Browsing by Author "Ariuntuya Tserendorj"
Now showing 1 - 12 of 12
Results Per Page
Sort Options
Item Arsenic monitoring in nalaikh’s surface waters particular “bus nuur” lake(German Mongolian Institute for Resouce and Technology, 2018-05-31) Sainsanaa Amarsanaa; Ariuntuya Tserendorj; Daniel KartheNalaikh is located in Ulaanbaatar, Mongolia, known for illegal mining activity. Earlier investigations concerned mining land disturbance and pointed on air, soil and importantly water. Which revealed in unexpected arsenic, which is a highly toxic element, exposure in the Bus Lake. The research is aimed to find seasonal and weather changes of the Bus Lake characteristics and indicating level of toxicity.Item Assessment of Land Use effects on Tuul River surface water Quantity and Quality(German Mongolian Institute for Resouce and Technology, 2022-05-16) Bolorchimeg Turkhuu; Ariuntuya Tserendorj; Byambakhuu IshgaldanThe Tuul river basin is a unique region in that it covers only 3.2% of Mongolian territory, but 48% of Mongolian total population lives in Ulaanbaatar. Also, 66.5% of the Mongolian total GDP was produced within this river basin in 2020. Land-use changes due to the expansion of urbanization can pose a threat to downstream ecosystems of the Tuul river, particularly soil and water quality, leading to an increase in surface runoff and nutrient loads. The main purpose of this study is to evaluate the impacts of land-use and land cover changes in discharge and water quality in the upper part of the Tuul river basin between 2010 and 2019. Land use/land cover changes, digital elevation model, soil, and meteorological data were used as an input data for the Soil and Water Assessment Tool (SWAT) to simulate streamflow and water quality. The model’s performance was determined by statistical parameters including Nash-Sutcliffe efficiency coefficient (NSE), correlation coefficient (r), and percentage bias (PBIAS). Furthermore, prediction uncertainty was measured using the p-factor and r-factor. The values of NSE (0.56 and 0.66) and r (0.77 and 0.82) for calibration and validation periods at a daily time scale showed that the SWAT model could be used to simulate the discharge. The results of calibrated model showed the increase in surface runoff, and loads of nitrate and phosphorus due to rapid urbanization in the Tuul river basin. The outcomes of the study can be useful in understanding water management strategies and making more appropriate land management decisions and practices.Item Determination of Arsenic, Lead, and Chromium in wastewater(German Mongolian Institute for Resouce and Technology, 2021-03-01) Duurenbayar Lkhamkhuu; Erdenejargal Yura; Ariuntuya Tserendorj; Dorjsundui GombokhurtsThe purpose of this thesis is to make statistical analysis for arsenic, chromium, and lead content in municipal wastewater of Ulaanbaatar data of years in which there is a significant relationship (namely pH, and temperature of wastewater) between the heavy metals and seasonal conditions with sample locations. Therefore, the concentrations of these metals can be met with the permissible levels set by the World Health Organization (WHO) and Mongolian standards of municipal wastewater. To expand the scope of the study, the sampling point’s locations were considered given the ambient condition and the study area comprises the Tull River Basin in Ulaanbaatar, which receives treated wastewater of Central Wastewater Treatment Plant (CWWTP. The data analysis procedure was performed as shown in Figure 1. The in-situ measurements were obtained from the 10th of March, 2010 to the 10th of April, 2015.Item Determination of Deoxygenation Rate Constant for BOD Reaction in Mongolia(German Mongolian Institute for Resouce and Technology, 2019-05-03) Sanchirgarav Batzorig; Ariuntuya Tserendorj; Daniel KartheThe objective of this study was to estimate the deoxygenation rate constant and the ultimate BOD of WWTP effluent in Mongolia. The deoxygenation rate was determined and tested in April, 2019. The Deoxygenation rate was 0.31 /day which is a bit higher than values from other countries. The ultimate BOD was in the range of 92- 115 mg /L. Biological oxygen demand values did not meet the limits recommended by the Mongolian National standard throughout entire study period. This knowledge of ultimate BOD, the rates of deoxygenation in BOD reaction can be significantly valuable for designing reliable of biological treatment processes in WWTP.Item Determination of deoxygenation rate of selbe river and its purification study(German Mongolian Institute for Resouce and Technology, 2022-05-16) Usukhbayar Puntsagsuren; Ariuntuya Tserendorj; Gerelt-Od DashdondogMongolian people have a proverb “Water is a wish granting jewel” or “Ус бол чандмань эрдэнэ”, which specifies that Mongolians have been living near to the water sources by cherishing, protecting and worshiping water for the generations. The water resources in Mongolia are about 599 km3/year, which is 0.00004 percentage of the world total water volume (1). Furthermore, rivers, lakes, and swamps are known as surface water, which makes up only 0.26 percent of all fresh water on our planet (2). On the other hand, the total water resources in rivers or streams in Mongolia are estimated at 34.6 km3/year, as of 49% form up in the Arctic Ocean basin; 11 percent to Pacific Ocean basin and 40% belongs to Central Asian closed basin (Figure 1).