Calculate the nod and thod of a waste

Assignment Help Civil Engineering
Reference no: EM131252017

Organic carbon (C) and ammonia nitrogen (NH3) are oxidized to carbon dioxide (CO2) and nitrate (NO3-) respectively, by bacteria that are naturally present in wastewater and in natural systems such as lakes and rivers. Both of these reactions consume oxygen and may cause a negative impact on water quality. The amount of oxygen theoretically required to consume a carbonaceous (ThOD) or nitrogenous (NOD) waste may be calculated according to the stoichiometry of the reactions as outlined in this chapter. The production of coke, a fuel produced from coal for use in steel mills, generates a waste gram rich in ammonia, phenol, and naphthalene. Calculate the NOD and ThOD of a waste containing 25 mg/L of ammonia-nitrogen (NH3-N), 50 ing/L of phenol (C6H5OH). and 150 mg/L of naphthalene (C10H8). What is the total theoretical oxygen demand of the waste?

Reference no: EM131252017

Questions Cloud

Doubtful accounts shows a balance of only : How can bad debt expense be reported as $32,000 while the allowance for doubtful accounts shows a balance of only $29,000? Should those two numbers not always be identical in every set offinancial statements?
Inadequate nurse staffing has been reported to lead nurses : Due to a shortage of registered nurses, in combination with increased workload, has the potential to impact quality of care. Nursing workload is increasingly thought to contribute to both nurses' quality of working life and quality/safety of care.
What is the nature of the given things : Metaphysics is a subfield of philosophy that asks such questions as, "What kinds Of things exist?" and "What is the nature of those things?"
Type of unemployment is the song about : In his song "Allentown," Billy Joel sings about the demise of the steel and coal industry in Pennsylvania. In areas like Allentown and much of the Midwest, manufacturing was once the largest employer, but many of those jobs have disappeared as tec..
Calculate the nod and thod of a waste : Calculate the NOD and ThOD of a waste containing 25 mg/L of ammonia-nitrogen (NH3-N), 50 ing/L of phenol (C6H5OH). and 150 mg/L of naphthalene (C10H8). What is the total theoretical oxygen demand of the waste?
Company continue reporting an estimated figure : The actual amount might well be $6,000 or $8,000 or many other numbers. When theprecise figure is known, does a company return to its Year One financial statements and adjust them tothis correct balance? Should a company continue reporting an esti..
Illustration expects to collect an amount : The company in this illustration expects to collect an amount from its receivables that will notmaterially differ from $93,000. The related $7,000 expense is recorded in the same period as therevenue through an adjusting entry.
How much coal per hour would be required : To what limiting value does the water evaporating per kg of coal consumed approach as the station output increases?
Trouble of setting up a separate allowance : This approach is simpler as well as easier to understand. Why was the $7,000 added to an allowance account? In reporting receivables, why go to the trouble of setting up a separate allowance?

Reviews

Write a Review

Civil Engineering Questions & Answers

  What real rate of return will the investor receive

You may pay $15,000 for an annuity that pays $2500 per year for the next 10 years . You want a real rate of return of 5% , and you estimated inflation will average 6% per year. Should you buy the annuity?

  How much will bar deform if it is released from the framwork

A 24-in.-long copper bar with a yield strength of 30,000 psi is heated to 120°C and immediately fastened securely to a rigid framework. The coefficient of thermal expansion for copper is 16.6x10-6 (1/oC).

  Balance the latitudes and departures by using the compass

A four-sided closed field traverse has the following angles. A = 81 degrees 22%u201930%u201D, B = 72 degrees 32%u201930%u201D, C = 89 degrees 39%u201930%u201D, D =116 degrees 23%u201930%u201D.

  Determine the internal moments at a and b

Determine the internal moments at A and B, then draw the moment diagram. Assume B and C are rollers. EI is constant. Show which FEM equations were used and how you determined them.

  Maximum acceleration from rest

The base engine develops 200 ft-lb of torque, and a modified version of the engine develops 240 ft-lb of torque. If the overall gear reduction ratio is 8 to 1, what is the maximum acceleration from rest (in ft/sec^2) for:

  Find the flow rate if the pump puts 22 hp in to the flow

At A, the pipe diameter is 24 in and the pressure is 45 psi. At B, the pipe diameter is 12 in and the pressure is 50 psi. Point B is 3 f t lower than A. Find the flow rate if the pump puts 22 hp (16 kW) in to the flow. Neglect head losses.

  What is length of consecutive wet days that has a occurence

Assuming that the number of days until the next dry day is geometrically distributed, what is the length of consecutive wet days that has a probability of occurence of no more than 0.05

  Determine the bod concentration leaving each pond

The volume of the first pond is 5.0 million gallons, and the second pond is 3.0 million gallons. Assuming complete mixing within each pond, find the BOD concentration leaving each pond

  Find how much would the pressure in the tank increase

A rigid tank contains 5kg of water at 20 degrees Celsius. A gage on the tank reads 200kPa. Determine a) the volume of the tank, b) How much would the pressure in the tank increase if the temperature were increased to 50 degrees Celsius.

  Find the equation of elastic curve by successive integration

A simply supported beam has a concentrated downward force P at a distance of a from the left support, as shown in the figure below. The flexural rigidity EI is constant. Find the equation of the Elastic Curve by successive integration

  What is the rate of water to be added to the tank

A hole at the bottom of a fish tank releases water at a rate given by the free jet equation. The hole at the bottom has a .5" diameter. If the water level is desired to be at 2' high and be at steady state, what is the rate of water to be added to th..

  What would be the estimated total annual dollar savings

what would be the estimated total annual dollar savings of a company with an annual direct labor payroll of 2,500,000 and a fixed overhead rate of 150 percent of direct labor , if the company initiated a methods and standards program

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd