Recycling of ash – For the good of the environment?

Huotari, Noora; Tillman-Sutela, Eila; Moilanen, Mikko; Laiho, Raija

doi:10.1016/j.foreco.2015.03.008

Cited by 119 publications

(103 citation statements)

References 119 publications

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“…However, this has not been observed at lower doses of granulated ash, at least not in the short term when a great deal of Ca may still be in an insoluble form. Furthermore, ash nutrient retention in the recipient soil greatly varies among elements as well as among sites; especially K may be lost through leaching (Huotari et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…This model allows quantifying N soil or substrate contribution that are potentially available for crops and generating sustainable recommendations for N fertilizer doses (Campbell et al, 1995). However, these are direct impacts, while other indirect benefits from ash are through changes in soil processes induced by altered soil chemistry (Huotari et al, 2015). The hypothesis of our research was that the application of pelletized amendments composed of paper mill ash and sludge improves N mineralization and provides mineral nutrients to the soil.…”

Section: Introductionmentioning

confidence: 99%

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Pelletized paper mill waste promotes nutrient input and N mineralization in a degraded Alfisol

Undurraga

Hirzel

Celis

et al. 2017

Chil. j. agric. res.

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Pulp and paper mill waste, such as biomass fly ash and sewage sludge, is commonly disposed of in landfills. This waste can be valuable as nutrients and C sources for degraded soils. Ash and sludge samples were chemically characterized before ash/sludge pellets were experimentally manufactured for use as soil amendment. An incubation experiment was carried out with controlled moisture and temperature; nutrient input and N mineralization were evaluated at 0, 15, 30, 45, and 60 d intervals using three pellet types with different proportions of ash, sludge, and gypsum (as a binder) and applied at four doses equivalent to 0, 10, 20, and 40 Mg ha -1 . Results indicated that the Alfisol that was amended with pelletized residues increased P Olsen and exchangeable K and Ca contents, as well as soil pH (p < 0.05) in direct response to the applied doses. Organic matter decreased during incubation at all the doses and pellet types (p < 0.05); however, N mineralization did not show a clear pattern during incubation. Nitrogen mineralization potential (N 0 ) was different depending on pellet types and application rates; Pellet 2 (10% sludge) exhibited the highest N 0 values, while Pellet 3 (20% sludge) had lower N 0 than the control. Pulp and paper mill waste can be used to amend degraded soils by creating sustainable use through pelletizing because it facilitates transport and can evenly distribute sludge and ash on soils in a single application.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pelletized paper mill waste promotes nutrient input and N mineralization in a degraded Alfisol

Undurraga

Hirzel

Celis

et al. 2017

Chil. j. agric. res.

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“…The contents of these nutrients make ash 33 suitable for use as a fertilizer, and it has therefore been suggested that use of wood ash in 34 the forest may have beneficial effects on forest tree growth. However, there have been 35 concerns over the ecological effects of relatively high concentrations of heavy metals and 36 arsenic (As) in wood ash (Pitman 2006; Augusto et al 2008;Huotari et al 2015). 37 Any effect -beneficial or unfavourable -will depend not only on the element concentrations 38 in the ash but also on the dose of ash applied (how much and how often) and how the ash is 39 pre-treated.…”

mentioning

confidence: 99%

“…As ash originates from a large number of trees grown over a larger area than that which is 58 fertilised, elements including heavy metals may become somewhat concentrated locally 59 after ash fertilisation (Huotari et al 2015). This can increase the total soil reserve of heavy was seven cm.…”

mentioning

confidence: 99%

Short-term effects of whole-tree harvesting on understory plant species diversity and cover in two Norway spruce sites in southern Norway

Økland

Nordbakken

Lange

et al. 2016

Scandinavian Journal of Forest Research

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“…Numerous studies have demonstrated that applications of wood ash on forest soils can be used to replace some of the nutrients, e.g., phosphorus (P), calcium (Ca), magnesium (Mg), potassium (K) removed during timber harvesting; counteract the effects of acid rain on forest soils and surface water bodies; and, improve tree growth (Pitman 2006, Huotari et al 2015, Reid and Watmough 2015. In some European countries, applications of wood ash are encouraged to prevent nutrient deficiencies following biomass harvesting, particularly on nutrient-poor forest sites (Karltun et al 2008, Forestry Commission 2009. Therefore, the disposal of wood ash in Canadian landfills potentially represents a wasted opportunity to obtain greater value from forest biomass while enhancing the ecological sustainability of forestry operations.…”

Section: Introductionmentioning

confidence: 99%

AshNet: Facilitating the use of wood ash as a forest soil amendment in Canada

VenierL.¹,

Hope²,

McKenneyD.³

et al. 2017

The Forestry Chronicle

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The growing demand for bioenergy has raised concerns about the sustainability of intensive forest biomass removal. Less attention has been paid to the ash generated when forest biomass is combusted to produce energy. In Canada, this ash is often landfilled, but in some countries, wood ash is applied to the soil to maintain or improve soil fertility and forest health. AshNet is a network of Canadian scientists, foresters, policy makers and industry representatives that has formed to address opportunities for and challenges to the use of wood ash as a forest soil amendment. To date, AshNet collaborators have produced a guide to navigating the regulatory approval process, and completed a techno-economic analysis of the costs associated with landfilling wood ash versus using it as a forest soil amendment. Practical methods for optimizing ash quality and applying it on forested sites are being investigated. Applications of wood ash are also being examined as a tool for emulating some of the effects of wildfire on soil chemistry. The results of research trials established by AshNet collaborators across Canada will be shared to help develop and refine forest management policies and practices surrounding soil applications of wood ash. Updates on AshNet's activities are available at (http://cfs.nrcan.gc.ca/projects/140 (English); http://scf.rncan.gc.ca/projets/140?lang=fr_CA (French)).

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Recycling of ash – For the good of the environment?

Cited by 119 publications

References 119 publications

Pelletized paper mill waste promotes nutrient input and N mineralization in a degraded Alfisol

Pelletized paper mill waste promotes nutrient input and N mineralization in a degraded Alfisol

Short-term effects of whole-tree harvesting on understory plant species diversity and cover in two Norway spruce sites in southern Norway

AshNet: Facilitating the use of wood ash as a forest soil amendment in Canada

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