Water Waste Treatment Flashcards
define BOD
amount of dissolved oxygen used by microorganisms in the oxidisation of biochemical organic matter
define COD
measure the content of organic matter of both wastewater and natural waters that can be chemically oxidised
define TOC
measure for organic matter present in water
What does Monod Growth Kinetics equation show and what is the equation
Nutrient concentration dependancy
What does yield coefficient show?
ratio between rate of generation of substrate and rate of consumption
What does cell age show?
rate of decay of a cell.
what is the equation for rate of substrate utilisation of a microorganism
r(su)= So-S/tao or
r(su)= -kXS/Ks+S
define activated sludge
produced in raw or settled activated wastewater by growth of organisms in aeration tanks
draw a diagram showing an activated sludge system
define organic load
pounds of organics (BOD) coming into the aeration tank
define cell residence time
total MLVSS/ total MLVSS wasted
define sludge volume index
mLs settled in 30 mins/ MLSS conc (grams/L)
define sludge density index
grams/L/ mLs settled in 30 mins/ 1000
whats the streeter phelps equation
Draw the SO sag curves
