Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary analysis, and spectroscopic methods

Yang, Yuning; Li, Huan; Li, Jinyi

doi:10.1007/s11783-014-0755-9

Cited by 29 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This slight increase in the aromaticity of HAs could be caused by microorganisms that can transform aliphatics to aromatics and can form polymer humic compounds. 8,9,31 This study highlights the correlation between the bioremediation of soil polluted with petroleum and its derivatives and the process of humification. With increasing duration of bioremediation, the level of TPH decreases.…”

Section: Quantitative and Qualitative Analysis Of Humic Acidsmentioning

confidence: 79%

“…8,9,31 During bioremediation, the oxygen content increased from 23.23 to 27.97 %, the calculated O/C ratio increased from 0.28 to 0.35 and the E 4 /E 6 ratio increased from 2.25 to 3.91, which indicates enrichment of HAs with oxygen functional groups. 9,15,31,32 Table I also shows some comparative values extracted from published literature. They show significant variations in values, most likely due to the diversity in the structure of humic acids.…”

Section: Change In Tph Content and Number Of Microorganisms During Bimentioning

confidence: 98%

“…S-1A-D of the Supplementary material), the following signals were present: aromatic C=C, C=O in carboxyl; ketone, quinone groups and amide I (the signal 1600-1660 cm −1 ); aromatic C=C and amide II (the signal about 1508 cm −1 ); OH of phenols, COO− and amide II (signals between 1460 and 1370 cm −1 ); aromatic ethers C-O-C and amide III (signals between 1260 and 1200 cm −1 ). 8,31 Based on the intensity of the peaks in the FTIR spectra, transformation of HAs was observed during bioremediation. Changes were monitored by com-828 ŽERAĐANIN et al paring the peak intensity and calculating the ratio of peaks 1654.1/2920.5 (aromatic C/aliphatic C) and 1654.1/2850.8 (aromatic C/aliphatic C, Table II.…”

Section: Quantitative and Qualitative Analysis Of Humic Acidsmentioning

confidence: 99%

See 2 more Smart Citations

Evolution of humic acids during ex situ bioremediation on a pilot level: The added value of the microbial activity

Žerađanin

Avdalović

Lješević

et al. 2020

JSCS

View full text Add to dashboard Cite

Environmental pollution is a global problem, while bioremediation technology removes pollutants from the environment using microorganisms. This study was aimed at investigating how a bioremediation process affected soil humification. In soil polluted with petroleum and its derivatives that was submitted to bioremediation, besides the total petroleum hydrocarbons and the number of microorganisms, quantitative and qualitative changes of isolated humic acids were determined during the process. The bioremediation of 150 m 3 of polluted soil lasted 150 days. The level of total petroleum hydrocarbons decreased by 86.6 %, while the level of humic acids increased by 26.5 %. The elemental analysis showed the reduction of C and the H/C ratio and the increase of O and the O/C ratio of isolated humic acids during the process. The ratio of absorbencies at 465 and 665 nm also increased. Based on this and the Fourier-transform infrared spectra, it was shown that the humic acids isolated at the end of bioremediation were enriched with oxygen functional groups and aromatic structures. This study provides one of the first insights into the relationship between bioremediation and humification, as well as evidence of how hydrocarbon-degrading microorganisms have a significant influence on changes to humic acid structure during bioremediation.

show abstract

Section: Quantitative and Qualitative Analysis Of Humic Acidsmentioning

confidence: 79%

Section: Change In Tph Content and Number Of Microorganisms During Bimentioning

confidence: 98%

Section: Quantitative and Qualitative Analysis Of Humic Acidsmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of humic acids during ex situ bioremediation on a pilot level: The added value of the microbial activity

Žerađanin

Avdalović

Lješević

et al. 2020

JSCS

View full text Add to dashboard Cite

show abstract

“…The research conducted in recent years demonstrates that an important source generating humic substances is waste management, in particular wastewater treatment plants and landfills [26][27][28][29][30][31][32][33][34]. An important source is constituted by digested sludge.…”

