Question

A BOD test was run in a 300 mL bottle on a 30 mL dilution of...

  1. A BOD test was run in a 300 mL bottle on a 30 mL dilution of water with a 5 mL seed. The BOD5 of the seed was 150 mg/L. The initial dissolved oxygen level in the water was 7.9 mg/L, The day 5 level of dissolved oxygen in the bottle was 4.7 mg/L. What is the BOD5 of the water sample?

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 BOD3 test was run and the results were: Dilution = 30 Initial DO = 9.5...
A BOD3 test was run and the results were: Dilution = 30 Initial DO = 9.5 mg/L Final DO = 2.0 mg/L The reaction rate constant k has been found to be 0.25 day-1 . (a) What is the BOD3? (b) What would be the ultimate carbonaceous BOD? (c) What is the BOD5? (d) What would be the remaining oxygen demand after five days
A BOD test was conducted on the unchlorinated effluent of a municipal wastewater treatment plant at...
A BOD test was conducted on the unchlorinated effluent of a municipal wastewater treatment plant at 20°C. The wastewater portion added to a 300-mL BOD bottle was 30 mL, and the dissolved oxygen (DO) values listed below were measured using a dissolved-oxygen probe. No seed was added to the bottles. What is the BOD value for each “valid” sample? Valid samples are ones that do not violate the following two rules: 1. DOf is less than 1.0 mg/L (unclear if...
A BOD test is run using 80 mL of treated wastewater mixed with 160 mL of...
A BOD test is run using 80 mL of treated wastewater mixed with 160 mL of pure water. The initial DO of the mix is 8.0 mg/L. After 5 days, the DO is 4.0 mg/L. After a long period of time, the DO is 2.0 mg/L, and it no longer seems to be dropping. Assume nitrification has been inhibited so the only BOD being measured is carbonaceous. a. What is the five-day BOD of waste wastewater? b. Assuming no nitrification...
a. 200 mL of water sample was collected from a river. 5 mL of the river...
a. 200 mL of water sample was collected from a river. 5 mL of the river water diluted to 1 L. A BOD bottle which is 300 mL is filled with this water and aerated. The dissolved oxygen content was 7.8 mg/L initially. After 5 days, the dissolved oxygen content had dropped to 4.8 mg/L. What is BOD5 of this sample? b. Hydraulic conductivity of soil is measured as 2 x 10-2 cm/sec. After an accident, a truck carrying dissolved...
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...
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...
10 ml of waste water is diluted to 1 liter, aerated and sealed. The initial dissolved...
10 ml of waste water is diluted to 1 liter, aerated and sealed. The initial dissolved oxygen level of the sample was 50mg/l. The dissolved oxygen level after 5 days and 20 days were 40 mg/l and 28 mg/l. Estimate the rate constant associated with the biological decomposition of the waste.
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...
The City of Columbus recently issued an NPDES permit to a beer brewery discharging wastewater at...
The City of Columbus recently issued an NPDES permit to a beer brewery discharging wastewater at a flowrate of 0.15 m3/sec into Buckeye Creek (flowrate = 0.25 m3/sec), such that BOD5 of immediately after discharge must not exceed 2.5 mg/L. Upstream of the discharge, BOD5 in Buckeye Creek was measured at 1.5 mg/L. BOD decay rate constants were measured separately for the upstream creek (k = 2 d-1), the wastewater effluent (k = 0.2 d-1), and the downstream creek after...
300 mg of medication suspended in 150 mL is infused in 30 min. What is the...
300 mg of medication suspended in 150 mL is infused in 30 min. What is the dosage rate? 300 mg of medication suspended in 150 mL is infused in 30 min. What is the strength of the solution?