Performance and treatment assessment of a pilot-scale decentralized greywater reuse system in rural schools of north-central Chile

2022 ◽  
Vol 174 ◽  
pp. 106460
Author(s):  
Carolina Rodríguez ◽  
Fernanda Carrasco ◽  
Rafael Sánchez ◽  
Natalia Rebolledo ◽  
Nicolás Schneider ◽  
...  
Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 729
Author(s):  
Rosanna Ginocchio ◽  
Eduardo Muñoz-Carvajal ◽  
Patricia Velásquez ◽  
Ady Giordano ◽  
Gloria Montenegro ◽  
...  

The Mayten tree (Maytenus boaria Mol.), a native plant of Chile that grows under environmentally limiting conditions, was historically harvested to extract an edible oil, and may represent an opportunity to expand current vegetable oil production. Seeds were collected from Mayten trees in north-central Chile, and seed oil was extracted by solvent extraction. The seed oil showed a reddish coloration, with quality parameters similar to those of other vegetable oils. The fatty acid composition revealed high levels of monounsaturated and polyunsaturated fatty acids. Oleic and linoleic acids, which are relevant to the human diet, were well represented in the extracted Mayten tree seed oil. The oil displayed an antioxidant capacity due to the high contents of antioxidant compounds (polyphenols and carotenoids) and may have potential health benefits for diseases associated with oxidative stress.


2021 ◽  
Vol 266 ◽  
pp. 107052
Author(s):  
Jessica M. DePaolis ◽  
Tina Dura ◽  
Breanyn MacInnes ◽  
Lisa L. Ely ◽  
Marco Cisternas ◽  
...  

1975 ◽  
Vol 14 (70) ◽  
pp. 155-170 ◽  
Author(s):  
Cesar N. Caviedes ◽  
Roland Paskoff

The extension of the Quaternary glaciations has been studied in the semi-arid Andes of north-central Chile, where the glacial modelling is striking. In the Elqui valley (lat. 30°S.), two glacial advances were identified reaching down to 3 100 m (Laguna glaciation) and 2 500 m (Tapado glaciation). In the Aconcagua valley (lat. 33°S.), moraines from three major glacial advances were found, at 2 800 m (Portillo glaciation), 1 600 m (Guardia Vieja glaciation) and 1 300 m (Salto del Soldado glaciation).The Quaternary glaciations were linked with a decrease of temperature, but more significantly with a marked increase of precipitation probably related to an equatorward shift of 5–6 degrees of the austral polar front. The results obtained in the semi-arid Chilean Andes are correlated with those recently reported from other sectors of the southern Andes.


2012 ◽  
pp. 57-69 ◽  
Author(s):  
Ana Elizabeth Cortés ◽  
Ricardo Oyarzún ◽  
Nicole Kretschmer ◽  
Henrique Chaves ◽  
Guido Soto ◽  
...  

2021 ◽  
Author(s):  
Madeleine Jean Craig

Using shower wastewater to flush toilets decreases the potable water demand of residential buildings, reducing pressure on existing water supplies. “Off- the-shelf” greywater reuse systems intended for single-family residential dwellings have recently become commercially available, but have variable field performance. A standard field testing methodology was developed and applied to a greywater reuse system installed in 23 homes in Southern Ontario. Performance was quantified by measuring the water balance, water quality, energy consumption, durability, maintenance requirements, installation process, economics and user satisfaction with the system. The tested system was found to save, on average, 40.9 litres per household per day, occasionally meet water quality guidelines and generally have less maintenance and durability issues than previous generations, resulting in satisfied users. However, due to low water rates and high capital costs, there is a need for government subsidization of these systems which will ultimately, reduce pressure placed on centralized water infrastructure.


Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1071 ◽  
Author(s):  
Remi Valois ◽  
Nicole Schaffer ◽  
Ronny Figueroa ◽  
Antonio Maldonado ◽  
Eduardo Yáñez ◽  
...  

High-altitude peatlands in the Andes, i.e., bofedales, play an essential role in alpine ecosystems, regulating the local water balance and supporting biodiversity. This is particularly true in semiarid Chile, where bofedales develop near the altitudinal and hydrological limits of plant life. The subterranean geometry and stratigraphy of one peatland was characterized in north-central Chile using Electrical Resistivity Tomography (ERT), Ground Penetrating Radar (GPR) and core extraction. Two sounding locations, two transversal and one longitudinal profile allowed a 3D interpretation of the bofedal’s internal structure. A conceptual model of the current bofedal system is proposed. Geophysical results combined with porosity measurements were used to estimate the bofedal water storage capacity. Using hydrological data at the watershed scale, implications regarding the hydrological role of bofedales in the semiarid Andes were then briefly assessed. At the catchment scale, bofedal water storage capacity, evapotranspiration losses and annual streamflow are on the same order of magnitude. High-altitude peatlands are therefore storing a significant amount of water and their impact on basin hydrology should be investigated further.


2019 ◽  
Vol 30 (2) ◽  
pp. 239-255 ◽  
Author(s):  
Andrés Troncoso ◽  
Felipe Armstrong ◽  
Francisco Vergara ◽  
Francisca Ivanovic ◽  
Paula Urzúa

Technology has been a central theme in archaeological discussion. Different approaches have been developed in order to understand and better explain the processes that lead to the production of objects and things. The anthropology of technology has been one such effort, with its focus on technological style and the chaîne opératoire. In this paper we argue that, despite their many contributions, these approaches tend to isolate the process of production, as well as to see it as the imposition of culture over nature. Instead, we propose a relational approach to technology, one that considers the multiple participants in the social actions involved, stressing the affective qualities of the different entities participating in the process of making. We focus this discussion on the production process of rock art in North Central Chile by Diaguita communities (c. ad 1000–c. 1540), arguing that making petroglyphs was a central activity that aimed at the balancing of the world and its participants, creating a mediating space that facilitated connectedness between the multiple members of the Diaguita world, humans and other-than-humans.


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