The Latest Research in Mongolia on the Utilization of Coal Combustion By-Products

With a geological reserve of over 170 billion tons, coal is the most abundant energy source in Mongolia with six operating thermal power stations. Moreover, in Ulaanbaatar city over 210000 families live in the Ger district and use over 800000 tons of coal as a fuel. The three thermal power plants in Ulaanbaatar burn about 5 million tons of coal, resulting in more than 500000 tons of coal combustion by-products per year. Globally, the ashes produced by thermal power plants, boilers, and single ovens pose serious environmental problems. The utilization of various types of waste is one of the factors determining the sustainability of cities. Therefore, the processing of wastes for re-use or disposal is a critical topic in waste management and materials research. According to research, the Mongolian capital city's air and soil quality has reached a disastrous level. The main reasons for air pollution in Ulaanbaatar are reported as being coal-fired stoves of the Ger residential district, thermal power stations, small and medium-sized low-pressure furnaces, and motor vehicles. Previously, coal ashes have been used to prepare advanced materials such as glass-ceramics with the hardness of 6.35 GPa, geopolymer concrete with compressive strength of over 30 MPa and zeolite A with a Cr (III) removal capacity of 35.8 mg/g. Here we discuss our latest results on the utilization of fly ash for preparation of a cement stabilized base layer for paved roads, mechanically activated fly ash for use in concrete production, and coal ash from the Ger district for preparation of an adsorbent. An addition of 20% fly ash to 5-8% cement made from a mixture of road base gave a compressive strength of ~ 4MPa, which exceeds the standard. Using coal ashes from Ger district prepared a new type of adsorbent material capable of removing various organic pollutants from tannery water was developed. This ash also showed weak leaching characteristics in water and acidic environment, which opens up an excellent opportunity to utilize.

Исследование возможностей оценки состояния структуры металла трубопроводов, находившихся в эксплуатации, ультразвуковым методом

Results of the first stage of ultrasonic researches of structure of metal of pipelines of the thermal power stations which are taking place in operation are submitted. Metal of marks of steel was exposed to tests: 15Х1М1ФИ and the St. 20 with a various operating time (time of operation). Samples of metal were exposed metallographic to the analysis, on the basis of given which (medium-sized grains , dispersions of distribution lnD — σD) theoretical calculation of parameters OUSE of pulses of a bottom signal in metal is carried out. The quantitative data on influence of thickness of a layer of a contact liquid between the probe and object of the control on working frequencies 5,0, 7,5 and 10 MHz for various medium-sized values of a grain of metal are received. Examples of settlement and experimental pulses and spectra of signals for frequency 5 MHz are given.

Brazil's electricity costs will rise amid supply fears

Significance The controversial privatisation comes as warnings of potential energy disruption increase due to the longest dry spell in the Central and South-east regions for 91 years. The water crisis has forced a shift to thermal power stations, whose higher costs push tariffs upwards. Impacts Higher energy tariffs will drive inflationary pressures this year. Eletrobras’s privatisation may occur early next year, but could increase energy prices. Significant energy investments are required to avoid future power disruption.

Impact of Thermal Power Pollution on Livestock: A Multivariate Analytical Interpretation from Confronting Social Ecology

Thermal power stations are now considered as the foremost global concern as these are responsible to produce detrimental effects on the environment. Environmental Impact Assessment (EIA) is a process of evaluating the likely environmental impact so proposed project or development, taking into account inter-related socio-economic, cultural and human-health impacts, both beneficial and adverse. In this study, the perception of certain(60)farmers in 5 villages of Kolaghat block of Purba Medinipur, West Bengal, India are recorded and analyzed on the basis of their knowledge and views about thermal power, environment and about their individual enterprises. There are 10 independent variables-ages (x1), education (x2), family Member (x3), income (x4), homestead land (x5), total Land (x6), land under Boroj (x7), input cost (x8), and livestock number (x9), distance of villages from Kolaghat Thermal Power Station (x10) and 1 dependable variables- 1) perceived impacts of Kolaghat Thermal Power Station on livestock(y3).It has been found that toxic elements and fly ash from Kolaghat Thermal Power Station have several consequences upon local environment, human, agriculture and livestock. It has also revealed that Kolaghat Thermal Power Station hampers the social ecology of the local areas. The study has further suggested several recommendations to cope with adverse environmental and ecological condition.