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http://www.eomf.on.ca/media/k2/attachments/Living_By_Water___Module_4___Septic_Systems.ppt
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Onsite Wastewater Treatment Systems
Mod
ule
4:1
What is a Septic System?M
odul
e 4:
2
Photo credit: MOEE
Septic tank
Soil absorption
Ground water
Filtration and Treatment
Leaching bed
Evapotranspiration
Streams, lakes
Well
Waste to WaterM
odul
e 4:
3
The Septic Tank
Inlet pipe Baffles Water & anaerobic bacteria Chambers Partition wall with holes Effluent filter Outlet pipe
Mod
ule
4:4
Inlet BafflesM
odul
e 4:
5
Flow Through the TankM
odul
e 4:
6
Partition wallM
odul
e 4:
7
Flow Through the Tank (cont’d)M
odul
e 4:
8
Effluent Filters
Zabel Effluent Filter
OSI Biotube Filter
Mod
ule
4:9
The Distribution System
Pump
Distribution box
Distribution pipes
Mod
ule
4:10
Distribution BoxM
odul
e 4:
11
The Leaching BedM
odul
e 4:
12
The Importance of SoilM
odul
e 4:
13
Septic System Capacity
Determined by:
House size Bedrooms Sinks, tubs, toilets Dishwashers, washing
machines, water-using appliances
Mod
ule
4:14
Location of a Septic SystemM
odul
e 4:
15
Causes of Failing Systems
Improper siting or installation
Undersized tank or leaching bed area
Mod
ule
4:16
Causes of Failing Systems
High groundwater table
Broken piping and compacted soils
Distribution box or header is off level
Faulty pumps
Mod
ule
4:17
Causes of Failing Systems
Poor maintenance:
Compacted soils and cracked pipes
Poisoning of bacteria by chemicals
Saturated leaching bed
Mod
ule
4:18
How Do You KnowIf You Have a Problem?
Mod
ule
4:19
Lush patches of grass Soft & spongy ground Pools of dark water
Toilets & drains gurgling or backing up Odours
The Dangers
Bacterial contamination of drinking water
1. Bacterial contamination of drinking water
Mod
ule
4:20
The Dangers
3. Costly repairs and replacement
2. Nutrient loading
Mod
ule
4:21
Proper Maintenance
1. Regular pump-outs
2. Regular inspections
3. Protect the leaching bed
4. Control your inputs
Mod
ule
4:22
1. Regular Pump-outs
Every 2-5 years (Depending on system size and load)
Mod
ule
4:23
2. Regular Inspections
Be present for pumping Check scum and sludge
depth Look for cracks Check seal on tank lids Listen for water Check interior of tank
DO NOT ENTER THE TANK AT ANY TIME
Mod
ule
4:24
3. Protect the Leaching Bed
Avoid compacting soils
Avoid damaging pipes
Avoid saturating leaching bed
Avoid planting trees near bed
Mod
ule
4:25
Conserve water
Reduce chemical use
Reduce solid waste
4. Control Your InputsM
odul
e 4:
26
Unfriendly Items
2-3 ply toilet tissue or facial tissue Hair, dental floss, medicines Kitchen scraps (eg. fats, oils or greases) Chemical cleaners (eg. toilet sanitizers) Paints or solvents (eg. nail polish remover) Antifreeze, gas, motor oil Cigarette butts
Mod
ule
4:27
Additives
1. Starters2. Feeders3. Cleaners
Look for an Environmental ChoiceProgram seal of approval or better yet…
Save your money!
Mod
ule
4:28
Take Action
Know your system Where it is and how it works Be alert to changes
Prevent problems before they start Regular pump-outs and inspections Protect your leaching bed Control what goes into your system
Research, learn & share information
Mod
ule
4:29
www.orwc.uoguelph.ca
www.oowa.org
Sources of InformationM
odul
e 4:
30
Alternative On-Site Technologies
In use in Ontario since the 1970s
Include secondary and tertiary treatment units as well as other technology
Mod
ule
4:31
Favourable Site Conditions For Alternative Technology
Cottages to full-time residences
Proximity to lakes and rivers
Shallow bedrock & high groundwater table
Clay soils
Sloped sites
Large concentration of houses on private
services
Mod
ule
4:32
Norweco Unit Discharging to a Shallow Buried Trench Bed
Mod
ule
4:33
Shallow Buried Trench Disposal Field
Mod
ule
4:34
Clearstream Unit Discharging to an Area Bed
Mod
ule
4:35
Waterloo Biofilter Installation: In-ground
Mod
ule
4:36
Waterloo Biofilter Installation- Above Ground
Mod
ule
4:37
Ecoflo Biofilter Treatment System
Mod
ule
4:38
Ecoflo Distribution SystemM
odul
e 4:
39
Various Ecoflo InstallationsM
odul
e 4:
40
Improving PerformanceAerobic Treatment Units
Mod
ule
4:41
The Wastewater Garden
Treats all household wastewater (black + grey) Treats wastewater using water-loving plants Water removed by evapotranspiration) Zero discharge = no release of nutrients or
pathogens
Mod
ule
4:42
Composting ToiletM
odul
e 4:
43
Photo courtesy of: BioLet Composting Toilets