SIDASA Tratamiento de Aguas, S.L. applies and develops the most innovative technologies in order to aim three complementary consequences:

• To apply the most innovative technologies and products for each problem.
• To design and manufacture facilities and to apply products where recycling is always considered.
• To manage environmental problems as a technical and economic improvement and not as simple necessary expense.

Services

• Oil separator.
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    Residual oils can be easily separated from water by making them go through a pack of oleophilous corrugated plates.

    FREYLIT oil separator speeds up the natural process of oil/water separation as this is enhanced by the change in speed and direction of the water when running through the corrugated plates.

    The plates are made of polypropylene and are stacked at a distance of 6 mm or 12 mm by means of spacers. The plate separation will depend on the disposal quality requested.

• Vehicle washing.
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    Water used in vehicle washing systems is recovered through gravity in a decanting chamber in which sand and big sized solids in suspension are kept.

    By means of gravity it is conducted to a second recipient, acting as a lung, sending the water to the recycling system. The pumping is done through a pump specially designed for sludge, sheathed to avoid the transfer of particles having a size above 3 mm.

    FREYLIT recycling systems receive the water and carry out the bacteriological treatment pointed out returning the water to the recycling deposit.

    Recycled water is used in vehicle washing either in the pre-washing as in the washing stage, while tap water is preferred for final cleaning and waxing.

• Vacuum evaporation.
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    Evaporation is a technology intended to: concentrate dilute solutions in order to manage a lower waste volume, obtain solid products having an added value, reuse the evaporated water, and so on... Many industrial sectors are using evaporation, for instance: paper, pharmaceutical and food-processing industries, being also used more and more frequently for the depuration and treatment of effluents. The most commonly used applications are:

    • Oily solutions concentration: degreasers, taladrines, etc...
    • Bath concentration, resin regeneration effluents, etc...
    • Salt crystallization for chemical and food-processing industries.
    • Rinses and electroplating baths recovery.
    • In print industry: ink treatment, ink concentration, as well as rinses from washing rolls.
    • Distilled water recovery, “Zero Discharge”
• Thermocompression.
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    Thermocompression is a technique used to evaporate aqueous solutions, based on heat recovery through the compression and reuse, as heating fluid, of the vapour generated in the evaporation stage, thus obtaining a dramatic energy save. We can highlight as the most outstanding features:

    • Low energy consumption. Approximately 65 W/l
    • Evaporation flow between 20 and 1000 l/h
    • Manufactured on stainless steel with titanium.
    The main applications thermocompression evaporators have are:
    • Oily effluents concentration (exhausted degreasing baths, taladrines, etc...)
    • Zero discharge in phosphating lines.
    • Nonincrusting effluent treatments and low-medium corrosion.
• Potabilization.
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    Water for human consumption should be either physical-chemical as bacteriological safe:

    • Physical: water should be transparent, without any turbidity nor colour or odour.
    • Chemical: it should have the right dissolved salts content and an absence of harmful products.
    • Bacteriological: the presence and growth of specific micro-organisms affecting human health should be controlled.

    Therefore, drinking water treatments should be aimed at reaching these three levels, once achieved; water will be suitable for human consumption.

    Natural water can be non-drinkable due to one, two or three of the levels mentioned, thus the target potabilization treatments should have is to work out the foresaid levels, preventing them to occur while in storage and /or distribution.

• Reverse osmosis.
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    Reverse osmosis is a separation process that uses pressure to force water through a semi-permeable membrane having a highly small pore. By this we retain on one side of the membrane all the water compounds having a size higher than the membrane pore, obtaining, consequently, water having a high quality. This water can be used in many different processes such as food-processing, boiler feedwater, drinking water, industrial manufactures, etc...

    Its cost is low, besides, not only does it eliminate dissolved salts, but separates colloids, bacteria, virus and organic material.

• Water treatment.
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    Water is the most common compound on Earth, its physical-chemical features makes it unique (dielectric constants, density, boiling and melting point). In its natural state, and depending on the ground, it contains some impurities in major or minor degree. It is necessary, then, to treat it before or after use, as to:

    • Meet human consumption regulations.
    • Meet the requests of the processes in which it is going to be used.
    • Meet disposal regulations.
• Acid recovery.
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    Since nowadays acid solutions are widely used in industry as metal strippers, surface activators, neutralizers, protective agents or even providing anti-corrosive properties, their handling has become extremely important, either by their volume as by the cost it implies.

    Throughout their working life acids get usually loaded with metals or any other product affecting their working efficiency, therefore, depuration becomes essential with the resulting expenses on chemical products and waste management.

    The combination of different techniques such as: vacuum evaporation, crystallization, ionic delay, ionic exchange, ultra-filtration, etc..., together with technologies exploiting energy and the use of special materials, make possible, at present, to treat important effluent flows, recovering the acid bath working performances and obtaining, besides, and added value.

• Industrial sewage.
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    Water is widely used in general industry processes such as:

    • Heat transfer (cooling or heating).
    • Raw or manufactured material rinse.
    • Machinery, installations ....cleaning.

    Anyway, due to the scarcity of water, it should be rationally used, that means reusing it to its maximum and consuming the minimum volume.

    ABefore disposal, it should be processed as to meet prevailing local regulations concerning waste disposal. Depending on the industry type and the purpose it is intended for, water can have a wide variety of pollutants; therefore, each particular industrial sewage system should be expressly designed for every specific industry and final discharge point.

• Water recycling.
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    All manufacturing processes have to take into account the need to re-use the water consumed, as there is a sharp scarcity of this basic element. In the same way, it is indispensable to make the most of human consumption water employing it in less demanding applications such as garden irrigation, street hosing-down, etc...

    EWater re-use systems design will combine one or several water treatment techniques as to adjust water coming form a specific usage to meet the requests the re-use point requests.

• Sulphate and chloride removal.
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    Industrial waste waters usually contain substantial amounts of pollutants such as chloride, sulphate, or even nitrate, which, due to their specific nature, are difficult to purify.

    These ions, once dissolved, increase the water salinity, thus making it not apt for disposal.

    These ions come from decalcifies or demineralizers regeneration, salted or food curing processes, surface treatments, etc...

    Vacuum evaporation technology allows to concentrate in a highly reduced volume these elements, as well as to re-use the evaporated water in manufacturing processes, especially when associated to a manufacturing process having an energetic excess (chimney smokes, cogeneration, etc...)

• Crystallization.
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    Crystallization can be used in the purification of electroplating baths, which are loosing their working efficiency due to the salt formation, and these salts can be withdrawn from the process as crystals though crystallization.

    As examples we can mention:

    • Sulphuric acid iron pickling.
    • Hydrochloric acid iron pickling.
    • Carbonate removal in alkaline, cyanide, copper, zinc, brass.... baths.
    • Waste chloride removal and recovery from processes

     

• Lixiviation Treatment.
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    Lixiviation is produced when rainwater goes through a waste dump. Rainwater, when percolating through solid waste material, drags out solids in suspension, dissolved salts, organic matter and other polluting agents.

    Lixiviation chemical-physical features are hard to specify as they depend on the area pluviometry, the season, waste material stored, and so on.

    SIDASA’s environment department has a wide experience in waste treatments, either urban as industrial, as to succeed in producing water suitable for disposal, that is to say, water meeting the most demanding requests.

    Technologies such as vacuum evaporation, ultra-filtration, crystallization, reverse osmosis, gas treatment, etc… are used in each specific situation to meet the strictest standards, achieving, besides an energetic optimization.