Thermochemical conversion characteristics of biosolid samples from a wastewater treatment plant in Brisbane, Australia
نویسندگان
چکیده
Environmental context Biosolids are nutrient-rich organic materials. They can be used as fertiliser and solid amendments in agriculture if treated according to regulatory requirements. If farming applications of biosolids decline due potential pollution from their heavy metal content, an alternative traditional methods biosolid disposal is required. In this context, thermal processing economically environmentally suitable option convert large quantities into useful energy. Rationale Due more stringent environmental regulations frequently required long-distance transportation, the wastewater treatment plants landfills farms becoming unsustainable. A potentially economical thermochemical conversion energy value-added products. This paper describes chemical composition content a representative sample collected major wastewater-treatment plant Queensland, Australia. Methodology The behaviour compositional changes were investigated under wide range pyrolysis gasification conditions using horizontal tube furnace (HTF), fixed-bed reactor thermogravimetric analyser (TGA). terms practical application by-products, we describe mineral matter transformations char ashes during volatilisation well different conditions. Results HTF experiments revealed that at below 800°C, mainly species released, while losses inorganic elements (phosphorus, magnesium zinc) occurred higher temperatures. In-situ chars TGA showed reaction rapidly temperatures above 720°C, regardless which those produced. Mineral began 600°C, involved transformation amorphous phases crystalline oxide phosphide forms. Under conditions, all appeared phosphates alumino-silicates. Discussion described here provide options for by adjusting optimising processes.
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ژورنال
عنوان ژورنال: Environmental Chemistry
سال: 2023
ISSN: ['1448-2517', '1449-8979']
DOI: https://doi.org/10.1071/en22074