Waste water Grade 1 Exam|3 Different Versions|Actual Questions and Answers|Latest Update|100% Correct
Waste water grade 1 exam
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Definition 20 to 50 lb BOD/d AC or higher. OL= in lb BOD/d / A Give this one a try later!Hydraulic loading Time based composite sample 1 / 4
Activate sludge treatment plant important aspects of operation
Organic loading of pond
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Definition
Stabilization of raw sludge solids is the key. VS, pathogen, and volume reduction and gas production are the process objectives.
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Coagulation Anaerobic digestion
Disinfection Sedimentation
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Definition
This test involves the chemical oxidation of all organics in a sample.Measure of organic strength of waste water, COD is always greater than BOD, In raw municipal sewage COD is typically 2 to 4 times 2 / 4
greater than BOD, takes 2 hrs to run COD compared to 5 days for BOD therefore more appropriate for process control.Give this one a try later!
ALGAE COD
BOD MCRT
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Definition
Anaerobic digester have 62-70% methane vol basis. Lel is 5% and uel is 15%.flammable/ explosive. Odorless, not toxic but can asphyxiate at high conc, lighter than air.
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Oxygen o2 Hydrogen h2
Methane ch4 Propane c3h8
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Definition
Multiple tube fermentation technique and the membrane filtration technique. Multiple tube fermentation Reported as mpn of bacteria per 100ml of effluent. Membrane filtration technique are reported as colonies per 100 ml of effluent.
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Procedures for evaluating heavy metal contamination in soil Methods for assessing chemical oxygen demand in water
Techniques for measuring dissolved oxygen levels in lakes Tests used to measure total and fecal Coliform conc.
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Term
Mass of vs in digester is reduced by how much
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More than 80 to 90% Exactly 100%
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