Initial cost analysis of a desalination process utilizing hydrotalcite and permutite for ion sequestration.

Miller, James Edward ; Evans, Lindsey R.

Sandia National Laboratories

关键词: Waste Treatment-Reverse Osmosis Process.;    Economics;    Regeneration;    Waste Water;    Water Treatment;   

DOI  :  10.2172/920443
RP-ID  :  SAND2004-5461
RP-ID  :  AC04-94AL85000
RP-ID  :  920443

美国|英语

来源: UNT Digital Library

【 摘 要 】

An initial cost analysis of a proposed desalination process was performed. The proposed process utilizes tailored inorganic ion exchangers, hydrotalcite and permutite, to sequester anions and cations from a brackish water solution. Three different process scenarios were considered: (1) disposal of the spent exchangers as dry waste (2) conventional chemical regeneration, and (3) acid regeneration of permutite coupled with thermal (550 C) regeneration of hydrotalcite. Disposal of the resin and conventional regeneration are not viable options from an economic standpoint. Applying limited data and optimistic assumptions to the third scenario yielded an estimate of $2.34/kgal of product water. Published values for applying conventional reverse osmosis to similar water streams range from $0.70 to $2.65/kgal. Consistent with these baseline values, the Water Treatment Estimation Routine, WaTER, developed by the United States Department of the Interior, Bureau of Reclamation produced a cost estimate of $1.16/kgal for brackish water reverse osmosis.