HORTICULTURE IRRIGATION SUPPLY
WATER SOURCE WELL WATER YEAR INSTALLED 2016
Agriculture is an important market for Mexico, with the industry employing 16% of the national workforce. Unfortunately, it also presents a huge, unsustainable demand on water sources. In Mexico, agriculture is responsible for 77% of the total water withdrawn.  38% of countrywide withdrawl is from groundwater aquifers, many of which are over-exploited and located where annual rainfall is insufficient to replace extraction.  Water scarcity is causing increased salinity variability as well as increasing water prices  , both of which are unfavorable for crop growers. What’s worse is that for many crops, high salinity in irrigation water can cause significant reductions in yield.  Mexico UN – water brief; http://www.unwater.org/fileadmin/user_upload/unwater_new/docs/Publications/MEX_pagebypage.pdf  Richard Rhode, Tony Burton, Geo-Mexico excerpt, http://www.mexconnect.com/articles/3576-water-consumption-in-mexico  Mexico Water Report; http://www.lgaconsulting.com/water/IE-MexicoWaterReport-2011Winter-WaterReuseInMexico.html
A leading Mexican tomato grower was purchasing tomato seedlings from a third party and growing their own greenhouse crops. They needed an optimal, improved feed water quality to grow their own seedlings, rather than purchasing them locally. Tomato seedlings are known to have high sensitivities to salinity, therefore the grower needed a solution to treat their irrigation water to allow for in-house growing.
CAPDI © SOLUTION
Voltea provided an IS-12 CapDI System as it requires minimal pre-treatment and can cope with silica levels up to 150 ppm. Additionally, the fully automated cleaning and remote monitoring capabilities minimize user intervention and maintenance, allowing the customer to focus on their core business. CapDI tunably removed sodium and bicarbonates without having to remove all of the more beneficial minerals in the grower’s irrigation water. By implementing a tunable TDS removal solution, they saved on OpEx by reducing the use of fertilizers and allowing water reuse on-site. This Voltea customer now successfully grows their own seedlings in-house without having to purchase from a third party, thus increasing profitability.
Of high importance to the grower was the ability to target a series of different sodium levels as required by different crops. CapDI’s tunable salt removal capability perfectly achieves this by automatically accounting for any variations in feed water quality and flow rate to give a consistent output quality. Table 1 on the following page shows a series of targeted water conductivities and their corresponding sodium and bicarbonate concentrations.
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