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Advanced waste water treatment for water reuse

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Desinfix: An advanced chlorine-free wastewater disinfection concept as an alternative to chlorine-based disinfection methods. It has performic acid (PFA) as an active substance, which a highly efficient biocide. This innovative technology is developed to meet the required microbiological standards, for instance, in various water reuse applications (agricultural and landscape irrigation, recreational applications, industrial water reuse applications). Desinfix is a fully biodegradable solution that provides rapid, safe and very efficient disinfection at low doses and with low total disinfection costs. Technology has low carbon footprint.

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Post-Earthquake Recovery Wastewater System Stabilization Ponds, Cooperative Maule, Chile

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The earthquake that affected Chile in February 2010 brought with it a range of consequences on infrastructure and people’s way of living. The effects were particularly stronger from the VII region downwards. Thus, the small town of Maule, with a population of 20.000 people, suffered among other things, damages to its waste stabilisation ponds system (WSP). Basically, the left-hand side embankment (in the flow direction) slid off and cracked allowing for wastewater exfiltration from the facultative pond. Moreover, the chlorine contact chamber for disinfection got tilt in the same direction of the flow. Therefore, the cooperative association of water and sanitation services providers (FESAN, www.fesan.coop) started the action plan to recover and improve the WSP at Maule. This manuscript therefore reports on the results of an expert technical mission carried out in 2010 to assess the likely recovery of the WSP system.  The assessment was promising and the objective is to refurbish the whole system by implementing the contemporary environmental thinking paradigm where water decontamination technology is better understood and implemented if applied holistically with respect to its environmental context. Therefore, the ecosystem services concept together with the ecological engineering approach and the implementation of a Water & Sanitation Learning Centre, will be at the heart of this water quality solution.

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Community-led Integrated Waste and Wastewater Management

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To enhance the livelihood of the Sano Khokana community and to increase residents’ access to basic water and sanitation facilities, an integrated decentralized waste and waste water treatment system has been constructed by community members with support from the local NGO Lumanti Support Group for Shelter and the UN-HABITAT Water for Asian Cities Programme Nepal. The system, which has been constructed on land contributed by the community, consists of a biogas plant with linked compost plant/ slurry drier and a reed bed treatment system. It ensures that residents now properly manage their waste and utilize the approach and its outputs for energy generation, irrigation and as fertilizer.

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Utilization of Wastewater for Irrigation purposes

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Human impacts on freshwater systems are substantial in most populated parts of the world. Over-extraction of freshwater, mainly for agriculture, has lead to significant degradation of rivers, lakes and aquifers. Liberation of water for the environment through substitution with wastewater has been promoted as a means of reducing anthropogenic impacts (Hamilton et al. 2005ab). According to the water stress index i.e. the ratio of a country’s total water withdrawal to its total renewable freshwater resources, about half of the countries of Europe are under water stress (Bixio 2005).

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