Range analysis of Eucalyptus globulus bark low-temperature hydrothermal treatment to produce a new component for growing media industry

Chemetova, C.; Fabião, António; Gominho, Jorge; Ribeiro, Henrique

doi:10.1016/j.wasman.2018.07.019

Cited by 16 publications

(25 citation statements)

References 16 publications

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“…Recent studies showed that hydrothermal treatments were effective regarding phytotoxicity removal from industrial bark. After this treatment, bark maintains a very high air content that can be a plus in aeration improvement when added to commercial peat-based substrates [31].…”

Section: Bark and Wood-based Materials As Bioresources Growing Mediamentioning

confidence: 99%

“…Biochar and hydrothermal carbonization (HTC) might play a more important role as constituents of growing media. Whereas biochar is manufactured by heating organic matter in an anoxic situation (pyrolysis), the HTC process requires only moderate temperatures [31] and pressures and is usually used for materials with high water content, e.g., plants. Both processes, pyrolysis and HTC, show great potential for the production of sustainable CO 2 -neutral energy from biomass, because plants capture the sun energy and convert carbon dioxide from the atmosphere into carbohydrates via photosynthesis [23].…”

Section: Biochar and Hydrothermal Carbonization Products As Bioresourmentioning

confidence: 99%

“…Degraded peatlands contribute disproportionally to global greenhouse gas emissions, with approximately 25% of all CO 2 emissions from the land use sector [29]. Annual emissions equivalent of 15 million tons of carbon are estimated [23,24,30,31]. In addition, the renewal process of peatlands takes a very long time, and in arid areas peat is imported, with an impact both in environmental and economic terms.…”

Section: Introductionmentioning

confidence: 99%

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Increasing Sustainability of Growing Media Constituents and Stand-Alone Substrates in Soilless Culture Systems

2019

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Decreasing arable land, rising urbanization, water scarcity, and climate change exert pressure on agricultural producers. Moving from soil to soilless culture systems can improve water use efficiency, especially in closed-loop systems with a recirculating water/nutrient solution that recaptures the drain water for reuse. However, the question of alternative materials to peat and rockwool, as horticultural substrates, has become increasingly important, due to the despoiling of ecologically important peat bog areas and a pervasive waste problem. In this paper, we provide a comprehensive critical review of current developments in soilless culture, growing media, and future options of using different materials other than peat and rockwool. Apart from growing media properties and their performance from the point of view of plant production, economic and environmental factors are also important. Climate change, CO 2 emissions, and other ecological issues will determine and drive the development of soilless culture systems and the choice of growing media in the near future. Bioresources, e.g., treated and untreated waste, as well as renewable raw materials, have great potential to be used as growing media constituents and stand-alone substrates. A waste management strategy aimed at reducing, reusing, and recycling should be further and stronger applied in soilless culture systems. We concluded that the growing media of the future must be available, affordable, and sustainable and meet both quality and environmental requirements from growers and society, respectively.

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Section: Bark and Wood-based Materials As Bioresources Growing Mediamentioning

confidence: 99%

Section: Biochar and Hydrothermal Carbonization Products As Bioresourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Increasing Sustainability of Growing Media Constituents and Stand-Alone Substrates in Soilless Culture Systems

2019

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“…A control sample containing water-soluble fertilizer with essential macronutrients (N:P 2 O 5 :K 2 O = 15:10:20, concentration of 1.5 g/L) was also prepared to compare the results. Based on the results of the growth test, the root length (RL) index was calculated using the equation described by Chemetova et al [74] and Munoo-Liisa vitality (MLV) index, using the equation given by Maunuksela et al [75].…”

Section: Cress Seed Germination Testmentioning

confidence: 99%

Pyrolysis of Solid Digestate from Sewage Sludge and Lignocellulosic Biomass: Kinetic and Thermodynamic Analysis, Characterization of Biochar

