| CPC C12P 5/023 (2013.01) [B09B 3/65 (2022.01); C02F 3/28 (2013.01); B09B 2101/70 (2022.01)] | 3 Claims |

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1. A method for promoting anaerobic digestion using carbonyl iron, wherein the method comprises: adding carbonyl iron into a fermentation broth for anaerobic digestion; and
a substrate added in the fermentation broth is animal manure, kitchen waste or tail vegetables.
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