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besc 320 final exam with correct answers
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besc 320 final exam with correct answers
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besc 320 final exam with correctanswers
what is water polishing - Answer -any process that removes small material or very low
concentrations of dissolved material from water
The first step of wastewater treatment is usually - Answer -particle filtration
Fats and oils are removed from wastewater treatment mainly by - Answer -surface
skimmers above tank
Aerobic digesters are for - Answer -biofilm removes nutrients and biological content
(organic matter) OR bacteria removes settled debris
sewerage systems involve: - Answer -system of pipes with household connections to
large receptor and interceptor that carries waste matter either to a treatment plant to
directly to river or stream
-does not involve agriculture runoff
In combined sewerage systems; what generally happens during peak flows - Answer -
combined sewerage dump raw sewage into streams or rivers
secondary wastewater treatment includes - Answer -aerobiv biologcal processes to
reduce nutrient content
-trickling filters: settled sewage trickles through biofilm beds
-biotowers
-rotating biological wheels: biomass grows on rotating media and sewage passes
through its surface
-microbes that consume biodegradable organic compounds
-aerated basin systems
-activated sludge treatment
***all aerobic biological processs
Whiat is the typical economically useful byproducts of wastewater treatment? - Answer -
solid organic waste can be sold as fertilizer
-methane from digesters
How do natural wetlands filter water? - Answer -through biological filtration and use of
biofilm; organisms filter out nutrients
, -phytroremediation (detoxify wastewater and peat bags hold CO2 in vegetation in soil)
-slowing flow allows for settling
What percent of californias electoral consumption is used for water transport - Answer -
6.5% energy used
globally, what percent of lost DALYs is accounted for by water problems? - Answer -
88% of DALY
In what country is hydropower installation most common - Answer -US
In the US where is hydropower most common - Answer -mountain ranges; rivers;
washington oregon idaho (high rainfall)
How do dams generate power - Answer -reservoir water flows to intake tunnels down
tunnels into damn and turns water turbines which drives generator to spin magnets in
copper wires to produce electricity
how much global electricity is provided from hydropower - Answer -19%
Only ___% of the US energy is generated from hydropower; of this dams account for
____ of our total renewable energy - Answer -10% hydropower, 73% dams
The world's first mega dam was the - Answer -hoover dam
What number of people were displaced from the inundation zone of the three gorges
dam - Answer -1.3 million peopl
The colorado river flows from the rocky mountains and enters - Answer -gulf of california
in mexico
Why is it essential that international cooperation is achieved in water managment -
Answer -water wars: many countries like India/Kashmir where one country controls
upstreams water
what device launched the industrial revolution? - Answer -steam engine
What deice fed water into elevated aqueducts in pre-industrial times - Answer -noria
what innovations acceralted human population growth in the last few centuries - Answer
-mastery of water
-irrigation,dams
-seafaring: hydraulic states
-steam engine
-sanitary sewers/toilets
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