greywater Articles

  • Reusing Greywater and Stormwater in California

    Raphael Garcia, an associate at Rana Creek, discussed the idea of reusing your greywater for your landscaping needs, saving money and helping the planet. The first ever TEDxMonterey took place on April 16th, 2010 and enjoyed participation from over 400 people both in person and online. Community leaders and innovators all assembled at the Monterey Institute of International Studies around the ...


    By IWA Publishing

  • Greywater recycling system

    Every new home should have a Grey Water Recycling System! This innovative new product allows you to re-use your greywater (previously wasted) and recycle it for use on your gardens or reuse back through the toilets for flushing or in the laundry. Right now this is so important with low water levels, and water prices and council restrictions on the increase. The Ozzi Kleen GTS10 Greywater system's ...

  • A review of greywater characteristics and treatment processes

    This paper presents a comprehensive literature review of different characteristics of greywater (GW) and current treatment methods. GW is domestic wastewater excluding toilet waste and can be classified as either low-load GW (excluding kitchen and laundry GW) or high-load GW (including kitchen and/or laundry). This review provides information on the quantity of GW produced, its constituents ...


    By IWA Publishing

  • How to tap the energy savings in greywater

    Many operators of offices, hospitals, hotels, large condos, and other buildings are aware of the need to save money and reduce their environmental impact, through better water management. The result has been the growth of ways to reduce water consumption, ranging from low-flow show-crheads to landscaping that requires minimal watering. Building operators are also aware of a similar need to ...


    By DDI Heat Exchangers Inc.

  • Quantification and characterization of greywater from schools

    Survey of schools of different education levels (primary, intermediate and secondary) in Kuwait showed an average greywater generation rate of 7.3 L/p/d and varied  in the range of  2.9 – 16 L/p/d, reflecting the school level of education (i.e. student age). The highest rates were observed for primary schools while the lowest rates were observed in secondary schools where students ...


    By IWA Publishing

  • Characterising microbial quality of household greywater

    In supplementing and substituting existing drinking water supplies with alternative water sources such as greywater, it is important that potential health impacts are considered and that water is safe for its designated purpose. It is difficult to detect greywater-associated gastrointestinal illness at the level of single households, such as might potentially occur following handling of untreated ...


    By IWA Publishing

  • Quantification and characterization of greywater from schools

    Survey of schools of different education levels (primary, intermediate and secondary) in Kuwait showed an average greywater generation rate of 7.3 L/p/d and varied in the range of 2.9–16 l/p/d, reflecting the school level of education (i.e. student age). The highest rates were observed for primary schools while the lowest rates were observed in secondary schools where students are more mature ...


    By IWA Publishing

  • Eco home in Brighton uses Greywater system

    Award winning eco home saves 100litres of water a day Having attended a self-build course, Jackie and Alan employed DRP, a firm of Brighton architects which produced a design that specified a whole range of eco technologies and materials including a grey water recycling system provided by Aquaco. Their new home achieved an 'Ecohomes' excellent standard thanks, in part, to water ...

  • Greywater recycling system installed at Canary Wharf

    First combined Rainwater Harvesting/Grey Water Recycling System to be installed at Canary Wharf in London E14A multi-storey office at Canary Wharf will be installing the first combined Grey,Rain and AC Blow down water recycling system in Canary Wharf. The reclaimed/recycled water will be used for toilet flushing feeding WC's at 9000 litres per hour. The rain and grey water will be collected in a ...

  • Household greywater use practices in Melbourne, Australia

    Research on the potential of greywater reuse to reduce urban tap water demand has focused mainly on permanently installed greywater treatment or irrigation systems. These may be readily implemented in new housing developments, but experience in Australia shows their uptake by established households in urban areas is low. The majority of households employ simple and temporary methods for ...


    By IWA Publishing

  • A comparative study of greywater from domestic and public buildings

    Greywater (GW) can be an important resource for urban water consumption, replacing potable water for purposes that do not require drinking water quality. If applied on a large scale, this practice will reduce the potable water demand and the wastewater produced in urban areas, minimizing the negative impacts and costs of water extraction and wastewater treatment. A correct characterization of GW ...


