Question

2. Check whether or not the following statements are true (T) or false (F) (1.2 pts): ✓ ) BOD is a measure of biomass in the sample and carried out in a biological reaction. X (ii) COD is always less than BOD of the same wastewater sample. (iii) Sedimentation is the separation of dissolved particles that are heavier than water by gravity (iv) The settling of sand particles in a girt chamber is considered as Type I settling (v) Detention time for a particle can be calculated from the following equations: = Height of a tank (H)/terminal velocity of a particle (Vo) - Length (horizontal, L) of a tank/horizontal velocity of a particle (V) X (vi)The horizontal velocity through the tank should be equal to or larger than the scour velocity to avoid resuspension of the separated particles

Answer 1

2 ; "ture", Boo is a measure of biomass in the sample and carried out in a biological reaction. of the same (11) "false", COD is always grotere than Bod wastewater sample. ill) "ture sendimentation is the sepration of dissolved particles that are heavier than water by granty. ave geit chamber v "ture" The settling of sand particles in a is considered as type- I setting.