Flotation sludge from the meat processing industry can be applied as biofuel in already existing plant-scale boilers. This biosolid is rich in oil and grease and has higher energetic content on a dry ash-free basis (22.74 and 27.71 MJ kg⁻¹) than the wood-based fuel (16.62 and 16.16 MJ kg⁻¹). Co-combustion trials were performed at a pilot-scale cyclonic combustor (100 kg h⁻¹) and at an industrial flamotubular rotatory grate-fired system (6000 kg h⁻¹), co-firing pre-dried and centrifuged flotation sludges (respectively) and wood at a mass ratio of 1:3. At a moisture content of 60.13 wt%, the lower heating value of the centrifuged sludge was 10.24% lower compared to wood, thus reducing it to at least 40 wt% would be advisable to obtain energy gains in the industrial plant when operating the co-combustion. The emissions were evaluated and compared to emission standards, including the characterization of polycyclic aromatic hydrocarbons and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (given as Toxicity Equivalent Factors at O_2ref = 7%), which have not yet been reported. The 16 target polycyclic aromatic hydrocarbons were identified at pilot and plant scales (0.582 ± 0.143 μg Nm⁻³ and 0.602 ± 0.506 μg Nm⁻³, respectively) being lower than the Danish reference standard (5.0 μg Nm⁻³). The polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans concentrations were 0.0004 ± 0.0001 ng Nm⁻³ at pilot scale and 0.3617 ± 0.1310 ng Nm⁻³ at plant scale, both below the Brazilian and American standards but differed greatly between the scales, requiring further investigation since their formation can occur due to combustion and postcombustion conditions.

中文翻译：

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肉类加工业的生物固体与木材共同燃烧产生的气体排放

来自肉类加工业的浮选污泥可用作现有工厂规模锅炉中的生物燃料。这是生物固体丰富的石油和油脂，具有干燥无灰基上充满活力的高含量（22.74和27.71 MJ公斤^-1比木质燃料）（16.62和16.16 MJ公斤^-1）。在中试规模的旋风燃烧器（100 kg h ^-1）和工业火焰管旋转炉排燃烧系统（6000 kg h ^-1)，混合燃烧预干燥和离心的浮选污泥（分别）和木材，质量比为 1:3。在水分含量为 60.13 wt% 时，离心污泥的较低热值比木材低 10.24%，因此建议将其降低至至少 40 wt%，以在工厂运行时获得能源收益。燃烧。对排放进行了评估并与排放标准进行了比较，包括多环芳烃和多氯二苯并对二恶英和多氯二苯并呋喃（在 O _2ref  = 7% 时作为毒性等效因子给出）的_表征，这些尚未报告。在中试和工厂规模（0.582 ± 0.143 μg Nm ^-3和 0.602 ± 0.506 μg Nm^-3，分别）低于丹麦参考标准（5.0 μg Nm ^-3）。中试规模的多氯二苯并对二恶英和多氯二苯并呋喃的浓度分别为 0.0004 ± 0.0001 ng Nm ^-3和工厂规模的0.3617 ± 0.1310 ng Nm ^-3，均低于巴西和美国的标准，但规模之间差异很大，需要进一步研究调查，因为它们的形成可能由于燃烧和燃烧后条件而发生。