- Study guides, Class notes & Summaries

What is the primary purpose of water treatment? The primary purpose of water treatment is to remove contaminants and impurities to make water safe for drinking, industrial use, and environmental discharge. What are the main steps in a conventional water treatment process? The main steps are coagulation, flocculation, sedimentation, filtration, and disinfection. What is coagulation in water treatment? Coagulation is the process of adding chemicals like alum or ferric chloride to water to des...

-

17 pages

Written in 2024/2025

Grade A+

ProfBarnnet

Exam (elaborations) . ATI PEDIATRICS PROCTORED EXAM 2024 ACTUAL NEWEST EXAM COMPLETE 300 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) / ALREADY GRADED A // BRAND NEW!! 2 Exam (elaborations) [NGN] ATI RN COMPREHENSIVE 2023!!! ATI COMPREHENSIVE PREDICTOR VERSION 1 COMPLETE (150) QUESTIONS AND ANSWERS LATEST | NEW!!! 3 Exam (elab

-

87 items

PremiumExamBank

Clinical Annual Competency Exam - Fresenius (Complete Answered 2022/2023 guide) 2 Exam (elaborations) Clinical Annual Competency Exam – Fresenius 2023 Update Q&A 3 Exam (elaborations) Clinical Annual Competency Exam – Fresenius 2023 Update Q&A a+ 4 Exam (elaborations) Fresenius ~ Water Treatment Study Guide actual Questions with Correct Answers

-

25 items

DrJon

What are the three treatment processes described in the book - Answer-Primary Secondary Advanced wastewater (Treatment Process) Primary wastewater process definition - Answer-is defined as physical or at times chemical treatment for the removal of settable and floatable materials Primary wastewater treatment processes - Answer-Screening Grit chamber Comminuting devices Flow measurement Sedimentation tank Screening - Answer-Removes large solids from the influent which w...

-

2 pages

Written in 2023/2024

Grade A+

lectknancy

Extra? - Answer-California Air Resources Board conducted a study to determine the long-term effects of air pollution on health. Their subjects were 5,000 school-age children from 12 southern California communities. Three results were clear. First, children who lived in areas with high amounts of air pollution exhibited slower rates of lung growth. Second, the children with asthma and other respiratory illnesses were affected more by the pollution than the other children. Third, school absences f...

-

8 pages

Written in 2023/2024

Grade A+

lectknancy

What is the normal color of wastewater containing dissolved oxygen? - Answer-Gray What type of effluent discharge requires a place to store the effluent? - Answer-Intermittent Vegetation around evaporation and percolation basins should not be allowed to exceed what maximum height, in inches? - Answer-10 inches What is the minimum distance in feet that a shallow well can be located from a sceptic tank? - Answer-100 feet Which test should be performed within 30 minutes of taking a samp...

-

2 pages

Written in 2023/2024

Grade A+

lectknancy

True/False. Odor Control in wastewater collection systems and at wastewater treatment plants is very important. - Answer-True True/False. Each person has a different tolerance level for various odors. - Answer-True True/False. Odors are always removed by chlorine. - Answer-False. Not always True/False. Sampling is the only time operators should not handle liquid oxygen. - Answer-False. Sampling is the only time operators need to handle liquid oxygen. True/False. In the sludge reaerat...

-

18 pages

Written in 2023/2024

Grade A+

lectknancy

ABSORPTION - Answer-The taking in or soaking up of one substance into the body of another by molecular or chemical action. ADSORPTION - Answer-The gathering of a gas, liquid, or dissolved substance on the surface or interface zone of another material. AEROBES - Answer-Bacteria that must have dissolved oxygen to survive. Aerobes are aerobic bacteria. AMBIENT - Answer-Temperature of the surroundings. ANAEROBES - Answer-Bacteria that do not need dissolved oxygen to survive. BENZENE -...

-

3 pages

Written in 2023/2024

Grade A+

lectknancy

activated sludge - Answer-Activated sludge is a mixture of sludge particles (floc), bacteria, fungi, protozoa, and rotifers maintained in suspension by aeration and mixing. aerobic (oxic) - Answer-Aerobic is a condition in which free and dissolved oxygen (DO) is available in an aqueous environment. anaerobic - Answer-Anaerobic is a condition in which free, dissolved, and combined oxygen is unavailable in an aqueous environment. anoxic [NO2, NO3, SO4] - Answer-Anoxic is a condition in...

-

15 pages

Written in 2023/2024

Grade A+

lectknancy

1 ½ times normal pressure up to 150 pounds, whichever is greater. - Answer-When pressure testing a new line how much pressure do you add? Incomplete form Not enough sample Silt or slime in bottle Positive e-coli - Answer-What would cause a repeat Bac T sample? lower area of water - Answer-What area is the Hypolimnion in water NSF standard. - Answer-Bleach has to meet what standard Lagoons - Answer-What is number one sludge removal process in Texas? RO and Nanofiltration - A...

