BAYAMO, Cuba, Sep 09 (IPS) – In a single day, tons of of individuals within the rural neighborhood of Las Mangas, situated in Granma province in japanese Cuba, realised one thing that they had already suspected: that the water that they had been ingesting for many years was not precisely crystal clear, however moderately “salty”, as they are saying.
It was definitely a constructive change, because of a desalination plant that began working in August, 5 years after building started in 2019, with a US$ 61,000 funding by the Granma Provincial Delegation of Hydraulic Sources.
“We did a take a look at and the water coming from the plant freezes clear, whereas the water from the road freezes white, due to impurities. Now, with the plant, the individuals are pleased,” neighborhood consultant Rodolfo Echavarría, 55, informed IPS.
Las Mangas is a part of the municipality of Bayamo, the provincial capital, some 740 kilometres east of Havana. It has water networks that carry water from a nicely to the connections within the homes.
Nevertheless, the water supply accommodates a salinity charge exceeding one gram of soluble salts per litre of water, the restrict permitted for human consumption by the nation’s well being authorities.
“The desalination plant was constructed on the outlet of this brackish nicely, serving as an easy accessibility level (the place individuals can fetch the processed liquid with containers),” defined Yasser Vázquez, deputy sub-delegate of the Water Sources Delegation in Granma, in an interview with IPS in Bayamo.
The brand new facility, the third of its sort within the province, processes 2,000 litres of water a day and, in accordance with the planners’ estimates, advantages 1,097 inhabitants. Echavarría believes that quantity rises to nearly 2,000 individuals, for the reason that villages of El Chungo, La Bayamesa and Santa María, all greater than three kilometres from Las Mangas, additionally profit.
The plant’s purification system makes use of the reverse osmosis methodology, one of the vital widespread globally. There are others akin to distillation, freezing, hydrate formation, flash evaporation or electrodialysis.
Reverse osmosis entails making use of stress to brackish water and making it circulate via a semi-permeable membrane whose position is to permit the solvent (water) to cross via, however not the solute (dissolved salts).
In essence, the water in a pressurised saline answer is separated from the dissolved salts because it passes via the membrane after which goes via additional rounds of filtration and chemical injection till it reaches the required requirements of potability.
An area resident, Yoel González, 52, was skilled to function the plant and is in command of its upkeep.
“You must know the way it works, as a result of there are issues that may go flawed, as has occurred. I’ve lived all my life in Las Mangas and the most effective factor that has occurred right here is that this (the set up of the desalination plant). Water has all the time been troublesome. We used to drink that brackish water, and you may style the acid and salt in it,” he informed IPS.
A change of surroundings, or moderately, of waters
On this village eight kilometres from the town of Bayamo, between 6:00 am and 6:00 pm, when the desalination plant opens, individuals collect on the web site’s solely present faucet and fill various-sized containers.
The water popping out of the faucet in each residence or facility in Las Mangas, the brackish water that hardly comes out of the nicely chlorinated, is just used for cleansing, dishes, laundry and typically cooking. On this agricultural and livestock farming village, some farmers additionally use it to quench their animals’ thirst.
“When the plant was arrange, individuals stated at the start: ‘I drink it from the road, I have been ingesting all of it my life and I have not died’. Cubans are like that. However after they tried the brand new one, every part modified,” argued Echavarría, the neighborhood chief.
Nancy Gómez, 72, was born there and is among the few individuals who resists the change.
“The neighbours are stunned as a result of I do not search for recent water, however I am used to it and it has by no means triggered me any well being issues. My kids grew up ingesting that (brackish) water. However my granddaughter does convey it from the plant for the kids and I drink it once in a while. You’ll be able to style the distinction,” she informed IPS.
Oscar Fajardo, 50, has all the time prevented ingesting water from the nicely since he moved to Las Mangas 4 years in the past from Guasimilla, eight kilometres away.
In his residence city, the water tasted recent and “candy”, so he by no means obtained used to the brand new saltiness. Even after shifting away, Fajardo nonetheless fetched it in Guasimilla on his electrical bike at any time when he visited his mom.