(3). Additionally, in Mongolia there are total of 29 river basins (Figure 1) including surface and groundwater basins (4).Item Dissolved oxygen and bod assimilative capacity of the Selbe river(German Mongolian Institute for Resouce and Technology, 2023-05-15) Bodigerel Lkhagvasuren; Ariuntuya Tserendorj; Ariunaa SaraadanbazarMongolia is a landlocked country in Central Asia with a land area of 1’564’116 square km that shares borders with both China and Russia to the north and south, respectively. The total surface water source in Mongolia is around 599 𝑘𝑚3, about 0.00004% of the world’s total water resource. 83.7% of it is accumulated in lakes, 10.5% in glaciers, and 5.8% in river and river systems. Water source in Mongolia is limited and unevenly distributed throughout the whole country, most of the surface water sources are located in Northern Mongolia, as for the Gobi Desert zone majority of the water source is from groundwater. The Mongolian water resource is divided into three main continental basins which are the Northern Arctic Ocean basin, the Pacific Ocean basin, and the Central Asian Internal basin. Furtherly, these three basins are divided into 29 river basins which are both surface and subsurface water basins, shown in Figure 1.Item Dissolved oxygen and bod assimilative capacity of the selbe river(German Mongolian Institute for Resouce and Technology, 2023-05-15) Bodigerel Lkhagvasuren; Ariuntuya Tserendorj; Ariunaa SaraadanbazarMongolia is a landlocked country in Central Asia with a land area of 1’564’116 square km that shares borders with both China and Russia to the north and south, respectively. The total surface water source in Mongolia is around 599 〖km〗^3, about 0.00004% of the world’s total water resource. 83.7% of it is accumulated in lakes, 10.5% in glaciers, and 5.8% in river and river systems. (1) Water source in Mongolia is limited and unevenly distributed throughout the whole country, most of the surface water sources are located in Northern Mongolia, as for the Gobi Desert zone majority of the water source is from groundwater. The Mongolian water resource is divided into three main continental basins which are the Northern Arctic Ocean basin, the Pacific Ocean basin, and the Central Asian Internal basin. Furtherly, these three basins are divided into 29 river basins which are both surface and subsurface water basins, shown in Figure 1. (2).Item Oxidized copper ore leaching with glycine(German Mongolian Institute for Resouce and Technology, 2021-05-28) Munkhbat Munkh-Erdene; Bayanmunkh Myagmarsuren; Ariuntuya TserendorjIn this bachelor thesis, new leaching agent glycine is introduce. We have done two different experiment in order to determine kinetics, leachability, favorite proportion of parameters including concentration of glycine, pH value and oxidizing agent. Firstly, copper minerals were bottle rolled in alkaline glycine solutions under ambient conditions with different parameters. Result of bottle roller test, we assumed the most favorable condition at pH value of 9, H2O2 is 0.5% and Cly5:Cu1 with copper extraction of 34% after 48h. The leaching kinetic investigations for malachite carried out in a glass reactor whereby process variables could be controlled, higher copper extractions rates were obtained. Kinetic analysis of malachite showed that the leaching processes are both controlled by diffusion through the product layer.We made assumptions and calculations for the experiments based on current literature and project.Item Prediction of Reaeration and Deoxygenation Rate Constant in Selbe River, Mongolia: Dissolved Oxygen and BOD Assimilative Capacity of the River(SciTechnol Journal, 2024) Ariuntuya Tserendorj; Bodigerel Lkhagvasuren; Usukhbayar Puntsagsuren; Gerelt-Od Dashdondog2In rivers, the processes of deoxygenation and reaeration play major roles in self-purification, particularly influenced by temperature changes. This study is the first to consider Mongolia's river's Dissolved Oxygen (DO) and Biochemical Oxygen Demand (BOD) assimilative capacity. The objective of the study was to determine the deoxygenation rate (k1) and the reaeration rate (k2) constants of the Selbe River, in Ulaanbaatar, Mongolia. The mean k1 was calculated using two models, namely the Thomas slope and