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23 Cards in this Set
- Front
- Back
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What are WRRF's? |
Water Resource Recovery Facilities |
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What are POTW's? |
Publicly Owned Treatment Works |
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Overloading a waterbody with wastewater can cause which 5 effects? |
1. Low Dissolved Oxygen (DO) in the water 2. Fish Kills 3. Algae Bloom 4. Spread of waterborne diseases 5. Violation of safe drinking water standards |
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What are the objectives of sufficiently treating wastewater? (2 Main goals) |
To protect the public health and environment. |
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What is a Pathogen and what do they include? |
An organism capable of causing disease, they include parasites, bacteria, and viruses. |
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What are the components of wastewater? |
Approximately 99.94% Liquid and 0.06% Solids |
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What year was the Clean Water Act instituted? What did it establish? |
1972 / Established a basic structure for regulating discharges of pollutants into U.S. waters. |
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What is Infiltration? |
Groundwater that enters the sewer system through cracks in pipes and manholes. |
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What is Inflow? |
Refers to groundwater, surface water, and rainwater that enters sewers through direct openings, such as drain cleanouts. |
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What is Exfiltration? |
Can happen when groundwater levels fall below the sewer- wastewater seeps out of pipes and into the ground. |
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What is Assimilative Capacity? |
The amount of pollution that can be absorbed or treated by the natural environment w/o damaging the environment or having negative consequences. |
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What does BOD represent? What is the purpose of performing this test? |
Biochemical Oxygen Demand This measures the amount of oxygen needed to sufficiently treat wastewater |
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What is Turbidity? |
This measures the cloudiness of water. (How much light is reflected in the water) |
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What does the term FOG mean? |
Fats, Oils, and Grease |
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What is a Unit Process? |
A way of talking about distinct treatment steps within a treatment facility. |
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Name some components of Physical treatment for wastewater? |
Mechanical Separation Gravity Flotation Filtration |
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What are Filaments? And what do they do? |
Filaments are a stringy bacteria that hold TSS (total suspended solids) together in the water, making them heavier until they settle in the bottom of the tank. |
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What is the ideal temperature for a BOD Test? How long should samples be stored? |
68° Fahrenheit/ 20° Celsius 5 days |
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What does CBOD mean? |
Carbonaceous Biochemical Oxygen Demand |
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What is the formula for converting Celsius temperatures into Fahrenheit? |
Fahrenheit degrees × 1.8 + 32 |
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What is the formula needed to convert Fahrenheit into Celsius? |
Fahrenheit degrees - 32 ÷ 1.8 |
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What does NOD mean? |
Nitrogenous Oxygen Demand |
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What is the formula for calculating the BOD total? |
BOD = CBOD + NOD |
