A waste treatment lagoon having 3 cells, each 115,000 m2 in area, a minimum operating depth of 0.6 m, and a maximum operating depth of 1.5 m, receives 1,900 m3/d of wastewater having an average BOD5 of 122 mg/L. What is the BOD5 loading and detention time? The following data applies: the slope of the lagoon walls is disregarded in the calculations. a. 6.7 kg/ha-d, 54.5 days b. 20.2 kg/ha-d, 163.4 days c. 18.5 kg/ha-d, 177.6 days d. 18.5 kg/ha-d, 54.5 days e. None of these

Q: Design the in-line storage volume required to equalize the flowrate by using the following data.…

A: Time (hour) Flow (m3 /s) Volume (m3 ) 0000 0.0591 425.52 0200 0.0336 241.92 0400 0.0297…

Q: A sewage sample is tested for BOD5 at 20°C in laboratory and the data obtained are as follows:…

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Q: 4. If the ultimate BOD for wastewater has been estimated as (200+X) mg/l, calculate be the 5 days…

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Q: 3. Calculate the SDI for the following samples. Determine if the water needs to be pretreatment…

A: To calculate the SDI, we use the following formula:SDI = (1 - Ti / Tf) * 100 / Ttwhere:Ti is the…

Q: A wastewater treatment plant will receive a flow of 30,000 m3/day. The plant has a 3.6 m deep…

A: Given:- Flow rate, Q=30000 m3/dayDepth of circular primary clarifier, d=3.6 mSurface overflow…

Q: As a process engineer, you are designing sedimentation tanks for a new drinking water treatment…

A: Horizontal movement velocity of water is given by ; Vwater =2.0 mm /s Convert it into m /sec 1 m =…

Q: QUESTION: A city of 5000 persons is to be served by a low rate trickling filter with a synthetic…

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Q: Consider a stormwater retention pond that has no outflow. The pond is initially filled with pristine…

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Q: A domestic wastewater with BOD5 of 205 mg/L is treated by a secondary treatment plant that removes…

A: Given:- BOD5= 205 mg/L, the Secondary Treatment Plant removes 85% of BOD. Initial Do (Doi) =9.2…

Q: Q2: A wastewater containing 300 mg/l SS and 250 mg/l BOD passes through a primary sedimentation tank…

A: Here removal efficiency is not given, so we go with standard efficiency value. BOD removal in…

Q: Problem 1: If the BOD of a municipal wastewater at the end of seven days is 60 mg/L and the ultimate…

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Q: You are building a wastewater lagoon with an inlet/outlet flow rate of 3,100 m3/day. The BOD inlet…

A: Answer ) To determine the volume of the lagoon required, we can use the following formula:      V =…

Collection Systems

The collection systems form a part of sanitary engineering, which is a sub-branch of civil engineering. It is also known as public health engineering and wastewater engineering. It is a methodology followed to remove and properly dispose of human waste, along with creating systems to provide safe and clean usable water. These measures ensure a hygienic and disease-free community. Sanitary engineering, apart from building sewer disposal units, is also involved in plumbing, fire protection, hydraulics, life safety, environmental protection, information technology, microbiology, pathology, and so on.