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119 Cards in this Set
- Front
- Back
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If you have PWS number or a DEQ discharge permit, you are required to have a __________ |
Certified operator |
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Any sewerage system which serves multiple connections and consists of a collection and/ or pumping/transport system and treatment facility. |
Community sewerage system |
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Safe drinking water act, 42 was published? |
1 July 1999 |
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Part XIII is for? |
Sewage disposal |
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Within the sanitary code Who has responsibility for sanitary wastes? |
OPH office of public health |
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_________ has responsibility For non domestic (industrial) waste treatment and domestic waste |
DEQ department of environmental quality |
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_______ is used household water and waterborne solids that flow in sewers to the treatment plant. |
Sewage |
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_______ is used water and water carried solids, both domestic and industrial, that flow to a treatment plant. |
Wastewater |
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Total solid types. |
Dissolved solids Suspended solids Floatable solids |
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Is usually salts has organic 57% +/- Has inorganic 43% +/- |
Dissolved solids |
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What is a flammable. Explosive, colorless and odorless gas? |
Methane |
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Pure oxygen can be deadly true or false |
True |
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Types of pathogenic organisms |
Typhoid Chlorera Dysentery Polio Hepatitis A,B,C |
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What pH does DEQ permit |
6-9 pH |
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What is odorless Colorless Does not support combustion Deadly |
Carbon dioxide (Co²) |
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In wastewater what is at the top and at the bottom? |
Scum is at the top Sludge is on the bottom |
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These bacteria can ontain their oxygen from either dissolved oxygen in the water column of from the chemical breakdown of the organics. They are usually found in the middle of the water column The bacteria goes both ways |
Facultative bacteria |
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These bacteria use dissolved oxygen found in the water column for the metabolic processes They are usually found in the upper portions of the water column since that is where most aeration takes place. |
Aerobic bacteria |
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These bacteria obtain their oxygen from the chemical breakdown of the organics they ingest. They are usually found in the lower portions of the water column since most aerators do not provide air there |
Anaerobic bacteria |
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When bacteria takes nutrients thru a mouth Uses chemicals for internal breakdown |
Exocellular digestion |
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When bacteria takes nutrients thru. Cell wall Uses chemicals for internal breakdown |
Adsorption |
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When bacteria like a sponge takes nutrients from outside cell Uses chemicals or external breakdown |
Absorption |
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Ammonia to nitrate = |
Nitrification |
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Nitrate to nitrogen gas= |
Denitrification |
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NH³ is |
Ammonia |
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CL² |
Chlorine |
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OCL |
Hypochlorite |
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CLO² |
Chlorine dioxide |
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Sulphur dioxide |
SO² |
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O² |
Oxygen |
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H2S |
Hydrogen sulfide |
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SO4 |
Sulfate |
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Water |
H2O |
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CO |
Carbon monoxide |
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CO2 |
Carbon dioxide |
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What do you call the organics and water that are put into the system |
Loading |
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The louisiana state plumbing code requires cleanout not more than ______ ft apart for 3 in lines |
50ft |
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The louisiana state plumbing code requires cleanout not more than _____ ft apart for lines 4-6 inches in diameter |
80 ft |
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What is the scouring velocity of sewerage? |
2 fps |
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In a lift station what is the number one cause of a float not working |
Grease |
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A pH of less than ____ allows sulfates to release H²S |
6 |
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What is used to ensure that lines are fairly level and straight with no obstructions |
Lamping |
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When pressure testing to insure that you don't have any pin hole leaks you must maintain a psi of _____ for _____ minutes |
5 psi 10 minutes |
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How can you check pipes? |
Mandrel pipe defloration gauge Video cameras Smoke testing Dyes Sonic resonancing |
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A screw pump must |
Slope 38 degrees |
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The major cause of odors in the collection system is |
Sulfates being reduced to sulfites |
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When pressure testing lines you must maintain ____ psi for ____ minutes. |
5psi 10 min |
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When using dyes to locate manholes you must notify _______. |
DEQ |
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As the packing becomes worn there can be excessive leakage of sludge around the plunger. This can be compensated for by adjusting the _______. |
Packing gland bolts |
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A screw pump must slope _____°. |
38 degrees |
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Can peristaltic pumps be run dry? |
Yes |
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Common pump components |
Motor Shaft Couplings Bearings |
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Easiest problem to fix in pumping stations |
Belts |
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Each ring of packing should be rotated ____° |
90 degrees |
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Allow approximately ______ minutes between packing gland adjustments. |
15 min |
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How many drips must you have for mechanical pump seals? |
Zero |
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How many drips must you have for pump packing? |
20-60 drips per minute |
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What is a Common pump configuration in wastewater treatment? |
Parallel |
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What can cause cavitation |
Pump rate exceeds design conditions Suction line is undersized (Most common) Suction line is partially blocked |
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How can cavitation be reduced or eliminated |
Reducing the pumping rate Increasing the level in the wet well Increasing the size of the suction line |
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_______% of pump problems are on the suction side of the pump |
75% |
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You must renew LDEQ permit _______ before expiration date. |
180 days |
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A LDEQ permit is good for _____ |
5 years |
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A device used to slow or disturb normal flow of water |
Baffle |
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Heavier than water mineral material such as sand, coffee grounds, gravel and cinders |
Grit |
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Process of settling and depositing suspended matter carried by wastewater |
Sedimentation |
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A water pollution control facility |
Wastewater treatment plant |
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A wall or plate used to measure or control flow of water |
Weir |
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NPDES is |
National pollutant discharge elimination system |
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BOD stands for |
Biochemical oxygen demand |
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TSS stands for |
Total suspended solids |
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RBC stands for |
Rotating biological contactor |
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POTW stands for |
Publicly owned treatment works |
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COD stands for |
Chemical oxygen demand |
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SBR stands for |
Sequencing batch reactor |
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SDI stands for |
Sludge density index |
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MLSS stands for |
Mixed liquor suspended solids |
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MLVSS |
Mixed liquor volatile suspended solids |
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MCRT stands for |
Mean cell residence time |
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TOC stands for |
Total organic carbon |
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WWTP stands for |
Wastewater treatment plant |
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3 treatment processes |
Pretreatment Primary treatment Secondtry treatment |
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What is primary treatment |
The process of removing as much solids as possible |
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What is secondary treatment |
The processes done to finalize the treatment and to disinfect |
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What part of treatment is sedimentation and flotation |
Primary treatment |
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What treatment process is screening, Grit removal, pre aeration, flow meter |
Pretreatment |
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What treatment process is biological, solids handling, and disinfection |
Secondary treatment |
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What is done to control BOD in treatment |
Aeration |
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What process controls TSS in wastewater treatment |
Clarification |
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Steps in mechanical plants |
Head works Aeration Settling Sludge processing Effluent disinfection |
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5 steps of headworks |
Bar screen Barminutor/comminutor Grit chamber Parshall flume Splitter |
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Screens have spacing of about |
⅜ to 2" |
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Racks have spacing of about |
3 - 4" |
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Steps to a mechanical plant |
Head works Aeration Settling Sludge processing Effluent disinfection |
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Retention and detention time for clarifiers is usually designed to be ________ to ______ hrs. |
1.5-2 |
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In a clarifier the percentage of settling sludge is usually about ______ in 2 hours time |
60% |
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What uses bacterial slime (zoogleal film) to further eliminate organics in the water stream |
Trickling filter |
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Were is the slough returned to from a trickling filter |
Clarifier |
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Name the three basic parts of a trickling filter |
Distribution arm Filter media Under drain |
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Three parts of sludge handling |
Thickener Digester Drying process |
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What does a digester do |
Allows bacteria to digest organics present |
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The two most common groups found in digesters are |
Acid formers Gas formers |
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What psi is chlorine at the chlorinator |
20-30psi |
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How many minutes do you need for retention time in oder to properly disinfect |
30 min |
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Uv (ultraviolet) radiation is absorbed by |
Microbes |
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How many times faster than chlorine is ozone |
2000 |
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Ozone is ______ as strong as chlorine |
Twice |
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What color is ozone |
Blue |
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What chemical is used to dechlorinate |
Sulfur dioxide (SO²) |
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What color gas is sulfur dioxide |
Colorless |
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What color are the cylindersize containing sulfur dioxide |
Light blue |
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Name three types of clarifiers |
Circular Rectangular Boat |
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What uses a trickling of water down a media to stimulate bacterial growth |
Trickling filter |
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What allows removal of water from sludge |
Thickner |
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Two types of drying beds are |
Sand Tile |
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Name five basic activated sludge process components |
Influent pretreatment Aeration basin Secondary clarification Return activated sludge Waste activated sludge |
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All simple slope excavations 20 feet or less shall have a maximum allowable slope of ? |
1:1 |
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Types of reports |
Daily logs Maintenance Lab Dmr (discharge minotor report) Smoke testing/camera Lift station entry Calibration Osha Safety |
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A flowmeter must be calibrated every ? |
Year |
