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Anti-scaling magnetic treatment
7 december 2022
Scaling in drinking water is being prevented by applying
magnetism. A universally agreed mechanism, behind magnetism,
is not yet available. Anti-scaling magnetism has been shown to
be effective by real practice. In particular, recirculated flows with
prolonged exposure, enhanced saturated conditions (i.e. higher
temperatures, higher hardness and electrolyte concentrations)
and coagulation and crystallization particles in the solution, are
associated to successful applications. Commercial devices for
scaling removal through magnetism are available. However,there
are installations where magnetism does not work. Basic
design for magnetic installations and operating conditions
cannot be derived from fundamental knowledge. Since the
characteristics of successful magnetic applications are not
commonly obtained at the drinking water tap it is not likely that
drinking water anti-scaling treatment will be overall effective. At
full-scale water treatment plants no examples of anti-scaling
magnetic installations were found. However, magnetism is being
applied at full-scale water treatment plants to support removal
of specific contaminants. Further applied research should either
focus on water streams with super-saturated conditions, or
research magnetism in combination with separation processes
and nanomaterials.