Enhanced methane production by semi-continuous mesophilic co-digestion of potato waste and cabbage waste: Performance and microbial characteristics analysis

Mu, Hui; Zhao, Chunhui; Zhao, Yuxiao; Li, Yan; Hua, Dongliang; Zhang, Xiaodong; Xu, Haipeng

doi:10.1016/j.biortech.2017.03.138

Cited by 58 publications

(25 citation statements)

References 34 publications

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“…The final DNA concentrations were determined by NanoDrop 2000 UV-vis spectrophotometer (Thermo Scientific, USA), and DNA quality was checked by 1% agarose gel electrophoresis. Primers for bacteria were 338 F (5′-ACTCC TACGG GAGGC AGCAG-3′) and 806R (5′-GGACT ACCAG GGTAT CTAAT-3′) 51 , 52 , and those for archaea were Arch344F (5′-ACGGG GYGCA GCAGG CGCGA-3′) and Arch915R (5′-GTGCT CCCCC GCCAA TTCCT-3′) 17 , 53 . All PCR reactions were performed in triplicate 20 μL mixtures containing 4 μL of 5 × FastPfu Buffer, 2 μL of 2.5 mM dNTPs, 0.8 μL of each primer (5 μM), 0.4 μL of FastPfu Polymerase (TransGen AP221-02, TransGen Biotech, China), 0.2 μL of BSA, 10 ng of template DNA, and ddH 2 O to a final volume of 20 μL.…”

Section: Methodsmentioning

confidence: 99%

Investigation of foaming causes in three mesophilic food waste digesters: reactor performance and microbial analysis

Zhao

et al. 2017

Sci Rep

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Foaming negatively affects anaerobic digestion of food waste (FW). To identify the causes of foaming, reactor performance and microbial community dynamics were investigated in three mesophilic digesters treating FW. The digesters were operated under different modes, and foaming was induced with several methods. Proliferation of specific bacteria and accumulation of surface active materials may be the main causes of foaming. Volatile fatty acids (VFAs) and total ammonia nitrogen (TAN) accumulated in these reactors before foaming, which may have contributed to foam formation by decreasing the surface tension of sludge and increasing foam stability. The relative abundance of acid-producing bacteria (Petrimonas, Fastidiosipila, etc.) and ammonia producers (Proteiniphilum, Gelria, Aminobacterium, etc.) significantly increased after foaming, which explained the rapid accumulation of VFAs and NH4 + after foaming. In addition, the proportions of microbial genera known to contribute to foam formation and stabilization significantly increased in foaming samples, including bacteria containing mycolic acid in cell walls (Actinomyces, Corynebacterium, etc.) and those capable of producing biosurfactants (Corynebacterium, Lactobacillus, 060F05-B-SD-P93, etc.). These findings improve the understanding of foaming mechanisms in FW digesters and provide a theoretical basis for further research on effective suppression and early warning of foaming.

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Section: Methodsmentioning

confidence: 99%

Investigation of foaming causes in three mesophilic food waste digesters: reactor performance and microbial analysis

Zhao

et al. 2017

Sci Rep

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“…Potato waste generated the fourth highest biogas yield of all substrates tested; a possible explanation for this is its C/N ratio. The C/N ratio of potato waste is approximately 26 which falls within the optimal ratio for biogas production (Kryvoruchko et al, 2009;Mu et al, 2017).…”

Section: Accepted Manuscriptmentioning

confidence: 83%

“…Potato peels comprised a relatively low CH 4 content (52.3%) producing an ultimate CH 4 yield of 331±2.5 mL/g VSfeedstock. This could be explained by its high starch composition which is easily converted to VFAs and CO 2 but not further to CH4 (Mu et al, 2017).…”

Section: E Fruit and Vegetable Wastementioning

confidence: 99%

Evaluation of anaerobic digestibility of energy crops and agricultural by-products

Spence

Madrigal²,

Patil³

et al. 2019

Bioresource Technology Reports

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Abundant wastes from the food and drink supply chain are valuable and infrequently used as anaerobic digestion (AD) substrates. This study quantifies their biomethane potential to contribute to solid waste reduction and energy production. 29 organic materials were evaluated: energy crops (6), pre-treated agricultural by-products (5), livestock slurries (3), agro-industrial wastes (7), fruit and vegetable wastes (4) and codigestion mixtures of chicken litter (CL) and fruit wastes (4). Results showed highest biogas yields for rendered fat washings (1379 ± 125 mL/g VS feedstock), fish waste (898 ± 107 mL/g VS feedstock) and potato waste (768 ± 27 mL/g VS feedstock). Synergistic benefits of co-digestion were evidenced. CL (20%) with avocado pulp (80%) led to 84% higher biogas than expected from contribution of single substrates.

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“…The BMP assay was carried out at an exact temperature with a particular quantity of methanogenic inoculum, and the biogas production was observed until it was insignificant. Recently, BMP assays were carried out utilising the Automatic Methane Potential Test System (AMPTS II) for rapid and accurate online measurements in conducting batch BMP assays [15].…”

Section: Introductionmentioning

confidence: 99%

Energy Recovery from Anaerobic Digestion of Banana Peels

Shaharoshaha¹,

Sulaiman²,

Seswoya³

2019

IJRTE

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Bananas are tropical fruits mostly eaten in Malaysia. The banana peels are high in organic, and putrescible caused the odour and leachate problem where it has been a dump. In practice, banana peels considered as a waste product that has been combined with municipal solid waste and dumped into the landfills. However, banana peels are bountiful in organic matter and high with moisture content. Thus, it could be a convincing substrate for biogas production through anaerobic digestion so that the major concerns of environmental protection is achieved aside from producing energy in a sustainable way. Therefore, this study was initiated to estimate the ultimate methane yield from the unripe banana peel (UBP) and ripe banana peel (RBP). Besides that, the assessment on the kinetics of the methane production from UBP and RBP is conducted using Modified Gompertz and first-order kinetic modelling. In this study, the anaerobic digestibility of banana peels measured in a batch reactor for 25 days each fed by UBP and RBP. The batch reactors operated at an inoculum to substrate ratio (I/S) of 1.0 and at a mesophilic temperature (37°C). The ultimate methane yields from UBP and RBP digestion were 847.57mLCH4 /gVS and 1405.31mLCH4 /gVS, respectively. The higher bioavailability (in term of COD, and solid) in RBP resulted in the higher methane production rate. Two first-order and modified Gompertz kinetic models were compared for the prediction of organic degradation, and the results indicated that the first-order kinetic model of the RBP fitted the experiment best. It concluded that ripe banana peels are the most preferable feedstock for the anaerobic digestion.

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Enhanced methane production by semi-continuous mesophilic co-digestion of potato waste and cabbage waste: Performance and microbial characteristics analysis

Cited by 58 publications

References 34 publications

Investigation of foaming causes in three mesophilic food waste digesters: reactor performance and microbial analysis

Investigation of foaming causes in three mesophilic food waste digesters: reactor performance and microbial analysis

Evaluation of anaerobic digestibility of energy crops and agricultural by-products

Energy Recovery from Anaerobic Digestion of Banana Peels

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