1. Enhanced biomethane production from waste activated sludge anaerobic digestion by ceramsite and amended Fe 2 O 3 ceramsite.
- Author
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Shen D, Zhang P, Wu SL, Long Y, Wei W, and Ni BJ
- Subjects
- Anaerobiosis, Methane, Bioreactors, Waste Disposal, Fluid methods, Sewage chemistry, Bacteria, Anaerobic metabolism, Complex Mixtures
- Abstract
Wastes recycling and reutilization technique could simultaneously fulfill waste control and energy recovery sustainably, which has attracted increasing attention. This work proposed a novel waste reuse technology utilizing ceramsite and amended Fe
2 O3 -ceramsite made from waste activated sludge (WAS) as additives to promote the yield of methane from WAS anaerobic digestion (AD). Experimental results demonstrated that compared to the control (85.05 ± 0.2 mL CH4 /g-VS), the cumulative methane yield was effectively enhanced by 14% and 40% when ceramsite and Fe2 O3 -ceramsite were added. Further investigation revealed that ceramsite, especially the Fe2 O3 -ceramsite, enriched the populations of key anaerobes involved in hydrolysis, acidification, and methanogenesis. Meanwhile, potential syntrophic metabolisms between syntrophic bacteria and methanogens were confirmed in the Fe2 O3 -ceramsite AD system. Mechanisms studies exhibited that ceramsite and Fe2 O3 -ceramsite reinforced intermediate processes for methane production. The favorable pore structure, enhanced Fe (III) reduction capacity and conductivity also contributed a lot to the AD process., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)- Published
- 2024
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