Development of a Rapid Method for Monitoring Biodeterioration of Petroleum Products and Technical Fluids. Part I.
- PDF / 577,772 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 74 Downloads / 230 Views
Development of a Rapid Method for Monitoring Biodeterioration of Petroleum Products and Technical Fluids. Part I. D. A. Sandzhievaa,*, E. M. Chudinovab, A. S. Elanskyb, S. N. Elanskyb,c, A. N. Udovichenkoa, A. A. Burovaa, M. P. Kirpichnikovc, and A. G. Dedova,d a
Gubkin Russian State University of Oil and Gas (National Research University), Moscow, 119991 Russia b Peoples’ Friendship University of Russia, Moscow, 117198 Russia c Biological Faculty, Moscow State University, Moscow, 119991 Russia d Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, 119991 Russia *e-mail: [email protected] Received September 3, 2020; revised September 11, 2020; accepted September 18, 2020
Abstract—Principles of a rapid method for monitoring biodeterioration of technical fluids were developed with metalworking fluids as examples. Physicochemical and operation properties of spent metalworking fluids were considered. The loss of the biological resistance of metalworking fluids leads to irreversible changes in the physicochemical and operation properties. A bank of test microorganisms required for validating the rapid method for monitoring biodeterioration was compiled. Keywords: metalworking fluids, corrosion-active microorganisms, corrosion action of metalworking fluids, biocorrosion, biodeterioration
DOI: 10.1134/S0965544121010138 Technical fluids based on petroleum products are widely used in machine-building, defense, aerospace, chemical, and petrochemical industries. Water-miscible metalworking fluids find the widest use in industry. They are subdivided into emulsion, semisynthetic, and synthetic fluids. Working solutions of water-miscible metalworking fluids contain, as a rule, from 2 to 15% concentrate consisting of mineral oils , polyhydric alcohols, esters, emulsifiers (fatty alcohols or amino alcohols), corrosion inhibitors (fatty acids, amines, borates), and other compounds as antiscuff additives, foaming inhibitors, and biocides. In the course of operation, water-miscible metalworking fluids (MWFs) are contaminated with microorganisms [1–4] capable of decomposing a wide range of MWF components. Uncontrollable growth of microorganisms in MWFs inevitably leads to their biodeterioration, which is manifested in premature loss of the MWF quality (durability), selective degradation of functional additives, and corrosion of the equipment and produced items [5]. It is known that more than 50% of all corrosion processes are attributed to the action of microorganisms. The corrosion loss is estimated at 4% of GDP in the United States and at 1% in Japan. The MWFs that
have lost their functional properties are subject to early replacement, which considerably increases the amount of the discharged wastewater [6], taking into account that the annual world’s consumption of water-miscible MWFs is estimated at 2 × 109 L [7]. The MWF biodeterioration also worsens the sanitary and hygienic conditions of the staff operation with MWFs, giving rise to occupational (allergic, lung, and skin) diseases. The efficien
Data Loading...
