Optimizing dry anaerobic digestion at pilot scale for start-up strategy and long-term operation: Organic loading rate, temperature and co-digestion

Gong, Hui; Liu, Min; Li, Kun; Li, Caibin; Xu, Guodong; Wang, Kaijun

doi:10.1016/j.biortech.2020.123828

Cited by 29 publications

(4 citation statements)

References 29 publications

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“…These reducing equivalents can contribute to lowering oxidizing agents in the system, causing a decrease in ORP. Furthermore, biohydrogen production during dark fermentation can contribute to the reduction of oxidizing agents in the system, which also leads to a decline in ORP (62). In our experiments, it was observed that during the first 100 hours of the reactor, when H2 and CH4 production was minimal (Figure 5), the average ORP and pH values were -360.8±50.2 mV and 5.4±1.1, respectively.…”

Section: Microbial Community Analysismentioning

confidence: 61%

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Silva-Martínez,

Aguilar-Juárez,

Díaz-Jiménez

et al. 2024

Preprint

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Background Biohydrogen production from the organic fraction of municipal solid waste (OFMSW) in co-digestion with sewage sludge (SS) through dark fermentation (DF) is emerging as an alternative route for efficient waste treatment and biofuel production. Notwithstanding, there is little experience with a high-solid approach, where practical conditions are created to further develop feasible industrial-scale projects. This study conducted a biochemical hydrogen potential test using a 7L batch reactor at 35°C for 39 days. Parameters such as pH, redox potential, temperature, alkalinity, total solids, and substrate/inoculum ratio were adjusted and monitored. Biogas composition was analyzed by gas chromatography. The microbial characterization of SS and post-reaction percolate liquids was determined through metagenomics analyses. Results Results demonstrate an initial biohydrogen yield of 38.4 Nml/gVS OFMSW, which forms ~ 60% of the produced biogas. Aeration was proven as an efficient inoculum pretreatment method, mainly to decrease the levels of methanogenic archaea and metabolic competition, and at the same time maintain the required total solid (TS) contents for high-solid conditions. The microbial community analysis shows that the biohydrogen production was carried out by specific anaerobic and aerobic bacteria and dominated by the phylum Firmicutes such as the genus Bacillus, Clostridium, Romboutsia; and the phylum Proteobacteria with the genus Proteus. Conclusion These results aid in setting the base ground to further develop the technology and design a larger bioreactor for DF of OFMSW in co-digestion with SS, considering diverse parameters, the manufacturing process, and instrumentation. Thus, this research provides an alternative solution for OFMSW treatment and biohydrogen production and expects to serve as a basis for future research, which may intend to improve biochemical conditions to increase the amount of hydrogen produced, optimize biodegradation and, at the same time, develop an industrial high-solid dark fermentation system that is technically and economically viable.

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Section: Microbial Community Analysismentioning

confidence: 61%

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Silva-Martínez,

Aguilar-Juárez,

Díaz-Jiménez

et al. 2024

Preprint

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“…Several treatment technologies and approaches have been proposed to address this issue, including constructing a bioreactor with easily biodegradable influent and pH buffering additives (Zhang et al 2018b ). To compensate for the pH drop, co-digestion with a substrate with a high buffering capacity has been employed (Gong et al 2020 ). However, it remains a significant challenge to establish a stable, simple, and cost-effective strategy for developing the buffering capability of anaerobic digestion systems.…”

Section: Anaerobic Digestionmentioning

confidence: 99%

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

et al. 2022

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In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.

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“…Basic information of substrate, inoculum and BS is listed in Tab 1. AD category in this study is dry system (> 15% TS) (Gong et al, 2020).…”

Section: Substrate Inoculum and Bioaugmentation Culturementioning

confidence: 99%

Effect of Bioaugmentation by Using Cow Manure Microbial Consortium on Microbial Communities for Treating Food Waste with Anaerobic Digestion

Fahmi¹

2021

Proceedings of ‏The 7th International Conference on Modern Approaches in Science, Technology &Amp; Engineering

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The number of microorganisms is the key factor affecting biodegradation capacity for anaerobic digestion (AD). Bioaugmentation strategy using an enriched culture has been known give supplementary microorganisms and consequently improve the AD performance, however bioaugmentation using a microbial consortium without enrichment for treating food waste (FW) is unknown. In the present study investigated whether bioaugmentation can improve the AD performance of FW, as well as the effect of addition microbial consortium on the microbial community. This pilot scale study using stirrer-less reactors made of LLDPE, with the total and effective volume of 462 L and 369 L, respectively. Bioaugmentation seed (BS) was a cow manure microbial consortium collected from slaughterhouse in Curug, Depok and the frequency of bioaugmentation was performed in every three days. The microbial community was examined using metagenomic next-generation sequencing (NGS). The effect of bioaugmentation using BS without enrichment was revealed as well. Findings demonstrated that effectively increase biogas production (201 L/day) and methane yield (546 L/kg VSadded), compared to non-bioaugmentation (66 L/day) and (296 L/kg VSadded). The increased biogas production and methane yield shows the feasibility of applying cow manure (CM) for bioaugmentation in AD of FW. Furthermore, NGS analysis showed that BS enhanced the population of Methanosarcina and Methanosaeta. The abundance at 17.29% and 11.29%, respectively. The higher Methanosarcina and Methanosaeta indicate the acetoclastic pathway was dominant on methanogenesis. The success of bioaugmentation using CM depends on environmental factors suitable for microbial life.

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Optimizing dry anaerobic digestion at pilot scale for start-up strategy and long-term operation: Organic loading rate, temperature and co-digestion

Cited by 29 publications

References 29 publications

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Effect of Bioaugmentation by Using Cow Manure Microbial Consortium on Microbial Communities for Treating Food Waste with Anaerobic Digestion

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