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CIV-439 Exam
Question | Answer |
---|---|
List the major environ'l issues that're impacting the world today. | o Natural resources depletion o Pollution of the air, water, & soil o Climate change/natural disasters (e.g., hurricanes, wildfires) o Solid wastes, landfill mgmt, & recycling o Overgrown cities/unsustainable infrastructure o Meat farming |
List the 5 major types of environ'l issues. | 1.) Energy 2.) Pollution 3.) Climate Change 4.) Habitat Destruction 5.) Resource Depletion |
How to address the 5 major environ'l issues | 1.) Invest in renewable energies 2.) Improve control of generation & treatment of pollutants 3.) Focus on carbon sequestration 4.) Use environmental impact assessments 5.) Replace utilized resources and extract them responsibly |
What do all regulatory systems under environ'l statutes have common? | o Planning and priority setting o Standard setting o Permitting o Monitoring and surveillance o Enforcement |
What is the treatment for suspended solids? | Settling and filtration |
What is the treatment for biodegradable organic contaminants? | Biological treatment |
What is the treatment for pathogens? | Disinfection |
What is the treatment for nutrients? | Precipitation, stripping, and denitrification |
What is the treatment for heavy metals? | Precipitation |
What is the treatment for refractory organics? | Activated carbon |
What is the treatment for dissolved solids? | Precipitation |
What is removed in wastewater pretreatment? | Materials that can cause operational problems |
What is removed in wastewater primary treatment? | About 60% of solids and 35% of BOD |
What is removed in wastewater secondary treatment? | About 85% of solids and BOD |
What is removed in wastewater advanced treatments? | Typically removes about 95% of BOD, solids, Nitrogen, and Phosphorus |