scholarly journals Evaluation of Joint Management of Pine Wood Waste and Residual Microalgae for Agricultural Application

2020 ◽  
Vol 13 (1) ◽  
pp. 53
Author(s):  
José Guillermo Rosas ◽  
Natalia Gómez ◽  
Jorge Cara-Jiménez ◽  
Judith González-Arias ◽  
Miguel Ángel Olego ◽  
...  
Keyword(s):  
Solid Fraction ◽  
Soil Amendment ◽  
Carbon Sink ◽  
Wood Waste ◽  
Solid Product ◽  
Pine Wood ◽  
Joint Management ◽  
Agricultural Application ◽  
Negative Balance ◽  
By Products

This work addresses the joint management of residual microalgae and pine wood waste through pyrolysis to obtain a solid product for its use as soil amendment and two other by-products (liquid and gaseous) that can be used for energy purposes. Two management routes have been followed. The first route is through the co-pyrolysis of mixtures of both residual materials in several proportions and the later use of their solid fraction for soil amendment. The second route is the pyrolysis of pine wood waste and its direct combination with dried residual microalgae, also using it as soil amendment. The solid fraction assessment shows that from seven solid products (biochar) three stand out for their positive applicability in agriculture as soil amendment. In addition, they also present the benefit of serving as carbon sink, giving a negative balance of CO2 emissions. However, caution is suggested due to biochar applicability being subject to soil characteristics. To ensure the sustainability of the overall process, the energy available in liquid and gaseous fractions has been assessed for covering the drying needs of the residual microalgae in both cases. These results suggest that the pyrolysis process is a sustainable way to manage specific evaluated residues and their products.

Evaluation of the potential of feedstock combinations and their biochars for soil amendment

2021 ◽  
pp. 0734242X2110606
Author(s):  
Maliheh Fouladidorhani ◽  
Mohammad Shayannejad ◽  
Emmanuel Arthur
Keyword(s):  
Physicochemical Properties ◽  
Soil Amendment ◽  
Particle Density ◽  
Soil Amendments ◽  
Organic Matter Content ◽  
Total Porosity ◽  
Matter Content ◽  
Cow Manure ◽  
N Content ◽  
Pine Wood

One of the approaches for recycling and reusing agricultural and animal wastes is to pyrolyse the residues and subsequently use them as soil amendments. The prevalence of several feedstocks suggests that it is necessary to investigate the optimal combinations of feedstocks and pyrolysis temperature for use as soil amendments. This study was done to evaluate five combinations of raw materials (sugarcane bagasse, rice husk, cow manure and pine wood) and their biochars produced by slow pyrolysis at 300°C and 500°C for soil amendment. Several physicochemical properties (electrical conductivity (EC), pH, cation exchange capacity (CEC), total organic matter content (C) total porosity (TP), total nitrogen (N), particle density (PD) and bulk density (BD)) were investigated. Comparison among feedstocks showed that the highest PD, BD and CEC were observed in WM (cow manure-pine wood). The pyrolysis process increased the PD, TP, N and monovalent cations and decreased EC, CEC and BD. Compared to the feedstock, pyrolysis increased the N content, but higher temperatures lowered the N content. Pyrolysis at 500°C reduced the EC, N, CEC and biochar yield by 18%, 13%, 21% and 24% respectively, compared to 300°C. Pyrolysis at 500°C increased the pH, Na+ and K+ by 17%, 12% and 22%, respectively, compared to 300°C. Considering the physicochemical properties of biochar and the costs, the bagasse-wood-rice (BWR) combination and temperature of 300°C are suggested for biochar production for soil amendment.

scholarly journals Alkaline Mineral Soil Amendment: A Climate Change ‘Stabilization Wedge’?

