Resumen de The silent treatment: : How minerals are giving water a new lease of life
"If the cost of caustic soda is around $400/tonne, there is an economic advantage to using MDH generally," he continues. "MDH for this application will typically sell for $500/tonne, but you use far less of this than you would with caustic soda." "The demand for caustic soda is not solely determined by the demand of caustic soda itself. Caustic soda is produced as a by-product of chlorine," [Roland Murenik] says. "If there is vast demand for chlorine, then there will tend to be an excess supply of caustic soda in the market and price of caustic soda will drop." Dave Johnson of US-based Premier Magnesia concurs with Murenik that MDH has many benefits: "It produces less sludge at the back end of the wastewater treatment process. Therefore, you pay less in disposal costs. Certainly, MDH is safer than caustic soda," he says. "If you put your hand in caustic soda it will burn it. MDH is non-hazardous and safe to handle."