    By IWA Publishing

  • Potential impacts of on-site greywater reuse in landscape irrigation

    This study investigated the effects of irrigation with different types of waters on soil, plants, and public health. The test plant was ryegrass grown in 12 planters filled with sandy loam soil and irrigated with three types of waters (4 planters for each type): freshwater, raw domestic light greywater (GW), and treated domestic light GW. The sodium adsorption ratio (SAR), EC, pH and alkalinity ...


    By IWA Publishing

  • Physicochemical treatment of office and public buildings greywater

    The current study analyses the performance of deep sand filtration of greywater from an office building and the performance of a combined physicochemical process comprising of coagulation, sedimentation and filtration. Raw greywater quality exhibited very high variability with average turbidity of 35 NTU, and TSS, CODt, and BOD of 45, 240, 75 mg/l respectively. The stand-alone filter removed 50 ...


    By IWA Publishing

  • Disinfection of greywater effluent and regrowth potential of selected bacteria

    Chlorination and UV irradiation of RBC (rotating biological contactor)-treated light GW (greywater) was investigated. The ability of chlorine and UV to inactivate indictor bacteria (FC - Faecal Coliforms, HPC – Heterotrophic Plate Count) and specific pathogens (P.a. - Pseudomonas aeruginosa sp., S.a. - Staphylococcus aureus sp.), was assessed and ...


    By IWA Publishing

  • Treatment of domestic greywater by geotextile filter and intermittent sand filtration bioreactor

    Intermittent sand filtration (ISF) is an efficient system for treatment of greywater; however, the high quality of effluent and the simple set-up contrast with the high failure rate due to clogging of surface layers. The efficacy of several polypropylene non-woven geotextiles (apparent opening size from 0.10 to 0.18 mm) used as primary treatment filters to remove suspended particles from ...


    By IWA Publishing

  • Membrane process treatment for greywater recycling: investigations on direct tubular nanofiltration

    On-site greywater recycling and reuse is one of the main ways to reduce potable water requirement in urban areas. Direct membrane filtration is a promising technology to recycle greywater on-site. This study aimed at selecting a tubular nanofiltration (NF) membrane and its operating conditions in order to treat and reuse greywater in buildings. To do so, a synthetic greywater (SGW) was ...


    By IWA Publishing

  • Development and testing of a low sludge discharge membrane bioreactor for greywater reclamation

    A low sludge discharge membrane bioreactor (LSDMBR) for greywater reclamation was developed and tested in this study. LSDMBR was designed by combining an aerobic activated sludge process with an immersed membrane filtration process. LSDMBR offers the following advantages over conventional activated sludge processes. Firstly, LSDMBR has a high biomass concentration attributed to membrane ...


  • Household greywater treatment methods using natural materials and their hybrid system

    Discharge of household greywater into water bodies can lead to an increase in contamination levels in terms of the reduction in dissolved oxygen resources and rapid bacterial growth. Therefore, the quality of greywater has to be improved before the disposal process. The present review aimed to present a hybrid treatment system for the greywater generated from households. The hybrid system ...


    By IWA Publishing

  • Greywater treatment for reuse: comparison of reuse options using analytic hierarchy process

    The objective of the present study was to: (i) examine the performance of two-stage sand filtration and the effect of coagulants on greywater (GW) characteristics; (ii) assess the quality of treated GW for reuse; and (iii) compare reuse options using the analytic hierarchy process (AHP). Four treatment options were examined on site. The first option was related to two-stage sand filtration ...


    By IWA Publishing

  • Analysis of institutional arrangement for greywater management in unplanned settlements of Kinondoni municipality Tanzania

    Greywater (GW) may contain pathogens and organics thereby calling for its management. Institutional arrangement (IA) is the heart of planning, coordination and management of initiatives. Analysis of IA is key for determination of what could be rectified within organisations based on the existing structure, resources, strategies, data and information, stakeholder participation and involvement, ...


    By IWA Publishing

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