Mrs. Smith, an elderly lady who lives next door to you, is concerned about her indoor air quality. Derive the steady-state indoor air quality model discussed in class to calculate the PM concentration within her home as a function of outdoor PM concentration, air flow through the house, penetration factor, particle deposition velocity, surface area, and removal rate through an indoor air cleaner. Mrs. Smith thinks the PM concentration inside her home is too high, so she purchased a SuperClean indoor air cleaner. Calculate the steady-state indoor air PM concentration using the parameter values below when the air cleaner is turned off, and with the air cleaner turned on. If the inactivation of Giardia is carried out in a CMFR with a residence time of 30 min, calculate the percent inactivation of the organisms that can be achieved.
Particle size is a key characteristic of particle behavior in aquatic and atmospheric systems.
Two streams enter a reactor and are blended together to form a common effluent stream. A wastewater sample is diluted 1 to 10 and a BOD test is conducted on this diluted sample. Use this information in the following question.