Use of biomass ash-based materials as soil fertilisers: Critical review of the existing regulatory framework

Silva, Flávio C.; Cruz, Nuno; Tarelho, L.A.C.; Rodrigues, Sónia

doi:10.1016/j.jclepro.2018.12.268

Cited by 97 publications

(45 citation statements)

References 48 publications

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“…It is evident that interest is exponentially increasing. In addition, the interest sector of reuse, which was originally oriented to building materials, is now also devoted to polymer applications, with other limited applications in alternative fields (Figure 1b), such as soil amendment [15,16]. In particular, in the frame of the research activity made in the last few years [17][18][19][20], some of the ashes derived from coal combustion are employed to stabilize fly ash deriving from MSWI in the present paper.…”

Section: Introductionmentioning

confidence: 99%

Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

et al. 2020

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This review paper reports a detailed characterization of some combustion or incineration residues and by-products produced in a medium-sized city in Northern Italy. The municipal solid waste incineration (MSWI) generates fly ash, which is a toxic waste. Coal fly ash (CFA) and flue gas desulfurization (FGD) derive from the thermoelectric coal plant located in the same city. Along with these ashes, silica fume and rice husk ash are also considered for the stabilization of fly ash based on their amorphous silica content with the aim to convert them into an inert material. The characterization of all the investigated ashes was performed using different techniques: X-ray diffraction, total reflection X-ray fluorescence, scanning electron microscopy, and transmission electron microscopy. The aim of this work is to describe the reuse possibilities that were proposed for these ashes, which were determined also on the basis of their structural properties. Several possible applications of the investigated ashes are proposed, and the most suitable reuse of stabilized fly ash samples seems to be the production of sustainable plastic composites. This paper shows that the reuse of the by-product materials can allow natural resources to be preserved following the principles of a circular economy.

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Section: Introductionmentioning

confidence: 99%

Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

et al. 2020

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“…Ash is frequently considered an unwanted product because of its toxic elements, such as Cd, Ni, Pb, Cr, Zn, Co, and Cu (Maresca et al 2018;Munda et al 2016;Noyce et al 2016); therefore, large quantities of generated ash are regularly applied for landfills (Careddu et al 2015;Valentim et al 2019). Ash also contains major nutrients required by plants, except for nitrogen, and has liming properties due to its high contents of metal oxides and hydroxides (Maresca et al 2019;Qin et al 2017;Silva et al 2019). Therefore, ash is frequently applied as an ameliorant material to soils to improve soil quality.…”

Section: Introductionmentioning

confidence: 99%

Different Effects of Ash Application on the Carbon Mineralization and Microbial Biomass Carbon of Reclaimed Mining Soils

Saidy

Hayati

Septiana

2020

J Soil Sci Plant Nutr

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Ash resulting from biomass energy resource utilization contains a wide range of metal oxides and hydroxides, which may influence the capacity of the ash to be used as a soil amelioration material. This study aimed to assess the effects of different ashes on changes in soil carbon (C) mineralization and soil microbial biomass carbon (MBC) in reclaimed mining soils (RMSs). Different levels (0, 25, 50, and 75 Mg ha −1) of three ashes (rice husk, oil palm shell, and coal fly ash) were applied to 10-year RMS for a 120-day incubation period. Carbon mineralization was measured over the 120-day incubation period, while MBC and selected chemical properties were quantified at the end of the incubation period. The results of the study showed that the application of rice husk and oil palm shell ash at all levels and coal fly ash at low levels (≤ 25 Mg ha −1) increased C mineralization and MBC. However, the C mineralization and MBC of the soil decreased significantly when the amount of added coal fly ash reached 75 Mg ha −1. These decreases in C mineralization and MBC may be ascribed to the harmful effect of high amounts of coal fly ash on microbial activity and the increased specific surface areas and contents of Ca, Mg, oxalate-and dithionite-extractable iron and aluminum in soil with high amounts of added coal fly ash. This study demonstrates that the application of different types of ash to RMS leads to different C mineralization and soil MBC responses.

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“…In their recent review, Sharma et al [44] emphasised that biomass ash can be valorised to produce different added-value products: it can enhance the properties of construction materials or replace mineral oxides to produces glasses and glass-ceramics, including to obtain optical or dielectric materials. Silva and colleagues [45] reviewed the application of biomass ash as soil fertiliser, emphasising that the current EU legislative framework may hinder this possibility. Other authors showed that ash may act as an adsorbent of pollutants from gaseous or liquid streams, also pointing out that the profitability is higher when the ash is employed near the production site [20,46,47].…”

Section: On the Use Of Subproducts In A Circular Economy Viewmentioning

confidence: 99%

Current Status of Energy Production from Solid Biomass in North-West Italy

2020

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Data on the thermochemical plants fed by solid biomass in the north-west area of Italy (Liguria, Lombardy, Piedmont and Aosta Valley) have been organised, analysed and discussed. Moreover, the biomass availability and potential has been evaluated. A total of 28,167 plants have been categorised according to their typology and output: thermo-electric power plants for electricity production, thermal plants for heat production, cogeneration plants for combined heat and electricity production and district heating installations for local heating purposes. In general, separate observations for the different provinces may be drawn. Liguria stands out as the most evident case of under-exploited biomass potential, followed by Aosta Valley, which, however, is rich in hydroelectricity. Lombardy and Piedmont are more virtuous and have several plants in their territory. The construction of new plants and the upgrade of existing ones may bring noteworthy benefits, as well as the use of added value sub-products to foster circular economy approaches.

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Use of biomass ash-based materials as soil fertilisers: Critical review of the existing regulatory framework

Cited by 97 publications

References 48 publications

Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

Different Effects of Ash Application on the Carbon Mineralization and Microbial Biomass Carbon of Reclaimed Mining Soils

Current Status of Energy Production from Solid Biomass in North-West Italy

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