7.3 Waste disposal, reduction, and treatment

Question 1

how do lakes and rivers naturally clean themselves

Answer 1

plants other organisms and soil filter them and the bad stuff has places to settle

Question 2

water management systems

Answer 2

systems used in many countries that are put in place in order to manage water waste

Question 3

how are lakes and rivers self cleaning properties disrupted

Answer 3

ppl add csweage and storm water bad

Question 4

where does water go when u flush and stuff

Answer 4

down pipes to join other dirty water to go to a sewage treatment plant

Question 5

explain how sewage treatment plants clean water

Answer 5

primary sewage treatment: first they physically take out fat things like shit with progressively smaller web thingies

Question 6

grit

Answer 6

small loose particles

Question 7

why is the second stage of the sewage treatment needed (primary)

Answer 7

bc theres grit leftover from first

Question 8

how does the second stage of physical sewage treatment work

Answer 8

the grit falls to the bottom as a sludge and the rest of the water moves on to secondary treatment

Question 9

secondary sewage treatment aka

Answer 9

biological treatment

Question 10

sludge

Answer 10

thick soft mud

Question 11

secondary sewage treatment

Answer 11

the water from the primary is aerated so aerobic bacteria can break down further microbes and activated sludge is added to make more bacteria so sludge goes by and water moves to disinfection treatment

Question 12

activated sludge

Answer 12

bacteria loaded sludge

Question 13

why is secondary treatment aka biological

Answer 13

bc it uses organisms

Question 14

wbiosolids

Answer 14

sludge that is heated and dried and be used in agriculture or stored for more secondary steps in future

Question 15

addded sewage treatment step aka

Answer 15

disinfeciton

Question 16

disinfection stage

Answer 16

UV light prevents bacteria from being able to multiply and chlorine and ozone kills further bacteria

Question 17

tertiary sewage treatment

Answer 17

diff for all sewage treatment plants but is basically when another step is added like more biological treatments to clean the water more from nutrients like nigtogen and phosphorous

Question 18

are tertiary sewage treatments common and why

Answer 18

no expensive

Question 19

how many types of solid waste are there and what are they

Answer 19

2
industrial
municipal

Question 20

industrial solid waste

Answer 20

waste that comes from factories mines and more

Question 21

municipal solid waste

Answer 21

waste that comes from house or workplace

Question 22

where do municipal solid waste get stored usually

Answer 22

landfills

Question 23

types of landfills

Answer 23

open dump
sanitary dump
incinerator

Question 24

open dump pros

Answer 24

big for lots of waste
inexpensive
keep waste away from homed

Question 25

open dumb cons

Answer 25

smelly for ppl around (worse with wind that also spreads the waste itself) gasses from it emit to other places and wildlife around bad for them can belit on fire leachate need lots of land so lead to habitat destrucion

Question 26

leachate

Answer 26

water that goes through open dumbs that brings some of the particles with it

Question 27

why is leachate bad

Answer 27

can contaminate other water

Question 28

sanitary dump

Answer 28

dump where there is a liner and when trash is dumped in its covered by low quality soil into cells

Question 29

liner

Answer 29

layer of clay or plastic that keeps trash in

Question 30

sanitary dump pros

Answer 30

water hard to get in through cells less smelly and fire caused can make electricity if methane is used for it hard for stuff to spread to other places bc its sealed so weather and other stuff doesn't spread as easy

Question 31

sanitary dump cons

Answer 31

if there isn't a double liner the leachate will eventually build up in the bottom anaerobic decomposition which releases methane expensive

Question 32

double liner

Answer 32

when there is a regular liner and then another one to lead the leachate to sewage treatment systems

Question 33

cells in sanitary dumps aerobic or anaerobic

Answer 33

anaerobic

Question 34

why is anaerobic decomposition bad

Answer 34

bc it releases methane which is a greenhouse gas

Question 35

incinerator

Answer 35

places that burns trash

Question 36

incinerator pros

Answer 36

reduce volume of trash can produce electricity

Question 37

incinerator cons

Answer 37

CO2 emitted ash hazardous gasses emitted

Question 38

recycle vs reuse

Answer 38

recycle is when you use a substance to make it into smth different and useful reuse is when you js reuse the same exact thing

Question 39

state the four Rs of resources

Answer 39

refuse reduce reuse recycle