Combined pretreatment using CaO and liquid fraction of digestate of rice straw: Anaerobic digestion performance and electron transfer

Guan, Ruolin; Yuan, Hairong; Zhang, Liang; Zuo, Xiaoyu; Li, Xiujin

doi:10.1016/j.cjche.2020.08.036

Cited by 27 publications

(11 citation statements)

References 48 publications

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“…Tissierella was found in AD systems, and the function of this bacteria might be volatile fatty acids, lactate, and CO 2 production. 50,51 Overall, the obtained results of the microbial community composition in R9 explain the rapid process acidification and no CE.…”

Section: ■ Results and Discussionmentioning

confidence: 72%

“…The species has been known as a strict aerobic, ethanol-tolerant acetic acid bacteria, able to oxidize ethanol to acetate, which indicates some oxygen contamination and explains the acetate accumulation in the reactors . About 31–33% of total relative abundance constituted for the Clostridia class, most of which belonged toTissierella genus.Tissierella was found in AD systems, and the function of this bacteria might be volatile fatty acids, lactate, and CO 2 production. , Overall, the obtained results of the microbial community composition in R9 explain the rapid process acidification and no CE.…”

Section: Results and Discussionmentioning

confidence: 74%

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Lactate and Ethanol Chain Elongation in the Presence of Lactose: Insight into Product Selectivity and Microbiome Composition

Duber

Zagrodnik

Gutowska

et al. 2022

ACS Sustainable Chem. Eng.

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Organic waste streams rich in carbohydrates are costly to treat; however, they can be valorized to commodity chemicals such as medium-chain carboxylic acids (MCCAs), for example, caproic acid. Simple carbohydrates are easily fermentable, providing different intermediates for competing bacterial groups, which may lead to product diversification. For that reason, it is essential to understand the impact of sugar fermentation on chain elongation (CE) in the presence of key electron donors to control the biochemical pathways for MCCAs production. The research provides an insight into the impact of co-fermentation of lactose with lactate and ethanol as electron donors on CE and process selectivity in open culture fermentation. Co-fermentation of lactose with ethanol led mostly to acetogenesis and development of the Clostridium genus, while co-fermentation of lactose with solely lactate or with both electron donors activated the propionate production and diversified the process outcome to mix short- and medium-chain carboxylates. The highest caproate production efficiency and selectivity were achieved (53 and 65%, respectively) when lactose in the presence of lactate were used; CE improved with a higher initial lactose load. Interestingly, the microbiome was highly enriched in members of the Bacillaceae family, which was not reported before.

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Section: ■ Results and Discussionmentioning

confidence: 72%

Section: Results and Discussionmentioning

confidence: 74%

Lactate and Ethanol Chain Elongation in the Presence of Lactose: Insight into Product Selectivity and Microbiome Composition

Duber

Zagrodnik

Gutowska

et al. 2022

ACS Sustainable Chem. Eng.

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“…After the addition of GAC, Rikenellaceae and Sphaerochaeta appeared higher in their relative abundances in the HSAD system for R-GAC and R-(GAC + ZVI) compared to the R-control. Moreover, Rikenellaceae and Sphaerochaeta were confirmed to possess DIET capabilities, indicating an enhancement in the electron transfer capacity and methane production in the HSAD system after GAC addition in the HSAD system.…”

Section: Resultsmentioning

confidence: 99%

Adding Granular Activated Carbon and Zerovalent Iron to the High-Solid Anaerobic Digestion System of the Organic Fraction of Municipal Solid Waste: Anaerobic Digestion Performance and Microbial Community Analysis

Zhang,

Yuan,

Zuo

et al. 2024

ACS Omega

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Anaerobic digestion (AD) performance and microbial dynamics were investigated in a high-solid anaerobic digestion (HSAD) system of the organic fraction of municipal solid waste (OFMSW). 1, 5, 10, and 15% (w/w, dry weight of the OFMSW) of granular activated carbon (GAC) and zerovalent iron (ZVI) were added to the HSAD system. The results showed that adding ZVI and GAC can improve the methane yield of the OFMSW. Notably, R-(GAC + ZVI) exhibited the highest cumulative methane yield of 343.0 mL/gVS, which was 57.1% higher than that of the R-control. At the genus level, the dominant bacteria included norank_f__norank_o__MBA03, norank_f__norank_o__norank_c__norank_p__Firmicutes, Fastidiosipila, norank_f__Rikenellaceae, and Sphaerochaeta, while Methanoculleus, Methanobacterium, and Methanosarcina were the dominant archaea. The highest relative abundance of norank_f__norank_o__norank_c__norank_p__Firmicutes was 30.8% for the R-(GAC + ZVI), which was 71.4% higher than that of the R-control. The relative abundance of Methanoculleus and Methanobacterium for the R-(GAC + ZVI) and the R-control group accounted for 79.0 and 90.8% of the total archaeal abundance, respectively. Additionally, the relative abundance of Methanosarcina was 10.6% for R-(GAC + ZVI), which was higher than that of the R-control (1.1%). After the addition of GAC and ZVI, the electron transfer capacity of the HSAD system was enhanced, resulting in promoted methane production. Thus, the simultaneous addition of GAC and ZVI to the HSAD system can be an effective strategy to promote the cumulative methane yield of the OFMSW.

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“…Moreover, Sedimentibacter was reported to proceed interspecies electron and energy exchange via epilin accessory proteins [ 50 ]. Sphaerochaeta species (1% in T72 group and 0.06% in untreated group) could co-culture with methanogens, which may also participate in direct interspecies electron transfer [ 51 ]. Syntrophomonadaceae (2% in T72 group and negligible in the untreated group) have also been reported as an electron-donating partner in interspecies electron transfer [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

et al. 2021

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The corn stover (CS)’s compact structure makes it challenging for microorganisms to use in anaerobic digestion (AD). Therefore, improving CS biodegradability has become a key focus in AD studies. Methods are being targeted at the pretreatment of CS, combining advanced urea with mild temperature hydrotherm pretreatment to study its effect on promoting the AD process of CS. The biomethane yield, physicochemical structure, and microbial community characteristics were investigated. CS samples were assigned into groups differed by a range of pretreatment times (from 24 to 96 h) and set at a temperature of 50 °C with a 2% urea addition. Results revealed that the 72-h group obtained the highest biomethane yield of 205 mL/g VS−1, volatile solid (VS) and total solid (TS) removal rates of 69.3% and 47.7%, which were 36.7%, 25.3% and 27.5% higher than those of untreated one, respectively. After conducting several analyses, results confirmed the pretreatment as a method for altering CS microstructures benefits biomethane production. The most resounding differences between pretreated and untreated groups were observed within a microbial community, an integral factor for improved AD performance. This study serves to confirm that this specific pretreatment is an effective method for enhancing biomethane production in CS.

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Combined pretreatment using CaO and liquid fraction of digestate of rice straw: Anaerobic digestion performance and electron transfer

Cited by 27 publications

References 48 publications

Lactate and Ethanol Chain Elongation in the Presence of Lactose: Insight into Product Selectivity and Microbiome Composition

Lactate and Ethanol Chain Elongation in the Presence of Lactose: Insight into Product Selectivity and Microbiome Composition

Adding Granular Activated Carbon and Zerovalent Iron to the High-Solid Anaerobic Digestion System of the Organic Fraction of Municipal Solid Waste: Anaerobic Digestion Performance and Microbial Community Analysis

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

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