Anaerobic co-digestion of kitchen waste with hyperthermophilically pretreated grass for biohydrogen and biomethane production

Liczbiński, Przemysław; Borowski, Sebastian; Cieciura-Włoch, Weronika

doi:10.1016/j.biortech.2022.128053

Cited by 18 publications

(5 citation statements)

References 45 publications

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“…However, Coprothermobacteraceae was only found at 47 (20%) and 53 • C (43%), but not at lower temperatures. This is in line with previous studies, detecting the family in thermophilicbut not at mesophilic conditions [68,69] and corresponds well with [70], who reported growth until 75 • C with an optimum at 63 • C. While originally being assigned to Firmicutes, Coprothermobacteraceae now belongs to the new phylum Coprothermobacterota, which was introduced in 2018 [71]. Coprothermobacter (formerly named Thermobacteroides), as the most important representative, is an important SAOB [72], fermenting sugars and proteins to produce acetate, H 2 and CO 2 [73].…”

Section: Bacterial Taxonomysupporting

confidence: 93%

“…However, Coprothermobacteraceae was only found at 47 (20%) and 53 °C (43%), but not at lower temperatures. This is in line with previous studies, detecting the family in thermophilic-but not at mesophilic conditions [68,69] and corresponds well with [70], who reported growth until 75 °C with an optimum at 63 °C. While originally being assigned to Firmicutes, Coprothermobacteraceae now belongs to the new phylum For lab digesters operated at 43 and 47 • C, Family XI (Clostridiales) was revealed as the indicator family.…”

Section: Bacterial Taxonomysupporting

confidence: 93%

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Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Steiniger,

Hupfauf,

Insam

et al. 2023

Fermentation

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Digesters at water resource recovery facilities (WRRFs) operating at different temperatures within the mesophilic and thermophilic temperature range is a flexibilization concept to contribute to heat management. Four 25 L digesters were fed with sewage sludge from a municipal WRRF and were operated at 37, 43, 47 and 53 °C, respectively, to describe changes in the overall process performance and the microbiota. Specific methane yield and COD degradation rates were the highest at 47 °C, only being up to 7% higher compared with at 37 °C. The increase in pH and concentrations of NH4-N and PO4-P above 43 °C were statistically significant. The effect on the microbial community was strong, indicating both a constant specialization towards thermophilic organisms as well as a change from acetoclastic to hydrogenotrophic/methylotrophic methanogenesis. The influence of temperature on process-engineering and physicochemical aspects was rather small compared with the changes in the microbiota.

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Section: Bacterial Taxonomysupporting

confidence: 93%

Section: Bacterial Taxonomysupporting

confidence: 93%

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Steiniger,

Hupfauf,

Insam

et al. 2023

Fermentation

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show abstract

“…The TVFA/TA (Figure 3c,d) showed that all digesters were stable. The levels of TVFA/TA in this paper do not differ much from the other literature, and the reactor gradually becomes stabilized after a period of time from the beginning of the reaction [38]. During anaerobic digestion, the equilibrium relationship between organic acids and alkaline substances produced by microorganisms significantly affects the TVFA/TA ratio [3].…”

Section: F) the Fan Of T-m0 T-m5 T-m10 T-m15 And T-m20mentioning

confidence: 45%

Comparison of Thermophilic–Mesophilic and Mesophilic–Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity

Wang,

et al. 2023

Microorganisms

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This study investigated the performance of thermophilic–mesophilic (T-M) and mesophilic–thermophilic (M-T) two-phase sludge anaerobic digestion at different inoculation proportions after a change in digestion temperature. After temperature change, the pH, total ammonia nitrogen (TAN), free ammonia nitrogen (FAN), solubility chemical oxygen demand (SCOD), and total alkalinity (TA) levels of two-phase digesters were between thermophilic control digesters and mesophilic control digesters. However, the volatile fatty acid (VFA) levels of two-phase digesters were higher than those of thermophilic or mesophilic control digesters. The bacteria communities of M-T two-phase digesters were more diverse than those of T-M. After a change in digestion temperature, the bacterial community was dominated by Coprothermobacter. After a change of digestion temperature, the relative abundance (RA) of Methanobacterium, Methanosaeta, and Methanospirillum of M-T two-phase digesters was higher than that of T-M two-phase digesters. In comparison, the RA of Methanosarcina of T-M two-phase digesters was higher than that of M-T two-phase digesters. The ultimate methane yields of thermophilic control digesters were greater than those of mesophilic control digesters. Nevertheless, the ultimate methane yield levels of M-T two-phase digesters were greater than those of T-M two-phase digesters. The ultimate methane yields of all two-phase digesters presented an earlier increase and later decrease trend with the increasing inoculation proportion. Optimal methane production condition was achieved when 15% of sludge (T-M15) was inoculated under mesophilic–thermophilic conditions, which promoted 123.6% (based on mesophilic control) or 27.4% (based on thermophilic control). An optimal inoculation proportion (about 15%) balanced the number and activity of methanogens of high-solid sludge anaerobic digestion.

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“…Secondly, a statistical analysis was not conducted since the reactors were not replicated. However, replicates in studies addressing semi-continuous anaerobic digestion tests are not common in the literature (Liczbiński et al, 2022;Zhu et al, 2022) because these experiments are labor-intensive, very time-consuming, and expensive. Nevertheless, it would be useful to design at least two or three replicates per type of process in future tests.…”

Section: Limitations Of the Present Studymentioning

confidence: 99%

Boosting the circularity of waste management: pretreated mature landfill leachate enhances the anaerobic digestion of market waste

2023

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Adequate waste management is essential not only to ensure healthy living conditions but also to mitigate climate change. Accordingly, the research on developing strategies to boost the circularity of waste management systems is ongoing. In this context, two waste streams are concurrently managed to recover energy and materials in the present study. Specifically, real leachate collected from a full-scale mature landfill site was preliminarily treated through active filtration to remove inhibitory substances partially and then tested, at the laboratory scale, as a nutrient solution for semi-continuous anaerobic digestion of a carbonaceous substrate represented by market waste. The results demonstrate that, at an organic loading rate of 1.0 gVS∙L-1∙d-1, the process was impossible without using the nutrient solution, while the nitrogen present in the pretreated leachate could balance the carbon content of the market waste and provide the system with the necessary buffering capacity, ensuring process stability. The average methane yield (approximately 0.29 NL∙gVS-1) was satisfactory and consistent with the literature. Despite the increases in both the organic loading rate (up to 1.5 gVS∙L-1∙d-1) and volume of added pretreated leachate (up to 100% of the dilution medium), the process remained stable with a slightly lower methane yield of 0.21 NL∙gVS-1, thanks to nitrogen supplementation. The potential use of produced methane as a renewable energy source and residual digestate as fertilizer would close the loop of managing these waste streams.

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Anaerobic co-digestion of kitchen waste with hyperthermophilically pretreated grass for biohydrogen and biomethane production

Cited by 18 publications

References 45 publications

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Comparison of Thermophilic–Mesophilic and Mesophilic–Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity

Boosting the circularity of waste management: pretreated mature landfill leachate enhances the anaerobic digestion of market waste

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