T H Y Tebbutt (Auth.)'s Basic Water and Wastewater Treatment PDF

By T H Y Tebbutt (Auth.)

ISBN-10: 0408709375

ISBN-13: 9780408709378

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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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.

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Basic Water and Wastewater Treatment by T H Y Tebbutt (Auth.)

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