Biology · Natural Resources
निम्नलिखित में से कौन सी प्रक्रिया अपशिष्ट जल उपचार (वेस्टवाटर ट्रीटमेंट) का एक चरण है?
- 1दिए गए सभी विकल्प✓
- 2छानना (फिल्ट्रेशन)
- 3क्लोरीनीकरण
- 4वातन (एयरेशन)
सही उत्तर देखें
दिए गए सभी विकल्प
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