Question

A wastewater treatment plant designed for a community of 60,000 people has a flow of 100gal/person/day...

A wastewater treatment plant designed for a community of 60,000 people has a flow of 100gal/person/day and a biochemical oxygen demand (BOD) loading of 0.2 lb/person/day. The treatment plant has a permit limit for BOD equal to 15 mg/L.

a. (10 pts) What is the concentration (in mg/L) of BOD coming into the plant (i.e., as raw, untreated sewage)?

b. (2 pts) When the treatment plant is treating its waste and meeting its permit limit, what is the removal efficiency (in percent) of the plant?

**Please answer as soon as possible due in few hours**

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A wastewater treatment plant designed for a community of 60,000 people has a flow of 100...
A wastewater treatment plant designed for a community of 60,000 people has a flow of 100 gal/person/day and a biochemical oxygen demand (BOD) loading of 0.2 lb/person/day. The treatment plant has a permit limit for BOD equal to 15 mg/L. a. (6 pts) What is the concentration (in mg/L) of BOD coming into the plant (i.e., as raw, untreated sewage)? b. (2 pts) When the treatment plant is treating its waste and meeting its permit limit, what is the removal...
Problem #3: Biochemical Oxygen Demand (BOD) and Stream Quality A wastewater treatment plant designed for a...
Problem #3: Biochemical Oxygen Demand (BOD) and Stream Quality A wastewater treatment plant designed for a community of 45,000 people has a flow of 100 gal/person/day and a BOD5 loading of 0.2 lb/person/day. The upstream characteristics of the receiving waters are: stream flow rate = 20 cfs and BOD5 = 2 mg/L The water quality standards require the in-stream BOD5 to be less than 7 mg/L in this stretch of the river. The minimum BOD removal efficiency that the treatment...
You have been retained to design a wastewater treatment plant using a conventional activated sludge process...
You have been retained to design a wastewater treatment plant using a conventional activated sludge process for a town of 40,000 people. The industrial flow contribution to the sewer system is 300,000 gallons per day. Effluent discharge standards require effluent BOD5 and total suspended solids concentration of <10 mg/l. Assume the following design criteria are applicable: Domestic sewage flow = 100 gal/cap/day (including I/I) BOD loading = 0.18 lbs/cap/day TSS loading = 0.20 lbs/cap/day BOD removal in primary = 33%...
Wastewater treatment The Ampang Jaya Municipal Council with a population of 350,000 and several industries discharged...
Wastewater treatment The Ampang Jaya Municipal Council with a population of 350,000 and several industries discharged 11 MGD of raw sewage into an activated sludge system treatment plant. The average concentration of BOD5 is 240 mg/L and the suspended solids is 260 mg/L. If the average domestic per capita sewage flow is 225 L/c.day, what is the average flow of the industrial wastewater (in MGD)? marks) If the average BOD5 load from the domestic sewage is 55gcapita-1day-1, determine the average...
The volumetric flow to the ACME wastewater treatment plant is 25 MGD. The influent soluble BOD5...
The volumetric flow to the ACME wastewater treatment plant is 25 MGD. The influent soluble BOD5 is 200 mg/L and the effluent soluble BOD5 is 8 mg/L. The plant is designed to operate with a mean cell (biomass) residence time of 10 days. The yield coefficient is 0.6 mg biomass/mg substrate, and the biomass decay rate is 0.09/day. The reactor is to operate at a biomass concentration of 2500 mg/L. The thickened underflow biomass concentration from the secondary clarifier is...
A wastewater plant with the activated sludge process received 5 × 106 L/day of wastewater with...
A wastewater plant with the activated sludge process received 5 × 106 L/day of wastewater with a BOD5 of 500 mg/L. The primary clarifier removes 30% of the BOD and primary clarify effluent has no biomass (Xi=0 mg/L). Recycle (Qr) and waste sludge (Qw) flows are 25% and 2% of Qin, respectively. Effluent BOD5 from secondary clarifier and waste sludge is 20 mg/L. Microorganism concentration in the waste sludge (Xw) is 6,000 mg/L. Soluble BOD5 is biologically converted into CO2...
A 14 mgd wastewater treatment plant has a primary clarifier that treats an influent with 800...
A 14 mgd wastewater treatment plant has a primary clarifier that treats an influent with 800 mg/L of solids and a removal efficiency of 55%. Sludge at the bottom of the tank is pumped at a rate of 0.1 mgd. a. What is the effluent solids concentration from the clarifier (in mg/L)? b. What is the solids concentration in the sludge at the bottom of the tank (in mg/Land %)? c. The primary sludge is further processed in a digester...
A completely mixed activated-sludge process is being designed for a wastewater flow of (2.64 mgd) using...
A completely mixed activated-sludge process is being designed for a wastewater flow of (2.64 mgd) using the kinetics equations. The influent BOD of 120 mg/Lis essentially all soluble and the design effluent soluble BOD is 7 mg/L, which is based on a total effluent BOD of 20 mg/L. For sizing the aeration tank, the mean cell residence time is selected to be10 days and the MLVSS 2000 mg/L. The kinetic constants from a bench-scale treatability study are as follows: Y...
A wastewater treatment plant disposes of its effluent in a surface stream. Characteristics of the stream...
A wastewater treatment plant disposes of its effluent in a surface stream. Characteristics of the stream and effluent are given in the table below. What will be the dissolved oxygen concentration in the stream after 2.0 days? (10 Points) What will be the lowest dissolved oxygen concentration as a result of the waste discharge? (10 Points) Parameter Wastewater Stream Flow, m3/s 0.2 5.0 Dissolved Oxygen, mg/L 1.0 8.0 Temperature, o C 15.0 20.2 BOD5 at 20oC, mg/L 100 2.0 k1...
You are tasked with conducting BOD studies for a waste treatment facility and its discharge to...
You are tasked with conducting BOD studies for a waste treatment facility and its discharge to a nearby river. You are told that the facility removes 93% of the BOD in total with a discharge rate of 1.0 m3 /s. you sample the receiving water and find that it has a 0.5 mg/L deficit from saturation concentration (saturation is at 9.7 mg/L) and a BOD5 content of 10 mg/L. The river flows at a speed of 0.25 m/s and has...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT