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A study on basic properties and pyrolysis characteristics of waste water treatment sludge from paper mills

SU Zhen-hu

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Abstract

Basic properties and pyrolysis characteristics of primary sludge, secondary sludge and advanced treatment sludge from paper mill were studied. According to the analysis of pyrolysis process by means of Coats-Redfern method and based on the calculated kinetic parameters of three kinds of sludge at 10℃/min heating rate. It is found that the reaction order of primary sludge is 2 at the organic pyrolysis region, the other two are 3. The activation energy of the three kinds of sludge are 43.80 kJ/mol, 32.74 kJ/mol and 7.16 kJ/mol, and their frequency factor are 1.56×106 min-1, 1.18×107min-1 and 2.60×108min-1 respectively.

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What this paper is about

Basic properties and pyrolysis characteristics of primary sludge, secondary sludge and advanced treatment sludge from paper mill were studied. According to the analysis of pyrolysis process by means of Coats-Redfern method and based on the calculated kinetic parameters of three kinds of sludge at 10℃/min heating rate. It is found that the reaction order of primary sludge is 2 at the organic pyrolysis region, the other two are 3. The activation energy of the three kinds of sludge are 43.80 kJ/mol, 32.74 kJ/mol and 7.16 kJ/mol, and their frequency factor are 1.56×106 min-1, 1.18×107min-1 and 2.60×108min-1 respectively.

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Available abstract

Basic properties and pyrolysis characteristics of primary sludge, secondary sludge and advanced treatment sludge from paper mill were studied. According to the analysis of pyrolysis process by means of Coats-Redfern method and based on the calculated kinetic parameters of three kinds of sludge at 10℃/min heating rate. It is found that the reaction order of primary sludge is 2 at the organic pyrolysis region, the other two are 3. The activation energy of the three kinds of sludge are 43.80 kJ/mol, 32.74 kJ/mol and 7.16 kJ/mol, and their frequency factor are 1.56×106 min-1, 1.18×107min-1 and 2.60×108min-1 respectively.

Key concepts: Pyrolysis, Paper mill, Frequency factor, Waste management, Activation energy, Chemistry, Pulp and paper industry, Order of reaction

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