Podcast
Questions and Answers
How many PPB equals one PPM?
How many PPB equals one PPM?
- 1,000,000
- 100
- 10,000
- 1000 (correct)
If the bubbler system air supply line at the wet well is clogged, what will this cause the pump to do?
If the bubbler system air supply line at the wet well is clogged, what will this cause the pump to do?
Run longer than necessary, possibly not kick off and run continually.
If the bubbler system air supply line at the wet well has a hole in it above the water level, what will this cause the pump to do?
If the bubbler system air supply line at the wet well has a hole in it above the water level, what will this cause the pump to do?
Cause a low pressure reading showing a lower water level.
What is the best way to keep within the operating budget?
What is the best way to keep within the operating budget?
If a diaphragm pump has 2 check valves open, what will the pump do?
If a diaphragm pump has 2 check valves open, what will the pump do?
What does a suction lift pump typically read on the psi vacuum gauge?
What does a suction lift pump typically read on the psi vacuum gauge?
One mg per L equals how many pounds per 1 MG?
One mg per L equals how many pounds per 1 MG?
What is the proper way to put packing in a pump?
What is the proper way to put packing in a pump?
How many drips of water should you have coming out of a packing seal?
How many drips of water should you have coming out of a packing seal?
What is the efficiency range of most motors?
What is the efficiency range of most motors?
A motor that has a 440 volt supply is usually what phase of power?
A motor that has a 440 volt supply is usually what phase of power?
What does NPDES stand for?
What does NPDES stand for?
What is the regulatory agency document that controls pollutant discharges?
What is the regulatory agency document that controls pollutant discharges?
What is the best way to promote safety in the workplace?
What is the best way to promote safety in the workplace?
What is normally used to raise the pH in sludge?
What is normally used to raise the pH in sludge?
What is the common device used to measure the effluent of a lagoon?
What is the common device used to measure the effluent of a lagoon?
What concentration of H2S is unsafe to humans?
What concentration of H2S is unsafe to humans?
What is the minimum O2 concentration that is safe for workers to enter a manhole?
What is the minimum O2 concentration that is safe for workers to enter a manhole?
Normal air contains ______% of O2
Normal air contains ______% of O2
What knob is turned to control the usage of chlorine applied?
What knob is turned to control the usage of chlorine applied?
Can you store BOD at 4°C for 48 hours?
Can you store BOD at 4°C for 48 hours?
What is the minimum velocity of the water flow for a grit chamber?
What is the minimum velocity of the water flow for a grit chamber?
How many mg/L equals one grain per gallon?
How many mg/L equals one grain per gallon?
Dissolved oxygen increases when the temperature __________.
Dissolved oxygen increases when the temperature __________.
You can tell if a clarifier scraper arm is working by what means?
You can tell if a clarifier scraper arm is working by what means?
If the sludge is thick or thin, what does this tell you about the sludge scraper?
If the sludge is thick or thin, what does this tell you about the sludge scraper?
What is the term for aging and maturing of a body of water?
What is the term for aging and maturing of a body of water?
If the effluent from a treatment facility contained 5mg/L of BOD, what effect would this have on the receiving stream?
If the effluent from a treatment facility contained 5mg/L of BOD, what effect would this have on the receiving stream?
If you are doing a test and add one drop of chemical at a time, what is this method called?
If you are doing a test and add one drop of chemical at a time, what is this method called?
If doing a Winkler or azide method, and the contents of the bottle turn white after adding the first two chemicals, what does this mean?
If doing a Winkler or azide method, and the contents of the bottle turn white after adding the first two chemicals, what does this mean?
How far from a well should a sewer main be?
How far from a well should a sewer main be?
What is a connection between a potable water system and a nonpotable water supply called?
What is a connection between a potable water system and a nonpotable water supply called?
What type of bacteria causes diseases?
What type of bacteria causes diseases?
What diseases are considered to be waterborne?
