Question 1 (Wastewater Treatment) 1.1 Water treatment often includes two disinfection steps; with the first disinfection step ensuring that water exiting the plant meets the standards for microbiological quality, while the second disinfection step ensures that there will be enough residual across the entire distribution network. Is there a similar requirement for wastewater treatment? Why or why not? And does the answer depend on the type of urban water cycle? Please keep your answer brief, a maximum of four sentences is recommended. [6] 1.2 Wastewater enters a 2.27x107 L/d treatment plant with a BOD of 200 mg/L and suspended solids of 180 mg/L. The primary clarifier removes 60% of the solids and 30% of the BOD. The activated sludge process (ASP), removes 95% of the BOD that it receives, produces an effluent with a suspended solids concentration of 20 mg/L, and yields 0.5 kg of solids per kilogram of BOD used. Find the quantities of raw primary sludge and waste activated sludge produced from this plant per day. [14]
Question 1 (Wastewater Treatment) 1.1 Water treatment often includes two disinfection steps; with the first disinfection step ensuring that water exiting the plant meets the standards for microbiological quality, while the second disinfection step ensures that there will be enough residual across the entire distribution network. Is there a similar requirement for wastewater treatment? Why or why not? And does the answer depend on the type of urban water cycle? Please keep your answer brief, a maximum of four sentences is recommended. [6] 1.2 Wastewater enters a 2.27x107 L/d treatment plant with a BOD of 200 mg/L and suspended solids of 180 mg/L. The primary clarifier removes 60% of the solids and 30% of the BOD. The activated sludge process (ASP), removes 95% of the BOD that it receives, produces an effluent with a suspended solids concentration of 20 mg/L, and yields 0.5 kg of solids per kilogram of BOD used. Find the quantities of raw primary sludge and waste activated sludge produced from this plant per day. [14]
Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Saeed Moaveni
Chapter3: Introduction To Engineering Design
Section: Chapter Questions
Problem 27P
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![Question 1 (Wastewater Treatment)
1.1 Water treatment often includes two disinfection steps; with the first disinfection step
ensuring that water exiting the plant meets the standards for microbiological quality,
while the second disinfection step ensures that there will be enough residual across the
entire distribution network. Is there a similar requirement for wastewater treatment?
Why or why not? And does the answer depend on the type of urban water cycle?
Please keep your answer brief, a maximum of four sentences is recommended. [6]
1.2 Wastewater enters a 2.27x107 L/d treatment plant with a BOD of 200 mg/L and
suspended solids of 180 mg/L. The primary clarifier removes 60% of the solids and 30%
of the BOD. The activated sludge process (ASP), removes 95% of the BOD that it
receives, produces an effluent with a suspended solids concentration of 20 mg/L, and
yields 0.5 kg of solids per kilogram of BOD used. Find the quantities of raw primary
sludge and waste activated sludge produced from this plant per day. [14]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4fc213ae-7abd-4964-b3e4-555a0868605d%2F9d13ecde-1b84-4cca-be6a-18c0c24a6c7f%2Fj9mns6m_processed.png&w=3840&q=75)
Transcribed Image Text:Question 1 (Wastewater Treatment)
1.1 Water treatment often includes two disinfection steps; with the first disinfection step
ensuring that water exiting the plant meets the standards for microbiological quality,
while the second disinfection step ensures that there will be enough residual across the
entire distribution network. Is there a similar requirement for wastewater treatment?
Why or why not? And does the answer depend on the type of urban water cycle?
Please keep your answer brief, a maximum of four sentences is recommended. [6]
1.2 Wastewater enters a 2.27x107 L/d treatment plant with a BOD of 200 mg/L and
suspended solids of 180 mg/L. The primary clarifier removes 60% of the solids and 30%
of the BOD. The activated sludge process (ASP), removes 95% of the BOD that it
receives, produces an effluent with a suspended solids concentration of 20 mg/L, and
yields 0.5 kg of solids per kilogram of BOD used. Find the quantities of raw primary
sludge and waste activated sludge produced from this plant per day. [14]
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