Document Detail

Two-step optimization of pressure and recovery of reverse osmosis desalination process.
MedLine Citation:
PMID:  19534146     Owner:  NLM     Status:  MEDLINE    
Driving pressure and recovery are two primary design variables of a reverse osmosis process that largely determine the total cost of seawater and brackish water desalination. A two-step optimization procedure was developed in this paper to determine the values of driving pressure and recovery that minimize the total cost of RO desalination. It was demonstrated that the optimal net driving pressure is solely determined by the electricity price and the membrane price index, which is a lumped parameter to collectively reflect membrane price, resistance, and service time. On the other hand, the optimal recovery is determined by the electricity price, initial osmotic pressure, and costs for pretreatment of raw water and handling of retentate. Concise equations were derived for the optimal net driving pressure and recovery. The dependences of the optimal net driving pressure and recovery on the electricity price, membrane price, and costs for raw water pretreatment and retentate handling were discussed.
Shuang Liang; Cui Liu; Lianfa Song
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  43     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-06-18     Completed Date:  2009-07-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3272-7     Citation Subset:  IM    
College of Environmental Science and Engineering Shandong University 27 Shanda Nanlu, Jinan, Shandong 250100, China.
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MeSH Terms
Membranes, Artificial
Osmotic Pressure
Seawater / chemistry*
Sodium Chloride / isolation & purification*
Water Purification / economics,  methods*
Reg. No./Substance:
0/Membranes, Artificial; 7647-14-5/Sodium Chloride

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