Section: Introductionmentioning

confidence: 99%

Humus Acids in the Digested Sludge and Their Properties

Anielak

Kłeczek

2022

Materials

View full text Add to dashboard Cite

Fulvic acids, alpha (α) humic acids and hymatomelanic acids were extracted digested sludge in two Cracow sewage treatment plants: Kujawy and Płaszów. Their elemental composition was examined and micropollution and ash content were determined. Based on the IR and UV-VIS spectrum, their similarities were determined with the occurring interactions with micropollution. Strong correlations between the acids coming from different sources depend on acid type and micropollution accompanying them, depending on concentration, influences to a specific extent their IR and UV-VIS spectra. Absorption analysis in infrared constitutes a simple method for characterizing fulvic and humic acids from wastewater treatment plants. The extracted fulvic acids were characterized by moderate maturity, while humus acids were well developed. In the fermentation process, the N bond increases together with the level of humification of the humus acid. The characteristics of the extracted humus acids comply with other humic substances presented in the literature. Quantitative analysis showed that digested sludge contains, on average: FA from 5.07 to 5.30 g/kg dry matter, αHA from 59.22 to 74.72 g/kg dry matter, HMA from 20.31 to 43.66 g/kg dry matter. It was thus demonstrated that wastewater treatment, in particular digested sludge, constitutes an attractive source of humus acids with a wide range of applications in numerous areas, such as agriculture, ecological rehabilitation, environmental protection, animal breeding, aquaculture, veterinary as well as medicine and is a precious source of soil fertilizers.

show abstract

“…Although small in volume, the relatively high concentration of nutrients will increase the load on the biological nutrient removal process, and recalcitrant components may accumulate and increase the concentration of organic compounds in the facility effluent. Consequently, research into the formation of compounds such as melanoidins (Dwyer, Starrenbury, et al, 2008), caramelization products (Kroh, 1994), humic and fulvic acids (Yang, Li, & Li, 2014) in thermal treatment is important for the planning and optimization of the whole WRRF.…”

Section: Introductionmentioning

confidence: 99%

Quantification of soluble recalcitrant compounds in commercial thermal hydrolysis digestates

Svennevik

Nilsen

Solheim

et al. 2020

Water Environment Research

View full text Add to dashboard Cite

Solid residues such as primary sludge (PS), waste activated sludge (WAS), and food waste (FW) can be stabilized through anaerobic digestion (AD). Application of the thermal hydrolysis process (THP) prior to AD results in several benefits in AD and dewatering. However, soluble recalcitrant compounds associated with Maillard reactions have been identified after THP which can impact downstream processes and water discharge limits. In this study, the soluble colloidal chemical oxygen demand, color, ultraviolet absorbance at 254 nm and dissolved organic nitrogen in seven full‐scale THP facilities were quantified and compared. The THP substrate influenced the concentration of soluble melanoidin‐associated compounds in the digestates. THP implementation in five water resource recovery facilities (WRRFs) was modeled and found to give a 3–8 mg/L increase on the water effluent COD concentration depending on the PS/WAS ratio. The results provide novel information useful in planning new WRRFs and optimization of existing facilities. Practitioner points High amounts of WAS in substrate resulted in higher concentrations of CODsc, color and dissolved organic nitrogen in the digestate. Food waste treated at 145°C showed equal or lower concentrations of all components compared with sludge operated at 165°C. Installation of THP will increase the COD concentration in the water effluent of a water resource recovery facility. The characteristics of the THP substrate are important to consider in cost/benefit analysis when planning the installation of THP.

show abstract

Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary analysis, and spectroscopic methods

Cited by 29 publications

References 28 publications

Evolution of humic acids during ex situ bioremediation on a pilot level: The added value of the microbial activity

Evolution of humic acids during ex situ bioremediation on a pilot level: The added value of the microbial activity

Humus Acids in the Digested Sludge and Their Properties

Quantification of soluble recalcitrant compounds in commercial thermal hydrolysis digestates

Contact Info

Product

Resources

About