1-6 In a biological waste treatment system, solids may enter in the influent. be
ID: 51714 • Letter: 1
Question
1-6 In a biological waste treatment system, solids may enter in the influent. be created or destroyed by biological growth or decay. and may leave in the effluent. Con sider a waste treatment plant treating 1m^3/s of an influent containing 55 mg/L of degradable organic solids. The wastewater also contains l8Omg/L of dis solved organic carbon (DOC), which may be degraded. For every grain of dissolved organic matter that is degraded. the overall reaction converts a portion of the material into CO, and H,O, and another portion into 0.4 g of new biomass. Analytically, this biomass and the degradable solids in the influent are both quantified as volatile suspended solids (VSS); that is, the degradable solids in the influent and the new biomass that grows in the reactor air indistinguishable from one another.Explanation / Answer
The hydraulic retention time (HRT), also known as hydraulic residence time or t (tau), is a measure of the average length of time that a soluble compound remains in a constructed bioreactor.
Hydraulic retention time is the volume of the aeration tank divided by the influent flowrate:
http://www.lenntech.com/wwtp/calculate-hrt.htm
the above link will be useful to calculate
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