By T H Y Tebbutt (Auth.)
This quantity goals to mix the purposes of straightforward programming in uncomplicated with an knowing of these facets of water/wastewater remedy engineering that are expressed by means of mathematical relationships or which require a decision-making series. Waste and wastewater remedy is a vital sector of engineering and the themes chosen illustrate the multidisciplinary features of the topic. The courses were written in uncomplicated on an Amtrad PC1640
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Additional info for Basic Water and Wastewater Treatment
Most organic compounds and micro organisms and some inorganic compounds are degraded by natural processes of self-purification, so that their concentrations decrease with time. This type of pollutant is termed nonconservative, and the actual rate of decay is a function of many factors, including the particular pollutant, the quality of the receiving water, temperature and other environmental factors. 2) where c, = pollutant concentration at time t C() = pollutant concentration just below discharge at r = Ü Κ = decay constant for that particular pollutant and temperature Many inorganic substances are unaffected by self-purification reactions, so that the concentration of pollutant below the discharge point does not change with time unless further dilu tion water is added in the form of tributary flows with a lower concentration of the pollutant.
Y E n t e r v e l o c i t y of flow below d i s c h a r g e (m/s)? 2 Enter d i s t a n c e d o w n s t r e a m for d e c a y cale (km)? 3 E n t e r d e c a y c o n s t a n t (base 10 p e r d a y ) ? 15 Pollutant concn at 3 km d o w n s t r e a m = 8 . 6 1 7 3 8 3 m g / 1 A n o t h e r decay calculation (Y/N)? 2 REA ER: reaeration calculations Write a program to take data from a deoxygenation study on a stream and calculate the reaeration coefficient. T h e user should then be able to use the calculated coefficient to predict condi tions when the initial dissolved oxygen in the reach is different, reach is different.
7) where and are D O deficit and ulfimate B O D respectively just below the point of mixing. lk\\ - D,ik. 10) = critical deficit at time r,.. To use the above model, known as the Streeter Phelps equa tion, it is necessary to know the B O D rate constant and the reaeration constant for the particular stretch of the river under consideration. If the B O D and D O levels upstream of the discharge are known together with the equivalent values for the discharge, mass balances give the B O D and D O immediately downstream of the discharge point.
Basic Water and Wastewater Treatment by T H Y Tebbutt (Auth.)