Landfill Flashcards
Average American refuse per day
6 lbs
Average American plastic per year
60 lbs
Rubbish inorganic or organic
Inorganic
Garbage inorganic or organic
Organic
Refuse
Includes garbage and rubbish
LEA
Local Enforcement Agency
Active landfill inspection
Monthly
Trench method
Used in terrain, trench is dug then filled with solid waste and covered in soil
Area method
Most common, solid waste is placed on the side of the hill or slope
Valley of ravine method
Naturally developed large depression or slope
Landfill classifications
Class 1: hazardous materials (waste)
Class 2: low levels haz mat
Class 3: Municipal solid waste (no haz mat)
Leachate and methane gas generation
Produces leachate and methane gas
Landfill cover methods
Daily cover, Intermediate cover and Final cover
Dail cover
6 in of compacted soil at end of day, prevents fly larvae emergence, alternative daily cover
Final cover (foundation layer)
24 in of soil, approved alternate final cover design
Intermediate cover
12 in
Alternative daily cover (A.D.C.)
Tarps (geosynthetic over) Green material (not used often)
Purpose for land fill covers
Odor control, vector control, prevent waste from blowing off site, fire prevention and prevents scavenging
Soil type
Sandy loam (compatible mixture of soil and sand)
Landfill ideal slope
2:1 is 50%
Final closing slope
3:1 is 33%
Decomposition aerobic or anaerobic
Aerobic
Decomposition length
Aerobic: 4-60 days
Anaerobic: after 60 days
Gases produced in anaerobic decomposition
Methane (CH4), Carbon dioxide (CO2), Hydrogen sulfide (H2S)
Settlement monitoring
30 days
Settlement occurring
During first 5 years (90%)
Structure building over settlement
No, can collapse
Leachate
Liquid that passes through a landfill
Refuse collection frequency
Based on fly breeding, temp and humidity
Active compost temperatures
50 C or 122 F
Active compost temperature to kill fly larvae
Greater than 131 F
Composting methods
Windrows, aerated static piles, PFRP (Process to further reduce pathogens)
Windrows
Rows of compost piles, 131 F for 15 days and turn it 5 times
Aerated Static piles
131 F for 3 days
PFRP (process to further reduce pathogens)
Starts when piles reach 131 F
Good soil colors
Brown, red
Bad soil colors
Black, blue
Erosion control
Universal waste (e-waste)
