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Sewer Plant

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User Generated
Subject
Environmental Engineering
School
Oregon State University
Type
Homework
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Primary Treatment for the Greater Drain,
OR Sewage Treatment Plant
Student name
Institution Affiliation
Course Code and Title
Professor’s Name
Date

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Objective: To estimate the proper design flow and loadings and size a primary
clarifier.
Introduction:
Now that Drain is entering the 21st century of environmental engineering, the community
has expressed an interest in getting off of septic tanks and connecting the community to a
sewer system. This will also address concerns by Oregon DEQ that the septic tanks in the
valley are leaching into Elk Creek and causing elevated BOD and nutrient levels.
Because the problem is distributed throughout the valley, it has been proposed that Drain
join with neighboring Elkton and Yoncalla, as well as the unincorporated areas in
between and for the Greater Drain Sanitation District. The combined population to be
served is approximately 7400, but to allow for the modest growth expected in the next 20
years (about 1% per year), the plant will be designed for a population of 9600.
The interim director of the Sanitation District, Ms. Anne Arobick, has requested
preliminary design data for the proposed POTW.
Task1: Calculation of square retention pond size
1. Connect the Science Workshop Interface to the computer.
Average daily flow = 1,000,000 (gpd)
Volume of pond = 4x
2
(ft
3
)
Hydraulic detention time = 3hours
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1 Primary Treatment for the Greater Drain, OR Sewage Treatment Plant Student name Institution Affiliation Course Code and Title Professor’s Name Date 2 Objective: To estimate the proper design flow and loadings and size a primary clarifier. Introduction: Now that Drain is entering the 21st century of environmental engineering, the community has expressed an interest in getting off of septic tanks and connecting the community to a sewer system. This will also address concerns by Oregon DEQ that the septic tanks in the valley are leaching into Elk Creek and causing elevated BOD and nutrient levels. Because the problem is distributed throughout the valley, it has been proposed that Drain join with neighboring Elkton and Yoncalla, as well as the unincorporated areas in between and for the Greater Drain Sanitation District. The combined population to be served is approximately 7400, but to allow for the modest growth expected in the next 20 years (about 1% per year), the plant will be designed for a population of 9600. The interim director of the Sanitation District, Ms. Anne Arobick, has requested preliminary design data for the proposed POTW. Task1: Calculation of square reten ...
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