# Ideal Reactor Design Equations and Formulas Calculator

## Chemical Engineering Wastewater Water Treatment

Solving For Theoretical Mean Residence Time

#### Inputs:

 reactor volume (V) meter^3barrel UKbarrel US drybarrel US federalbarrel US liquidbarrel US oil petroleumbushel UKbushel US drycentimeter^3cord firewoodcord foot woodcup Canadacup metriccup USdeciliterdecimeter^3foot^3gallon UKgallon US liquidinch^3kilometer^3litermillilitermillimeter^3ounce UK fluidounce US fluidpint UKpint USquart UKquart USsteretablespoon UKtablespoon USteaspoon UKteaspoon USyard^3
 flow rate (Q) meter^3/secondcc/hourcentimeter^3/secondcentimeter^3/hourdeciliter/minutefoot^3/minutefoot^3/secondgallon/minuteliter/dayliter/minuteliter/secondmeter^3/daymeter^3/minutemilliliter/hourmilliliter/minute

#### Conversions:

 reactor volume (V)= 0 = 0meter^3
 flow rate (Q)= 0 = 0meter^3/second

#### Solution:

 theoretical mean residence time (tR)= NOT CALCULATED

#### Other Units:

Change Equation
Select to solve for a different unknown

Residence Time
 theoretical mean residence time reactor volume reactor flow rate

Step input for completely mixed or
continuously stirred tank reactor CSTR
 concentration initial concentration time theoretical mean detention time

Pulse Input for completely mixed or
continuously stirred tank reactor CSTR
 concentration initial concentration time theoretical mean detention time concentration at n tank in series

Plug Flor Reactor PFR
 step input: when t < tR, C = 0 when t >= tR, C = C0 pulse input: when t = tR, C = C0 when t < tR, C = 0 when t > tR, C = 0

Where
 tR = theoretical mean residence time V = reactor volume Q = reactor flow rate C = concentration at time C0 = initial concentration Cn = concentration at tank n t = time n = number of tanks

References - Books:
1) Warren Viessman and Mark J. Hammer. 1993. Water Supply and Pollution Control. Harper Collins College Publishers, Inc. 5th ed.

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By Jimmy Raymond

Contact: aj@ajdesigner.com