Effects of pelletizing pressure and the addition of woody bulking agents on the physical and mechanical properties of pellets made from composted pig solid fraction

Pampuro, Niccolò; Bagagiolo, Giorgia; Priarone, Paolo Claudio

doi:10.1016/j.powtec.2017.01.092

Cited by 41 publications

(39 citation statements)

References 38 publications

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“…reported by Tenorio et al (2014) and Pampuro et al (2017), while compression resistances of pellets of Ebenopsis ebano and Havardia pallens were higher than the values reported. For wooden pellets, the resistance to change from its original appearance is very important, since it indicates how well they can resist external forces after a sustained period of use.…”

Section: Mechanical Propertiescontrasting

confidence: 66%

Peer Review #1 of "Physical, mechanical and energy characterization of wood pellets obtained from three common tropical species (v0.1)"

2018

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Background. The need for energy sources with low greenhouse gas emissions and sustainable production encourage the search for alternative biomass sources. However, the use of biomass fuels faces the problem of storage, transport and lower energy densities. Low-density values can negatively affect energy density, leading to an increase in transportation and storage costs. Use of pellets as alternative biomass source is a way to reduce the volume of biomass by densification, which improves their energy quality. They are produced by diverse biomass resources and mainly from wood materials. In all cases, it is important to evaluate the fuel characteristics, to determine their suitability on the heating system and handling properties. Methods. The present study determines and compares data from proximate analysis, calorific values, physical and mechanical properties of wood pellets produced from the common tropical species Acacia wrightii, Ebenopsis ebano and Havardia pallens. Data were obtained from pellets produced from each species chips collected from an experimental plantation and analyzed through ANOVA and Kruskal-Wallis test at 0.05 significance level. Results. The results of diameter, length and length/diameter ratio didn't show statistical differences (p > 0.05) among species. Acacia wrightii showed the highest density (1.2 g/cm 3). Values on weight retained and compression test showed statistical differences (p = 0.05) among species. Havardia pallens was more resistant to compression strength than A. wrightii and Ebenopsis ebano. Statistical differences (p < 0.01) were also observed for the volatile matter and calorific value. E. ebano has the lowest volatile matter (72%), highest calorific value (19.6 MJ/kg) as well as the fixed carbon (21%). Discussion. The pellets of the species studied have a high energy density, which makes them suitable for both commercial and industrial heating applications. A pellet with low compression resistance tends to disintegrate easily, due to moisture adsorption. The percentages obtained for the resistance index were higher than 97.5%, showing that the pellets studied are high-quality biofuels. Proximate analysis values also indicate good combustion parameters. Pellets of Acacia wrightii and Ebenopsis ebano are the more favorable raw material sources for energy purposes because of their high density, calorific value, low ash content and they also met majority of the international quality parameters.

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Section: Mechanical Propertiescontrasting

confidence: 66%

Peer Review #1 of "Physical, mechanical and energy characterization of wood pellets obtained from three common tropical species (v0.1)"

2018

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“…The higher dissipation of metribuzin by adding amendments to soil indicates that the soil microorganisms are able to remove metribuzin from agricultural soils and this practice can be considered in improving conventional agricultural management. The fact that there are microorganisms that are able to metabolize metribuzin in field soil, and organic amendments such as compost and manure may stimulate their activity, suggests that it may be possible to influence the fate and degradation of metribuzin and other chemicals applied to soil, but are difficult to adopt on large surfaces because the difficulties, and the costs to transport the product from the area where it is available to those where it can be applied to soil and the difficulties in application itself (Pampuro et al 2017b). An additional obstacle to adoption of organic amendments is the farmers' knowledge and awareness about the effects of such products in improving biological characteristics of soil (Pampuro et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Mehdizadeh

