Anaerobic co-digestion of Pennisetum hybrid and pig manure: A comparative study of performance and microbial community at different mixture ratio and organic loading rate

Li, Lianhua; He, Shan; Sun, Yueming; Kang, Xueyan; Jiang, Junfeng; Yuan, Zhenhong; Liu, Dingfa

doi:10.1016/j.chemosphere.2020.125871

Cited by 18 publications

(7 citation statements)

References 44 publications

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“…Bearing these considerations in mind, the data obtained in the present work are comparatively of relevant interest because they indicate that it is possible to obtain a similar production in biogas (energy) and treat a higher volume of effluent in the same period and, at lower process temperature, conditions that will certainly provide an energy balance more attractive for the operating unit. Considering the co-digestion of Pennisetum hybrid and pig manure (50:50) under a mesophilic range of temperature (35 ± 1 • C) [55], the results obtained are comparable to those of this work, although with a lower methane content: biogas production of 1. The variations in biogas volume under HRT 6.7 d (Figure 2) were certainly stressed by the failure to feed the reactor on Sundays.…”

Section: Anaerobic Digestion Of the Bww And Pe Mixturesupporting

confidence: 81%

Complementary Substrates-Brewery Wastewater and Piggery Effluent—Assessment and Microbial Community Profiling in a Hybrid Anaerobic Reactor

2021

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A hybrid anaerobic reactor was operated under the complementary effluents concept to reduce the unbalanced/inhibitory capacity of the provided piggery effluent. Brewery wastewater was chosen to complement piggery effluent (60:40% v/v, respectively). The HRT reduction from 6.7 to 3.0 days allowed the testing of an organic load increase from 4.5 to 10.0 g COD/L·d, which resulted in the almost doubling of biogas production. Biogas volumes (1.2 and 2.1 L/L·d, respectively) associated with its quality (>77% CH4) revealed that the hybrid anaerobic reactor responded positively to the operational changes and that piggery effluent can be advantageously digested using the brewery wastewater as the complementary effluent. The unit bottom and the packing bed were the main functional sections recognized in the hybrid. At the beginning of anaerobic digestion, bacterial populations belonged mostly to Bacteroidales (33%) and Clostridiales (35%). The process stability and the biogas quality at 3-d HRT were related to a change in the structure composition, since Flavobacteriales (18%), Bacillales (7%), Pseudomonadales (11%) and members of the Alcaligenaceae family (5%) also integrated the microbial communities. An evident change had also occurred in archaeal populations at this phase. Methanosaeta became the dominant genus (95%), confirming that acetoclastic methanogenesis was the main way for methane production.

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Section: Anaerobic Digestion Of the Bww And Pe Mixturesupporting

confidence: 81%

Complementary Substrates-Brewery Wastewater and Piggery Effluent—Assessment and Microbial Community Profiling in a Hybrid Anaerobic Reactor

2021

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“…The benefits of including grass in methane concentrations have also been verified by LIANHUA et al (2020) when they co-digested the swine manure with Penninsetum in the proportion of 25:75, respectively, and verified yields 5% higher in this inclusion of forage compared to when only 50% was added. MAO et al (2017) found higher methane yields when it was added 30% of rice straw to the swine manure in anaerobic digestion, compared with the isolated digestion.…”

Section: Methodsmentioning

confidence: 84%

Anaerobic co-digestion of swine manure and forage at two harvesting ages

et al. 2022

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The co-digestion of swine manure with vegetable waste is an alternative that can increase the production of biogas and methane generated by the isolated digestion of manure. However, recommendations that are based on the best ratio between manure and forage, as well as the age of harvest, are still scarce in the literature. This study was conducted to evaluate inclusions (0, 25, 50, 75 and 100%) of the total solids (TS) of Elephant grass (Pennisetum purpureum Schum) harvested at two ages medium age (MA) at 45 days of growth and advanced age (AA) at 90 days in co-digestion with swine manure, using an entirely randomized design in a 5x2 factorial scheme. Batch digesters were used and biogas production was monitored for 12 weeks. There was influence of forage age (P <0.05) on the degradation of solids and neutral detergent fiber, with higher values for the substrates containing MA forage. The highest CH4 yields were obtained by the substrates containing MA forage in the inclusion of 27.7 and 31.6%, being 253.7 and 222.2 L of CH4 per Kg of total or volatile solids. The age of the forages influenced the onset and persistence of biogas production, being advantageous only in the inclusion of 25% of MA forage. The AA forage inclusion is not recommended for co-digestion with swine manure.

