Alkali activated materials (AAM) based on calcined metakaolin or illite clay together with waste by-products. such as waste glass or aluminium scrap recycling waste. were tested as value-added materials for pH stabilization in biogas technology where decrease of pH should be avoided. Porous materials with ability to slowly leach alkalis in the water media thus providing continuous con... https://parisnaturalfoodes.shop/product-category/alkaline-pitcher-filter/