What diseases are considered to be waterborne?
What are the 3 main components in fertilizer that are in sludge?
What are the 3 main components in fertilizer that are in sludge?
What is the application of the various soil and plant sciences to soil management and crop production called?
What is the application of the various soil and plant sciences to soil management and crop production called?
If the filter fecal test is run, what color would the fecal coliform show up as?
If the filter fecal test is run, what color would the fecal coliform show up as?
What is another name for non-filterable solids?
What is another name for non-filterable solids?
If you switch any lead on a three-phase motor, what is the result on the motor rotation?
If you switch any lead on a three-phase motor, what is the result on the motor rotation?
What type of plant involves steps: MLSS in aeration, MLSS no aeration, MLSS in aeration?
What type of plant involves steps: MLSS in aeration, MLSS no aeration, MLSS in aeration?
What part of a centrifugal pump is used to discharge water?
What part of a centrifugal pump is used to discharge water?
What is the major cause of bearing failure in a motor?
What is the major cause of bearing failure in a motor?
One horsepower equals how many watts?
One horsepower equals how many watts?
A piston pump is a ___________ displacement pump.
A piston pump is a ___________ displacement pump.
Never operate it against a ________ discharge pump.
Never operate it against a ________ discharge pump.
The suction valve should be ____ when the pump is started.
The suction valve should be ____ when the pump is started.
What is the BOD removal efficiency of a lagoon?
What is the BOD removal efficiency of a lagoon?
Why should you decant a digester?
Why should you decant a digester?
Which of the following is not a form of the hydrologic cycle?
Which of the following is not a form of the hydrologic cycle?
When should you lubricate motors?
When should you lubricate motors?
What is the addition of oxygen, removal of hydrogen, or the removal of electrons from an element or compound called?
What is the addition of oxygen, removal of hydrogen, or the removal of electrons from an element or compound called?
In wastewater treatment, organic matter is ___________ to more ______ substances.
In wastewater treatment, organic matter is ___________ to more ______ substances.
What are bacteria that can either use dissolved molecular oxygen or oxygen obtained from food materials called?
What are bacteria that can either use dissolved molecular oxygen or oxygen obtained from food materials called?
What is neutral pH?
What is neutral pH?
What is the major problem with using UV disinfection?
What is the major problem with using UV disinfection?
What is not able to be removed by a treatment plant?
What is not able to be removed by a treatment plant?
A sudden change in _________ of 10-20 mg/L may indicate a problem developing in a pond.
A sudden change in _________ of 10-20 mg/L may indicate a problem developing in a pond.
Waste material which comes mainly from animal or plant sources is called?
Waste material which comes mainly from animal or plant sources is called?
Hydrogen sulfide gas is noticeable by what characteristics?
Hydrogen sulfide gas is noticeable by what characteristics?
What is the minimum dissolved oxygen (DO) for fish to survive?
What is the minimum dissolved oxygen (DO) for fish to survive?
What book do you use to do lab tests?
What book do you use to do lab tests?
What is the purpose of riprap?
What is the purpose of riprap?
What is a plate put between two flanges with a hole in the middle used to measure the rate of air flow through the pipes called?
What is a plate put between two flanges with a hole in the middle used to measure the rate of air flow through the pipes called?
What is another name for total suspended solids?
What is another name for total suspended solids?
How do you check for a chlorine leak?
How do you check for a chlorine leak?
How much heavier is chlorine compared to air?
How much heavier is chlorine compared to air?
What is the temperature of an incubator for running BOD tests?
What is the temperature of an incubator for running BOD tests?
How often do you need to renew your license?
How often do you need to renew your license?
Wastewater is what percentage of water?
Wastewater is what percentage of water?
What is an Imhoff cone used for?
What is an Imhoff cone used for?
What is the mandatory years for keeping records for NPDES?
What is the mandatory years for keeping records for NPDES?
