What is BOD? Write down its purpose in wastewater treatment. Is it possible to detect BOD by using biosensors? Justify your answer.
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Q: Working for the local wastewater treatment plant, you are asked by the labtechnician to help her set…
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A: given- waste water DO=2 mg/Ldischarge =1.10 m3/sriver DO==8.3 mg/Ldischarge =8.70 m3/s
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Q: wastewater
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Q: How will you reduce the turbidity value of a waste water sample by a reagent
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Q: microorganisms in wastewater
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Q: The following data was obtained to perform a BOD test to determine how well a wastewater treatment…
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A: The answer is below:
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What is BOD? Write down its purpose in wastewater treatment. Is it possible to detect BOD by using biosensors? Justify your answer.
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- Determine how much extra volume is needed to treat the following wastewater in a CSTR than in a plug flow reactor. • Influent TOC: 273 mg/L • Required Effluent TOC: 57.0 mg/L • Flow: 792,500 gallons/day • First Order Microbiological Rate Coefficient (k’): 5.98/day Answer: 295,000 gallons 2. Discuss in detail at least two ways the k’ value may have been obtained and which technique is probably more accurate?The following data have been obtained in a BOD test that is made to determine how well a wastewater treatment plant is operating. You need to process the data. What percentage of the BOD is being removed by this treatment plant? If this is a secondary treatment plant that is supposed to remove 85% of the BOD5, would you say it is operating properly?Working for the local wastewater treatment plant, you are asked by the labtechnician to help her set up BOD5 tests. The issue here is what dilution to use to get the BOD5 test to give an acceptable result. Of course, you do not know the actual BOD5 value, but you are able to determine from past tests that the total ultimate BOD (NBOD + L0) of the wastewater is546 mg/L and the organic Nitrogen (TKN) concentration of the wastewater is 32 mg N/L. You also know that the first order rate constant for the BOD test is 0.25 day-1. When you ask, the technician tells you that the normal DO concentration at the start of the test is 8.3 mg/L.Based on all this information, tell the lab technician which of the following wastewater sample volumes added to a standard BOD test bottle (300 mL) is going to produce an acceptable final result: 1 mL/3 mL/9 mL/30 mL/90 mL NOTE: Acceptable BOD test should comply with the two essential criteria: DOfinal ≥ 2 mg/L and DOinitial – DOfinal ≥ 2 mg/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?Hydraulic fracturing, or “fracking” is a controversial use of water that serves what purpose?The BOD is the measure of what type of pollutant in water? Describe how to do a OBD on water sample. A sample of water that you took from a lake that you visited on vacation gave a BOD measurement of 6 mg/L. Is the lake polluted? If so, what type of pollutant is present?
- As the consultant for designing STP, you proposed to use a completely-mix activated sludge system to treat sewage from a population of 45,000 PE. The sewage enters a primary clarifier with a BOD of 300 mg/L and SS of 360 mg/L. The primary clarifier removes 30% BOD and 60% SS. The aeration tank maintains a biomass concentration of about 3400 mg/L with a food to biomass ratio of 0.3 kg BOD5 per kg MLSS per day. The effluent BOD from the aeration tank is 16 mg/L. From a pilot plant study, the Y and kd values are 0.5 kg/kg and 0.06 per day respectively. Assume theunderflow concentration from the secondary clarifier of 9700 mg/L. Based on the above information, determine: i. The concentration of BOD and SS in the effluent of the primary clarifier ii. The volume of aeration iii. The mean cell residence time (MCRT). iv. The daily amount of biomass to be wasted.Environmental Engineering Five million gallons per day (MGD) of wastewater, with a concentration of 10.0 mg/L of a conservative pollutant, is released into a stream having an upstream flow of 10 MGD and a pollutant concentration of 3.0 mg/L. What is the concentration in ppm just downstream of the release point? How many pounds od substance per day pass a given spot downstream?Write down the objectives of the course of Waste water Engineering (CE1001)
- 1. Differentiate biological treatment from tertiary treatment of waste water. 2. Identify and elaborate the different methods of water treatment used for different chemical wastes in water.Q 01: How will you reduce the turbidity value of a waste water sample by a reagent? Elaborate the process with example. (Assume the data) Note: Write the answer in word format Subject: Environmental Engineering 2 LabA wastewater manager is concerned about the increasing number of intestinal illnesses in his town and the corresponding increased levels of a pathogen known to cause this illness found in wastewater samples. Which process should be used to track the source of this waterborne illness in his town? Epidemiology Civil engineering Hydrologic tracing Water management