Waste bones ash as an alternative source of P for struvite precipitation

Darwish, Mohamad; Aris, Azmi; Puteh, Mohd Hafiz; Jusoh, Mazura; Kadir, Aeslina Abdul

doi:10.1016/j.jenvman.2016.02.033

Cited by 40 publications

(32 citation statements)

References 18 publications

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“…The results could probably have contributed by fish bones and chicken bones that presented in the sample. Waste fish and chicken bones are characterized with high ashes content which composed of calcium phosphate and carbonate compounds; during torrefaction, these contents have contributed towards the formation of ash, thus resulting in high ash content of the torrefied product [13].…”

Section: Proximate Analysismentioning

confidence: 99%

Effect of Torrefaction Temperature, Residence Time and Particle Size on the Properties of Torrefied Food Waste

et al. 2019

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Municipal solid waste (MSW) in Malaysia mainly consists of food waste. As food waste is of organic compounds, its improper management may cause serious environmental issues, as it may produce greenhouse gases and polluting leachate. Alternative management of the food waste is through its utilization. However, the main issue in the utilization of food waste is its heterogeneity, whereby the diversified cooking methods, as well as food origin, emanates different characteristics. Hence, food waste needs to be pre-treated through the torrefaction process, which is a thermochemical method that converts it to biochar at a temperature between 200–300 °C in an inert environment. The main aim of this work is to evaluate the feasibility of food waste as a potential source of energy through the torrefaction process. The torrefaction of food waste was conducted in a vertical tubular reactor under an inert atmosphere. The results obtained from this study showed that as torrefaction temperature became more severe, the produced torrefied solid is more energy-dense, with apparent higher fixed carbon content and improved heating values. These findings imply that food waste may be able to be utilized as a solid biofuel, with fuel properties comparable to conventional fuels.

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Section: Proximate Analysismentioning

confidence: 99%

Effect of Torrefaction Temperature, Residence Time and Particle Size on the Properties of Torrefied Food Waste

et al. 2019

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“…The change in temperature had a larger effect using calcined paper mill sludge than when using fly ash sludge. Others have obtained similar phosphate removal results with fly ash [38,39], waste bone ash [40], and calcined waste paper mill sludge [32], Moriyama et al [41] achieved 75-85% efficiency of hydroxyapatite formation using Ca-rich media in phosphorus removal.…”

Section: Characterization Of the Reject Watermentioning

confidence: 79%

The Use of Industrial Waste Materials for the Simultaneous Removal of Ammonium Nitrogen and Phosphate from the Anaerobic Digestion Reject Water

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Pesonen

Nurmesniemi

et al. 2019

Waste Biomass Valor

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The European Union's circular economy strategy aims to increase the recycling and re-use of products and waste materials. According to the strategy, the use of industry waste materials and side flows is required to be more effective. In this research, a chemical precipitation method to simultaneously remove ammonium and phosphate from the reject water of anaerobic digestion plant using calcined paper mill sludge and fly ash as a precipitant, was tested. Paper mill sludge is a waste material formed in the paper-making process, and fly ash is another waste material formed in the power plant. Objective of this research was to test whether these industrial waste streams could be used as low cost precipitation chemicals for ammonium and phosphate removal from wastewaters and whether the precipitate could be suitable for fertilizer use. Results indicated that calcined paper mill sludge had high removal efficiency for both ammonium (97%) and phosphate (73%). Fly ash also had good removal efficiency for both ammonium nitrogen (74%) and phosphate (59%) at 20 ± 2 °C. The precipitates contained high concentrations of nitrogen and phosphate and could be used as a recycled fertilizer. Other possible mechanisms for the removal of phosphate and ammonium were considered.

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“…The growing amount of bone remains has been recognized as one of the significant environmental challenges. Some of this waste can be reused as fertilizers [1][2][3].…”

Section: Investigation Of the Granulation Of Fertilizersmentioning

confidence: 99%