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Question: From the information shown below, which two values would be used to calculate the waste activated sludge lbs/day?
Focuses on how environmental challenges and exposure is now a part of daily life, people must think about
Calculate the percent volatile solids reduction for the aerobic digester given the data below. Select the closest answer.
Buying paper towels would save fees for landfill waste, deforestation and therefore global warming. We could have a little more carbon dioxide to breathe in.
What is causing the low effluent pH? • Low alkalinity due to excess DO in the effluent
Which statement about aerobic sludge digestion is true? • Aerobic digestion produces a supernatant sidestream high in ammonia and BOD
In order to remove all the incoming nitrogen using biological nitrogen removal, to before it can be nitrified.
Question: What is a disadvantage of running an anaerobic digester in the thermophilic temperature range?
If an excess of nitrogen and carbon dioxide gas bubbles accumulate in the sand media of the denitrification filter, what will happen?
Dark brown, almost gray/black sudsy foam on the aeration tank surface. Mixed liquor color is very dark brown, to almost black.
Compare and contrast two alternatives for the county's solid waste disposal (One country uses robots, and another country uses bio-methane decomposition
Which of the following statements is true regarding biological scrubbers that use microorganisms to oxidize offending gases?
Odor complaints are increasing at the WWTP. The operator finds most odors seem to be coming from the primary clarifiers where bubbles and chunks of solids
If sludge feed rates are increased and MAINTAINED at the increased level, how would this affect methane production?
During the colder winter months, the flow to the facility increases due to seasonal tourism. The operator finds that maintaining effective coliform kills
Indicators include slow settling MLSS in the settleability test with straggler floc in a cloudy supernatant.
The operator of the biological phosphorus removal treatment plant is experiencing elevated amounts of phosphate (P) in the plant effluent.
Solids are washing out of the secondary clarifier of the activated sludge plant. Plant personnel increase the return activated sludge (RAS)
Light brown to brown colored pop-ups are rising in the secondary clarifiers of the conventional activated sludge plant. No odors are noticed as the sludge
Do you agree or disagree with the headline? Why or why not? What would be your response as a future industry representative if someone aimed this critique
Which observation best supports the argument that that human population of the Earth is still below its long-term carrying capacity?
The anaerobic digester supernate has a rancid-butter odor and the COz has increased to a point where no burnable gas is produced
Problem: A geologist is hiking in the interior of the continental United States in an area with lithified sand dunes.
Provides an estimate of how many planets there are in our galaxy that may harbor technically communicative life-forms.
What are the main sources of greenhouse gases in the atmosphere, and how do they differ between industrialized and developing countries?