Maturity assessment of composted olive mill wastes using UV spectra and humification parameters

Sellami, Fatma; Hachicha, Salma; Chtourou, Mohamed; Medhioub, Khaled; Ammar, Emna

doi:10.1016/j.biortech.2008.01.055

Cited by 130 publications

(82 citation statements)

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“…Seed germination was used to assess the phytotoxicity (Sellami et al, 2008): 20 Lepidium sativum seeds were evenly distributed on filter paper in Petri dishes (diameter 10 cm) and moistened with 5 ml compost extract. A total of 5 ml of distilled water replaced the extract as a control, and then, the dishes for each sample were incubated at 25 °C for 3 d. The number of germinating seeds and root length were measured at every treatment.…”

Section: Compost Sampling and Analytical Methodsmentioning

confidence: 99%

Influence of bulking agents on CH4, N2O, and NH3 emissions during rapid composting of pig manure from the Chinese Ganqinfen system

Sun

Lu²,

Jiang

et al. 2014

J. Zhejiang Univ. Sci. B

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Mismanagement of the composting process can result in emissions of CH 4 , N 2 O, and NH 3 , which have caused severe environmental problems. This study was aimed at determining whether CH 4 , N 2 O, and NH 3 emissions from composting are affected by bulking agents during rapid composting of pig manure from the Chinese Ganqinfen system. Three bulking agents, corn stalks, spent mushroom compost, and sawdust, were used in composting with pig manure in 60 L reactors with forced aeration for more than a month. Gas emissions were measured continuously, and detailed gas emission patterns were obtained. Concentrations of NH 3 and N 2 O from the composting pig manure mixed with corn stalks or sawdust were higher than those from the spent mushroom compost treatment, especially the sawdust treatment, which had the highest total nitrogen loss among the three runs. Most of the nitrogen was lost in the form of NH 3 , which accounts for 11.16% to 35.69% of the initial nitrogen. One-way analysis of variance for NH 3 emission showed no significant differences between the corn stalk and sawdust treatments, but a significant difference was noted between the spent mushroom compost and sawdust treatments. The introduction of sawdust reduced CH 4 emission more than the corn stalks and spent mushroom compost. However, there were no significant differences among the three runs for total carbon loss. All treatments were matured after 30 d.

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Section: Compost Sampling and Analytical Methodsmentioning

confidence: 99%

Influence of bulking agents on CH4, N2O, and NH3 emissions during rapid composting of pig manure from the Chinese Ganqinfen system

Sun

Lu²,

Jiang

et al. 2014

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

show abstract

“…The measures were determined using Spectronic 20 Genesys Spectrophotometer. according the methodology proposed by Kononova, 1982;Zbytniewski & Buszewski, 2005;Sellami et al, 2008. From the absorbance value then were calculated the E2/E4, E2/E6 and E4/E6 ratio…”

Section: Methodsmentioning

confidence: 99%

“…The absorption at 280 nm was also introduced to represent total aromaticity, because the π-π * electron transition occurs in this UV region, for phenolic arenes, benzoic acids, aniline derivatives polyenes and polycyclic aromatic hydrocarbon with two or more rings (Uyguner & Bekbolet, 2005). The absorption at 470 nm is related with the fragment produced for the depolimerization or disaggregation of the supramolecular structure or material with a low humification degree (Sellami et al, 2008;Zbytniewski & Buszewski, 2004). The absorbance at 664 nm is characteristics of high oxygen content, aromatic compound, strongly humified material with a high degree of condensed groups (Sellami et al, 2008).…”

Section: Spectroscopic Properties Of Soil Alkaline Extractsmentioning

confidence: 99%

“…The absorption at 470 nm is related with the fragment produced for the depolimerization or disaggregation of the supramolecular structure or material with a low humification degree (Sellami et al, 2008;Zbytniewski & Buszewski, 2004). The absorbance at 664 nm is characteristics of high oxygen content, aromatic compound, strongly humified material with a high degree of condensed groups (Sellami et al, 2008). Lipski et al(1999) defined E2/E4 ratio (the ratio of absorbance at 280 and 400 nm) to characterize the degradation of phenolic/quinoid core of humic acids to simpler carboxylic aromatic compounds.…”

Section: Spectroscopic Properties Of Soil Alkaline Extractsmentioning

confidence: 99%

“…The absorption properties are conventional and versatile for the characterization and were used to evaluate the condensation degree of the humic aromatic nuclei. Various absorption wavelengths at 270, 280, 300, 400, 465 nm, among other, and their ratios have been cited for the spectral differentiation of humic substances (Sellami et al, 2008;Uyguner et al, 2005). By analyzing the absorption spectrum of UV-Visible, three important regions were observed at 280, 460 and 660 nm.…”

Section: Spectroscopic Propertiesmentioning

confidence: 99%

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