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2299 ◽  
Author(s):  
Fatima Haque ◽  
Yi Chiang ◽  
Rafael Santos
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Soil Amendment ◽  
Agricultural Soil ◽  
Carbon Sink ◽  
Mineral Soil ◽  
Earth Metal ◽  
Mineral Weathering ◽  
Sequestration Potential ◽  
The Impact

Extreme climate change due to heat-trapping gases, especially carbon dioxide, necessitates its mitigation. In this context, the carbon dioxide sequestration technology of enhanced weathering has for years been investigated, with a possible implementation strategy via alkaline mineral soil amendment being more recently proposed. Candidate materials for enhanced weathering include calcium and magnesium silicates, most notably those belonging to the olivine, pyroxene and serpentine groups of minerals, given their reactivity with CO2 and global availability. When these finely crushed silicate rocks are applied to the soil, the alkaline earth metal cations released during mineral weathering gradually react with carbonate anions and results in the formation of pedogenic carbonates, which, over time, and under the right conditions, can accumulate in the soil. This review paper critically reviews the available literature on alkaline mineral soil amendments and its potential to sequester enough CO2 to be considered a climate change ‘stabilization wedge’. Firstly, evidence of how agricultural soil can serve as a carbon sink in discussed, based on the observed accumulation of inorganic carbon in alkaline mineral-amended soils. Secondly, the impact of alkaline minerals on agricultural soil and crops, and the factors determining the rate of the weathering process are assessed. Lastly, the CO2 sequestration potential via alkaline mineral soil amendment is quantified according to an idealized shrinking core model, which shows that it has the potential to serve as a climate change stabilization wedge.

Evaluation of wastewater treatment by-products as soil amendment: Growth of sorghum-sudan grass and trace elements concentrations

2012 ◽  
Vol 47 (11) ◽  
pp. 1678-1686 ◽  
Author(s):  
Paramasivam Sivapatham ◽  
Mariel C. Potts ◽  
Jeffrey A. Delise ◽  
Kenneth S. Sajwan ◽  
Ashok K. Alva ◽  
...  
Keyword(s):  
Trace Elements ◽  
Wastewater Treatment ◽  
Soil Amendment ◽  
Sudan Grass ◽  
By Products

scholarly journals Pyrolysis of wheat and barley straw

2020 ◽  
Vol 66 (No. 1) ◽  
pp. 8-17
Author(s):  
Anežka Sedmihradská ◽  
Michael Pohořelý ◽  
Petr Jevič ◽  
Siarhei Skoblia ◽  
Zdeněk Beňo ◽  
...  
Keyword(s):  
Agricultural Production ◽  
Soil Amendment ◽  
Crop Residues ◽  
Experimental Studies ◽  
Atomic Ratio ◽  
Barley Straw ◽  
Agricultural Crop ◽  
Biomass Pyrolysis ◽  
Solid Product ◽  
Practical Temperature

Pyrolysing agricultural crop residues and other biomass constitutes a newer method of transforming often difficult, waste materials into a novel type of soil amendment/additive. Simultaneously, this process also makes it possible to exploit part of the energy released in the agricultural production. Biochar, viewed as the solid product of biomass pyrolysis, is a remarkable, porous material, rich in carbon. Two agricultural crop residues, such as wheat and barley straw, were selected for the experimental studies. The results indicate that the practical temperature for the production of biochar from the two explored materials occurs in the vicinity of 600 °C. Starting at this temperature, the biochar produced complies safely with the principal European Biochar Certificate standards (EBC 2012). Thus, for the wheat straw and barley straw – originated char, the content of the carbon amounts to 67.2 and 67.0 mass %, the atomic ratio H : C is as large as 0.032 and 0.026, and the specific surface area amounts to 217 and 201 m<sup>2</sup>·g<sup>–1</sup>, respectively.

Accelerated aging of pine wood waste/recycled LDPE composite

2018 ◽  
Vol 149 ◽  
pp. 39-44 ◽  
Author(s):  
D.D.P. Moreno ◽  
D. Hirayama ◽  
C. Saron
Keyword(s):  
Accelerated Aging ◽  
Wood Waste ◽  
Pine Wood
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