Enhancing anaerobic digestion of cotton stalk by pretreatment with a microbial consortium (MC1)

Yuan, Xufeng; Ma, Lei; Wen, Bin; Zhou, Dayun; Kuang, Meng; Yang, Weiben; Cui, Zongjun

doi:10.1016/j.biortech.2016.02.037

Cited by 112 publications

(27 citation statements)

References 24 publications

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“…Rumen fluid was found to be effective in increasing the yield from rapeseed stems and leaves by 47% within 24 h of treatment time [160]. Yuan et al [19] used a thermophilic microbial consortium MC1 to pretreat the cotton stalk. The results indicated that the concentrations of soluble chemical oxygen demand and volatile organic products increased significantly in the early stages of the pretreatment, reaching the maximum methane yield of 128 mL/g VS after 6 days of MC1 pretreatment.…”

Section: Biological Pretreatmentsmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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Lignocellulosic biomass is recalcitrant due to its heterogeneous structure, which is one of the major limitations for its use as a feedstock for methane production. Although different pretreatment methods are being used, intermediaries formed are known to show adverse effect on microorganisms involved in methane formation. This review, apart from highlighting the efficiency and limitations of the different pretreatment methods from engineering, chemical, and biochemical point of views, will discuss the strategies to increase the carbon recovery in the form of methane by way of amending pretreatments to lower inhibitory effects on microbial groups and by optimizing process conditions.

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Section: Biological Pretreatmentsmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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“…Also, cattle rumen content was collected from the slaughter slab of Landmark University within a 50 m distance and used as inoculum in order to have adequate microbial flora in the digestion system. The use of microbial consortia in anaerobic digestion processes is well documented (Dahunsi et al, 2016a, b;Yuan et al, 2016). Considering the high lignin content of the peels, and the quest to overcome the ratelimiting challenge often encountered during the hydrolysis step of anaerobic digestion, pretreatments were applied.…”

Section: Collection Of Samplementioning

confidence: 99%

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Dahunsi

Oranusi

Efeovbokhan

2017

Journal of Cleaner Production

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In this study, the potentials of pretreated and untreated Carica papayas fruit peels for biogas generation was evaluated alongside its process optimization after employing the combination of mechanical and thermo-alkaline pretreatment methods. The peel was anaerobically digested using a consortium of microorganisms from cattle rumen content as inoculum. A batch system designed by the Central Composite Design (CCD) was employed. The physicochemical and microbial characteristics of the substrates and inoculum as well as the constituent of the generated biogas were evaluated using standard methods and results showed elevated levels of most elements after anaerobic digestion. The most feasible experimental biogas yields were 0.1839 m 3 /kg VS and 0.1361 m 3 /kg VS for the pretreated and untreated experiments respectively. Microbiologically, members of the genus Clostridium dominated the microbial flora and their succession patterns were affected by temperature and pH. The methane and carbon dioxide content of biogas from both experiments were 61.5± 2.5%; 24± 1% and 52 ± 2%; 25± 1.5% respectively. The Response Surface Methodology (RSM) and the Artificial Neural Networks (ANNs) were employed in data optimization. Based on the optimized values, the predicted biogas yield for RSM was 0.1895 m 3 /kg VS and 0.1839 m 3 /kg VS for ANNs in the pretreated experiment. For the experiment without pretreatment, the RSM predicted yield was 0.1361 m 3 /kg VS while that of ANNs was 0.1392 m 3 / kg VS. In all, there was a 26.5% increase in predicted biogas yield in the pretreated experiment over the untreated. Further usage of pawpaw peels for biofuels generation is advocated.

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“…Singh et al (2014) co-cultured Pichia stipitis and Z. mobilis for bioethanol production from kans grass biomass with significant yields and Zhang et al (2016a) employed C. cellulolyticum and hydrogen fermentation bacteria for enhanced biohydrogen production from corn stover with significant differences seen in the metabolites of the co-culture system over the mono-cultures. Other reports of successful bio-catalysis based on microbial consortia have equally been reported (Fu et al, 2009;He et al, 2011;Ho et al, 2011;Li et al, 2011;Quinn et al, 2016;Reddy and Basappa, 1996;Yaun et al, 2016;Zhang et al, 2016b;Zhong et al, 2016).…”

Section: Introductionmentioning

confidence: 90%

Engineered microbial consortium for the efficient conversion of biomass to biofuels: A preliminary study

Anieto¹

2017

Afr. J. Microbiol. Res.

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This work showed ethanol production by a microbial consortium of Clostridium cellulolyticum and a recombinant Zymomonas mobilis (ZM4 pAA1). The ZM4 pAA1 and wild type ZM4 (ZM4 WT) were first tested on RM medium (ATCC 1341) containing 2% cellobiose as the carbon source. Ethanol production from ZM4 pAA1 was three times higher than that observed from the ZM4 WT. Concomitant with ethanol production was the reduction in OD from 2.00 to 1.580. The ZM4 pAA1 was then co-cultured with C. cellulolyticum using cellobiose and microcrystalline cellulose , respectively, as carbon sources. Results indicate that the ZM4 pAA1 with C. cellulolyticum utilized 2.0 g/L cellobiose, producing as much as 0.40 mM of ethanol, whereas only 0.20 mM ethanol was detected for the ZM4 WT co-cultured with C. cellulolyticum under similar conditions. A consortium of the ZM4 pAA1 and C. cellulolyticum using 7.5 g/L microcrystalline cellulose gave a far lower ethanol yi eld than when using cellobiose. In the latter case, ethanol production was detected within 5 days, whereas it took about 10 days for ethanol to be detectable for the ZM4 WT and C. cellulolyticum. Future efforts will concentrate on identifying suitable partners for the ZM4 pAA1, the correct concentration of feedstocks at which synergy will be observed, as well as optimize medium formulations and inoculation techniques.

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Enhancing anaerobic digestion of cotton stalk by pretreatment with a microbial consortium (MC1)

Cited by 112 publications

References 24 publications

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Engineered microbial consortium for the efficient conversion of biomass to biofuels: A preliminary study

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