Wyniki wyszukiwania - BazTech

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Wastewater Treatment Methods and Sewage Treatment Facilities in Almaty, Kazakhstan

Ospanov Kairat, Kuldeyev Erzhan, Kenzhaliyev Bagdaulet, Korotunov Anatoly

Journal of Ecological Engineering

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2022

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Vol. 23, nr 1

240--251

EN

The results of comprehensive research on the status of sewage treatment in Almaty are presented in this article. The results of the reconstruction and modernization of treatment facilities intended to improve the sewage treatment efficiency, including the results of pretreatment of wastewater with excess sludge in the primary clarification tank, and the results of hydrobiological and microbiological analysis of activated sludge in the aeration tank are presented. The analysis of the study results of the chemical composition of incoming, clarified and treated wastewater is presented. Besides, the results of the analysis of the water balance of wastewater are presented.

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Study of Electroflotation Beneficiation of Low-Sulphide and Refractory Gold-Bearing Raw Materials

Berkinbayeva Ainur, Atanova Olga, Kenzhaliyev Bagdaulet, Efremova Yuliya

Journal of Ecological Engineering

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2022

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Vol. 23, nr 11

95--100

EN

The paper presents the results of experiments with electroflotation beneficiation of gold-bearing raw materials. Three variants of ore samples with 0.56, 1.2 and 5.9 g/t gold grades, which also have different mineralogical and phase composition, were taken as objects of study. Based on the ionization effects, as well as changes in electrostatic and electrokinetic properties of the flotation pulp components, different electrode locations in the flotation chamber were considered. Experiments have shown that for electroflotation processing of raw materials with weakly acidic and neutral medium, positive electric potential of pulp, as well as raw materials with complex mineralogical composition, the negative electrode (cathode) should be placed at the surface of foaming and concentrate assembly, and the positive electrode (anode) in the pulp flow. For electroflotation of raw materials with neutral, alkaline pH and negative electric potential of the pulp, the anode is placed at the surface of the concentrate formation and the cathode is placed in the pulp flow. Thus, additional electrolytic treatment of mineral slurry in the flotation process can increase the gold recovery in the flotation concentrate by an average of 20–30%.

3

Research Results of a Complex Reagent for Wastewater Purification from Hydrogen Sulfide

Ospanov Kairat, Kuldeyev Erzhan, Kenzhaliyev Bagdaulet, Kuldeyeva Elmira

Journal of Ecological Engineering

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2022

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Vol. 23, nr 5

278--285

EN

This article presents the results of research intended to obtain a complex alumina-iron reagent based on natural diatomite and industrial products of alumina production for wastewater purification from hydrogen sulfide. The material composition of the obtained samples using X-ray diffraction analysis was determined. The results of interaction research in the NaFeO2 – H2S – H2O system at 25°С are given. The results of research on wastewater purification from hydrogen sulfide in Almaty city with the use of ferric sulfate, ferric chloride, sodium ferrite and a complex reagent containing iron at the content of 5.1 mg/l H2S in the initial sample of wastewater were presented.