Abstract

Theoretical studies of processes of oily wastewater treatment for removing various impurities determined the main mechanism of the formation of coagulation structures and aggregates with their subsequent settling and phase separation, which disturb the aggregation and kinetic stability of the medium. It was found that a more advanced coagulation leads to the destruction of interlayers of the medium between particles, which brings the particles into direct contact with each other. This results in the formation of rigid aggregates with fractal structure, which consist both of hard particles, and of asphaltenes and resins, sometimes shaped as flakes. If the particles coagulate in a turbulent flow, their number decreases, although their sizes increase up to the sizes of aggregates. It was noted that the formation of coagulation structures is beneficial for separation of the solid phase from the liquid phase in wastewater treatment. An investigation was made of the potential of a synergetic mixture of slaked lime and ferric chloride for accelerating the formation of coagulation structures in oily wastewater treatment. Experimental studies showed the efficiency of using such a mixture for removing petroleum products and solid particles in wastewater treatment. In intense stirring of this mixture in a mixer at 1500–2000 rpm, isotropic turbulence is reached, which favors the coagulation and aggregation of particles. It was found that the best composition of the mixture is 1.0 g of slaked lime and 0.06 cm³ of ferric chloride, which best promote the high-quality coagulation and settling of particles. Based on the boundary conditions for mass transfer, kinetic models for calculating the consumption of the mixture were proposed, and a kinetic parameter was estimated. The results of the performed experiments showed that, with increasing concentration of the mixture, the impurity content of wastewater progressively decreases, and wastewater becomes almost transparent. Using the synergetic mixture in wastewater treatment creates conditions for the formation of stronger structures of aggregates prone to natural settling.

中文翻译：

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协同混合含油废水处理工艺的理论与实验研究。

摘要

含油废水处理中各种杂质去除过程的理论研究确定了凝结结构和聚集体形成的主要机理，以及随后的沉降和相分离，这干扰了介质的聚集和动力学稳定性。已经发现，更高级的凝结导致颗粒之间介质中间层的破坏，这使颗粒彼此直接接触。这导致形成具有分形结构的刚性聚集体，该刚性聚集体既包含硬颗粒，又包含有时被制成薄片状的沥青质和树脂。如果颗粒在湍流中凝结，它们的数量会减少，尽管它们的大小会增加到聚集体的大小。注意到凝结结构的形成对于废水处理中固相与液相的分离是有利的。研究了熟石灰和氯化铁的协同混合物在含油废水处理中加速凝结结构形成的潜力。实验研究表明在废水处理中使用这种混合物去除石油产品和固体颗粒的效率。在混合器中以1500–2000 rpm的速度剧烈搅拌该混合物，会达到各向同性湍流，这有利于颗粒的凝结和聚集。发现混合物的最佳组成是1.0克熟石灰和0.06厘米 研究了熟石灰和氯化铁的协同混合物在含油废水处理中加速凝结结构形成的潜力。实验研究表明在废水处理中使用这种混合物去除石油产品和固体颗粒的效率。在混合器中以1500–2000 rpm的速度剧烈搅拌该混合物，会达到各向同性湍流，这有利于颗粒的凝结和聚集。发现混合物的最佳组成是1.0克熟石灰和0.06厘米 研究了熟石灰和氯化铁的协同混合物在含油废水处理中加速凝结结构形成的潜力。实验研究表明在废水处理中使用这种混合物去除石油产品和固体颗粒的效率。在混合器中以1500–2000 rpm的速度剧烈搅拌该混合物，会达到各向同性湍流，这有利于颗粒的凝结和聚集。发现混合物的最佳组成是1.0克熟石灰和0.06厘米 实验研究表明在废水处理中使用这种混合物去除石油产品和固体颗粒的效率。在混合器中以1500–2000 rpm的速度剧烈搅拌该混合物，会达到各向同性湍流，这有利于颗粒的凝结和聚集。发现混合物的最佳组成是1.0克熟石灰和0.06厘米 实验研究表明在废水处理中使用这种混合物去除石油产品和固体颗粒的效率。在混合器中以1500–2000 rpm的速度剧烈搅拌该混合物，会达到各向同性湍流，这有利于颗粒的凝结和聚集。发现混合物的最佳组成是1.0克熟石灰和0.06厘米³氯化铁，最能促进颗粒的高质量凝结和沉降。基于传质的边界条件，提出了用于计算混合物消耗量的动力学模型，并估算了动力学参数。进行的实验结果表明，随着混合物浓度的增加，废水中的杂质含量逐渐降低，废水几乎变为透明。在废水处理中使用协同混合物为形成易于自然沉降的骨料结实结构创造了条件。