Question

Which of the following unit works in anaerobic conditions?
(1) sludge digestion tank
(2) sedimentation tank
(3) activated sludge treatment (4) triciding filters​

Answer 1

Answer:

1 option is correct...

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Answer 2

Sludge tank digestion is the process where anaerobic digestion takes place.

Explanation :

• Anaerobic wastewater treatment is a biological process in which organic pollutants are degraded by microorganisms in the absence of oxygen.
• Wastewater enters a bioreactor receptacle in a typical anaerobic treatment cycle.
• The bioreactor is filled with sludge, a thick, semi-solid substance made up of anaerobic bacteria and other microorganisms.
• These "anaerobes," or anaerobic microbes, decompose the biodegradable stuff in the wastewater resulting in a biogas byproduct-free effluent with lower biological oxygen demand (BOD) and/or chemical oxygen demand (COD).