Civil Engineering (CE) Exam  >  Civil Engineering (CE) Questions  >  Which one of the following is correct?a)The p... Start Learning for Free
Which one of the following is correct?
  • a)
    The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.
  • b)
    For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.
  • c)
    A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.
  • d)
    The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which one of the following is correct?a)The partially treated effluent...
Chemoheterotrophs are the organisms which live off the organic matter by consuming them. Animals and fungi are the best examples. Thus, chemoheterotrophs are the most important of the species that degrade the organic matter.
is the oxygen demand of the effluent for the first five days, while the ultimate BOD is total oxygen demand to degrade all the organic matter and it may take infinite time; hence, the ratio must be between 0 and 1. Hence, (2) is incorrect.
Eutrophic lakes are contrary to what is mentioned in option (3). They are old, very high in nutrient contents.
Free Test
Community Answer
Which one of the following is correct?a)The partially treated effluent...
The correct answer is option 'D': The most important type of species involved in the degradation of organic matter in the case of activated sludge process-based wastewater treatment is chemoheterotrophs.

Explanation:
Activated sludge process is a widely used biological wastewater treatment method. It involves the use of microorganisms to break down organic matter in wastewater. The microorganisms responsible for this degradation are mainly chemoheterotrophs.

Chemoheterotrophs are organisms that obtain their energy by breaking down organic molecules through chemical reactions. They use organic compounds as a source of carbon and energy. In the case of activated sludge process, the organic matter in the wastewater serves as the source of carbon and energy for the chemoheterotrophs.

The activated sludge process consists of aeration tanks where the wastewater is mixed with a microbial culture (activated sludge) containing a high concentration of microorganisms. These microorganisms, including chemoheterotrophs, utilize the organic matter in the wastewater as a food source.

During the treatment process, the wastewater is aerated to provide sufficient oxygen for the microorganisms. The oxygen is essential for the metabolic activities of the microorganisms, including the breakdown of organic matter. The chemoheterotrophs play a crucial role in this process by utilizing the organic matter and converting it into simpler compounds.

The degradation of organic matter by chemoheterotrophs results in the reduction of biochemical oxygen demand (BOD) in the wastewater. BOD is a measure of the amount of dissolved oxygen required by microorganisms to break down the organic matter. By reducing the BOD, the chemoheterotrophs help to improve the water quality and reduce the environmental impact of the wastewater.

In summary, chemoheterotrophs are the most important type of species involved in the degradation of organic matter in the activated sludge process-based wastewater treatment. They utilize the organic matter as a food source and play a crucial role in reducing the BOD of the wastewater.
Explore Courses for Civil Engineering (CE) exam

Similar Civil Engineering (CE) Doubts

Top Courses for Civil Engineering (CE)

Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer?
Question Description
Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE). Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Which one of the following is correct?a)The partially treated effluent from a food processing industry, containing high concentration of biodegradable organics, is being discharged into a flowing river at a point P. If the rate of degradation of the organics is higher than the rate of aeration, then dissolved oxygen of the river water will be lowest at point P.b)For an effluent sample of a sewage treatment plant, the ratio upon ultimate BOD is more than 1.c)A young lake characterized by low nutrient content and low plant productivity is called a eutrophic lake.d)The most important type of species involved in the degradation of organic matter in the case of activated sludge process based wastewater treatment is chemoheterotrophs.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
Explore Courses for Civil Engineering (CE) exam

Top Courses for Civil Engineering (CE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev