Abstract

The sewage sludge and the chemical composition of its ash were characterized experimentally. Mineral compounds of the ash were studied by X-ray microanalysis, X-ray diffraction, and IR spectroscopy. The fusion temperatures of the sewage sludge ash were determined by the cone method. The main parameters of the slag formation (base to acid ratio, slag viscosity index, and fouling index) were calculated. The ash contains large amounts of P₂O₅, CaO, SiO₂, and Fe₂O₃. Thermodynamic calculations show that large amounts of Ca₃(PO₄)₂ and CaSiO₃, significant amount of Fe₂O₃, and small amounts of MgSiO₃, Al₂O₃, and SiO₂ are observed in the temperature interval 600–1400°С. The sewage sludge ash tends to slagging and fouling on the reactor walls.

中文翻译：

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高温处理条件下污泥灰的行为

摘要

实验表征了污泥及其灰分的化学组成。通过X射线微分析，X射线衍射和IR光谱研究了灰分中的矿物质。污水污泥灰的熔融温度采用锥法测定。计算了炉渣形成的主要参数（碱酸比，炉渣粘度指数和结垢指数）。灰分包含大量的P ₂ O ₅，CaO，SiO ₂和Fe ₂ O ₃。热力学计算表明，大量的Ca ₃（PO ₄）₂和CaSiO ₃，大量的Fe ₂ O ₃在600-1400°С的温度区间内观察到少量的MgSiO ₃，Al ₂ O ₃和SiO ₂。污水污泥灰倾向于在反应器壁上结渣和结垢。