Solid-state anaerobic co-digestion of organic fraction of municipal waste and sawdust: impact of co-digestion ratio, inoculum-to-substrate ratio, and total solids

Ziaee, Fazel; Mokhtarani, Nader; Niavol, Kasra Pourrostami

doi:10.1007/s10532-021-09937-y

Cited by 17 publications

(6 citation statements)

References 53 publications

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“…Moreover, the methane yield values obtained for AP in this study are significantly higher than methane yield values (160-350 mL/g VS) reported for several fruit and vegetable wastes [41][42][43][44][45][46].…”

Section: Methane Yieldscontrasting

confidence: 80%

Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace

et al. 2021

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Due to its high water and organic contents, management of apple pomace (AP) poses several waste management challenges on the apple juice and cider producing industries. Bioconversion of AP into biogas provides an excellent possibility to reduce the environmental challenge faced in the management of AP waste along with producing renewable energy in the form of methane. This study investigated the effect of carbon-based conductive materials (biochar and graphene) and trace metals supplementation to improve biogas production from AP. The results indicate that supplementation of biochar, trace metals, and graphene significantly improves the biogas production from AP. Trace metal and biochar supplementation at a COD concentration of 6000 mg/L resulted in 7.2% and 13.3% increases in the biogas production, respectively. When trace metals and biochar were supplemented together, the biogas production increased by 22.7%. This synergistic effect was also observed at the COD concentration of 12,000 mg/L. The improvement in the biogas formation was significantly higher for graphene supplemented reactors (27.8%). Moreover, biochar and trace metals supplementation also led to 19.6% and 23.0% increases in the methane yield relative to the reactor fed only with AP, respectively. These results suggest anaerobic digestion supplemented with carbon-based conductive materials and trace metals is a viable option for valorizing apple pomace.

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Section: Methane Yieldscontrasting

confidence: 80%

Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace

et al. 2021

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“…In other experiments, biogas yield was boosted by 100.2% over the control with a C/N ratio of 25:1 over the value of 9 [42]. When the ratio of food waste to rice straw was tuned at C/N 30, pH 7.32, and F/M 1.87, the CH 4 yield increased by 94.41% over rice straw mono-digestion [10]. Contrastingly, the oily biological sludge's C/N ratio is lower than the ideal 20-30 ratio required by anaerobic digestion technology for desired biogas yield [37].…”

Section: Carbon To Nitrogen Ratiomentioning

confidence: 84%

“…The concept of co-digestion to improve the methane yield using different substrate combinations is called anaerobic co-digestion (AcoD); it may create the best synergisms in the biodigester. There have been various pieces of research performed on the AcoD of lignocellulosic feedstocks with other different organic biomasses, such as animal manure [6,7], food waste, aquatic plants, and algal biomass, to improve the methane yield [8][9][10], as shown in Figure 2. Microbiology of organic material in the anaerobic co-digestion system (adapted from [1]).…”

Section: Introductionmentioning

confidence: 99%

Impacts of Anaerobic Co-Digestion on Different Influencing Parameters: A Critical Review

2022

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Lignocellulosic feedstocks are year-round, available bio-residues that are the right candidates for counteracting the energy crises and global warming facing the world today. However, lignin leads to a slow hydrolysis rate and is a major bottleneck for biogas production via anaerobic digestion. Anaerobic co-digestion (AcoD) is an economical method available, which overcomes the limitation of a single feedstock’s properties in an anaerobic digestion process. This paper critically reviews the impacts of co-digestion on lignocellulosic biomass degradation, process stability, various working parameters, and microbial activities that improve methane yields. A combination of compatible substrates is chosen to improve the biomethane yield and conversion rate of organic matter. AcoD is a promising method in the delignification of lignocellulosic biomass as an acid pretreatment. Ultimate practices to control the impact of co-digestion on system performances include co-feed selection, in terms of both carbon-to-nitrogen (C/N) and mixing ratios, and other operating conditions. A detailed analysis is performed using data reported in the recent past to assess the sensitivity of influencing parameters on the resultant biogas yield. For the investigators motivated by the basic principles of AcoD technology, this review paper generates baseline data for further research work around co-digestion.

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“…The biogas yields obtained under solid-state conditions are lower than those from wet digestion systems. The increase in solid content causes a decrease in the biogas yield [75]. This fact was demonstrated by Li et al [76] when evaluating the co-digestion of corn stover and chicken manure under different configurations, that is, wet, high-solid, and solid-state digestion.…”

Section: Commercial Technologies For Ss-admentioning

confidence: 87%

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

et al. 2021

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High-solid and solid-state anaerobic digestion are technologies capable of achieving high reactor productivity. The high organic load admissible for this type of configuration makes these technologies an ideal ally in the conversion of waste into bioenergy. However, there are still several factors associated with these technologies that result in low performance. The economic model based on a linear approach is unsustainable, and changes leading to the development of a low-carbon model with a high degree of circularity are necessary. Digestion technology may represent a key driver leading these changes but it is undeniable that the profitability of these plants needs to be increased. In the present review, the digestion process under high-solid-content configurations is analyzed and the different strategies for increasing reactor productivity that have been studied in recent years are described. Percolating reactor configurations and the use of low-cost adsorbents, nanoparticles and micro-aeration seem the most suitable approaches to increase volumetric production and reduce initial capital investment costs.

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Solid-state anaerobic co-digestion of organic fraction of municipal waste and sawdust: impact of co-digestion ratio, inoculum-to-substrate ratio, and total solids

Cited by 17 publications

References 53 publications

Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace

Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace

Impacts of Anaerobic Co-Digestion on Different Influencing Parameters: A Critical Review

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

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