Purification Efficiency on the Granulometric Composition

Author Name(s): Ilnar A. Nasyrov, Dinar D. Fazullin, Gennady V. Mavrin, Ildar G. Shaikhiev
Author Email: chem_aleb@mail.ru

Abstract

In this work, studies were carried out on sorption treatment in dynamic conditions of the model solution of copper ions (II) sorbing material obtained by the treatment of sediment biological wastewater treatment with low-temperature pyrolysis. Research conducted for fractions with particle sizes less than 0.5 mm and 0.5-1 mm, 1-2 mm, 2-3 mm, 3 mm or more. Dynamic sorbing of the model solution was carried out through a product of pyrolysis with a certain size of particles filled in a column with a diameter of 10 mm, the mass of sorbent was 2 grams, the height of filling the column 10-12 cm. The speed at which the model solution is filtered through the column depends on the size of the particles of the sorption material. As the particle size increases, the filtration rate increases, but the efficiency of copper ions removal decreases. Degree of sorption of copper ion solution with initial concentration of 1028 mg/dm^3 amounted to 94.6% for fraction of pyrolysis product with particle size 1-2 mm, 91.6% – less than 0.5 mm, 92.1% – 0.5-1 mm, 91.2% – more than 2 mm respectively. To compare the degree of sorption for BAU-grade coal amounted to 93.1%. Speed of filtering for BAUgrade coal amounted to 10 mL/min.

Introduction

The current issue is the protection of the environment from pollution, the development of resource-saving and waste-free technologies. At the same time, the use of circulating water supply systems and the treatment of domestic and industrial wastewater is an important and demanding task. As a result of household and industrial activity of the person waste in the form of sewage is formed. Wastewater, combining industrial, domestic and atmospheric, is a source of pollution of urban areas. [1]. All types of wastewater require pre-treatment before discharge into ponds, due to the content of various pollutants in them, the concentrations of which often exceed the maximum permissible. For extraction of heavy metal ions (HMI) from the treated water, the reagent method is widely used, which is based on the introduction of chemicals into the aqueous medium that accelerates the processes of agglomeration and deposition of pollutants. Coagulation and flocculation facilitate the removal of formed colloids by concentrating them into flakes and floccules, followed by separation by settling, flotation and filtration.

Conclusion

The copper ion removal efficiency of the solution depends on the particle size of the sorption material obtained sludge pyrolysis. Increasing the size of the particles leads to a decrease in the efficiency of purification of copper ions. Removal efficiency also depends on the size of the particles of the dispersed phase modeling solution. The sorption process flows through the layer of sorption material with particle sizes 1-2 mm during filtering through the column under dynamic conditions, we recommend that you use for the preliminary purification of wastewater

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