ENGINEERING SOLUTIONS
There are substantiates the relevance and practical importance of ballast water’s decontamination from pollution, aimed at preventing cross-border pollution of marine biological ecosystems, There are considered structure, methods and techniques, that used for create national management system ballast water of marine vessels of mixed navigation (river – sea).
There were presented principles of construction and design of complex electrolysis unit, generating on-site use at the same time chlorine-containing anolyte and sodium ferrate. Anolyte is used for water treatment in the municipal supply systems and industrial plants, and sodium ferrate to treat household and industrial wastewater, which after treatment can be discharge into environment without harm. There were substantiated proposed solutions of such unit to improve its performance and energy efficiency. There were offered practical solutions for the automation of anolyte and ferrate production process to control the parameters of the process and ensure its safety. Integrated electrolysis plant for the production of regents for the treatment of dinking water and wastewater has no domestic analogues and can provide competitive of domestic water treatment systems compared with foreign counterparts on the cost, performance and energy efficiency.
SCIENTIFIC DEVELOPMENTS
The study covers the possibilities of analysis of overburden rocks in the south of the Far East - a new alternative source of strategic metals - by plasma spectrometry. A rational sample preparation procedure based on melting samples with lithium metaborate was used to define macro and trace elements (from major up to Be, Sc, V, Cr, Co, Ni, Cu, Zn, Ga, As, Rb, Sr, Y, Zr, Nb, Mo, Cd, Sn, Cs, Ba, Hf, Ta, W, Pb, Th, U and rare earths) from one weighed portion. The concentration of noble metals was defined by the neutron activation analysis. The distribution of commercial elements at various stages of overburden rock processing was studied. The development of new analytical and beneficiation methods allows to outline solutions for the issue of developing a technology of extraction of commercial elements from overburden rocks in coal beds.
There were examined patterns of change in the chemical composition of geological formation at thermal effect on them in order to further their recovery; there was examined change in the content of heavy metals and biogenic elements in rocks at a variation of heating and firing parameters. Processing of oil and gas fields drilled rocks at temperatures up to 280 °C allows to remove from them oil without substantial changing the chemical composition and phase transformation of rocks, to increase the content of mobile potassium in clay rocks. It was found that sandstone and silt rocks – waste of 3rd class of hazard- after use of developed technology are ready to recovery and almost non-hazardous (5th class of hazard). Possible their use as artificial soil for land reclamation after the hydrocarbon spills.
The effect of alumina production red mud treatment with mineral acids and carbon dioxide has been examined to increase the sorption capacity with respect to copper(II) ions from acid aqueous solutions. The sorption and desorption processes of copper ions were studied, and the sorption properties of initial and modified muds were compared. The efficiency of removal of copper(II) ions from industrial contaminated water is due to the circumstance that such processes as ion exchange, dissolution of mud components, hydrolysis and coprecipitation take place simultaneously. It is shown that the use of red muds in the framework of development of technologies for utilization and neutralization of technogenic wastes holds promise.
This paper presents methods for the preparation of sorption materials from chitosan and effectiveness of sewage treatment from heavy metal ions. Shows the IR spectra of the obtained sorption materials. It is shown that the most effective treatment has a granular sorbent based on chitosan. The technological scheme of obtaining and using granular sorbent based on chitosan.
ANALYSIS. METHODS. PROGNOSIS
Content of catalytic cracking gasoline (GCC) in Russian blended gasoline is greater than 30 %. The most of sulfur in blended gasoline comes from GCC, while permitted sulfur content in commercial gasoline of Euro 5 standard is 10 ppm. High sulfur content of the GCC makes it impossible to use them without prior hydrotreating, inevitably reducing the octane number of gasoline. The nature of sulfur compounds that make the major contribution to the octane number was considered. An overview of modern technological processes and catalysts for hydrotreating of GCC was made. It was shown that modern gasoline desulfurization were based on pre-fractionation and separate purification of heavy and light fractions that made them technologically complicated and energy-intensive. Boreskov Institute of Catalysis together with AO “Gazpromneft-MNPZ” developed the catalyst and a single stage hydrotreating process of GCC. Developed catalyst provides selective hydrotreating of all GCC fractions without prefractionation to obtain gasoline with a sulfur content of no more than 10 ppm, and octane number loss not more than 1 point.
There were bringing results of summarizing field observations of the processes of dust formation on the waste dumps abandoned mines in Tula Region. There was shown that dusting intensity of waste dumps depends on particle size distribution, humidity of dust, wind direction and speed. There was found that еру majority of abandoned mines excess MPC of heavy metals in soils kin the dumps coverage area is not observed, with the exception of lead, exceeding the concentration of which is 8 MPC. Dust emissions pollute the atmosphere and lead to contamination of soils adjacent to the dump.
In early December 2015 on the platform number 10 at Guneshli oilfield in the Caspian Sea there was a pipeline rupture and fire a number of oil and gas wells. This is the third accident in Azerbaijan’s offshore oil and gas platforms in the Caspian Sea for the last three years. For the first time in the Russian practice for monitoring the emergency platform and environmental impact all possible means of remote sensing have been used. It includes an analysis of images of three radar and nine optical satellites. There was found that on the platform oil spills occurred, it is likely due to depressurization of burning a borehole. It has been shown that at present accidents with marine oil and gas facilities can effectively monitored from space.
There were considered topical issues of global environmental strategy for the energy sector. In a comparative perspective on the example of analysis of the characteristics of organic resources (natural gas and coal) are shown the competitive advantages of alternative fuels, taking into account technological and economic feasibility conditions. There were shown possibilities for improvement of fuel balance due to the shale and coal bed gas.
ISSN 2413-6042 (Online)