Co-Combustion of Animal Waste in a Commercial Waste-to-Energy BFB Boiler

Farzad Moradian, Anita Pettersson, Solvie Herstad Svärd and Tobias Richards
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Farzad Moradian: School of Engineering, University of Borås, Allégatan 1, 50190 Borås, Sweden
Anita Pettersson: School of Engineering, University of Borås, Allégatan 1, 50190 Borås, Sweden
Solvie Herstad Svärd: Scandinavian Energy Project AB, Rullagergatan 4, 41526 Göteborg, Sweden
Tobias Richards: School of Engineering, University of Borås, Allégatan 1, 50190 Borås, Sweden

Energies, 2013, vol. 6, issue 12, 1-18

Abstract: Co-combustion of animal waste, in waste-to-energy boilers, is considered a method to produce both heat and power and to dispose of possibly infected animal wastes. This research conducted full-scale combustion tests to identify the impact of changed fuel composition on a fluidized-bed boiler. The impact was characterized by analyzing the deposit formation rate, deposit composition, ash composition, and emissions. Two combustion tests, denoted the reference case and animal waste case, were performed based on different fuel mixes. In the reference case, a normal solid waste fuel mix was combusted in the boiler, containing sorted industry and household waste. In the animal waste case, 20 wt% animal waste was added to the reference fuel mix. The collected samples, comprising sampling probe deposits, fuel mixes, bed ash, return sand, boiler ash, cyclone ash and filter ash, were analyzed using chemical fractionation, SEM-EDX and XRD. The results indicate decreased deposit formation due to animal waste co-combustion. SEM-EDX and chemical fractionation identified higher concentrations of P, Ca, S, and Cl in the bed materials in the animal waste case. Moreover, the risk of bed agglomeration was lower in the animal waste case and also a decreased rate of NO x and SO 2 emissions were observed.

Keywords: bubbling fluidized bed (BFB) boiler; animal waste; MSW; deposit; ash (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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