Levels of Manganese in Raw Water
Levels of Manganese in Raw Water
(OP)
I've been asked to find out what the minimum level of Manganese in a Raw Water would lead to the installation of a Manganese Removal Process in a new Build Water Treatment Works.
As 25ug/l is the Utility's Design Target Mn level in final water (95%-ile), would it be fair to assume that a 95%-ile of 25ug/l Dissolved Mn in raw water would necessitate a Manganese removal process (as no dissolved Mn would be removed by a conventional treatment process) or double this in the raw water of Total Manganese i.e.50ug/l.
What in general is considered high Manganese level in a raw water source.
Cheers,
J
As 25ug/l is the Utility's Design Target Mn level in final water (95%-ile), would it be fair to assume that a 95%-ile of 25ug/l Dissolved Mn in raw water would necessitate a Manganese removal process (as no dissolved Mn would be removed by a conventional treatment process) or double this in the raw water of Total Manganese i.e.50ug/l.
What in general is considered high Manganese level in a raw water source.
Cheers,
J





RE: Levels of Manganese in Raw Water
A work group in USEPA developed an RfD based on a Greek study of manganism due to drinking water exposure. A lowest oberved adverse effect level of 2 mg/l and a no observed adverse effect level of 0.17 mg/l were identified.
Reference: Water Quality and Treatment AWWA.
RE: Levels of Manganese in Raw Water
Gary Schreiber, CWS VI
The Purolite Co.