Processes
These clarifiers located prior to secondary treatment are typically designed to provide 1.5 to 2 hours of detention time.
What are primary clarifiers?
This type of pump operates using air pressure.
What is a pneumatic pump?
These types of samples are a collection of a number of samples to represent a specific point over a specific time period.
What are composite samples?
All organics contain this element.
What is carbon?
Ensure these spaces are ventilated with portable air blowers to reduce atmospheric hazards.
What are manholes and other confined spaces?
Velocity of flow in a sewer system should not fall below this flow rate.
What is 2 feet per second?
This type of valve allows flow in only one direction.
What is a check valve?
Abbreviated NPDES, this regulatory document limits discharges into waterways and provides monitoring and reporting requirements.
What is National Pollutant Discharge Elimination System?
Hepatitis and polio are examples of waterborne diseases caused by this.
What are viruses?
The acronym SCBA stands for this and should be located near, but not in, chlorine storage areas.
What is a Self-Contained Breathing Apparatus?
These devices help prevent short circuiting in sedimentation tanks.
What are baffles?
This occurrence may be detected by a pinging sound coming from a pump.
What is cavitation?
This test is used to determine optimum dosage of chemicals.
What is a jar test?
The process is designed to kill pathogens in wastewater treatment.
What is disinfection?
This pressurized liquid can expand 460 times when it converts to a gas.
What is chlorine?
This type of pond has an anaerobic bottom layer and an aerobic top layer.
What is a facultative pond?
This condition leads to water leaking from a valve stem or packing.
What is dried out packing?
A pink or reddish color will appear when chlorine is present in a sample using this method.
What is DPD method?
This term refers to the pressure created by a vertical column of water.
What is head?
Use a solution of 10% ammonia to identify these types of leaks.
This flow measuring device is the most common used in wastewater treatment.
What is the Parshall flume?
This system is used to protect structures from corrosion, an alternative to repainting, using auxiliary anodes to attract corrosion.
What is cathodic protection?
This coagulant has the chemical formula Al2(SO4)3.
What is alum?
These systems require about 30 minutes of contact time for good disinfection.
What are chlorine contact chambers?
These are the most common injuries in wastewater operations.
What are strains and sprains?