The choice of lime product is very much dependent on the type of waste product to be treated and fit with other treatment technologies. Graymont can assist customers to confirm the correct product types and delivery systems to suit their particular situation and required application.
Please refer to the related product pages shown or contact our sales team about wastewater treatment.
The main benefits associated with lime in potable water treatment are as follows:
Dewatering – Dewatering biosolids with quicklime has potential to reduce operational costs in several areas including lower chemical reduction costs, reduced polymer usage, reduction in wash water required, reduced cartage costs and reduced capital costs for solids storage.
The main applications of lime in industrial wastewater treatment include pH correction, heavy metal management, neutralizing acidic waters, softening water chemistry, precipitation of dissolved materials and water clarification when used with flocculants.
Where tailings contain fine particles or clay, lime products can be used to improve dewatering and recoverable process water. This treatment can also result in improved handling, material strength and a stackable tailings product that can be used in landform reclamation.
Stone Dust and Rock Dust products are made to meet relevant industry specifications and are available in certain packaging types from nominated Graymont sites across the Graymont network. For more information please review the related product pages in the Products section of our website.
With an increase in pH, soluble calcium will become more mobile and modify fine particles in a way that improves settlement. This modification can also reduce the need for additional flocculants while improving the density and strength of the flocs.
Adding lime and controlling pH will lock up soluble metals and convert those metals to a more chemically stable form that is less likely to leach. In addition, when added to soils and sludges, lime can be a very effective way to solidify and dewater materials and manage pathogens of various types. In recent times, lime is being trialed as an aid to improve soil mechanical properties for oil and diesel contaminated soils.
