General Knowledge Ecology and Environment

सांडपाण्यावर केल्या जाणाऱ्या प्रक्रियेला सामान्यतः ______ प्रक्रिया म्हणतात.

1

सूक्ष्मजीव

2

सांडपाणी

3

प्रदूषक

4

जिवाणू

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