preview

A Brief Note On The And Its Effects On The Wastewater Treatment

Best Essays

Executive Summary Severodvinsk has its economy based on industry, mainly in shipbuilding yards, civilian vessels construction and repair, manufacture of marine tools and the most important submarine, nuclear submarines and military equipment. Severodvinsk is situated on the shore of two different water sources: White Sea and Northen Dvine River. There are around five months with relative high temperatures when the snow will melt, raising the volume of river and sewage. Saying that separate system is useful to guarantee a low variation of flow into the sewage. The unit will be based on a preliminary, primary, secondary and tertiary treatments as for this project the pre-treatment for industrial wastes will not be considered, even though …show more content…

Saying that, some assumption must be taken. The design is supposed to meet the demand of whole year with low variation of efficacy. Waste water treatment plants consists on a series of processes and units to produce a specific effluent of known composition and flow rate. These treatments are essential to deal with domestic, industrial and agricultural contaminations and pollutants mainly considering solids of organic nature. The main focus on this design will be organic compounds in the domestic waste water – BOD (Biochemical Oxygen Demand) and TSS (Total Suspended Solids). Based on the Royal Commission for UK and Ireland the concentrations of effluents to be disposed on receiving water are 20mg/L for BOD5 and 30mg/L for TSS as theses parameters apparently would not cause any harm and will not be favourable for other process such as eutrophication. Considering that Severodvinsk is situated close to the Dvina River and White Sea these concentrations does not need to be highly restricted once that there is plenty of water available for further dilutions. Is important to have in mind that low parameters involves high investments in processes and equipments. Before start designing the processes itself is essential to understand the flows and concentrations of BOD5 and TSS that are running into the units. Some

Get Access