water reuse system Articles

  • Hotel Grey Water/Process Water Reuse - Case Study

    Issue/Challenge A large resort in Mexico wanted to minimize the cost of their potable and process water used in their operations. The company had been using a single pass RO system from a well water source which provided permeate water to their water storage tank. This system was inefficient, producing only 50% of clean water production with the remaining 50% being sent to the municipal ...

  • Impacts of onsite greywater reuse on wastewater systems

    Together with significant water savings that onsite greywater reuse (GWR) may provide, it may also affect the performance of urban sewer systems and wastewater treatment plants (WWTPs). In order to examine these effects, an integrated stochastic simulation system for GWR in urban areas was developed. The model includes stochastic generators of domestic wastewater streams and gross solids ...


    By IWA Publishing

  • Applicability of domestic grey water reuse for alleviation of water crisis in Dhaka City

    Overdependency on ground water resources for meeting the daily water demand in Dhaka City is leading to excessive pressure on ground water aquifer systems and is deepening the ground water table every year. This paper focuses on how reuse of grey water generated from different sources of domestic purposes every day can alter the considerable daily water demand in this city. Sampling and ...


    By IWA Publishing

  • Greywater reuse through a bioretention system prototype in the arid region

    The concept of a greywater-fed bioretention system in arid regions was investigated in this study. Bioretention systems are conventionally used as a source control mechanism for urban runoff. Nevertheless, in arid regions, where rain and urban runoff are not an abundant water resource, their application is limited. Greywater (residential wastewater without toilet and kitchen sources) is ...


    By IWA Publishing

  • Balancing water demand reduction and rainfall runoff minimisation: modelling green roofs, rainwater harvesting and greywater reuse systems

    Recent years have seen a growing interest in more distributed approaches towards stormwater management, often integrated with other forms of distributed management of urban water such as water demand management technologies. This paper focuses on the role of green roofs (GR), rainwater harvesting (RWH) and greywater reuse and their integration at the building level. A number of models were ...


    By IWA Publishing

  • Assessment of the effects of greywater reuse on gross solids movement in sewer systems

    Onsite greywater reuse (GWR) and installation of water-efficient toilets (WETs) reduce urban freshwater demand and thus enhance urban water use sustainability. Research on GWR and WETs has generally overlooked their potential effects on municipal sewer systems: GWR and WETs affect the flow regime in sewers, and consequently also influence gross solids transport. To asses these impacts, a gross ...


    By IWA Publishing

  • Opportunities and challenges for greywater treatment and reuse in Mongolia: lessons learnt from piloted systems

    In Mongolia, as worldwide, communities are challenged by water scarcity, depletion and pollution. Greywater treatment and reuse could partially meet water demand and help protect the environment and health. In March 2010, greywater from six randomly sampled households in the Ger areas of Ulaanbaatar, Mongolia, was analyzed followed by the development of three innovative treatment systems: an ...


    By IWA Publishing

  • Integration of seawater and grey water reuse to maximize alternative water resource for coastal areas: the case of the Hong Kong International Airport

    Development, population growth and climate change have pressurized water stress in the world. Being an urbanized coastal city, Hong Kong has adopted a dual water supply system since the 1950s for seawater toilet flushing for 80% of its 7 million inhabitants. Despite its success in saving 750,000 m3/day of freshwater, the saline sewage (consisting of about 20–30% of seawater) appears to have ...


    By IWA Publishing

  • Safe greywater reuse to augment water supply and provide sanitation in semi-arid areas of rural India

    Water reuse is recognized as a tool to increase water supply in peri-urban areas of semi-arid and arid regions of the world. However, it is an option rarely explored for rural areas in developing countries, and has not been documented extensively in the scientific literature. This paper presents results from 6 greywater reuse systems which were built with the objective to augment water supply and ...


    By IWA Publishing

  • Treatment and potential reuse of greywater from schools: a pilot study

    This study presented performance data on a low cost and easy maintenance pilot system for on-site treatment and reuse of water collected from wash sinks and fountains, as major sources of greywater (GW) at schools. Various treatment options were studied including screening, sand filtration, chlorination, and UV disinfection operated at different flow rates. Results showed that filtration ...


    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 ...

  • Constructed wetlands for urban grey water recycling

    Three differently configured constructed wetlands: a Horizontal Flow Reed Bed (HFRB), Vertical Flow Reed Bed (VFRB) and a novel constructed wetland (the Green Roof Water Recycling System (GROW) patent number GB 2375761) were compared for treatment of weak organic strength domestic grey water for reuse over a period of nine months. Influent and effluent were characterized in terms of standard ...


    By Inderscience Publishers

  • A case study of the conversion of grey water to a flush water source in a Turkish student residence hall

    A case study of the conversion to grey water to a flush water source in a student residence hall of the Turkish megacity Istanbul is presented. Grey water from bathtubs/showers and washbasins is treated and reused for flushing toilets. Raw and membrane bio-reactor (MBR) treated grey water quality was monitored throughout one academic year using parameters to characterize organic matter ...


    By IWA Publishing

  • Looking for grey water treatment solution? Read this!!

    With time, the individuals have understood the value of water and thus have started to re-use the wastewater after treatment. Grey water Reuse is one of the common examples which are being observed nowadays. Mainly, the big hotels and facilities building, which use high amount of water every day, are now adopting the water treatment solution for Grey water. Every day, ...

  • Membrane Bioreactor for Water Mining in New York City

    The Facility The Helena, which opened in late 2005, is an apartment building that offers more than amenities, views, and nice finishes. Behind the $100 million tower’s gleaming glass and metal skin is a serious high-performance building. Its owner and designers say the Helena will annually use 65 percent of the energy and one-third of the potable water of comparable ...


    By Dynatec Systems Inc.

  • Comparison of grey water treatment performance by a cascading sand filter and a constructed wetland

    A novel unplanted vertical flow subsurface constructed wetland technology comprising three shallow beds (0.6 m length, 0.45 m width and 0.2 m depth) arranged in a cascading series and a standard single-pass Vertical Flow Planted Constructed Wetland (VFPCW, 6 m2 and 0.7 m depth) were tested for grey water treatment. Particular focus was on meeting consent for published wastewater reuse parameters ...


    By IWA Publishing

  • Systems Modeling for the Planning of Greywater Management in New Housing Developments in the City of Ensenada, Baja California, Mexico

    ABSTRACTThe implementation of a greywater reuse scheme for new housing developments in Ensenada would achieve significant savings (up to 37%) in water consumption with the corresponding monetary savings in water supply and wastewater treatment. New housing facilities would have green areas irrigated with greywater which would represent ecological and aesthetical benefits to city. A more detailed ...

  • Reliability of on-site greywater treatment systems in Mediterranean and arid environments – a case study

    On-site greywater (GW) treatment and reuse is gaining popularity. However, a main point of concern is that inadequate treatment of such water may lead to negative environmental and health effects. Maintenance of single-family home GW systems is usually performed by home owners with limited professional support. Therefore, unless GW systems are reliable, environmental and public health might be ...


    By IWA Publishing

  • 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

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