Characterization and treatment of grey water for irrigation purpose


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Title Characterization and treatment of grey water for irrigation purpose
Period 02 / 2005 - 12 / 2009
Status Completed
Dissertation Yes
Research number OND1309966


Grey water (GW) contributes with 50 to 80% of the total domestic wastewater inflow. Its low contribution of N, P, and K (respectively 3%, 10% and 34%) to domestic wastewater makes grey water an important portion of the water cycle. Considering the characteristics and the reuse options of grey water, it is treatment is a must. The variation in the grey water characteristics in terms of quantity and quality even on the same source level (houses, institutions, hotels, office building etc.) makes given general recommendations regarding planning and design of grey water plant difficult. None of the studied grey water treatment systems were able to produce all the test period stable effluents; none of the design parameters and operation conditions of the tested systems were studied and optimized. This makes further study a must for applying these systems to a full-scale treatment plant.
Four stages are required to achieve the target of this research.
1. Characterization of grey water from different sources, in terms of their quantities (daily volume) and qualities (pollutants concentrations), in addition to student flat grey water, which will be used as a standard grey water . Drinking water qualities used for generating different grey water sources are analysed. A grey water inflow hydrograph and pollutograph for the studied properties are created. The aerobic and anaerobic biodegradability, conversion rates and the solid filterability of each grey water stream and the combined stream are determined and kinetic constants calculated
2. The values of latter constants will be used to construct and operate a lab scale treatment system, to treat practical grey water (originating from a student flat), under selected operational conditions. The design parameters and operational conditions are determined in order to achieve the required effluent qualities.
3. The laboratory scale results are used to construct and operate a pilot plant at a student dormitory. The performance of the system in summer and winter, in terms of the effluent quality (BOD, SS, turbidity, nutrients and pathogens) will be demonstrated.
4. The laboratory scale data are used to construct a computer model, based on the IWA models (Henze, et al., 1987). The pilot plant results will be used also to predict the validity of latter model. The computer model should predict the performance of the selected technology using other sources of grey water, and other boundaries (other reuse standards) and to determine the design parameter, the operational conditions and the economic feasibility of the new sources and the new standards.
[Keywords]: Grey water; characteristics; treatement; biological treatement, disinfection

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Related people

Supervisor C.J.N. Buisman
Co-supervisor G. Zeeman
Doctoral/PhD student l. Abu-Ghunmi

Related research (upper level)


D15600 Hydrospheric sciences
D18120 Surfacewater and groundwater
E15000 Environmental studies

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