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35 Cards in this Set
- Front
- Back
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How much education does an operator need? |
The amount of education needed depends on the type of treatment facility and also local certs and entry level job requirements. |
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What are primary treatment units used for? |
To removed sludge and scum |
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What are aerobic bacteria? |
Bacteria that live and reproduce only in environments containing oxygen. |
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What is pH |
pH measures the intensity of the basic or acidic condition of a liquid. |
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What is a storm sewer? |
Is a separate pipe, conduit or open channel that carries runoff from storms, surface drainage, and street wash, but does not include domestic or industrial waste |
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What is the purpose of primary treatment? |
To remove settable and floatable materials. |
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What is the most common wastewater flow device |
The Parshall flume |
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Why do organisms periodically be removed from the sludge activated process? |
To prevent the number of organisms from eventually becoming too great. |
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What is the purpose of pre-aeration? |
Is to freshen the wastewater and separate oils and grease. |
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What are the most common ways to dispose screen debris? |
Burial and incineration. |
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Why does grit settle out better in aerated grit chambers? |
Because the mixture of air and water has a lower specific gravity than water. |
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What is the purpose of a rectangular sedimentation basin scum trough? |
Is to receive the floating material from the scum skimmer for removal. |
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What are daily maintenance tasks for clarifiers? |
Greasing all moving equipment according to manufactures specifications and checking oil levels of motors. |
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How are light materials like hair oils and fats removed? |
By flotation to protect appearance of receiving waters. |
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What is the purpose of measuring inflow for a sedimentation digestion unit? |
Determine the hydraulic loading on a facility. |
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What is Zoogleal film? |
Is the name for the biological slime growth that develops on the trickling filter media. |
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What does high settable solids in the trickling filter effluent mean? |
The solids are being carried over the clarifier weir. |
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Which program is designed to prevent toxic waters from causing plants to violate their NPDES discharge requirements? |
The pretreatment facility inspection program. |
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What is the "media" used for biological contractors? |
Plastic discs. |
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What is supernatant |
Liquid removed from settled sludge. |
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What would cause black media on biological contractors? |
Solids or BOD overloading |
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What does activated sludge consists of? |
Sludge particles produced in raw or settled wastewater by the growth of organisms in aeration tanks in the presence of dissolved oxygen. |
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What are facultative bacteria? |
Bacteria that can use either dissolved oxygen of oxygen obtained from food materials like sulfate or nitrate ions |
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How can foaming be controlled? |
By water sprays. |
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What is the oxidation ditch process? |
Inorganic solids such as sand slit and cinders are captured in the oxidation ditch and removed during sludge wasting or cleaning operations. |
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What do flow equalization facilities do? |
Provide plans and specifications for package plants to handle high flows during wet weather of industrial discharges. |
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What happens to the heavy solids that settle to the bottom of a pond? |
They get composed by bacteria. |
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What is an aerobic pond? |
A pond having dissolved oxygen distributed throughout its contents practically all the time. |
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What does acid producing bacteria in a pond do? |
Convert organic matter to volatile acids, carbon dioxide, water, and nitrogen. |
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What happens when scum accumulates? |
Scum can cut off sunlight from the pond and odor problems can result. |
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When do you know the pH and DO has dropped in a pond? |
Dull green, gray, colorless water. |
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What can free over falls at a pond outlet cause? |
Releasing of odors, foaming, and gas entrapment, which may hamper pipe flow? |
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What is free chlorine? |
Chlorine in a liquid or gaseous form. |
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Why do chlorine manifolds have gas filters? |
To remove particles in the gas. |
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What is the maintenance of UV systems? |
Requires cleaning the quartz sleeves and changing lamps. |