-

6 pages

Written in 2023/2024

Grade A+

lectknancy

A water source with a pH value less than what number is an indication of possible CBR contamination? - Answer-6 In a driven well, the sections of well pipe are delivered in lengths of what size? - Answer-5 feet A temporary water source should not be converted into a permanent water source until after what activity has taken place? - Answer-An area search for a source requiring less development A well that is hand dug usually 3 feet in diameter or more is within what depth range? - Answe...

-

3 pages

Written in 2023/2024

Grade A+

lectknancy

When you are using copper sulfate to treat a lake, concentrations of organisms should never exceed how many parts per million to protect the lives of fish? - Answer-2 ppm A water source with a PH value less than what number is an indication of possible CBR contamination? - Answer-6.0 What are two classifications of water impurities? - Answer-Suspended or dissolved When jetting a well, you turn the jet or grill slowly for what purpose? - Answer-To ensure the hole is straight The pump ...

-

3 pages

Written in 2023/2024

Grade A+

lectknancy

Why should the operator be familiar with the wastewater collection and transportation network? - Answer-By knowing the origin of wastes reaching the plant, the time it takes, and how the wastes are transported, the operator will be able to spot troubles and take corrective action. What problems may occur when it takes a long time for wastewater to flow through he collection sewers to the treatment plant? - Answer-Hydrogen sulfide gas may be released by anaerobic bacteria feeding on the wastes...

-

2 pages

Written in 2023/2024

Grade A+

lectknancy

What is an atom with a charge called ? - Answer-Ion What is the most common solvent? - Answer-Water What is a substance that releases hydrogen ions (H+) when mixed with water ? - Answer-Acid Voltage and current that change direction and amplitude periodically is known as ? - Answer-Alternating current The electrical pressure available to cause a flow of current when a circuit is closed is ? - Answer-Voltage A protective device having a strip or wire of fusible metal that will brea...

-

4 pages

Written in 2023/2024

Grade A+

lectknancy

Air Strippers Granular Activated Carbon (GAC) - Answer-Best Available Technology (BAT) for treating VOCs (volatile organic compounds)? 24 Hours public notice 24 Hours to notify the state (primacy agency) Tier 1 violations are done by TV, radio, hand delivery - Answer-How long does a water utility have to notify the public on a Tier 1 Violation? Safe Drinking Water Act - Answer-Which regulation established MCL's? (maximum contaminant levels) Granular Activated Carbon (GAC) - Answer...

-

9 pages

Written in 2023/2024

Grade A+

lectknancy

Prepare to feed a greater quantity of chemicals - Answer-When operating an advanced treatment facility using chemical treatment for solids removal, you discover high flows entering the system, you should? When using Polymer in a gravity thickening process for sludge, when would more polymer dosages be required? when the: - Answer-Hydraulic loading rate increases When bacteria laden with phosphorus are faced with a parent death, they: - Answer-Release phosphorus from their cell structure in...

-

6 pages

Written in 2023/2024

Grade A+

lectknancy

True or False: In most cases, advanced wastewater treatment may not be required to meet criteria required to reuse water. - Answer-False (Practically all secondary treatments besides MBR cannot achieve treatment goals for reuse water. While MBR is considered secondary treatment, it provides the effluent quality of tertiary treatment) True or False: Using a membrane bioreactor (MBR) for treatment provides similar effluent quality as conventional activated sludge followed by effluent filtration...

-

3 pages

Written in 2023/2024

Grade A+

lectknancy

Advance Wastewater Treatment - Answer-also called tertiary wastewater treatment defined as additional treatment needed to remove suspended and dissolved substances remaining after conventional secondary treatment Priority Pollutants - Answer-toxic to humans and aquatic environment Volatile organic compounds - Answer-toxic to human; carcinogenic; form of smog Ammonia - Answer-increase chlorine demand can be converted to nitrates and can deplete oxygen with phosphorus, can lead t...

-

4 pages

Written in 2023/2024

Grade A+

lectknancy

What act required that local communities build and upgrade wastewater treatment plants? - Answer-The Clean Water Act of 1992 (united states) primary treatment - Answer-sedimentation and flotation secondary treatment - Answer-Biological treatment and secondary sedimentation advanced treatment - Answer-filtration and disinfection You will compare your results with the effluent limits set by... - Answer-The U.S. Environmental Protection Agency List the 3 processes for treating wastew...

-

2 pages

Written in 2023/2024

Grade A+

lectknancy

Name and define the stages of waste water treatment. - Answer-1. Preliminary treatment Screening Shredding Grit removal Oil/grease flotation removal 2. Primary treatment Removal of easily settleable solids/organic matter Removal of floating scum Sedimentation 3. Secondary treatment Removal of biodegradable, soluble organics and suspended solids Biological treatment (activated sludge process), trickling filters/bio towers, lagoons Sedimentation Disinfection 4. Tertiary treat...

-

6 pages

Written in 2023/2024

Grade A+

lectknancy