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What is a primary sludge?

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in Bioprocess Engineering by (80.7k points)
What is a primary sludge?

(a) Separation of liquid and solid phase

(b) Capture of suspended solids

(c) Type of wastewater treatment

(d) Suspended solids

I had been asked this question during an interview for a job.

Enquiry is from By-Products topic in chapter Effluent Treatment of Bioprocess Engineering

1 Answer

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Right choice is (b) Capture of suspended solids

The explanation is: Primary sludge is a result of the capture of suspended solids and organics in the primary treatment process through gravitational sedimentation, typically by a primary clarifier. The secondary treatment process uses microorganisms to consume the organic matter in the wastewater.

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