Secondary Sewage Treatment Process: Biological Method

Question

Secondary treatment of sewage is mainly:

Select an answer

Question & Answer (English)

Secondary treatment of sewage is mainly:

  1. Physical process
  2. Biological process — Correct Answer
  3. Chemical process
  4. Mechanical process
Explanation:
Correct Answer Explanation

Secondary treatment of sewage is primarily a Biological process. It utilizes microorganisms (bacteria) to decompose and consume the suspended organic matter (reducing BOD) that remains after primary treatment. Examples include Activated Sludge Process and Trickling Filters.

Incorrect Options Analysis
  • Physical process: This refers to Primary treatment (sedimentation, filtration).
  • Chemical process: Often used in Tertiary treatment for disinfecting or removing specific nutrients.

प्रश्न एवं उत्तर (हिंदी)

सीवेज (वाहित मल) का द्वितीयक उपचार मुख्य रूप से क्या है?

  1. भौतिक प्रक्रिया
  2. जैविक प्रक्रिया — सही उत्तर
  3. रासायनिक प्रक्रिया
  4. यांत्रिक प्रक्रिया
स्पष्टीकरण:
सही उत्तर का स्पष्टीकरण

सीवेज का द्वितीयक उपचार (Secondary treatment) मुख्य रूप से एक जैविक प्रक्रिया (Biological process) है। इसमें सूक्ष्मजीवों (बैक्टीरिया) का उपयोग करके पानी में मौजूद कार्बनिक पदार्थों को नष्ट किया जाता है, जिससे BOD कम हो जाता है।

गलत विकल्पों का विश्लेषण
  • भौतिक प्रक्रिया: यह प्राथमिक उपचार (Primary treatment) में होती है, जैसे छानना।
  • रासायनिक प्रक्रिया: यह अक्सर तृतीयक उपचार (Tertiary treatment) का हिस्सा होती है।

📚 About this Topic — GK Important Topics

This multiple choice question is from GK Important Topics, Pollution & Climate Change. It has 4 options with a detailed explanation of the correct answer and is available in both English and Hindi (द्विभाषी). Practice more MCQs from GK Important Topics to strengthen your preparation.

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