Ultrafiltration membrane pre-treatment benefits for reverse osmosis process in seawater desalting. Quantification in terms of capital investment cost and operating cost reduction

Desalination ◽  
2007 ◽  
Vol 203 (1-3) ◽  
pp. 277-285 ◽  
Author(s):  
Olivier Lorain ◽  
Berengère Hersant ◽  
Françoise Persin ◽  
Alain Grasmick ◽  
Nathalie Brunard ◽  
...  
Desalination ◽  
2010 ◽  
Vol 250 (2) ◽  
pp. 557-561 ◽  
Author(s):  
J.J. Lee ◽  
M.A.H. Johir ◽  
K.H. Chinu ◽  
H.K. Shon ◽  
S. Vigneswaran ◽  
...  

Author(s):  
ERICK ABDUL MUTAKABBIR ◽  
NELLA NAOMI DUAKAJU

Ornamental plants are commonly planted by people as decoration. This study aimed to determine income and financial feasibility of ornamental plants business in Samarinda City. This study was done in three months since November 2017 until Januari 2018 in Samarinda City. The sampling method used purposive sampling method with the number of samples as many as 29 respondents.  The data were collected through interviews with respondents. The assesment of business feasibility  was done by using some investment criterias such as Net Present Value (NPV), Internal Rate of Return (IRR), dan Net Benefit Cost Ratio (Net B/C Ratio). The results of this study showed that ornamental plants business in Samarinda City owns the average of investment cost of IDR90,982,931.00 year-1, the average of operating cost of IDR37,307,586.00 year-1, the average of revenue of IDR118,506,206.00 year-1, and the average of income of IDR81,198,620.00 year-1. The assesment results of investment in ornamental plants business in Samarinda City are NPV of IDR75,074,609.00 at discount rate of factor of 12%, IRR of 65%, while Net B/C Ratio of 1,82. This is showed that ornamental plants business in Samarinda City is financially feasible to be done.


Desalination ◽  
2018 ◽  
Vol 431 ◽  
pp. 106-118 ◽  
Author(s):  
D.T. Myat ◽  
F. Roddick ◽  
P. Puspita ◽  
L. Skillman ◽  
J. Charrois ◽  
...  

Author(s):  
Man Djun Lee ◽  
Pui San Lee

This chapter gives an overview about reverse osmosis membrane desalination technology and process. Desalination process can be considered as one of the crucial processes in obtaining fresh water to meet the increasing fresh water demand throughout the world. Desalination process begins with the intake of seawater or brackish water. The intake system usually comprises a pump and piping system. Then, the seawater goes through pre-treatment process. From there, the treated seawater will go through desalination process. The most widely used desalination is membrane desalination utilizing reverse osmosis membrane. After desalination process, the fresh water will go through more filtration and a series of post-treatment. Post-treatment consists of conditioning and stabilizing the water for distribution. This chapter concludes with a case study to illustrate the operation and sustainability of a small-scale desalination plant that utilizes brackish city polluted water as source.


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