Enhanced anaerobic mono- and co-digestion under mesophilic condition: Focusing on the magnetic field and Ti-sphere core–shell structured additives

Bioresource Technology, ISSN: 0960-8524, Vol: 310, Page: 123450
2020
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Enhancing anaerobic digestion performance is highly desired for its large-scale application. In the present work, magnetic fields (0–30 mT) and Ti-sphere core–shell structured additives (Ti-1 and Ti-2) are simultaneously introduced in anaerobic mono-digestion and co-digestions. Compared with the control group, the Ti-sphere core–shell structured additives increase the biogas yield by 27.12%–65.53% for mono-digestion and 8.47%–35.89% for co-digestion systems under the optimized magnetic field intensity (5 mT), respectively. Meanwhile, the degradation rate of total chemical oxygen demand is 54.68%–69.14% for anaerobic mono-digestion and 53.03%–78.25% for anaerobic co-digestion with Ti-sphere core–shell structured additives, respectively. The digestate with Ti-sphere core–shell structured additives exhibits the remarkable stability (45.24%–53.17%) and fertility (4.85%–4.97%). This work clarifies the effect of magnetic field in AD system, and proposes a possible mechanism for understanding the enhanced methanogenesis pathways induced by Ti-sphere core–shell structured additives.

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