On-site treatment of greywater - turning it into a resource for irrigation and service

Last changed: 22 March 2012

The overall objective of this study is to develop simple, robust and low cost alternatives for treating greywater on site as a safe resource for irrigation of crops. The study will investigate the feasibility of charred and uncharred compost and geotextile for greywater treatment in comparison to sand filter.

The PhD project will consist of lab experiments and pilot plant experiment that will fulfill the following specific objectives:

* Studying the removal of BOD, TSS, MBAS using the four filter materials,

* Determine the best combination of hydraulic loading rate and organic loading rate under which the best performance of the materials (highest removal of BOD, TSS and MBAS) will be obtained

* Studying of biological degradation or accumulation organic pollutants (BOD, TSS and MBAS) within the filter material.

* Studying the clogging potentials of the filter materials.

It should be pointed out that this PhD study is sponsored by the Islamic development bank/Jeddah, and implemented by the Environmental Engineering research group at the Department of Energy and Technology, SLU. The Environmental Engineering research group is a well established research group within Source Separated Sanitation systems (also called Productive Sanitation or Ecological Sanitation).


Greywater investigation (photo by Al Moayyied Assayed)

Greywater collected in the tank (photo by Sahar Dalahmeh)

Greywater discharged under the tree (photo by Sahar Dalahmeh)

Greywater application to mulch (photo by Sahar Dalahmeh)


Project leader: Håkan Jönsson

Co-workers: Sahar Dalahmeh           

Partners: IDB (Islamic Development Bank), SLU

Project period: 2008-2012

Financing: IDB, SLU