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32 Cards in this Set
- Front
- Back
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True or false the pure oxygen activated sludge system is a modification of the air activated sludge process |
True |
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True or false to operate the activated sludge process efficiently a properly settling mix liquor must be achieved and maintained |
True |
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True or false the ras makes it possible for the micro organisms to be in the treatment system shorter than the flowing waste water |
False |
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Operations by or calculations of the FM ratio should be based on daily test to reflect rapidly changing conditions |
Falls |
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True or false cyanide combines with acid ways to form the extremely toxic ass HCN |
True |
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True or false frequently industrial waste lack the proper nutrients for healthy micro organisms growth and reproduction in the activated sludge process |
True |
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The rate of nitrification will vary significantly with temperature in pH |
True |
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Acid is produced by notification |
True |
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What is an advantage of pure oxygen activated sludge systems over here activated sludge systems? 1.They illuminate the need for aeration 2. They illuminate the need to waste activated sludge 3.They require operators with less skill and knowledge 4.They use smaller aeration reactor tanks |
4.They use smaller aeration reactor tanks |
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What is the function of the activated sludge process? 1.To activate the disinfection process 2.To remove suitable and Flotable 3.To remove suspended and dissolved solids 4.To treat solid removed by other processes |
3.To remove suspended and dissolved solids |
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Under what conditions should be reactor vent gas purity valve be fined tuned? 1. When energy consumption increases or decreases dramatically 2.One plain effluent changes considerably 3.When the DO in the MLSS changes significantly 4.When there is a drastic change in either the quantity or strength of waste water entering the plant |
4.When there is a drastic change in either the quantity or strength of waste water entering the plant |
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What does the set ability method of calculating the ras flow rate assume? 1.The measurements made with a laboratory settling cylinder will accurately reflect the settling in to clarifier 2.That micro organisms reproduce in the laboratory in a fashion similar to reproduction in a clarifier 3. The operators can accurately calculate the RAS flow rate 4. That the RES pump rate can fluctuate with the suspended solid concentration |
1. That measurements made with a laboratory settling cylinder will accurately reflect the settling in a clarifier |
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What is the purpose of the respiration rate for activated sludge tests? To give some insight into the 1.Diversity of the micro organisms in the activated sludge 2. Health of the micro organisms in the activated sludge 3. Need to adjust the aeration system 4.Need to re-calibrate the DO sensor in the aeration basin |
2.Health of the micro organisms in the activated sludge |
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What can an operator expect of an activated sludge that has excessive filamentous organisms? 1.Clear settling 2.pin floc 3.Poor settling 4. Septic sludge |
3.Poor settling |
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What does the BOD test measure? |
The rate of oxygen uptake from the waste water by micro organisms in a bio chemical reaction |
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What are the major nutrients of concern in the activated sludge process? |
Nitrogen and phosphorus |
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How can more nitrogen be added to industrial waste water? More nitrogen can be added in the form of |
Ammonia |
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How can more phosphorus be added to industrial waste water? More phosphorus can be added in the form of |
Phosphoric acid |
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What is a Bioassay test |
A method of determining toxic effects of industrial waste using live test organisms such as fish |
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What happens when brewery waste water first comes in contact with activated sludge organisms? |
There is a sudden demand for oxygen by the activated sludge organisms |
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What items could be causes of filamentous bulking in the activated sludge process |
A lack of adequate nutrients in the influent. Large fluctuations in the plant influence organic loading. Low DO levels in aeration basins and secondary clarifiers. Low FM levels in the aeration system. The presence of high levels of sulfur in the influence |
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What types of toxins are often found in dairy plan affluent |
Detergents. Lubricants. Refrigerants. Sanitizers |
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What main compounds found in petroleum waste water can be treated very efficiently buddy activated sludge process |
Ammonia. Sulfide. Phenols |
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What is the major cause of PH fluctuation in dairy plant affluent |
Cleaning and sanitizing operations |
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What could be the cause of rising sludge in clarifiers |
Denitrification |
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Potentially explosive or flammable conditions can be present when pure oxygen is mixed with what |
Fuel oil. Gasoline. Lubricating oil |
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What basic approaches can we use to control the razz flow rate |
As a constant percentage of the influent flow Independently from the influent flow |
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The respiration rate for activated sludge test can be used to alert operators to require changes in which operating guidelines |
Aeration tank detention times. Quantity of oxygen needed. Return sludge flow rates. Waste sludge flow rates |
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What information can be gained by calculating the oxygen uptake rate (OUR)Value? You can obtain a fairly good estimate of |
Affluent quality. Food quality. Food strength |
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What micro organisms are important indicators in the activated sludge process |
Filamentous organisms. Protozoa. Rotifers |
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Automatic devices are commonly used to monitor what items |
Dissolved oxygen. Flow. Oxidation potential. PH |
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What conditions have been found to cause the disappearance of the higher forms of activated sludge bacteria (ciliates and rotifers) |
Do levels below 3 to 4MGL. Hi organic loading. Lack of PH control. Nutrient deficiencies. Toxic substances |
