Exploring the effects of ZVI addition on resource recovery in the anaerobic digestion process

Abstract

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Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

“…2 d). The sludge would generate CO 2 in the whole anaerobic process, and MCO 3 would be generated after dissolving in water with metal ions in the system, which had a certain adsorption effect on P ( Puyol et al, 2018 ). As shown in the Fig.…”

Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation

“…The B 0,slow of reactors with higher ZVI added has a lower value as compared with R2 where ZVI was added at 0.5 g·ZVI/g·TS. This summarized that both rapidly and slowly biodegradable components were improved with the assistance of ZVI addition. , …”

“…This summarized that both rapidly and slowly biodegradable components were improved with the assistance of ZVI addition. 22,23 3.3. Characteristics of the Digested Algal Sludge.…”

In-situ methane enrichment in continuous anaerobic digestion of pig slurry by zero-valent iron nanoparticles addition under mesophilic and thermophilic conditions

“…The effluent and reactor content Fe concentration decreased to 0.05 mgFe g -1 65 days after the last pulse, following the biogas methane content decreasing tendency during Phase 3. The fate of nZVI after being corroded to Fe 2+ in the anaerobic digester is probably the formation of insoluble siderite (FeCO3), by interaction with CO2; or the precipitation with PO4 3to form vivianite (Fe3(PO4)2), as described in both cases by Puyol and co-workers (2018) [46]. The average methane production rate increased 165% during the nZVI application phases, from 65±22 to 172±56 Lmethane kgVS -1 d -1 (Table 2, Figure S3).…”