Structural transformation study of water-extractable organic matter during the industrial composting of cattle manure

He, Xiao-Song; Xi, Beidou; Jiang, Yonghai; He, Liansheng; Li, Dan; Pan, Hongwei; Bai, Shun

doi:10.1016/j.microc.2012.06.004

Cited by 84 publications

(29 citation statements)

References 25 publications

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“…degree of polymerization, in both piles didn't clearly display a classic increase trend throughout the composting process observed by Bernal et al (2009) and He et al (2013).…”

Section: Changes Of C/n Ha/fa and Solvita Maturity Indexmentioning

confidence: 74%

Co-composting of livestock manure with rice straw: Characterization and establishment of maturity evaluation system

et al. 2014

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Abstract:Composting is considered to be the primary treatment method for livestock manure and rice straw, and high degree of maturity is the principal requirement for safe land application of composting product. In this study pilot-scale experiments were carried out to characterize the co-composting of livestock manure and rice straw, as well as to establish a maturity evaluation index system for the composts obtained.Two pilot composting piles with different feedstocks were conducted for 3 months: (1) swine manure and rice straw (SM-RS); and (2) dairy manure and rice straw (DM-RS).During the composting process, parameters including temperature, moisture, pH, total organic carbon (TOC), organic matter (OM), different forms of nitrogen (total, ammonia and nitrate), and humification index (humic acid and fulvic acid) were monitored in addition to germination index (GI), plant growth index (PGI) and Solvita maturity index. OM loss followed the first-order kinetics equation in both piles, and slightly higher OM mineralization rate was achieved in SM-RS pile. Also, SM-RS pile exhibited slightly better performance than DM-RS from the evolutions of temperature, OM degradation, GI and PGI. The C/N ratio, GI and PGI could be included in the maturity evaluation index system in which GI > 120% and PGI >1.00 signal mature co-composts.

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“…degree of polymerization, in both piles didn't clearly display a classic increase trend throughout the composting process observed by Bernal et al (2009) and He et al (2013).…”

Section: Changes Of C/n Ha/fa and Solvita Maturity Indexmentioning

confidence: 74%

Co-composting of livestock manure with rice straw: Characterization and establishment of maturity evaluation system

et al. 2014

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“…Only HA5 did not demonstrate a fluorescence maximum at β site. The γ area was applied to maximum placed at 435–445 nm/505–525 nm which could be ascribed to the presence of unsaturated bonds, high molecular weight and high humification degree as well as to linearly-condensed aromatic rings formed mainly from lignin oxidation [11,16,46]. These sites were clearly seen for all HAs except for HA3.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, fluorescence spectroscopy has been applied extensively to molecular characterization, differentiation and classification of humic substances as well as to monitor their changes in waste water or during processes of composting, mineralization or humification [3,11,12,13,14]. However, fluorescence detection can also be applied as an effective technique for understanding the mechanisms of intramolecular and intermolecular interactions between metals and humic acid [15,16].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Application of Fluorescence Excitation-Emission Matrices Combined with Parallel Factor Analysis and Nonnegative Matrix Factorization in the Analysis of Zn Complexation by Humic Acids

Boguta

Pieczywek

Sokołowska

2016

Sensors

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The main aim of this study was the application of excitation-emission fluorescence matrices (EEMs) combined with two decomposition methods: parallel factor analysis (PARAFAC) and nonnegative matrix factorization (NMF) to study the interaction mechanisms between humic acids (HAs) and Zn(II) over a wide concentration range (0–50 mg·dm−3). The influence of HA properties on Zn(II) complexation was also investigated. Stability constants, quenching degree and complexation capacity were estimated for binding sites found in raw EEM, EEM-PARAFAC and EEM-NMF data using mathematical models. A combination of EEM fluorescence analysis with one of the proposed decomposition methods enabled separation of overlapping binding sites and yielded more accurate calculations of the binding parameters. PARAFAC and NMF processing allowed finding binding sites invisible in a few raw EEM datasets as well as finding totally new maxima attributed to structures of the lowest humification. Decomposed data showed an increase in Zn complexation with an increase in humification, aromaticity and molecular weight of HAs. EEM-PARAFAC analysis also revealed that the most stable compounds were formed by structures containing the highest amounts of nitrogen. The content of oxygen-functional groups did not influence the binding parameters, mainly due to fact of higher competition of metal cation with protons. EEM spectra coupled with NMF and especially PARAFAC processing gave more adequate assessments of interactions as compared to raw EEM data and should be especially recommended for modeling of complexation processes where the fluorescence intensities (FI) changes are weak or where the processes are interfered with by the presence of other fluorophores.

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“…The BIX values varied in a range of 0.75-0.81 during the aerobic decomposition process, suggesting that the organic matters were microbially derived. Aerobic decomposition is characterized by an enzymatically catalyzed hydrolysis of organic macromolecules, such as lignin [33]. The first step of decomposition is a surface erosion process that leads to the formation of water-soluble intermediates [34], which are then assimilated and metabolized by microbial cells.…”

Section: Characterization Of Effluent Dommentioning

confidence: 99%

Characterization of Dissolved Organic Matter from Effluents in a Dry Anaerobic Digestion Process Using Spectroscopic Techniques and Multivariate Statistical Analysis

Guo

Chen

et al. 2016

Waste Biomass Valor

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Dissolved organic matter (DOM) collected from a garage-type dry fermentation system was investigated using UV-Vis absorption and fluorescence spectroscopy. Spectral parameters A 253/203 , biological index and fluorescence index were used to assess the structural characteristics and sources of effluent DOM. The results showed that aromatic rings highly substituted with hydroxyl, carbonyl, ester and carboxylic groups were obtained in the aerobic decomposition stage, and microbially derived organic matter dominated in the dry anaerobic digestion process, suggesting that the hydrolysis of organic macromolecules (lignin) in the aerobic decomposition resulted in the formation of water-soluble intermediates which can be easily assimilated and metabolized by microbial cells in dry anaerobic digestion process. PARAFAC of the excitation-emission matrix spectra revealed five fluorescent components occurring in effluent DOM: four humic-like components (C1-C4) and one protein-like component (C5). The F max values of components 1, 2, 3 and 5 showed large fluctuation than that of component C4, suggested the formation and degradation of these components. Component C4, with high aromatic content and higher degree of humification, was more difficult to be utilized and degraded by microorganisms than other components. The PAR-AFAC-PCA displayed three PCA factors (factors 1, 2 and 3), which accounted for 34.51, 34.20 and 31.11 %, respectively, of the variance in fluorescent components. Humic-like component C4 showed positive factor 1 loadings. Factor 2 was mainly explained by the tryptophan-like component C5. The humic-like components 1, 2 and 3 concurrently showed a relatively high factor 3 loading. The PARAFAC-PCA in this study could separate the characteristics of the DOM fluorescent component namely the source strength of the humic-like components versus the contributions of protein-like components in the total fluorescence analyses.

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Structural transformation study of water-extractable organic matter during the industrial composting of cattle manure

Cited by 84 publications

References 25 publications

Co-composting of livestock manure with rice straw: Characterization and establishment of maturity evaluation system

Co-composting of livestock manure with rice straw: Characterization and establishment of maturity evaluation system

A Comparative Study of the Application of Fluorescence Excitation-Emission Matrices Combined with Parallel Factor Analysis and Nonnegative Matrix Factorization in the Analysis of Zn Complexation by Humic Acids

Characterization of Dissolved Organic Matter from Effluents in a Dry Anaerobic Digestion Process Using Spectroscopic Techniques and Multivariate Statistical Analysis

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