Effects of citrus peel biochar on anaerobic co-digestion of food waste and sewage sludge and its direct interspecies electron transfer pathway study

Jiang, Qin; Chen, Yongdong; Yu, Shangke; Zhu, Ruilin; Zhong, Cheng; Zou, Huijing; Gu, Li; He, Qiang

doi:10.1016/j.cej.2020.125643

Cited by 79 publications

(11 citation statements)

References 57 publications

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“…Interestingly, the biofilm developed on the GAC had a remarkable presence of electrotrophic methanogenic archaea, especially Methanolinea and Methanosaeta (Figure 7). Both Methanolinea and Methanosaeta are reported as syntrophic partners of Geobacter (Jiang et al, 2020; Lee et al, 2016; Mei et al, 2018; Yang et al, 2019). Looking closely at the organisms enriched in the reactor, Geobacter and Methanosaeta were identified to perform DIET using pili to shuttle electrons (Venkiteshwaran et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

et al. 2022

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This study investigated the potential of granular activated carbon (GAC) supplementation to enhance anaerobic degradation of dairy wastewater. Two sequential batch reactors (SBRs; 0.8 L working volume), one control and another amended with GAC, were operated at 37°C and 1.5–1.6 m/h upflow velocity for a total of 120 days (four cycles of 30 days each). The methane production at the end of each cycle run increased by about 68%, 503%, 110%, and 125% in the GAC‐amended SBR, compared with the Control SBR. Lipid degradation was faster in the presence of GAC. Conversely, the organic compounds, especially lipids, accumulated in the absence of the conductive material. In addition, a reduction in lag phase duration by 46%–100% was observed at all four cycles in the GAC‐amended SBR. The peak methane yield rate was at least 2 folds higher with GAC addition in all cycles. RNA‐based bacterial analysis revealed enrichment of Synergistes (0.8% to 29.2%) and Geobacter (0.4% to 11.3%) in the GAC‐amended SBR. Methanolinea (85.8%) was the dominant archaea in the biofilm grown on GAC, followed by Methanosaeta (11.3%), at RNA level. Overall, this study revealed that GAC supplementation in anaerobic digesters treating dairy wastewater can promote stable and efficient methane production, accelerate lipid degradation and might promote the activity of electroactive microorganisms.

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Section: Discussionmentioning

confidence: 99%

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

et al. 2022

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“…Wu et al (2015) found that the dosage of potassium (K), magnesium (Mg), and manganese (Mn) accelerated the digestion of kitchen waste, with optimal micro-metal additions of 720.2 mg of K, 47.3 mg of Mg, and 11.6 mg of Mn per g of COD. Jiang et al (2020b) found that when citrus biochar at 1.5 g/g VS was used as solid additive, the methanogenic lag time was reduced to 3.5 days and the specific methane production rate was increased by 33.0%. Jiang et al (2020a) used bioaugmentation to increase the population of archaea, and the volumetric biogas production (VBP) increased 12-fold compared to the control group in optimal conditions of 0.25 g/(L-d) per three-day dosing.…”

Section: Additivesmentioning

confidence: 99%

Anaerobic digestion and recycling of kitchen waste: a review

et al. 2022

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About 1.6 billion tons of food are wasted worldwide annually, calling for advanced methods to recycle food waste into energy and materials. Anaerobic digestion of kitchen waste allows the efficient recovery of energy, and induces low-carbon emissions. Nonetheless, digestion stability and biogas production are variables, due to dietary habits and seasonal diet variations that modify the components of kitchen waste. Another challenge is the recycling of the digestate, which could be partly solved by more efficient reactors of anaerobic digestion. Here, we review the bottlenecks of anaerobic digestion treatment of kitchen waste, with focus on components inhibition, and energy recovery from biogas slurry and residue. We provide rules for the optimal treatment of the organic fraction of kitchen waste, and guidelines to upgrade the anaerobic digestion processes. We propose a strategy using an anaerobic dynamic membrane bioreactor to improve anaerobic digestion of kitchen waste, and a model for the complete transformation and recycling of kitchen waste, based on component properties.

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“…Besides, improvement in the methane yield has been also repeatedly reported and verified with other conductive materials, such as graphite ( Tan et al, 2015 ), magnetite ( Ye et al, 2018 ), and carbon cloth ( Zhao et al, 2017c ). Studies showed that the increase in methane yield is mainly because that DITE mediated by conductive materials facilitated the conversion of interspecies metabolites to methane ( Tian et al, 2017 ; Jiang et al, 2020 ; Sun et al, 2020 ).…”

Section: Improvements Of Anaerobic Digestion Performancesmentioning

confidence: 99%

Improvement of Direct Interspecies Electron Transfer via Adding Conductive Materials in Anaerobic Digestion: Mechanisms, Performances, and Challenges

Fang

Chang

et al. 2022

Front. Microbiol.

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Anaerobic digestion is an effective and sustainable technology for resource utilization of organic wastes. Recently, adding conductive materials in anaerobic digestion to promote direct interspecies electron transfer (DIET) has become a hot topic, which enhances the syntrophic conversion of various organics to methane. This review comprehensively summarizes the recent findings of DIET mechanisms with different mediating ways. Meanwhile, the influence of DIET on anaerobic digestion performance and the underlying mechanisms of how DIET mediated by conductive materials influences the lag phase, methane production, and system stability are systematically explored. Furthermore, current challenges such as the unclear biological mechanisms, influences of non-DIET mechanisms, limitations of organic matters syntrophically oxidized by way of DIET, and problems in practical application of DIET mediated by conductive materials are discussed in detail. Finally, the future research directions for practical application of DIET are outlined.

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Effects of citrus peel biochar on anaerobic co-digestion of food waste and sewage sludge and its direct interspecies electron transfer pathway study

Cited by 79 publications

References 57 publications

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

Anaerobic digestion and recycling of kitchen waste: a review

Improvement of Direct Interspecies Electron Transfer via Adding Conductive Materials in Anaerobic Digestion: Mechanisms, Performances, and Challenges

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