Sewer System Flashcards
What is the first step of the waste water treatment?
The preliminary treatment
What is the preliminary treatment?
Waste water passes through a bar screen which removes objects such as sticks, rocks and garbage. The waste water is slowed down as it enters the grit tank to allow sand, gravel and other heavy materials to settle to the bottom. Debris from the bar screen and grit tank is tricked into a landfill.
What is the second step of the wastewater treatment?
The primary treatment?
What is the Primary treatment?
The waste water flows into a primary settling tank where it is held for several hours. Solid particles settle to the bottom of the tank.
What is the third step of the waste water treatment?
The secondary treatment.
What is the secondary treatment?
A biological treatment process removes organic matter from wastewater.
What is the Fourth step of the wastewater treatment?
The Final Treatment
What is the final treatment?
The wastewater is disinfected with chlorine to kill harmful organisms. The clean water is then released to Lake Ontario.
What is the fifth step to the wastewater treatment?
Solids processing.
What is solids processing?
The primary solids from the primary settling tank and the secondary solids from the clarifier are sent to the digester. Micro organisms use organic material in the solids as food and convert it to methane gas. This gas can be used to produce electricity or to heat the plant.
What is the difference between a sewage system and a septic system?
Septic: Includes septic tank a drainage bed.
Sewage: A series of underground pipes.
