Evaluation of organic matter stabilization in sewage sludge

DeNobili, M.; Cercignani, Giovanni; Leita, L.; Sequi, P.

doi:10.1080/00103628609367777

Cited by 31 publications

(7 citation statements)

References 2 publications

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“…Since these results were in agreement with those found in a previous study [47], this soil pH modification was slight (2.87% = BC and 2.87% = PF), and there was no correlation with HM bioavailability [48]. Soil acidification observed upon increasing of the experiment time for all treatments was possibly due to soil organic matter mineralization [49] and/or to H+ formation by the fertilizer solubilization [50]. Therefore, liming may be necessary to compensate potential soil acidification when using PF and BC application to reduce HM-contaminated soil [51].…”

Section: Effect Of Amendments Application On Soil Chemicalsupporting

confidence: 82%

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Branzini

Zubillaga

2012

Applied and Environmental Soil Science

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Remediation strategies are capable to mitigate negative effects of heavy metals (HMs) on soils. The distribution of cooper (Cu), zinc (Zn), and chromium (Cr) was evaluated in a contaminated soil after adding biosolid compost (BC) and phosphate fertilizer (PF). A greenhouse assay and sequential extraction procedure were performed to determine the fractionation of HM in contaminated and remediated soil. In BC treatment, among 4 to 6% of Cu was associated with soil humic substances. Without amendments and with fertilizer application, Zn solubility increased by 15.4 and 8.4%, respectively, with experiment time. Although Cr was significantly adsorbed to the inorganic fraction, with compost application there was a transfer to organic fraction. A single amendment application is not suitable for immobilizing all metals of concern, because there are diverse union's behaviors between HM and soil matrix. As the organic matter and phosphate fertilizer were effective in reducing mobility of Cu, the organic matter was more effective in the immobilization of Cr, and inorganic amendment induced the Zn precipitation, results from this pilot study suggest a combined use of these two amendments for soil remediation strategies. However, liming may be further needed to prevent soil acidification on longer time scales. Also, we propose the use of chemical and biological remediation strategies for potential improvement of effectiveness.

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Section: Effect Of Amendments Application On Soil Chemicalsupporting

confidence: 82%

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Branzini

Zubillaga

2012

Applied and Environmental Soil Science

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“…The solution was acidified with HCl until pH < 2, thus, causing the precipitation of the HA fraction, which was separated from the soluble fraction by centrifugation. The FA fraction was then separated from the NH fraction using small columns filled with insoluble polyvinylpyrrolidone (De Nobili et al. 1986).…”

Section: Methodsmentioning

confidence: 99%

“… HI = NH/(HA + FA), where NH = TEC −(HA + FA) (De Nobili et al. 1986); DH(%) = [(HA + FA)/TEC] × 100 (Ciavatta and Govi 1993); HR(%) = [(HA + FA)/TOC] × 100 (Ciavatta and Govi, 1993). …”

Section: Methodsmentioning

confidence: 99%

Fate of¹⁵N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees

Tonon

Ciavatta

Solimando

et al. 2007

Soil Science and Plant Nutrition

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The fate of nitrogen (N) derived from soil incorporating 15 N-labeled apple (Malus domestica) leaves and wood from pruning (hereafter referred to as "pruning wood") was studied in an 8-month pot experiment. The net mineralization of N was measured as 15 N recovery in perennial ryegrass (Lolium perenne) that was allowed to grow in soils amended with residues < 2 mm in size (litter : soil ratio, w/w, 1:250 for leaves and 1:330 for wood). The immobilization of native soil N as a consequence of residue addition was measured by comparing the amount of total N taken up by ryegrass in residue-amended soil and in control soil. Net immobilization of soil N occurred during the first 2 months after litter addition and was especially high in the soil amended with leaf litter. During the period of soil N immobilization, the amount of soil microbial N was high in the soils treated with both types of residues, while that of mineral N was markedly reduced only in the leaf-litter-amended soil. Net N uptake from the control soil almost stopped after 3 months of plant growth, while ryegrass in the litter-amended soil continued to take up N, indicating a likely release of previously immobilized N. Net mineralization of the 15 N from apple residues was slow during the first 2 months after their incorporation and then increased. In total, 6% (leaves) and 12% (wood) of the N added via residues underwent mineralization, while 67% (leaves) and 85% (wood) were found in the extractable soil N pool (humic and fulvic acids and non-humified fractions). The data indicated that, even if N was incorporated into the soil, apple leaves and pruning wood did not mineralize significant amounts of N in the short term. The evidence suggested that during the decomposition of both types of apple residues the N originally present was incorporated into the stable soil N pool.

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“…Former term defines the rate of biological decomposition during the composting process (Barren et al 2006), evaluated by determining the humification index (HA:FA) of the compost. The latter verifies the suitability of compost for crops by measuring the ratio of carbon in total humic matter and humin (DeNobili and Petrussi 1988). Various spectral techniques are currently in practice to characterize HS chemistry, such as elemental analysis.…”

Section: Introductionmentioning

confidence: 95%

Additive effect of cow dung slurry and cellulolytic bacterial inoculation on humic fractions during composting of municipal solid waste

Rastogi

Nandal

Nain

2019

Int J Recycl Org Waste Agricult

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Purpose The work aimed to investigate the effect of cow dung and cellulolytic bacteria on humic characteristics during municipal solid waste composting. Four Bacillus isolates (B. subtilis, B. tequilensis, B. venezuelans and B. amyloliquefaciens) sourced from dumpsite soil were formulated as consortium for the study. Methods Four treatments were considered with addition of bulking agents (ratio 1:7:6) to 15 kg MSW. Treatment Cs 1 (control): only MSW, Cs 2 : MSW + cellulolytic bacterial inoculum @ 5 ml (2 × 10 9 CFU ml −1); Cs 3-MSW + cow dung slurry @ 1 kg (1:100 based on wet weight) and Cs 4-MSW + cellulolytic bacterial inoculum @ 5 ml (2 × 10 9 CFU ml −1) + cow dung slurry @ 1 kg (diluted 1:100 based on wet weight). The analyses of humic acids were done by elemental analyzer, UV and Fourier transform infrared spectroscopy during 90 days of composting. Results MSW amended with consortia of effective microorganisms and cow dung slurry projected highest humification degree at 82.4% (P < 0.01). Highest temperature (63 °C) was recorded in the treatment Cs 4 during composting. The data corresponded to an increase in H/C ratio (0.9%) with a decrease in C/N (14.8%) and O/C ratio (0.5%). In addition, most stabilized values for E 4 /E 6 ratio (4.1) and E 2 /E 3 ratio (2.1) were observed in Cs 4. The humification indices manifest positive regression values (F (4, 1) = 0.007; P < 0.01) and 99% significant model. Conclusion In the study, bio-augmentation (bacterial consortia and cow dung slurry) to MSW composting facilitates early maturity compared to other inoculated/uninoculated treatments. The result substantiates the effect of temperature on the humification rate of composting.

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Evaluation of organic matter stabilization in sewage sludge

Cited by 31 publications

References 2 publications

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Fate of¹⁵N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees

Additive effect of cow dung slurry and cellulolytic bacterial inoculation on humic fractions during composting of municipal solid waste

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Evaluation of organic matter stabilization in sewage sludge

Cited by 31 publications

References 2 publications

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization

Fate of15N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees

Additive effect of cow dung slurry and cellulolytic bacterial inoculation on humic fractions during composting of municipal solid waste

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Fate of¹⁵N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees