Career Episode - Civil

Topics: Sewage treatment, Sewage, Water purification Pages: 5 (1292 words) Published: March 30, 2013
Career Episode 3

a) Introduction

This career episode describes my working activity from September till October 2xxx. I was working as a group leader at the design of water-supply and sewerage works and networks of the FFF Bauxite Mine and of a town situated in Komi Autonomous Republic.

b) Background.

After reviewing the background data I had to define water-supply sources, to calculate water consumption for domestic, industrial and fire safety purposes of the mine industrial area and the town. I also had to estimate sewage runoff and to select appropriate water and sewerage works. I had to foresee the measures devoted to environmental protection. As usual I closely collaborated with relative specialists- prospecting specialists, electrical engineers, water engineers and metallurgical specialists.

For this design I carried out all the necessary calculations, developed the principal main water-supply and sewerage works schemes, water consumption and water removal balance schemes. All the calculations were carried out on a computer. While I was working on the project I took part in the negotiations with the customer, where we discussed the engineering and environmental protection problems. After completing my work I gave the explanatory note to my customer for approval.

c) Personal workplace activity.

For this design I studied a lot of materials which contained the information about hydrological, geological and climatic parameters of the designed industrial site area. I analysed accounts of preliminary and detailed groundwater prospecting for household water-supply. The careful study of this information made it possible for me to offer the disposition of water-intake works ( artesian wells ) not at the place recommended at the preliminary prospecting. That fact excluded the possibility of chemical and bacterial contamination of the water supply source.

I carried out the calculations of water consumption for domestic, industrial and fire safety needs. On the basis of these calculations I developed the water-supply scheme. This scheme was as follows:

Water from the water-intake wells is distributed by the pumps to the regulating reservoirs intended for the water collecting before the pumping station of the second raising. The pumps at the pumping station of the second raising discharge water from the regulating reservoirs to the reservoirs where fire-proof, emergency and controlling reserve of water is kept. From the reservoirs the water flows under gravity to the circular network. I made provision for a special installation of the regulating valves with the electric drive in the wells near the tanks in order to pass the fire safety reserve of water.

In this project I made an important decision regarding environmental protection. I offered to disinfect potable water at the bactericidal plants. Besides, I foresaw the reserved disinfection of water with the solution of natrium hypochlorite obtained from the solution of salt in the electrolyses. For this design we (my group under my direction) worked out the borders of sanitary protection zones for water-supply sources and water storage tanks. We kept in view the further development of our object. We also included all the sanitary steps around the zone territory according to the construction standards and rules.

On the industrial areas of the mine I designed the recycling water supply systems for a diesel power station, for a crushed stone factory and for a car-washer. I estimated and selected the following works and networks of the recycling water supply systems: recycling water-supply pumping stations, water-cooling towers, car-washer sewage water treatment plants, recycling water pipe-lines. These recycling water supply systems allowed to reduce fresh water consumption. The recycling water supply systems make 92 percent of the whole mine water-supply in this design.

I also calculated the following sewerage systems:...
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