Which of the following statements is FALSE? a.The drain current contains the same amount of inert as the fresh feed when steady state is reached. Drainage current and recirculation current have different compositions. c.In recirculation, the proportion of inert in the feed to the reactor increases. d.Total turnover in a recycling process is always higher than turnover in a simple review. e.Recycling increases total sales

Which of the following statements is FALSE? a.The drain current contains the same amount of inert as the fresh feed when steady state is reached. Drainage current and recirculation current have different compositions. c.In recirculation, the proportion of inert in the feed to the reactor increases. d.Total turnover in a recycling process is always higher than turnover in a simple review. e.Recycling increases total sales

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter2: Municipal Solid Waste Characteristics And Quantities

Section: Chapter Questions

Problem 2.17P

See similar textbooks

Similar questions

An effluent stream sample (500 mL) from a metal-working facility contains 0.52 g nickel sulphate. (i) What is the nickel concentration of this effluent stream (in mg/L)? (ii) Would you regard this concentration as suitable for discharge to the local sewage system? (iii) How much total nickel (in kg) leaves the facility per year in this stream if ~1 ML of effluent is produced?
A municipal waste water has a BOD5 of 200 mg/L at 20 ˚C. The reaction rate constant k at 20 ˚C is 0.23 day-1.[5] a. calculate the ultimate CBOD.[5] b. calculate BOD5 at 15 ˚C.
how is solid and liquid waste similar in recycling
A lake with a volume of 10.0 x 10^6 m^3 that is fed by a stream with a flow rate of 5 m^3/sec and a pollutant concentration equal to 10mg/L. An industry dishcharges treated wastewater at a rate of 0.5 m^3/sec of the same pollutant into the lake at a concentration 100mg/L. The pollutant has a reaction rate constant of 0.20/day. Assuming pollutant is completely mixed in the lake and that ther is no evaporation and no other water losses or gains, determine the steady-state concentration of the pollutant in the lake.
You have been treating a wastewater with bacteria that have the following kinetic coefficients: k= 16 mg BODL/mg VSS-day Ks = 10 mg BODL /l b =0.2/day Y = 0.35 mg VSS/mg BODL fd = 0.8A genetic engineer comes to you and claims he can “fix” your bacteria so they are more efficient. The fixed bacteria will have b=0.05/day and fd = 0.95, while all other coefficients are the same. Using a chemostat reactor, you were successfully using a safety factor of 30, and you plant to continue doing so. How would the genetic engineers plan affect your sludge production and oxygen requirements? Assume X0=0, S0=200 mg BODL/l). In what ways are the new bacteria more efficient?
The discharge from a food processing plant is the only source of BOD in a river. The oxygensag curve shows a minimum DO concentration of 3.0 mg/L. The DO concentrationimmediately downstream of the discharge is at saturation (10.0 mg/L). Other characteristics ofthe system are as follows: u = 60 miles/day; kr = 0.80 days-1; kd = 0.20 days-1.a. Currently the food processing plant does not treat the waste. What percent removal ofthe BOD would be required to ensure that the DO of the river at any locationdownstream of the plant is always greater than 5.0 mg/L?b. How far downstream would the lowest DO levels occur?c. What ultimate BOD concentration of the mixture of the river and waste immediatelydownstream of the discharge would result in a minimum DO concentration of 5.0mg/L?
Can you please help me with this problem? Thank you An artisanal gold mine discharges 0.87 kg/day of mercury into a lake. The outlet stream discharge was measured at 1.6 m3/s with a steady state concentration of 5.2 ppb mercury. What is the percentage of the contaminant that is lost in the lake?
An air pollution control system At a plant consists of a cyclone precleaner followed by mi ESP. The air entering the cyclone has a PM concentration of 2,5 jg/m3. The concentration in the gases exiting the ESP is 0,02 g/m3, If it m known that the cyclone is 75% efficient, what is the collection efficiency of the ESP?
Water in a channel is flowing at a velocity, u=0.5 ms-1, and has a flow rate, Q = 2 m3s-1. The concentration of nitrate in the channel is 12 mg/L. What is the flux density of nitrate at the outlet of the channel?
A basin with dimensions of 12 width 100 length and 12 deep depth of water has an intention of 750 galons per minute. If the flow contains 250 mg/l of a waste with a degradation rate of mi what the efficant concentration from the basinis modeled as a continuously mixed flow reactor (CMFRCSTRIP tome 50 mg ime 20 m
Problem 2: Engineers sometimes use pipes as reactors in treatment plants. Suppose that the plant flow is 3.3ft3/s (about 2.1 million gallons per day, mgd) and a cylindrical pipe is to be used for disinfection.A. Draw a sketch of the system. Indicate the control volume by a dashed line. What kind of hydrodynamicmodel should you use for a pipe? What mixing conditions should you assume?B. Write the integrated mass balance equation for the pollutant in symbols at steady state. (“Integrated” meansthat your mass balance looks like: C = …) Define your symbols.C. For a pipe 3.5 feet in diameter and 50 feet long, what is the hydraulic residence time in minutes?D. For the pipe in Part C, what value of the first-order rate constant (in min–1) is needed to achieve a 99% removal of bacteria?
A waste stream flows at 2,000 liters/day with a concentration of 60 mg/l of hazardous chemicalA. The chemical undergoes a first-order decay reaction with k = 0.01/sec. Complete performanceanalyses of the three common ideal chemical reactors to determine the effluent concentration ofchemical A for the following conditions:1. CSTR, V = 500 liters2. PFR, V = 14 liters3. Batch Reactor, V = 500 liters (i.e., 4 batches of waste processed per day to handle thetotal daily volume of 2,000 liters) with a reaction time τ = 10 min.Compare and contrast the performance of each reactor type.