“I’d search for water there or elsewhere. Typically I needed to drink the dangerous one, however after seeing the sediment that gathered within the knobs and pots, I attempted to keep away from it. Individuals right here have tailored to ingesting brackish water, however a couple of discovered alternative routes,” he informed IPS.
Whereas it was widespread to boil and drink the faucet water, some individuals who knew higher or had extra money would go to Bayamo or El Chungo to fill their very own family containers, or purchase the liquid from homeowners of horse-drawn carts, who would promote 200 litres for the equal of US$ 0.40.
“The desalination plant is a good profit, a marvel. If one thing as vital as water shouldn’t be good, think about the injury it causes to well being,” stated Fajardo.
Risks of salinated water
The dangers of consuming water with extra salt are different: upset abdomen, dehydration, hypertension, fluid retention within the physique or kidney injury.
In any case, salt accommodates, along with the chloride electrolyte, sodium, a mineral dangerous to the human physique in some ways when ingested in giant portions.
The World Well being Organisation (WHO) recommends an consumption of not more than 5 grams of salt per day, equal to 2 grams (2000 mg) of sodium.
González, the operator of the Las Mangas desalination plant, stated the neighborhood has a number of circumstances of kidney stones (additionally known as nephrolithiasis or urolithiasis), that are arduous deposits product of minerals and salts that type contained in the kidneys and might have an effect on any a part of the urinary tract.
They might have arisen from extended consumption of brackish water, as a number of villagers interviewed by IPS suspect.
“One among my kids complains when he urinates due to the stones, and he will get renal colics on a regular basis,” stated Gómez, the resident who’s reluctant to drink the water processed by the plant.
Marisol Hildago, 37, additionally a resident of Las Mangas and mom of two, used to drink faucet water till one thing triggered her to start out searching for water from El Chungo.
“My father suffered from continual renal insufficiency and that is why I began to search for water there. Now we solely drink water from the plant and my father has improved,” she informed IPS.
Water points within the province
Las Mangas shouldn’t be the one neighborhood in Granma with water-related points. There are others the place the subsurface basins and water sources have excessive ranges of salinity, which regularly obtain ingesting water from tanker vehicles.
Granma, generally known as the ‘Key to the Cauto’ (river), the place the longest watercourse in all of the Antilles flows at 343 kilometres, additionally has a low-isometric aid and boggy areas, which makes it extra weak to seawater encroachment and saline intrusion into the water desk, as occurs in Las Mangas and different locations.
Some students declare that the river’s circulate has decreased partly as a consequence of local weather change, deforestation and the development of the Cauto del Paso reservoir, the third largest within the nation and inaugurated in 1992.
With the decreasing of the river degree, seawater encroaches with larger pressure via the course itself, affecting the water basins of some lands on the mouth of the Cauto.
This province with 804,000 individuals – in a rustic with a inhabitants of 10 million – has had a steady water scenario with its provide sources for the reason that heavy rains of June 2023, which, along with filling reservoirs and restoring the water desk, destroyed a part of the infrastructure.
Granma typically suffers from droughts which, in accordance with water authorities, have an effect on as much as 100,000 of its inhabitants.
When this occurs, river circulate decreases and saline intrusion from the ocean will increase, disabling quite a few wells, particularly the shallower, artisanal ones, that are an answer for residents in locations which are troublesome to entry.
The opposite main downside lies within the accessibility of water networks and the supply of the service, as solely 76% of the province’s inhabitants receives piped water of their houses and solely 38.7% (some 310,000 individuals) obtain water at residence no less than as soon as each three days.
Different extra affected areas, such because the coastal municipality of Manzanillo, can get water provides for as much as 20 days. In all, greater than 66,000 residents are provided by water tankers.
An additional 15 desalination crops are deliberate for Granma, to be added to the handfuls present all through the nation. Within the final decade, the Cuban authorities has promoted the development of those hydraulic works, each in communities with salinised water sources and in industries and seaside resorts.
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