Environmental engineers and scientists are becoming concerned about pharmaceuticals in the environment. An antibiotic is discharged into a small lake at an influent concentration of 0.05 mg/L. The lake has a surface area of 1.5 acres and a mean depth of 6 feet. The flow into the river is 100 cubic feet per second (cfs). The antibiotic is degraded naturally in the lake with a first-order rate constant of 0.003 s^-1.

A. What kind of hydrodynamic model should you use for a small lake?

B. Write the mass balance equation in words.

C. Write the mass balance equation for the antibiotic in symbols at steady state. Define your symbols.

D. What is the antibiotic concentration in a river draining the lake at steady state?

 

Posted Date: 3/19/2013 4:03:42 AM | Location : United States

Ask an Expert

Related Discussions:- Write the mass balance equation, Assignment Help, Ask Question on Write the mass balance equation, Get Answer, Expert's Help, Write the mass balance equation Discussions

Write discussion on Write the mass balance equation
Your posts are moderated

Write your message here..

Related Questions

Application of revealed preference approach, Application of Revealed Prefer... Application of Revealed Preference Approach It has been strongly argued, especially by Sir John Hicks, that one major advantage of revealed preference theory is that it is expl

U.s. department of agriculture, The U.S. Department of Agriculture, nass.us... The U.S. Department of Agriculture, nass.usda.gov, publishes charts on the prices of farm products. Go to the USDA home page and select Charts and Maps and then Agricultural Prices

Solow model, Q1. The poorest countries in the world have a per capita incom... Q1. The poorest countries in the world have a per capita income of about $600 today. We can reasonably assume that it is nearly impossible to live on an income below half this leve

Benefits of private actions, Public policies often alter the costs and bene... Public policies often alter the costs and benefits of private actions. Why is it important for policymakers to consider both the direct and indirect effects of public policies? Sel

Revealed preference approach, REVEALED PREFERENCE APPROACH The downward... REVEALED PREFERENCE APPROACH The downward slope of the demand curve was justified on the basis of utility derived by the consumer. But specification of consumer tastes in form

Gross domestic product, GDP is an important indicator of a nation's economi... GDP is an important indicator of a nation's economic performance. It has many components which contribute to the growth of the economy. Oil is a minor component of GDP and therefor

Income Distribution, Researchers have put forth various theories to explain... Researchers have put forth various theories to explain the observed widening of the income distribution in the United States over the past four decades. First, there has been a sh

Define ndp, The following is the information from the national income accou... The following is the information from the national income accounts for a hypothetical country: GDP

Assumptions of the AS-AD model, Q. Assumptions of the AS-AD model? The ... Q. Assumptions of the AS-AD model? The most significant change we make going from IS-LM model to AS-AD model is to allow P to be endogenous. As P was constant in IS-LM model, w

Issctes related to balance of payments, ISSUES RELATED TO BALANCE OF PAYMEN... ISSUES RELATED TO BALANCE OF PAYMENTS: It  is to be remembered that the Indian economy witnessed varying intensities of BOP problem during 1956-9  1.  However over the 1990s,