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3W Treatment Process – Unique cost-saving CSO (Combined Sewer Overflow) Control technology modifying existing activated sludge process developed by OSAKA City

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“3W (Wet Weather Wastewater) treatment process” is an innovative treatment technique developed by Osaka city which can treat 3 times volume of sewage inflow, and greatly reduce the pollutant load of combined sewer overflow in wet weather by modifying the existing treatment facilities. Combined sewer system has been widely prevalent in Osaka City due to the installation easiness and low cost, but this combined system presents pollution in wet weather because untreated sewage is discharged from combined sewer outfalls or pumping stations together with stormwater when sewage flow exceeds the capacity of sewer systems.

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Low cost greywater treatment and use in irrigation for poverty reduction in rural areas of water scarce countries in the MENA Region

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The Middle East and North Africa (MENA) Region is facing chronic water scarcity, which is very severe in some countries such as Jordan and Yemen. INWRDAM had been involved since February 2000 in greywater research activities in Jordan, Lebanon and Yemen. Houses in rural areas in the MENA region are usually simple and this makes it possible to separate greywater from black water with minimal modification of sewer pipes inside the house. In 2000 INWRDAM conducted a comprehensive evaluation of the potential for greywater reuse in rural areas of Jordan.

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Decentralized Treatment of Wastewater from Public Toilets for Clean Environment

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Sulabh International has been constructing and maintaining over 7500 public toilet complexes spread all over India, out of which 190 are linked with biogas plants. Biogas produced from human excreta is channelized and used for different purposes e.g. cooking, lighting, warming oneself during winter, heating water and electricity generation. The engine to covert biogas to electricity is run 100% on biogas. But its unpleasant colour, odour, presence of pathogens and high BOD content limit makes it unsuitable for direct discharge into a water body. For safe disposal of human waste, it was important to make the effluent free from odour, colour and pathogens.

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ORGANICA as wastewater treatment in the heart of the city

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ORGANICA’s wastewater treatment technology makes use of a  plant ecosystem composed by the attached biofilm developing on the roots of tropical plants,20 cm under the water  in a compact wastewater treatment plant, covered by a greenhouse.  The roots are an essential part of the ORGANICA technology.  Ultraviolet rays also play an important role in the development of the plants and thus of the root medium.

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Wastewater Treatment and Reuse in Arid Areas

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Improving the access of 20 vulnerable Bedouins households to a non conventional water resource through construction of 20 household GWWTs to collect and treat gray wastewater with a treatment capacity of 0.5 m3 in average for each unit to be used in irrigating of 500 m2 home gardens which were establishes, planted and irrigated through utilizing this permanent source of unconventional water for supplementary irrigation.

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Innovative public-private management of wastewater evacuation and treatment in a Cambodian small city

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The purpose of the project in Trapeang Sab Commune was to improve the sanitation situation of the village by:

  • installing a DEWATS (decentralized wastewater treatment) for 250 households and small businesses;
  • providing technical and institutional solutions adapted to the needs;
  • contributing to a production of references for sanitation sector;
  • involving local authorities and communities.

The priorities of the project were on one hand to integrate collective and individual sanitation and on the other hand, to promote a low-cost technologies easily operated by implementing a simplified sewer system able to collect treat 100m3/day of wastewater. The objectives were to reduce groundwater pollution from the unsafe traditional sanitation practices and to reduce associated health risks and foul odors caused by this poor wastewater handling.

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Combining wastewater treatment and sludge reduction for biogas production (the New A2O process)

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In a context of wastewater reuse and energy saving being important issues for wastewater treatment in the coming future, this is a technological solution which aims at solving the problems at the same time; combining wastewater treatment and sludge reduction for biogas production.

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New Nanosystem Mixed Reactor for Urban Wastewater Treatment

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In this solution, the synergitic effect of ozonatation, ultrasonic waves and nanophotocatalyst reactions led to treatment of wastewater at high efficiency. This nanoreactor can be removal surfactant, dyes and other toxic organic waste. Also, it can be sufficiently decrease COD, BOD and TOC from natural industrial and domestic wastewaters. This photoreactor contain of several section for achieving maximum efficiency in water and wastewater treatment.

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The planted filters for the treatment of wastewater from rural communities

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A renowned specialist for the treatment of wastewater and septage with reed bed filters, EPUR NATURE proposes custom-fit ecological and economical sanitation solutions for rural areas.    More than 650 planted filters in operation, some of them for over 20 years, attest the performance of our technologies under variable climatic conditions.  With the numerous variants which we have developed, it has become a cost-efficient and sustainable solution for treatment of wastewater in a wide variety of situations.

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Sanitation Plan for the Santiago Basin (Chile): improving wastewater treatment coverage from 3% in 1999 to 100% in 2012

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An important step in the process of modernizing the Chilean sanitation sector is represented in the plan of sanitation of the Santiago water basin, consisting of an ambitious project headed by Aguas Andinas, a company partly owned by AGBAR since the privatization in 1999.  The plan was conceived as a necessity on a national level to contribute to improve, in a significant way, the quality of life for more than 6 million inhabitants and guarantee a state of environmental sustainability. 

 The solution included the construction of more than 20 waste water treatment plants and several collectors. This plan and the continued strategy of investment of Aguas Andinas since 2000 has allowed to move progressively to increase the coverage of wastewater treatment from 3% in the year 1999 to 89% in 2010.  The coverage will reach 100% in 2012.

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