greywater-treatment.ppt

8/9/2019 greywater-treatment.ppt

1/22

GREYWATERGREYWATER

TREATMENT OPTIONSTREATMENT OPTIONS


2/22

Reed Beds ~ DefnitionReed Beds ~ Defnition

A sealed gravel flled tench inA sealed gravel flled tench in

which aquatic plants are grown.which aquatic plants are grown.Wastewater is allowed to slowlyWastewater is allowed to slowly

travel through the bed duringtravel through the bed during

which time wastewater quality iswhich time wastewater quality isimproved rom the resultingimproved rom the resulting

aerationaeration


3/22

29/01/15 3


4/22

RequirementsRequirements

ote that wastewater must be primaryote that wastewater must be primary

treated beore entering the reed bed.treated beore entering the reed bed.

!reywater "ows are based on #$$ %!reywater "ows are based on #$$ %&person&day&person&day

Bed setbac's are based on theBed setbac's are based on the

construction methodconstruction method

Dispensation rom the (ewerage Act isDispensation rom the (ewerage Act is

required in areas administered by (Arequired in areas administered by (A

WaterWater


5/22

Reed Bed designReed Bed design


6/22

)nlet &outlet (tructures)nlet &outlet (tructures


7/22

Wastewater flows under

the surface of the gravel

and is retained for atleast da!s

So"e water is eva#orated

Roots of the reeds #rovide

o$!gen for "icro%ialactivities

Pollutants areconsu"ed %!

"icroorganis"s

growing on the

gravel&

Pathogen reduction

%! natural die off

and anti%acterial

action of the roots

in so"e s#ecies

N and P are utilised

%! #lants to grow or

stored in the

sedi"ent of the %ed


8/22

(i*ing + Based on ,(-A(i*ing + Based on ,(-A

/odel0/odel01he minimum si*e or grey water systems1he minimum si*e or grey water systems

or 2 persons should incorporate3or 2 persons should incorporate3 Minimum of 5 days detentionMinimum of 5 days detention

Surface area of at least 18 mSurface area of at least 18 m22

Gravel substrate (20 mm)Gravel substrate (20 mm)

Water depth of not less than 500 mmWater depth of not less than 500 mmand 100 mm coverand 100 mm cover

ave a level base or not !reater thanave a level base or not !reater than

1 "1 "


9/22

Disposal AreaDisposal Area

ressuri*ed "ow to ensure evenressuri*ed "ow to ensure even

distribution via pump sump anddistribution via pump sump and

pumppump (ub surace irrigation(ub surace irrigation

(oa'age(oa'age

(urace irrigation ater disinection(urace irrigation ater disinection


10/22

4or (ub (urace )rrigation4or (ub (urace )rrigation

Area requirements are as perArea requirements are as per

engineers instructions or based onengineers instructions or based on5.6 %&m5.6 %&m 77&day and #$$ %&person&day and #$$ %&person

/odifed topsoil down to appro8 #6$/odifed topsoil down to appro8 #6$

mmmm lanted with salt and nutrientlanted with salt and nutrient

tolerant trees and shrubstolerant trees and shrubs


11/22

9omments9omments

Area requirementsArea requirements

Reeds may ta'e 7 years to matureReeds may ta'e 7 years to mature

/aintenance + harvesting 0/aintenance + harvesting 0

9are or holiday periods9are or holiday periods

(ensitive to input o chemicals etc(ensitive to input o chemicals etc Reuse o greywater componentReuse o greywater component

Aesthetically pleasingAesthetically pleasing


12/22

!reywater Diversion!reywater DiversionDevicesDevices

!reywater (aver!reywater (aver


13/22

29/01/15 13


14/22

29/01/15 14

Wastewater

'iverter

(alve

)ail Safe

Overflow

To

Irrigation


15/22

29/01/15 15


16/22

29/01/15 16


17/22

29/01/15 17


18/22


19/22

29/01/15 19


20/22

29/01/15 20


21/22

29/01/15 21

Approval Conditions

Interim approval for 24 monthsInterim approval for 24 months

Manufacturer is to collate reports fromManufacturer is to collate reports from

councils and owners with regard to anycouncils and owners with regard to anyissues with system performanceissues with system performance

Occupational Health and Safety issues withOccupational Health and Safety issues with

regard to homeowner maintenance- glovesregard to homeowner maintenance- gloves

worn and disposal of lint etcworn and disposal of lint etc All Sales in SA must e accompanied y aAll Sales in SA must e accompanied y a

notice to users outlining re!uirements"notice to users outlining re!uirements"


22/22

29/01/15 22

Otain SA #ater permission in their areasOtain SA #ater permission in their areas

Applications to the relevant authority must e madeApplications to the relevant authority must e made Installation carried out y a licensed plumerInstallation carried out y a licensed plumer

$an only e used for athroom and laundry waste$an only e used for athroom and laundry waste

$hec% with your plumer that your pluming is$hec% with your plumer that your pluming issuitale for retrofitting of the devicesuitale for retrofitting of the device

&ot suitale for poorly drained soils ' (ng )eport&ot suitale for poorly drained soils ' (ng )eport

All current setac%s applyAll current setac%s apply $ross connection prohiited$ross connection prohiited

Manufacturer to provide list of all SA AgentsManufacturer to provide list of all SA Agents

greywater-treatment.ppt

Documents

Transcript of greywater-treatment.ppt