Process II Chapter 3

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What is chemical oxygen demand (COD)?

A measure of water pollution in which a sample is chemically oxidized (correct)

An analytical test that measures impurities due to carbon-based organic contamination

A measure of the quantity of hydrogen ions in a solution that can react and indicates whether a substance is an acid or a base

A measure of water pollution in which oxygen is consumed by bacteria digesting a sample

What is the most common method of treating wastewater?

An activated sludge process (correct)

A distillation system

A lagoon system

A chemical treatment system

What is an effluent?

The finished stream from a treating process, especially from a wastewater treatment process (correct)

The incoming stream to a treating process, especially to a wastewater treatment process

A chemical added to degrade organic from wastewater

The microorganisms added to degrade contaminants from wastewater

Which term refers to the measure of the quantity of hydrogen ions in a solution that can react and indicates whether a substance is an acid or a base?

pH (D) Signup and view all the answers

In wastewater treatment systems, which are the two important process variables?

Flow and level (D) Signup and view all the answers

What is a possible consequence of a pH imbalance in the process sewer?

It might kill the waste-consuming bacteria. (B) Signup and view all the answers

What two flammable gases can be created when organic material decomposes during wastewater treatment?

Hydrogen sulfide or methane (A) Signup and view all the answers

Which process technician duties are designed to ensure that the wastewater treatment plant produces a safe effluent stream that follows all regulations and permits?

Analyzing samples, regulating flows, and making adjustments based on those test results (A) Signup and view all the answers

What distinguishes a sanitary sewer from a storm sewer?

The water in a storm sewer is a result of precipitation, whereas the water in a sanitary sewer originates in restrooms, sinks, or drinking fountains that dispose of waste or used water. (B) Signup and view all the answers

What must a wastewater facility have in order to operate?

A water permit (B) Signup and view all the answers

What does the term turbid mean?

Cloudy (D) Signup and view all the answers

Why is the water in an aeration basin especially hazardous?

Because aerated water is not like water in a pool and poses a drowning hazard (B) Signup and view all the answers

A substance with a pH of 9 is ________.

a base (C) Signup and view all the answers

Why can spills to the process sewer cause safety, health, and environmental concerns?

They have the potential to kill the waste-consuming bacteria. (C) Signup and view all the answers

In water treatment, what is a lagoon?

An artificial pool for storage and treatment of polluted or excessively hot sewage, industrial waste, etc. (B) Signup and view all the answers

The general term for an underground collection system for liquid waste material, rainwater, etc. is a ________.

sewer (D) Signup and view all the answers

The removal of toxic materials at an industrial plant before the wastewater is released to the municipal sewer is known as ________.

pretreatment (B) Signup and view all the answers

If sand filters begin to plug up, what should the process technician do?

Reverse the flow to back flush the filter. (A) Signup and view all the answers

What is a total organic carbon (TOC) test?

An analytical test that measures impurities due to carbon-based organic contamination (C) Signup and view all the answers

What is the term often used to describe the microorganisms that degrade organic contaminants from wastewater?

Bugs (A) Signup and view all the answers

Influents are controlled by heat exchangers to stay below what temperature?

104 degrees Fahrenheit (A) Signup and view all the answers

What is another important process variable if biological treatment is involved in the wastewater treatment process?

Temperature (C) Signup and view all the answers

What term refers to the finished stream from a treating process, especially from a wastewater treating facility?

Effluent (A) Signup and view all the answers

The pH of alkaline substances (bases) is ________.

above 7 (A) Signup and view all the answers

What is storm water?

Water that is a result of precipitation (rain, melting snow, sleet, and ice) (D) Signup and view all the answers

Capital of France (example flashcard)

Paris