Wastewater Characteristics (Industrial (However, if the product…
Single family home wastewater
Retail stores (RTW, bags, shoes)
However, if the product manufactured is a hobby (such as pottery), not classified as industrial
Funeral homes (the embalming rooms)
Any wastewater generated from any process of industry, manufacture, trade, or business
Rules for Industry:
Must be submitted to the “On-Site Water Protection Section” for review and approval
System must be designed by a professional engineers
Each project evaluated on a case-by-case basis
Wastewater characteristics can vary from project to project
What is in wastewater
-Oil and Grease
Other Important Wastewater Characteristics
The acidity or alkalinity of wastewater
affects both treatment & the environment.
The pH of wastewater needs to remain between 6 & 9 to protect organisms
Acids & other substances that alter pH can inactivate treatment processes when they enter wastewater from industrial or commercial sources.
Potential of Hydrogen
– measures hydrogen concentration in water
7.0 is neutral on scale of 0 – 14
Can affect how chemicals dissolve in water
Whether a system serves a single home or an entire community, it must be able to handle fluctuations in the quantity and of wastewater it receives to ensure proper treatment is provided at all times
Extreme fluctuations in flow can
occur during different times of the day and on different days of the week.
Normally, estimates of flow are based on observations of the minimum & maximum amounts of water used on an hourly, daily, weekly, & seasonal basis
Therefore, estimating flow volumes for centralized treatment systems is a complicated task, especially when designing a new treatment plant in a community where one has never existed previously.
-biological treatment activity accelerates in warm condition, & slows in cool temperatures, but extreme hot or cold can stop treatment processes altogether.
-some systems are less effective during cold weather
-some may not be appropriate for very cold climates
eg: Hot water, as byproduct of many manufacturing processes, can be a pollutant. When discharged in large quantities, it can raise the temperature of receiving streams locally and disrupt the natural balance of aquatic life.
Determine types of organisms that can live in water
Affects how much oxygen water can hold
Warm water holds less oxygen
Thermal Pollution (increased water temperature)
decreasing oxygen supply
killing fish juveniles which are vulnerable to small increases in temperature
affecting ecosystem composition.