11_Greywater_Management_-_NETSSAF_20080714.ppt

8/9/2019 11_Greywater_Management_-_NETSSAF_20080714.ppt

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IEES

Dr. Johannes HeebBahnhofstrae 2, CH-6110 Wolhusen, Schwei!hone" #$1-%0&'(-)666*+0 a " #$1-%0&$1-$(0$0'0 e ail" /ohannes.heeb seecon.ch

Network for the Development of Sustainable Approaches forLarge Scale Implementation of Sanitation in Africa NETSSAF

Coor ination Action

!roposal"Contract Number# $%&$''

A Coor ination Action supporte b( the European Commission un er the Si)thFramework !rogramme within the * +L,-AL C.AN+E AND EC,S/STE0S *

!rogramme Starting Date# 1st 2une 3$$4

Face5to5Face Training Course

Capacity Building for Ecological Sanitation

+re(water 0anagement


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Greywater Definition

Greywater is wastewater generated by household processes such aswashing dishes, laundry and bathing. Greywater is distinct fromwastewater that has been contaminated with sewage, which is knownas blackwater [1].

source: [3]


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Greywater Gardens

source: [(]

source: [)]* simple greywater management

systems+

* direct utilisation of greywater+

* facilitate breakdown of organiccompounds and reco"er nutrients+

* drain greywater #without any pre&treatment$ to swales or trenches,

which are filled with mulch material+* ub&mulch or abo"e the surface of

mulch application+

* periodical replacement ofdecomposing mulch #wood chips,bark chips, rice husk, etc.$+


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#photo: /. 0afler$

#'am(les of Greywater Gardens) $ndia

#photo: /. 0afler$


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Greywater "owers

source: [(]


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*ori+ontal ,*-C./ & ertical -low Constructed .etlands , -C./

source: [(]

source: [(]

* preliminary treatment of greywater ine.g. settlement tank for solid&li uidseparation #oil and fat, hair, lint, foodresidues, etc.$+

* subse uent treatment of greywater inreed beds also known as hori ontalflow constructed wetlands #2 40$ or"ertical flow planted gra"el filters

#5 6G $ also known as "ertical flowconstructed wetlands #5 40$+

* application of pretreated greywaterhappens continously by gra"ity flow#2 40$ and intermittently by means of

siphons or #solar&operated$ pumps#5 40$+

* 2 40 differ from 5 40 as part of thefilter is permanently soaked andoperated aerobically, ano-ically #no freeo-ygen present but nitrates$ andanaerobically+


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Advantages & Limitations of *-C. and -C.

* 0$1 !"AL -L . C !S"02C"#D .#"LA!DS

AD A!"AG#S L$%$"A"$ !S

* feeding by gra"ity flow is possible+ * re uired surface area+

* treated water is fit for non&potablepurposes #e.g. surfaceapplication$+

#0"$CAL -L . C !S"02C"#D .#"LA!DS

AD A!"AG#S L$%$"A"$ !S

* reduced surface area incomparision to 2 40 * intermittent feeding re uires eithera #solar&operated$ pump orsufficient "ertical distance forinstallation of siphon tank

* treated water is fit for non&potablepurposes #e.g. surfaceapplication$+


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#'am(les of *-C.) !e(al

#photo: /. 0afler$


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#'am(les of -C.) !e(al

#photo: /. 0afler$


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Si+ing of Small3Scale *ori+ontal -low Constructed .etlands

source: [(]

11_Greywater_Management_-_NETSSAF_20080714.ppt

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