Petrović

Vohl

Predikaka³

et al. 2021

Sustainability

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This study investigates the pyrolysis behavior and reaction kinetics of two different types of solid digestates from: (i) sewage sludge and (ii) a mixture of sewage sludge and lignocellulosic biomass—Typha latifolia plant. Thermogravimetric data in the temperature range 25–800 °C were analyzed using Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose kinetic methods, and the thermodynamic parameters (ΔH, ΔG, and ΔS) were also determined. Biochars were characterized using different chemical methods (FTIR, SEM–EDS, XRD, heavy metal, and nutrient analysis) and tested as soil enhancers using a germination test. Finally, their potential for biosorption of NH4+, PO43−, Cu2+, and Cd2+ ions was studied. Kinetic and thermodynamic parameters revealed a complex degradation mechanism of digestates, as they showed higher activation energies than undigested materials. Values for sewage sludge digestate were between 57 and 351 kJ/mol, and for digestate composed of sewage sludge and T. latifolia between 62 and 401 kJ/mol. Characterizations of biochars revealed high nutrient content and promising potential for further use. The advantage of biochar obtained from a digestate mixture of sewage sludge and lignocellulosic biomass is the lower content of heavy metals. Biosorption tests showed low biosorption capacity of digestate-derived biochars and their modifications for NH4+ and PO43− ions, but high biosorption capacity for Cu2+ and Cd2+ ions. Modification with KOH was more efficient than modification with HCl. The digestate-derived biochars exhibited excellent performance in germination tests, especially at concentrations between 6 and 10 wt.%.

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“…Sugarcane and eucalypt industries are very remarkable in Brazil, producing large amounts of waste. Eucalyptus is the most important source of biomass for paper pulp and wood industries, which generate large amounts of waste since the bark is not used as a valuable product (Chemetova et al 2018). In 2018, the Brazilian forestry sector produced 52 Mt of solid waste, 36.9 Mt of which was composed of barks, branches, and leaves (IBA 2019).…”

Section: Introductionmentioning

confidence: 99%

Composted sewage sludge as an alternative substrate for forest seedlings production

Gabira¹,

Silva²,

Bortolheiro³

et al. 2021

iForest

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The production of forest seedlings with adequate morphological and physiological characteristics is essential for the success of plantations. Substrates and irrigation are the major factors determining seedlings' growth. Substrates made of urban and agricultural residues are a sustainable alternative to peatbased substrates. In this study, we evaluated how composted sewage sludge substrates affect the growth and gas exchange in seedlings of Cedrela fissilis Vell. Seedlings were produced under daily irrigation depths of 6, 9, and 12 mm, and on different substrates. The substrates were based on sewage sludge composted with Eucalyptus bark or sugarcane bagasse, and a commercial substrate based on peat, involving a double factorial design with 12 treatments (3 irrigation depths × 3 substrates). Both physical and chemical characteristics of substrates were analyzed, and morphological traits and gas exchanges of seedlings were measured. Sewage sludge-based substrates presented different characteristics according to the material it was mixed. Eucalyptus bark provided higher bulk density (0.19 g cm -3 ) and lower total porosity (75%) to the substrate, while sugarcane bagasse increased macroporosity up to 60%. Seedlings produced in sewage sludge-based substrates presented a height up to 17.8 cm and stem diameters of between 8.39-10.29 mm. Higher shoot and root dry mass was obtained in sewage sludge-based substrates with irrigation depth of 9 mm, which were 3.71 and 2.01 g, respectively. Photosynthetic carbon assimilation varied between 2.26 and 3.23 µmol CO2 m -2 s -1 , and water use efficiency varied from 2.058 to 3.395 µmol CO2 (mol H2O) -1 , with the highest values being obtained in seedlings produced in sewage sludge-based substrates with irrigation depth of 6 mm. Our results demonstrate that sewage sludgebased substrates are an efficient alternative to commercial peat-based substrates for seedling production.

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Range analysis of Eucalyptus globulus bark low-temperature hydrothermal treatment to produce a new component for growing media industry

Cited by 16 publications

References 16 publications

Increasing Sustainability of Growing Media Constituents and Stand-Alone Substrates in Soilless Culture Systems

Increasing Sustainability of Growing Media Constituents and Stand-Alone Substrates in Soilless Culture Systems

Pyrolysis of Solid Digestate from Sewage Sludge and Lignocellulosic Biomass: Kinetic and Thermodynamic Analysis, Characterization of Biochar

Composted sewage sludge as an alternative substrate for forest seedlings production

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