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1. |
In what PH range does anaerobic digestion occurs at best? |
A. | 6.8 – 8.0 |
B. | 0 – 5.0 |
C. | 2.3 – 4.5 |
D. | 3.5 – 7.2 |
Answer» B. 0 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 5.0 | |