ABSTRACT

In the present work, oil sludge was subjected to the process of stabilization by solidification, the objective was to indicate maximum permissible limits of chemical demand for oxygen and oils and greases to evaluate the resulting material. A factorial design was used with the addition of three repetitions at the central point, to evaluate the performance of different percentage of residue and different curing times. The factors adopted were the percentage of oil sludge and the curing time. This material was evaluated using contaminants immobilization tests. From the leached and solubilized liquid, the concentration of the contaminants was determined and the environmental assessment was also carried out through the analysis of chemical demand for oxygen and oils and greases. One of the contributions of this work was to propose the maximum allowable limit for chemical oxygen demand, which is 1,000 (one thousand) milligrams per liter and, for oil and grease content, 100 (one hundred) milligrams per liter, both for the leaching test. For the solubilization test, 10 (ten) milligrams per liter were proposed for chemical oxygen demand and 1 (one) milligrams per liter for the oil and grease content. It was observed that the best results are obtained, when lower values of percentage of oil sludge were used and longer cure time. This work allows to affirm that the proposal of limits of environmental evaluation contributes to assure an adequate disposition and use of the cement matrix, that is the final product of the oily residue stabilized by solidification.

摘要

在目前的工作中，油污通过固化进行了稳定化处理，目的是表明对氧气和油脂的化学需求的最大允许限值，以评估所得材料。使用阶乘设计，并在中心点添加了三个重复，以评估不同百分比的残留物和不同固化时间的性能。采用的因素是油泥的百分比和固化时间。使用污染物固定测试评估了该材料。从浸出并溶解的液体中，确定污染物的浓度，并通过对氧气，油脂的化学需求分析来进行环境评估。这项工作的贡献之一是提出了化学需氧量的最大允许限值，即每公升1,000（千）毫克，对于油脂含量，每公升100（一百）毫克。测试。对于增溶测试，化学需氧量建议为每升10（十）毫克，油脂含量建议为每升1（一）毫克。据观察，当使用较低的油泥百分比值和较长的固化时间时，可获得最佳结果。这项工作可以肯定环境评估极限的建议有助于确保适当处置和使用水泥基体，水泥基体是通过固化稳定的油性残渣的最终产品。每公升000（千）毫克，对于油脂含量，每公升100（一百）毫克（均用于浸出试验）。对于增溶测试，化学需氧量建议为每升10（十）毫克，油脂含量建议为每升1（一）毫克。据观察，当使用较低的油泥百分比值和较长的固化时间时，可获得最佳结果。这项工作可以肯定环境评估极限的建议有助于确保适当处置和使用水泥基体，水泥基体是通过固化稳定的油性残渣的最终产品。每公升000（千）毫克，对于油脂含量，每公升100（一百）毫克（均用于浸出试验）。对于增溶测试，化学需氧量建议为每升10（十）毫克，油脂含量建议为每升1（一）毫克。据观察，当使用较低的油泥百分比值和较长的固化时间时，可获得最佳结果。这项工作可以肯定环境评估极限的建议有助于确保适当处置和使用水泥基体，水泥基体是通过固化稳定的油性残渣的最终产品。建议的化学需氧量为每升10（十）毫克，油脂含量建议为每升1（一）毫克。据观察，当使用较低的油泥百分比值和较长的固化时间时，可获得最佳结果。这项工作可以肯定环境评估极限的建议有助于确保适当处置和使用水泥基体，水泥基体是通过固化稳定的油性残渣的最终产品。建议的化学需氧量为每升10（十）毫克，油脂含量建议为每升1（一）毫克。据观察，当使用较低的油泥百分比值和较长的固化时间时，可获得最佳结果。这项工作可以肯定环境评估极限的建议有助于确保适当处置和使用水泥基体，水泥基体是通过固化稳定的油性残渣的最终产品。