AI Article Synopsis
- This study introduces a new method to speed up methane production from wastewater by using elemental manganese in anaerobic digestion.
- The addition of 4 g/L of manganese significantly boosted methane yield (3.4 times increase) and production rate (4.4 times increase) compared to tests without manganese.
- Manganese also improved acetate consumption and reduced propionate generation, resulting in a higher methane proportion in the gas produced (96.9% with manganese vs. 46.6% without).
Article Abstract
This study presents a novel procedure for accelerating methanogenesis from wastewater by adding elemental manganese into the anaerobic digestion system. The results indicated that elemental manganese effectively enhanced both the methane yield and the production rate. Compared to the control test without elemental manganese, the total methane yield and production rate with 4 g/L manganese addition increased 3.4-fold (from 0.89 ± 0.03 to 2.99 ± 0.37 M/gVSS within 120 h) and 4.4-fold (from 6.2 ± 0.1 to 27.2 ± 2.2 mM/gVSS/h), respectively. Besides, more acetate consumption and less propionate generation were observed during the methanogenesis with manganese. Further studies demonstrated that the elemental manganese served as electron donors for the methanogenesis from carbon dioxide, and the final proportion of methane in the total generated gas with 4 g/L manganese addition reached 96.9%, which was 2.1-fold than that of the control (46.6%).
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525485 | PMC |
| http://dx.doi.org/10.1038/srep12732 | DOI Listing |
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