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“…The methods employed for measuring the content of TS, VS, elemental C, elemental N, pH, total ammonia nitrogen (TAN), volatile fatty acids (VFAs, including butyric acid (Ba), propionic acid (Pa), and acetic acid (Aa)), alkalinity (intermediate alkalinity (IA), partial alkalinity (PA), and total alkalinity (TA)), and CH 4 were described in a previous study [28,29].…”

Section: Methodsmentioning

confidence: 99%

“…Samples for determining the microorganism communities during co-digestion were collected on days 13 (GM11-2 and GM31-2), 51 (GM11-2.5 and GM31-2.5), 83 (GM11-3.5 and GM31-3.5), 112 (GM11-4 and GM31-4), 144 (GM11-4.5 and GM31-4.5), 172 (GM11-5 and GM31-5), 198 (GM11-5.5 and GM31-5.5), and 235 (GM11-6 and GM31-6) at OLRs of 2.0, 2.5, 3.5, 4.0, 4.5, 5.0, 5.5, and 6.0 g VS/(L•d), respectively. DNA extraction, polymerase chain reaction amplification, and phylogenetic analysis were performed as described previously [29].…”

Section: Analytical Methods For Microbial Communitiesmentioning

confidence: 99%

“…The operating temperature of the reactor was 37 ± 0.5 • C, and the semi-continuous mode was used [21,28]. Previous studies showed that Pennisetum hybrid co-digested with pig or cow manure increased the stable operational OLRs to 4.5-6.0 g VS/(L•d) [28,29]. On the basis of our previous studies, two hybrid Pennisetum: MSW ratios were used: 50:50 (GM11) and 75:25 (GM31).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

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Links between Process Performance and Microbial Community of Pennisetum Hybrid Co-Digested with Municipal Solid Waste

Zhao

et al. 2021

Energies

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In this study, the links between performance and microbial communities were investigated with municipal solid waste (MSW) at two feedstock ratios and eight organic loading rates (OLRs). The co-digestion systems were stably operated at OLRs of 2.0–6.0 g VS/(L·d). The performance of the co-digestion system varied with the feedstock ratio. Compared with the 50:50 (hybrid Pennisetum:MSW) system, the 75:50 system, GM31, obtained increases of 1.93–17.68% and 0.29–23.29% for the specific biogas and methane yields, respectively. Whereas a shift in bacterial and methanogen communities occurred as the operating conditions changed, particularly with OLR variations. The genera Saccharofermentans, Prevotella, Clostridium, Syntrophomonas, and Proteiniphilum became the dominant bacteria for the conversion of carbohydrates and nitrogen compounds as the OLR increased. Meanwhile, a shift from acetoclastic to hydrogenotrophic or multifunctional methanogens was observed.

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Anaerobic co-digestion of Pennisetum hybrid and pig manure: A comparative study of performance and microbial community at different mixture ratio and organic loading rate

Cited by 18 publications

References 44 publications

Complementary Substrates-Brewery Wastewater and Piggery Effluent—Assessment and Microbial Community Profiling in a Hybrid Anaerobic Reactor

Complementary Substrates-Brewery Wastewater and Piggery Effluent—Assessment and Microbial Community Profiling in a Hybrid Anaerobic Reactor

Anaerobic co-digestion of swine manure and forage at two harvesting ages

Links between Process Performance and Microbial Community of Pennisetum Hybrid Co-Digested with Municipal Solid Waste

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