Iron-fortified Anaerobic Co-digestion Performance of Kitchen Waste and Pennisetum Hybrid

Wo, Defang; Bi, Guican; Li, Lianhua; Kong, Xiaoying; Jiang, Enchen; Xie, Jun

doi:10.1007/s12155-022-10426-0

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…Whereas, Ugwu et al [26] reported the CH 4 enhancement from 16.1-180% with the addition of Fe 3 O 4 NPs. Wo et al [27] has cited that the addition of iron traces facilitates the AD process.…”

Section: Introductionmentioning

confidence: 99%

Influence of Magnetic Nanoparticles and Organic Loading Rates (OLRs) on the Behavior of Continuous Stir Tank Reactor (CSTR)

Ali

Mahar

Panhwar

et al. 2022

Preprint

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In this study, the biocompatibility of iron oxide nanoparticles (Fe3O4 NPs) with a concentration of 75 mg/L was experimentally investigated with different organic loading rates (OLRs) in Continuous Stir Tank Reactors (CSTRs). The OLRs were started from the lowest concentration of 0.3 gVS/Ld to the highest at 1.3 gVS/Ld with an intermediate of 0.8 gVS/Ld. During this experimentation, the behavior of other parameters like pH, soluble chemical oxygen demand (sCOD), total volatile fatty acids (TVFAs) generation and degradation, total solids (TS) and VS removal were monitored along with CH4 generation. It was observed that the NPs efficiency was higher at the lowest OLR. The CH4 yield was optimal at 0.3 gVS/Ld, which was 725.9 mL/gVS and reduced to 652.02 mL/gVS in R1 (with NPs additives). However, R2 (without NPs) showed much-stabilized behavior and get increasing from 372.8 to 424.4 mL/gVS at 0.3 to 1.3 gVS/Ld of OLR, respectively. Moreover, the higher removal of sCOD, TVFAs, and TV/VS were archived in R1 at the shortest hydraulic retention time (HRT).

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Section: Introductionmentioning

confidence: 99%

Influence of Magnetic Nanoparticles and Organic Loading Rates (OLRs) on the Behavior of Continuous Stir Tank Reactor (CSTR)

Ali

Mahar

Panhwar

et al. 2022

Preprint

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show abstract

Characterization of Mixing by CFD Simulation and Optimization of Mixing Frequency to Break Scum and Enhance Methane Yield in Chinese Dome Digester

et al. 2022

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The Chinese dome digester (CDD) is a low-cost and the most popular anaerobic digester that is used for the treatment of organic waste such as food waste and cow dung. However, the main challenge of CDD is scum formation due to inadequate mixing intensity. This study explores computational fluid dynamics (CFD) to characterize mixing in CDD and the effects of mixing frequency (0, 4, 6, and 8 times per day) on the performance of semicontinuous anaerobic digestion to break scum and enhance methane yield. The flow field simulation on a lab-scale CDD by Ansys Fluent (v.19.2), a finite volume solver, estimated that 45% of CDD working volume was occupied by dead zones which could nurture scum. The simulation results elicited the optimization of mixing frequency. Four CDDs were operated to investigate the optimum mixing frequency. The average scum thickness for the non-mixed digester was 2 ± 0.1 cm compared to 0.2 ± 0.1, 0.8 ± 0.1, and 1.3 ± 0.2 cm for the mixed digesters (4, 6, and 8 times per day, respectively). The average methane yields for 0, 4, 6, and 8 times per day were 206 ± 191, 602 ± 87, 555 ± 59, and 492 ± 109 mL g-VS−1, respectively. Four times per day was the optimum mixing frequency and the energy required to break scum was 6.1 ± 0.3 Joules per mixing cycle. This study proves that by optimizing the mixing frequency in CDD, scum formation can be controlled without additional investment cost.

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Enhancement mechanisms of iron powder on co-digestion of kitchen waste and Pennisetum hybrid

Xing

et al. 2022

Biochemical Engineering Journal

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Iron-fortified Anaerobic Co-digestion Performance of Kitchen Waste and Pennisetum Hybrid

Cited by 5 publications

References 40 publications

Influence of Magnetic Nanoparticles and Organic Loading Rates (OLRs) on the Behavior of Continuous Stir Tank Reactor (CSTR)

Influence of Magnetic Nanoparticles and Organic Loading Rates (OLRs) on the Behavior of Continuous Stir Tank Reactor (CSTR)

Characterization of Mixing by CFD Simulation and Optimization of Mixing Frequency to Break Scum and Enhance Methane Yield in Chinese Dome Digester

Enhancement mechanisms of iron powder on co-digestion of kitchen waste and Pennisetum hybrid

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