot live in the presnece of oxgyen because: a.)they have to mitochondria…

A: Cell biology is the investigation of cell design and capacity, and it spins around the idea that the…

Q: The difference in the colony appearance of bacteria cells growing on mannitol salt agar is detected…

A: Mannitol salt agar is a selective culture media that is used for the isolation of the pathogenic…