NDLI: Onsite wastewater differentiable treatment system (OWDTS), an ecological sanitation alternative for developing countries

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Onsite wastewater differentiable treatment system (OWDTS), an ecological sanitation alternative for developing countries

Content Provider	Semantic Scholar
Author	Zavala, Miguel Ángel López Funamizu, Naoyuki Takakuwa, Tetsuo
Copyright Year	2002
Abstract	In this paper, the Onsite Wastewater Differentiable Treatment System (OWDTS) is presented as an ecological sanitation alternative for developing countries and supported by principles such as dry ecological sanitation, ecologically sustainable development, recycle of resources (water and nutrients contained in toilet wastes), conservation of water resources, protection of public health and the prevention of public health risk. The OWDTS constitutes a new approach for improving the traditional onsite wastewater treatment systems and it is proposed based on a differentiable management and treatment of household wastewater effluents. Three fractions of household wastewater have been differentiated, reduced-volume blackwater, higher-load graywater and lower-load graywater. Based on this differentiation, different treatment processes required for each fraction are discussed. Aerobic biodegradation using sawdust as a matrix is an essential process for treating the toilet wastes (reduced-volume blackwater). In case of graywater, a sketch of treatment processes is pointed out. Membrane technology araises as a candidate alternative for treating higher-load gray water, whereas natural soil treatment system is considered for the lower-load graywater. However, both processses need to be deeply studied. A brief overview of the undertaken research for supporting scientifically the OWDTS is included.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.bvsde.paho.org/bvsaidis/mexico26/ii-062.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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