Impact of fulvic acids on bio-methanogenic treatment of municipal solid waste incineration leachate

Dang, Yan; Lei, Yuqing; Liu, Zhao; Xue, Yiting; Sun, Dezhi; Wang, Liying; Holmes, Dawn E.

doi:10.1016/j.watres.2016.09.044

Cited by 100 publications

(18 citation statements)

References 44 publications

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“…The ORP of the reactors were maintained at <0 mV throughout the operational periods. Organic acids were measured with high-performance liquid chromatography (HPLC) as previously described 48 . Total biogas volume in the 2 L-gas-sampling bag was monitored every 24 h with a digital mass flow meter (FMA4000; Omega; USA).…”

Section: Methodsmentioning

confidence: 99%

Significant enhancement of nitrous oxide energy yields from wastewater achieved by bioaugmentation with a recombinant strain of Pseudomonas aeruginosa

Lin

Sun

Dang

et al. 2018

Sci Rep

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Nitrous oxide (N2O) is formed during wastewater nitrogen removal processes. It is a strong greenhouse gas, however, if properly captured it can also be used as a renewable energy source. In this study, a nosZ-deficient strain of Pseudomonas aeruginosa was constructed. During growth under denitrifying conditions, the nosZ-deficient strain was more highly transcribing other genes from the denitrification pathway (narG, nirS, and norB) than the wild-type strain. This strain could also convert 85% of NO2−-N to N2O when it was grown with acetate compared to <0.6% by the wild-type strain. When a bioreactor treating synthetic wastewater with high NO2−-N concentrations (700 mg/L) was inoculated with this strain, the N2O conversion efficiencies were >73% and N2O comprised 73~81% of the biogas being generated. The energy yield from wastewater in bioaugmented reactors also reached levels as high as 1260 kJ/m3. These results are significant and show that bioaugmentation of reactors during denitrification treatment processes with nosZ-deficient strains of Pseudomonas or other core denitrifying bacteria might be an effective way to enhance N2O recovery.

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Section: Methodsmentioning

confidence: 99%

Significant enhancement of nitrous oxide energy yields from wastewater achieved by bioaugmentation with a recombinant strain of Pseudomonas aeruginosa

Lin

Sun

Dang

et al. 2018

Sci Rep

Self Cite

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“…The latter is carried out by interspecies electron transfer (IET), which is an important mechanism for energy exchange, establishing the basis of cooperative behaviors and community functions in a range of anaerobic microbial communities [ 215 ]. As quinone moieties can serve as electron shuttles between the electron-donating and electron-accepting partners, HSs can also shuttle electrons between syntrophic microorganisms [ 216 , 217 ]. In each of these cases, EESs allow the microorganisms at a distance from the terminal electron acceptor to remain metabolically active [ 18 ].…”

Section: Hss As Mediators Of Microbial Redox Reactionsmentioning

confidence: 99%

“…Mitigation of methane emissions by HSs is thought mainly to be caused by stimulating AOM [ 187 , 245 ], but inhibition of methanogens’ growth should also be considered [ 217 , 248 ]. Increasing HS concentrations were demonstrated to inhibit the growth of hydrogenotrophic methanogens from the genus Methanobacterium and syntrophic bacteria from the genus Syntrophomonas , which resulted in a decrease in methane production [ 217 ]. Methanogenesis involves various biological processes requiring complex syntrophic microbial communities, and the overall methanogenesis rate is typically limited by hydrolysis [ 249 ].…”

Section: Nature-like Bioremediation Technologies Based On Hs–microorganism Interactionsmentioning

confidence: 99%

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Куликова

Perminova

2021

Molecules

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The state of the art of the reported data on interactions between microorganisms and HSs is presented herein. The properties of HSs are discussed in terms of microbial utilization, degradation, and transformation. The data on biologically active individual compounds found in HSs are summarized. Bacteria of the phylum Proteobacteria and fungi of the phyla Basidiomycota and Ascomycota were found to be the main HS degraders, while Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes were found to be the predominant phyla in humic-reducing microorganisms (HRMs). Some promising aspects of interactions between microorganisms and HSs are discussed as a feasible basis for nature-like biotechnologies, including the production of enzymes capable of catalyzing the oxidative binding of organic pollutants to HSs, while electron shuttling through the utilization of HSs by HRMs as electron shuttles may be used for the enhancement of organic pollutant biodegradation or lowering bioavailability of some metals. Utilization of HSs by HRMs as terminal electron acceptors may suppress electron transfer to CO2, reducing the formation of CH4 in temporarily anoxic systems. The data reported so far are mostly related to the use of HSs as redox compounds. HSs are capable of altering the composition of the microbial community, and there are environmental conditions that determine the efficiency of HSs. To facilitate the development of HS-based technologies, complex studies addressing these factors are in demand.

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“…Although the effluent aer treatment can meet pollutant emission standards, the membrane treatment inevitably produces large amounts of concentrated leachate, about 20-40% of the total leachate. 1,2 Concentrated leachate is wastewater with high concentrations of organic substances and low biological oxygen demand (BOD 5 )/chemical oxygen demand (COD) ratio. [3][4][5][6] Many investigators have studied the characteristics of concentrated leachates in landlls.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the characteristics of concentrated leachate from six municipal solid waste incineration power plants in China

et al. 2018

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Impact of fulvic acids on bio-methanogenic treatment of municipal solid waste incineration leachate

Cited by 100 publications

References 44 publications

Significant enhancement of nitrous oxide energy yields from wastewater achieved by bioaugmentation with a recombinant strain of Pseudomonas aeruginosa

Significant enhancement of nitrous oxide energy yields from wastewater achieved by bioaugmentation with a recombinant strain of Pseudomonas aeruginosa

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Investigation of the characteristics of concentrated leachate from six municipal solid waste incineration power plants in China

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