Molecular diversity of liquid digestate from anaerobic digestion plants for biogenic waste

He, Pinjing; Huang, Yulong; Qiu, Junjie; Zhang, Hua; Shao, Liming

doi:10.1016/j.biortech.2021.126373

Cited by 11 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Eluates collected after SPE were stored in chromatography vials at −40 °C until UPLC-Q-Orbitrap MS analysis. The extraction efficiency of the method ranged between 49% and 59% for digestate as investigated in our previous study, with good reproducibility …”

Section: Methodsmentioning

confidence: 71%

“…The extraction efficiency of the method ranged between 49% and 59% for digestate as investigated in our previous study, with good reproducibility. 18 After electrodialysis was complete, the membrane stack was disassembled immediately to extract the firmly attached foulants. The used IEMs were taken out, cut into pieces (2 cm × 2 cm), and freeze-dried for 10 h at −40 °C.…”

Section: Molecular Information Acquisitionmentioning

confidence: 99%

“…Over 90% of the identified molecular formulas were composed of CHO and CHON. Because the ESI(−) mode was disadvantageous for the recognition of nitrogen-containing groups (e.g., amines, amides, heterocyclic compounds, and nitriles), 18 relative abundances of CHON compounds were relatively low. The contents of nitrogen-containing organic molecules were better detected in the ESI(+) mode.…”

Section: Dom Divergence Between Fd and MDmentioning

confidence: 99%

“…A recent spotlighted nontarget analysis using high-resolution mass spectrometry, which matches the exact molecular formulas of the hundreds or thousands of peaks identified, is expected to provide insights into the behavior of dissolved organic matter (DOM). The method has recently been used extensively to identify molecular properties of DOM in various natural water bodies or wastewater and to elucidate the molecular conversion patterns in different wastewater-treatment processes. − In addition, attempts to interpret DOM chemodiversity in mature digestates from full-scale anaerobic digesters have been reported, , but studies regarding the molecular characterization of fresh digestates are few.…”

Section: Introductionmentioning

confidence: 99%

“…The method has recently been used extensively to identify molecular properties of DOM in various natural water bodies 12 or wastewater 13 and to elucidate the molecular conversion patterns in different wastewater-treatment processes. 14−16 In addition, attempts to interpret DOM chemodiversity in mature digestates from full-scale anaerobic digesters have been reported, 17,18 but studies regarding the molecular characterization of fresh digestates are few.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Molecular Behavior of Dissolved Organic Matter in Liquid Digestate from Biogenic Waste during Electrodialysis Treatment: Reserve, Transfer, or Foul the Membrane?

Wang

Huang

et al. 2022

ACS EST Water

Self Cite

View full text Add to dashboard Cite

Effective management and beneficial utilization of liquid digestate is becoming a bottleneck of anaerobic digestion. Electrodialysis exhibits considerable potential in liquid digestate valorization; however, the process is typically challenged by severe membrane fouling due to high organic matter content. In the present study, a bench-scale electrodialysis was carried out to treat fresh and mature digestate with an aim of investigating the behavior of dissolved organic matter (DOM) during electrodialysis using ultrahigh-resolution mass spectrometry. Organics that were easily transported across the ion-exchange membrane (IEM) had relatively high O/C ratios (0.208−0.414) contributed from carboxyls, as well as relatively low H/C ratios (1.15−1.55) and high aromatic indexes (0.257−0.504) contributed from the benzene rings. Chemical cleaning with HCl and NaOH exhibited a cleaning effect on 66%−69% richness of DOM and completely removed 33%−38% richness of foulants via deprotonation or protonation effects, whereas 36%−45% richness of DOM, which had significantly higher aromatic indices, could not be completely removed by chemical cleaning due to their high hydrophobic affinity for the polymer matrix of IEM. The speculated fouling mechanisms included electrostatic interactions, hydrophobic interactions, hydrogen bonding, and geometrical exclusion. The results of the present study could enhance our understanding of DOM behavior during electrodialysis at the molecular level and, in turn, provide insights into the mitigation and prevention of membrane fouling in electrodialysis for the treatment of other organic-rich wastewaters.

show abstract

Section: Methodsmentioning

confidence: 71%

Section: Molecular Information Acquisitionmentioning

confidence: 99%

Section: Dom Divergence Between Fd and MDmentioning

confidence: 99%