Discussion :: Waste Water Engineering - Section 6 (Q.No.34)
In a trickling filter
Answer: Option B
No answer description available for this question.
|Harjeet said: (Jun 15, 2016)|
|The Answer is wrong. As Per Govt of India Manual, a number of books and International Source Book issued by United Nation of Environmental Programme, filtration also occurs in Trickling filter.
So the correct answer is D (Both).
|Satyam Shukla said: (Jul 20, 2017)|
|I think Option D is correct.|
|Orai said: (Jun 6, 2018)|
|Option D is correct.|
|Karan Singh said: (Jan 9, 2020)|
|D is the correct answer. I too agree.|
|Anirban Roy said: (Aug 3, 2020)|
|I also agree it should be D as:
The process of filtration can be explained by certain theories as:
I) Mechanical straining÷ big suspended or dissolved particles get arrested in voids.
II) Flocculation and Sedimentation÷ voids act like tiny sedimentation tanks arrest the colloidal matter which forms a gel and arrest finer particles.
III) Biological metabolism ÷ microorganisms in the voids digest the bacteria as food
IV) Electrolytic changes ÷ filtration by the method of ion exchange.
So, both come true.
|Abdul Noblen said: (Nov 24, 2021)|
|B is correct.
According to Spellman, The trickling filter does not provide any actual filtration. The filter media provides a large amount of surface area that the microorganisms can cling to and grow in a slime that forms on the media as they feed on the organic material in the wastewater.
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