Purchase Solution

Calculating Concentration of Bacteria

Not what you're looking for?

Ask Custom Question

Please see the attached Word file and help answer the questions regarding concentration of bacteria in a water reservoir.

Attachments
Purchase this Solution
Solution Summary

Using calculas, expression for concentration of bacteria in a water reservoir is estimated. Water with bacteria is continuously added in the reservoir and also being used by human society.

Solution Preview

Mass of bacteria added/time, k = 0.02*60000 = 1200 gm/day
Water in reservoir W = 400,000
At t =0, mass of bacteria in reservoir,
yo = 0.005*W = 0.005*400000 = 5*400 = 2000 gm

In dt time water added dW, such that,
r = dW/dt = 60,000 m^3/day

At t, mass of bacteria = y(t)
At t+dt, mass of bacteria,due to adding water:
y(t+dt) = y(t) + kdt

Total volume of water becomes = W + dW

Concentration of bacteria = (y(t) + kdt)/(W+dW)

same amount of water (dW) taken out of the reservoir in dt time, ...

Solution provided by:
Amrit Lal Ahuja, PhD (IP)
Education
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
Recent Feedback
  • " In question 2, you incorrectly add in the $3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
  • "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
  • "Answer was correct"
  • "Great thanks"
  • "Perfect solution..thank you"
Purchase this Solution
Free BrainMass Quizzes
Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.

Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

Geometry - Real Life Application Problems

Understanding of how geometry applies to in real-world contexts

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

View More Free Quizzes
Related BrainMass Solutions

  • Determination of sensitivity of bacteria

    The point where bacteria touch the strip indicates the minimum inhibitory concentration (MIC) of the bacteria. Therefoer the MIC is a value that tells you the minimum concentration of the antibiotic required to inhibit the bacteria.

  • Calculating Growth Kinetics in a Batch Reactor

    At what value of S (the substrate concentration) will dX/dt=0.

  • Real-Life Models of Logarithmic Functions.

    Log plots are also used in the study of the rates of reactions; for many reactions, the log of remaining reactant concentration versus time is linear.

  • Chemical disinfectant, zone of inhibition, bacteria vs virus

    The KB method relies on: 1) Diffusion of the antibiotic through the agar gel and subsequent concentration at a given point away from the source of the antibiotic 2) Sensitivity of bacteria to the antibiotic 3) Chemotaxis Depending on the size of

  • Dilution and Colony-Forming Units

    You are making dilutions to find a concentration, after which you will have colony forming units. Colony forming units are colonies of bacteria that form from the replication of a single bacteria.

  • Antibiotics are selective for bacterial cells

    Some antibiotics are also dosed in such a way that they are able to harm bacteria, but do not have a high enough concentration to harm human cells.

  • Control of Growth and Viability

    When the external environment have a low pH, the concentration of H+ is greater outside than inside, and H+ will move into the cytoplasm of the bacteria lowering the cytoplasmic pH.

  • Characteristics of Selective and Differential Media.

    Mannitol Salts agar is used to aid in the identification of Gram positive bacteria. The media contains the high salt concentration as the selective agent to inhibit Gram negative bacteria.

  • Calculating Bacterial Numbers in Culture

    In lag phase bacteria will not divide. Hence, number of bacteria in 1 liter will be 4 x 1000 = 4000 Since generation time is 20 minutes, hence, a. No. of cells after 1 hour 20 min = 2 x 4000 = 8000 b.

View More Related Solutions