Creating added value
Lime as a raw material
Lime is an inexpensive and naturally occurring product that Miljøkalk produces at our own facilities.
Limestone, or calcium carbonate (CaCO3), is a type of rock that is found all over the world. It belongs to a group of rocks called carbonates, which primarily contain minerals with carbonates (CO3-2).
Lime is a collective term for calcium carbonate (CaCO3), calcium hydroxide (Ca(OH)2) and calcium oxide (CaO). Calcium carbonate (CaCO3) is found in natural deposits. To make calcium oxide (CaO), limestone is heated to high temperatures. When water is added, heat is generated and the calcium oxide becomes calcium hydroxide (Ca(OH)2), also known as “slaked lime” or “hydrated lime”.
At Miljøkalk, we have our own EN ISO 9001 laboratory for quality control of our products. We have accumulated a huge database of historical measurement data that provides in-depth knowledge and confidence in our products. This contributes to flexibility and rapid follow-up of any customer enquiry locally in Norway. We work closely with the Norwegian Institute for Water Research, with an unwavering focus on optimal water quality for smolt and for the process leading up to smoltification.
Lime generates added value for our customers: As a natural product, lime helps stabilise pH values in hatcheries and to neutralise CO2 produced by the fish, in addition to being environmentally friendly.
Lime milk is slaked lime dissolved in water. It acts as a strong base that easily increases pH values. In addition to the pH effect, slaked lime reacts with CO2 to form calcium bicarbonate. This is extremely beneficial for the production of smolt as it increases the buffer capacity without a notable increase in CO2 levels. This provides a good production environment, an effect you do not get with lye (NaOH).
The Aqua Balance System can be adapted to customers’ individual needs with regard to space utilisation and other wishes. The Aqua Balance System is a system that controls lime logistics, pH and dosing of lime milk in the process water of RAS facilities or other types of facilities. The system is closed, dust-free and reliable. An accurate system that is gentle for fish and safe for operating personnel, with a focus on minimal manual handling of chemicals.
Using lime in hatcheries is a safe, simple and effective way to ensure optimal conditions for smolt. We process, store, transport and fill your silo or warehouse. As Miljøkalk has local production plants here in Norway, we can use the Agri Balance System to safeguard quality, efficiency, logistics and – not least – the environment.