firstorder function methods. The results showed that the first-order function model was more suitable for describing k1, which is 0.116 ± 0.012 and 0.266 ± 0.0281 respectively in 10 and e of logarithm base because the sampling standard deviation of the model we used is more reliable than the Thomas method. The mean k2 was estimated by 8 models out of 22 different available models. Jha’s model was more reasonable because it had the lowest sampling standard deviation compared with other models. Accordingly, the mean k2 in the Selbe River was found to be 3.41 ± 0.67 at 4.97 mean temperature of Celsius. As a result of using k1 and k2, there is 0.7 mg/L of mean critical oxygen deficit, 0.3 d of critical time and4.7 km of the longest distance using the purification model for steady-state at 20ºC because non-point pollution sources occurred in most sampling points. Additionally, considerations should include the trend towards stronger rainfall events, changes in land use density with an increasing number of pit latrines, variations in soil types and the presence of private wells, all of which are potential drivers of changes in water hygiene.Item The Investigation of Settling Processes for Tailing Thickener in Oyu Tolgoi(German Mongolian Institute for Resouce and Technology, 2020-06-08) Otgonzul Bat-Erdene; Renchinsambuu Ganzam; Ariuntuya Tserendorj; Battulga NasanjargalThis bachelor thesis based on the research work of Oyu Tolgoi (OT) LLC that OT concentrator’s tailing thickener laundry for overflow water pipe scaling problem. OT concentrator plant is reused the overflow water from the tailings thickener and its recycling rate is at least 80 %. Tailing thickener plays the main role to produce clarified effluent and thickened sludge. The most considerable issue of performance tailing thickener is the sedimentation in which is the utilization of tailings; thus, it is very important to determine its settling process. This study aimed to investigate the parameters that aspect the settling process of tailings solution. This thesis presents the results of a study conducted on settling processes of copper mineral tailings. Moreover, the following goals were expected to investigate the tailing solution characteristics, make assumptions about the scale formation causes on the case, and suggest scaling removal and preventing environmental way.Item The Investigation of Settling Processes for Tailing Thickener in Oyu Tolgoi(German Mongolian Institute for Resouce and Technology, 2020-01-30) Otgonzul Bat-Erdene; Battulga Nasandorj; Ariuntuya Tserendorj; Battulga NasandorjThis bachelor thesis based on the research work of Oyu Tolgoi (OT) LLC that to solve problem which is generating a scale in riser pipe of tailing thickener during settling processes. OT concentrator plant is reused the water from the tailing thickener and recycling water is more than 80 %. Tailing thickener plays main role as produce clarified effluent and it is used for reuse water in processing plant. Performance of tailing thickener is most considerable issue and their settling is the first step in the utilization of tailings; thus, it is very important to determine their settling behavior. The aim of this study was to investigate the parameters that aspect settling behavior of tailings solution with different conditions. This thesis presents the results of a study conducted on settling processes of copper mineral tailings. Moreover, the following goals will be expected, investigate the tailing solution charecteristics, make assumption the scale formation causes on the case and suggest scaling removal and preventing environmental way.Item The present work was submitted to the Faculty of Engineering(German Mongolian Institute for Resouce and Technology, 2020-06-08) Galsanjamts Otgonbaatar; Ochirbat Purevjav; Bayanmunkh Myagmarsuren; Ariuntuya TserendorjIn copper processing, copper bearing sulfide minerals in porphyry deposit that can be efficiently processed by the froth-flotation cells then recovered by smelter. Copper mainly occurs in porphyry deposit with gold, silver and molybdenum. Most currently, research interest has moved to the processing low-grade, oxidized, complex ore bodies and flotation tail from copper processing that contains impurities including silica, iron, arsenic which forms the crud which negatively influence downstream processes like solvent extraction of hydrometallurgical plant. The conventional sulfuric acid for leaching low-grade copper oxidized ores is inefficient in the treatment of the proposed ore contains gangue metals and minerals like iron, silica, aluminum and carbonates results in increased reagent consumption and increased operating costs. In addition to these technical challenges, the use of sulfuric acid impacts on environment negatively including vaporization and contamination of ground water.