What regulates the rules of hauling sludge?
What regulates the rules of hauling sludge?
How long does a primary clarifier require for detention time?
How long does a primary clarifier require for detention time?
What is the diameter of a manhole?
What is the diameter of a manhole?
What is the recommended flow rate in feet per second on grit chambers?
What is the recommended flow rate in feet per second on grit chambers?
Two conditions required to be septic include?
Two conditions required to be septic include?
How deep should lagoons be to allow sunlight to penetrate and produce algae?
How deep should lagoons be to allow sunlight to penetrate and produce algae?
What is the required freeboard at the highest point of water?
What is the required freeboard at the highest point of water?
Fire hydrant needs to be ___ or possibly ___ ft away from a lagoon?
Fire hydrant needs to be ___ or possibly ___ ft away from a lagoon?
What must be posted on all four sides of a lagoon?
What must be posted on all four sides of a lagoon?
What is the best chemical used to kill duckweed?
What is the best chemical used to kill duckweed?
What is the recommended size of rock for riprap?
What is the recommended size of rock for riprap?
Study Notes
Wastewater Treatment Key Concepts
- PPM and PPB Conversion: 1 PPM equals 1000 PPB.
- Bubbler System Issues: Clogged air supply lines can cause pressure buildup, leading to pump malfunction; holes can cause false low pressure readings.
- Budget Management: Maintain a record of purchases and regularly compare expenses against the budget to avoid overspending.
Pump Operation and Maintenance
- Diaphragm Pump Valves: Both check valves should not be open simultaneously to ensure proper functioning.
- Suction Lift Pump Readings: An increase in mercury readings can indicate suction line restrictions.
- Packing in Pumps: Packing rope should be cut at a 45-degree angle and staggered around the shaft.
Safety and Health Standards
- Chlorine Exposure: 0.2% H2S concentration can be fatal; safe O2 levels above 19.5% are required for manhole entry.
- Waterborne Diseases: Diseases like Giardia, Typhoid, and Hepatitis are transmitted via contaminated water.
Chemical and Biological Measurements
- BOD Calculations: Removal efficiency in lagoons is typically 60-70%.
- Fecal Coliform Reporting: Measured in MPN (Most Probable Number) or Colony Forming Units (CFU) per 100 mL.
- pH Levels: Neutral pH is 7; below 7 indicates acidic conditions.
Physical and Operational Standards
- Sewer Distances: Maintain at least 300 feet from wells and 50 feet from water mains.
- Grit Chamber Flow Rates: Recommended flow is 1.0 to 2.0 feet per second.
- Record Keeping: NPDES records must be retained for a minimum of 5 years.
Equipment and Efficiency
- Amperage and Horsepower: A one horsepower motor runs on 746 watts; efficiency typically ranges from 80-95%.
- Sludge Handling: Thickened sludge enhances economic feasibility for disposal.
Environmental and Conservation Efforts
- Eutrophication: Refers to the aging and maturation process in water bodies, often leading to nutrient over-enrichment.
- Riprap Usage: Prevents erosion and maintains levees.
Emergency and Operational Protocols
- Chlorine Leak Detection: Use ammonia to check for leaks; a white gas indicates a leak present.
- Signs and Accessories: Safety signs must be posted around lagoons.
Algae and Organic Management
- Algae Control: Chlorination and copper sulfate are effective chemicals for managing algae proliferation.
- Organic Composition of Wastewater: Primarily consists of organic materials from animal and plant sources.
Miscellaneous Standards
- Laboratory Testing: Standard methods are the go-to for executing lab tests.
- Breathing Apparatus Storage: Store in an unlocked, approved casing outside chlorination areas.
General Knowledge
- Hydrogen Sulfide Characteristics: Notable for its rotten odor; can impair smell senses at low concentrations.
- Alkalinity Shifts: Sudden changes in alkalinity levels can signal potential issues in water bodies.
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