Abstract
Based on a research developed in the USA [I] for the subsurface irrigation ofredwood forests(Sequoiadendrum Gigantea), this paper analyzes treated sanitary wastewater reuse as analternative for carbon sequestration and oxygen generation through root assimilation ofnutrients inside them, at rates that consider the transpiration, evapotranspiration andsubsurface infiltration processes in arboreal areas of urban lots. Through buried ecochambers,the tree roots make contact with treated sanitary wastewater (stored in tanks in case its flowexceeds the evapotranspiration capacity of the arboreal area), and pumped according to itsseasonal transpiration rate. This arboreal area will act as a nutrient pump to evapotranspiratepurified water and oxygen while sequestrating carbon dioxide from its roots, withoutcollecting, pumping, treatment and disposal of sanitary wastewater by the public systems,acting as a "Smart Drainage System" which comprises a local sanitary wastewater treatment,as well as the selective rainwater reservation at the urban lot, for multi-useful profits, such as:garden irrigation, sanitary installations, floor and pavement washing, among others.
Highlights
The National Water Resources Policy (Law No 9433, from January 8th, 1997) says in its fundaments (1st Article) that "the management of water resources must be decentralized and it must count on the Public Power, the users and the community"
A preventive approach for the preservation of water resources from the urban basin where the lot is localized would be presented, considering that sanitation technologies can be adapted to social environmental purposes, regarding human and environmental health, safety for the user of the device and/or system, and economical aspects [2]
Based on detem1ined fundamental principles, such as: availability, in all urban areas, of drainage services and the handling of rainwater adequate to public health and to the safety of life and the public and private patrimony; use of methods, techniques and processes that consider local and regional peculiarities; efficiency and economical sustainability; use of appropriate technologies, considering the capacity of payment from the users and the use of gradual and progressive solutions; and the integration of infrastructure and services with the efficient management of the water resources. Such principles fundament in greater or smaller degree the conception of this article, being principles that will be able to pennit the construction of a new vision, marked by a greater interaction between aspects of drainage/handling of rainwater and sanitary aspects, mainly based on the "integration of infrastructure and services [of basic sanitation] with an efficient water resources management", such a vision would be different from the one that has been focused up to now, even though "the water resources do not integrate the public services of basic sanitation (4th Article)"
Summary
The National Water Resources Policy (Law No 9433, from January 8th, 1997) says in its fundaments (1st Article) that "the management of water resources must be decentralized and it must count on the Public Power, the users and the community". The tree's roots are in direct contact with treated sanitary wastewater (stored in tanks in case its flow exceeds the evapotranspiration capacity of the arboreal area), which is pumped according to its seasonal transpiration rate This arboreal area will act as a nutrient pump to evapotranspirate purified water and oxygen while sequestrating carbon dioxide from its roots, eliminating the necessity of collection, pumping, treatment and disposal of sanitary wastewater by the public systems, acting as a "Smart Drainage System" which comprises an in loco sanitary wastewater treatment, and the treatment and the selective rainwater reservation at the urban lot, for multi-purpose uses, such as: garden irrigation, sanitary installations, floor and pavement washing, among others
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