Key microbial populations involved in anaerobic degradation of phenol and p-cresol using different inocula

Franchi, Óscar; Rosenkranz, Francisca; Chamy, Rolando

doi:10.1016/j.ejbt.2018.08.002

Cited by 59 publications

(24 citation statements)

References 33 publications

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“…However, hydrolytic and acidogenic bacteria prefer pH values within the range of 5.5-6.5. The pH of the digester influences the degradation of organic matter, as fluctuations cause disturbances in the microbial activities and the subsequent metabolomics pathways [45][46][47]. Low pH values can significantly inhibit the reactor operation and subsequently, the digester comes to a 'sour' situation.…”

Section: Ph and Alkalinitymentioning

confidence: 99%

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Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Achinas

Euverink

2019

Energies

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The goal of this research was to appraise the effect of combined inoculation on the performance of anaerobic digesters treating hardly degradable material, and particularly the pressed fine sieved fraction (PFSF) derived from wastewater treatment plants (WWTPs). Batch tests were conducted in mesophilic conditions in order to examine the optimal mixing ratio of inoculums. Mixing ratios of 100:0, 75:25, 50:50, 25:75, and 0:100 of three different inoculums were applied in the batch tests. The findings indicated that the inoculation of digested activated sludge with digested organic fraction of municipal solid waste (MSW) in the ratio 25:75 resulted in a higher PFSF degradation and a higher biogas yield. The results from the kinetic analysis fit well with the results from the batch experiment.

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Section: Ph and Alkalinitymentioning

confidence: 99%

“…Low pH values can significantly inhibit the reactor operation and subsequently, the digester comes to a 'sour' situation. This is ascribed to the production and accumulation of volatile fatty acids (VFA) in the initial phase of anaerobic digestion [45][46][47][48].…”

Section: Ph and Alkalinitymentioning

confidence: 99%

Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Achinas

Euverink

2019

Energies

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“…Phenolic compounds damage the cell membrane which adversely affects membrane proteins and cell wall permeability (Madigou et al, 2016). A recent study has summarized that selection of key microbial populations would help improve the removal of refractory pollutants including phenol and p-cresol (Franchi et al, 2018).…”

Section: Apl Propertiesmentioning

confidence: 99%

Toxicity of Various Pyrolysis Liquids From Biosolids on Methane Production Yield

2019

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Aqueous pyrolysis liquid (APL) is a high-COD byproduct of wastewater biosolids pyrolysis that is comprised of numerous complex organic compounds and ammonia nitrogen (NH 3 -N). One potential beneficial use of APL is as a co-digestate to produce more biogas in anaerobic digesters. However, some APL organics and NH 3 -N are known to inhibit methane-producing microbes. Autocatalytic pyrolysis which uses previously-produced biochar as a catalyst during biosolids pyrolysis, increases energy-rich py-gas while eliminating bio-oil production and reducing COD concentration in the APL (catalyzed APL). However, the catalyzed APL still has a high organic strength and no suitable treatment strategies have yet been identified. In this study, the methane production yields and methanogenic toxicity of non-catalyzed and catalyzed APLs were investigated. Both non-catalyzed and catalyzed APLs were produced at 800 • C from a mix of digested primary and raw waste activated sludge from a municipal water resource reclamation facility. Using the anaerobic toxicity assay, APL digester loading rates higher than 0.5 gCOD/L for non-catalyzed and 0.10 gCOD/L for catalyzed APL were not sustainable due to toxicity. The IC 50 values (APL concentration that inhibited methane production rate by 50%) for non-catalyzed and catalyzed APLs were 2.3 and 0.3 gCOD/L, respectively. Despite having significantly fewer identified organic compounds catalytic APL resulted in higher methanogenic toxicity than non-catalytic APL. NH 3 -N was not the main inhibitory constituent and other organics in APL, including 3,5-dimethoxy-4-hydroxybenzaldehyde, 2,5-dimethoxybenzyl alcohol, benzene, cresol, ethylbenzene, phenols, styrene, and xylenes as well as nitrogenated organics (e.g., benzonitrile, pyridine) ostensibly caused considerable methane production inhibition. Future research focused on pretreatment methods to overcome APL toxicity and the use of acclimated biomass to increase methane production rates during APL anaerobic digestion or co-digestion is warranted.

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“…The scope of this research on commercially available production technologies limits the effect of innovation on long-term sustainability. It is, however, important to notice that the development of the third generation biofuels, produced from algae, is a future development that could render the biofuels considered in this research relatively less sustainable [108][109][110][111][112][113][114][115].…”

Section: Technologicalmentioning

confidence: 99%

A PESTLE Analysis of Biofuels Energy Industry in Europe

et al. 2019

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Biofuels production is expected to be an intrinsic confluence to the renewable energy sector in the coming years under the European regulations for renewable energy. Key standpoints of the biofuels promotions are the reduction of national carbon emissions and rural deployment. Despite jubilant outlook of biofuels for sustainable development, research efforts still tend to link the biofuel industry and regional growth. The aim of this study is to explore and review the biofuels industry through a socio-political, techno-economic, legal and environmental (PESTLE) analysis approach, and discuss the interrelation between technological facets and sustainable deployment.

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Key microbial populations involved in anaerobic degradation of phenol and p-cresol using different inocula

Cited by 59 publications

References 33 publications

Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Toxicity of Various Pyrolysis Liquids From Biosolids on Methane Production Yield

A PESTLE Analysis of Biofuels Energy Industry in Europe

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