What is the concentration of cod in the effluent

Assignment Help Civil Engineering

Reference no: EM13313455

The half-saturation constant (kinetic constant) of the Monod equation which governs the reactions in an activated sludge tank is 250 mg of COD per Liter. The maximum specific growth rate of the organisms driving this reaction is 5.0 days -1 and the growth rate is 0.54 day-1. The activated sludge tank has a volume of 40 m3 and the flow rate into it is 400 m3/day. The Mixed Liquor Volatile Suspended Solids (i.e., MLVSS which is X) in the activated sludge tank has a concentration of 3.0 kg/m . Assume the death rate (kd) is zero. (a) What is the: 3
(a) hydraulic retention time (in days), and
(b) concentration of COD in the effluent (in mg/L)?

Reference no: EM13313455

Questions Cloud

Develop algorithms for explicit solution of kinematic eqtns : Develop algorithms for the explicit solution of the Kinematic Equations when applied to a problem of runoff from a plane surface subject to a steady rate of rainfall excess.

What are the ethical issues in case : Case study - "The BP Oil Spill and Mental Health" What are the ethical issues in case and who are the stakeholders and how are they impacted by this situation

What would be the absolute pressure of carbon dioxiode : What would be the absolute pressure, P in kPa, of carbon dioxiode at 20 degrees celcious if the specific weight of carbon dioxide at 20 degrees celcious is 18 N/m^3 and the gas constant, R =1.889x10^2 J/kg*K.

Explain the equilibirum approach to calculate the ph : Need some assistance: 2a) Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH

What is the concentration of cod in the effluent : The maximum specific growth rate of the organisms driving this reaction is 5.0 days -1 and the growth rate is 0.54 day-1. The activated sludge tank has a volume of 40 m3 and the flow rate into it is 400 m3/day.

Calculate the magnitude of the frictional force : Two blocks with masses M1=7.90kg and M2=1.20kg are attached by a thin string which goes over a frictionless, Calculate the magnitude of the frictional force acting on M1

What is the concentration of mlvss in the activated sludge : The concentration of Chemical Oxygen Demand (COD) in the effluent from this system is 25 mg L-1. The growth rate of the organisms in this case is 0.9 days-1. The activated sludge tank has a volume of 50 m3 and the flow rate through it is 500 m3 da..

Explain the most mechanism of reactivity for the solvoysis : The most probable mechanism of reactivity for the solvoysis of 2-chloro-norbornane is: a. Sn1 b. Sn2 c. E1 d. E2 The reaction for this secondary compound was very slow going compared to solvolysis of benzyl chloride

What is the speed at which the satellite travels : A satellite is in a circular orbit about the earth (ME = 5.98 x 1024 kg). The period of the satellite is 2.11 x 104 s. What is the speed at which the satellite travels

User Account

All Pages