Izadi-Darbandi

Yazdi

et al. 2019

Int J Recycl Org Waste Agricult

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Purpose Persistence of herbicides in soil is a major concerning world issue due to their negative impacts on environment and human health. Laboratory and bioassay experiments were conducted to evaluate the effects of municipal waste compost (MC) and sheep manure (SM) on metribuzin degradation and phytotoxicity of this herbicide. Methods In degradation studies, soil samples were mixed separately with amendments at a rate of 2.5% (w/w) and metribuzin at a concentration of 5 mg kg −1 soil was used for fortification of selected samples. A liquid extraction method was chosen and final extracts were analyzed by HPLC. In bioassay study, the phytotoxic effects of different concentrations of metribuzin (0, 0.01, 0.05, 0.1, 0.2, 0.4, 0.8 and 1 mg kg −1 soil) on oilseed rape (Brassica napus L.) were evaluated. Results The results indicated 88.8% degradation of metribuzin in MC during 120-day period followed by SM recording 72.2%, compared to non-amended soil where 59.8% of metribuzin were removed. The half-life was 119.48 days in nonamended soil as compared to 87.72 and 103.43 days in MC and SM application, respectively. MC was the most efficient treatment to accelerate metribuzin dissipation from the soil. Bioassay results showed that metribuzin residues had a negative effect on root and shoot biomass of oilseed rape. However, the root parameter was more sensitive than the shoot. Conclusions It could be concluded that application of organic amendments to agricultural soils is an eco-friendly strategy to improve soil conditions and non-target crop protection as well as the removal of herbicide residues from soil environment.

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“…For comparison to the other researcher's organic granules compressive strength tests shows that compost granules formed using municipal solid wastes was 44-113 N (Zafari & Kianmehr, 2014). Granules made from composted pig solid fraction with biochar, whose compressive strength was 200-400 N (Pampuro, Bagagiolo, Priarone, & Cavallo, 2017). Compressive strength of food waste compost granules the values were above 200 N (Chew et al, 2018).…”

Section: Introductionmentioning

confidence: 85%

Investigation of Physical-Mechanical Properties and Impact on Soil of Granulated Manure Com-Post Fertilizers

Mieldažys

Jotautienė

Jasinskas

et al. 2019

Journal of Environmental Engineering and Landscape Management

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In recent years, the European countries recycle only 5−7% of bio-waste. One activity of the biological waste disposal is granulation. The production of fertilizer from animal manure with supplement represents an important area of environmentally friendly bio-fertilizer production. This paper presents an investigation of estimation manure compost physical-mechanical properties for reuse of organic waste − cattle and cow manure, sugar production waste − molasses through new technology pellets production and of granulated fertilizer impact on soil. The experimental manure samples produced by industrial methods and samples produced in the laboratory from the time period of 2014 to 2017 were investigated. The following physical – mechanical characteristics were estimated: biometric indicators (dimensions, mass), volume and density of raw material and pellets, material and pellet’s humidity and pellets strength. Experiments results have shown that the difference in limit strength between experimental and industrial organic compost pellets was about 5%. Experiments of fertilizers on the impact on soil shown that the amount of nutrients added to the soil depends on the rate of the granulated compost fertilizer. As the norm increases, organic carbon, humus, mobile phosphorus and potassium increase in soil. Increases in soil fertility, improved agrochemical properties, soil organic matter accumulation and humus increase. Granulated compost fertilizers have no effect on soil acidity. The presented results could be helpful to the development of the fertilizing process by the granulated compost fertilizer for improvement of soil quality in small farms.

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Effects of pelletizing pressure and the addition of woody bulking agents on the physical and mechanical properties of pellets made from composted pig solid fraction

Cited by 41 publications

References 38 publications

Peer Review #1 of "Physical, mechanical and energy characterization of wood pellets obtained from three common tropical species (v0.1)"

Peer Review #1 of "Physical, mechanical and energy characterization of wood pellets obtained from three common tropical species (v0.1)"

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Investigation of Physical-Mechanical Properties and Impact on Soil of Granulated Manure Com-Post Fertilizers

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