The quality of our products has been of great pride to us during all this time. Thanks to its calcination process the calcium oxide we manufacture has certain features, which differentiates it from the rest of limes in the market. With a high level of reactivity it is ideal for certain industrial processes. Our products are applied into the environment for effluent treatment and industrial waste, flue gas treatment, sewage sludge treatment and contaminated soils.
Industrial waste treatment
Lime plays a role in the decarbonization and purifying phases.
Urban and industrial wastewater treatment
Lime is a harmless product in the water treatment techniques. It is easy to handle and is used as a basis allowing the correction of a too low pH:
- As a coagulation agent, for flocculation, neutralization and decanting of suspended materials, allowing its liquid/solid separation.
- For precipitating toxic elements (heavy metals: lead, chrome, copper, manganese, nickel, arsenic, cadmium, zinc, aluminium, iron, etc.…), which are dissolved and are precipitated in the form of hydroxide, and noxious ones (nitrates and phosphates in the form of insoluble salts).
- For disinfecting, eliminating bacteria or virus, as well as the radical suppression of bad smells.
In drinking water lime rebalances the proportion of calcium in water. It remineralizes too soft water or it decarbonizes too hard water (which leaves calcareous deposits).
Pig slurry treatment
In the treatment of slurry and other effluents of cattle breeding, lime guarantees depuration by destroying the disease-producing organisms, taking away the bad smells, and decanting.
Sewage sludge treatment
When the drying of the sludge is done in a mechanical way, lime can be used with different objectives, in the following phases:
A) BEFORE THE FILTERING. The conditioning takes place through the addition of lime milk to the liquid sludge producing an effect of coagulation of the colloidal particles, the increase of the size and weight of the “flakes”, as well as of the content of dry material. At the same time, an improvement in the filterability of the sludge and its sanitation (blockage of the fermentations and elimination of pathogenic organisms, due to the increase of the pH) is achieved.
B) AFTER THE FILTERING. The stabilization and drying of the sludge is obtained by adding unslaked lime to it. In this way, an increase of the dry material content is obtained. The mixture of water with lime results in a temperature increase and the union of one water molecule with a calcium oxide molecule causes the drying of the sludge. The hydration warmth of 1 Kg of lime can warm 2 litres of water from 0° C up to its boiling point at 100° C. Also, a sanitation of the sludge takes place, due to a pH and temperature increase.
Flue gas treatment (desulfurization)
The use of fossil fuels as an energy source generates contaminating elements like SO2 and NOx in the atmosphere causing acid rains generated by urban and industrial waste incinerating plants.
In the processes of dry and semi-dry purification, lime is used due to its absorption qualities of acid pollutants and heavy metals contained in the gaseous effluents.
In the humid procedures, lime is added either in the gas column or in the neutralization of the watery effluents in the washing tunnel.
Lime is the most ideal decontaminant due to its high efficiency, low cost and easy handling. Its high specific surface, porosity and particle size are very much appreciated features for these purposes.
Polluted soils treatment
Lime blocks heavy metals in an insoluble form and helps in the extraction of hydrocarbons and of organic volatile elements.
Leachates of controlled dump ground treatment
Lime makes heavy metals from leachates of dump ground insoluble, in this way, obtaining an inert solid with the aim to avoid the pollution of soils and aquifers.