Hossein Karimi

10 Questions 18 Answers 0 Followers

Questions related from Hossein Karimi

How can I determine the HCO3 and CO3 concentration and pH value of water in effluent stream of a CO2 stripper?

To reduce CO2 concentration and increase pH value of RO permeate water a CO2 stripper system shall be used. The stripper system includes a packed bed column that provides required surface for...

27 November 2017 9,040 5 View

Which chemical (lime, soda, NaOH) is more effective for softening of high TDS water?

I need to treat water with following chemical component with high permeate recovery using reverse osmosis process: Na: 13890.8 ppm SiO2: 139.4 ...

14 December 2015 1,031 4 View

Can we use seawater reverse osmosis membranes for desalination of brackish water feed?

Dear all I have to desalinate a feed water with about 2000 ppm total dissolved solids (TDS) using reverse osmosis process and the product water TDS should be less than 10 ppm. According to Filmtec...

08 July 2015 2,729 7 View

What is the optimum flow rate for continuous turnover of drinking water?

Dear all There is a drinking water tank with 12000 lit capacity. Tank material is 3 layer polyethylene. Tank is filled with fresh drinking water once a week and water used during the week. To...

19 April 2015 5,190 14 View

What is the interaction effect of a pump station series?

Dear all, As shown in the attached file, consider 2 pump station in series, the first pump station consists of 3 parallel pumps (each pump works at BEP with 10 m3/h capacity and 5 bar pressure)...

05 January 2015 3,707 4 View

Can anyone help me to deconvolute the O 1s high resolution XPS spectra?

Wide scan spectrum of a fully aromatic polyamide surface shows the presence of 15.7% Oxygen, 9.2% Nitrogen and 75.1 % carbon.According to my experiment, I expect to have 3 functional groups in my...

28 November 2014 253 10 View

What is the optimal number of elements for each pressure vessel in reverse osmosis plant?

Hi all, I want to simulate a large capacity (>40 m3/h permeate production) seawater desalination reverse osmosis plant. So, I need to find the perfect RO membranes configuration. My main...

06 October 2014 276 11 View

Can anyone help with the design of a refrigeration cycle?

Dear all, I need to cool a water flow (4630 lbs/h) from 35 to about 8 degrees centigrade (antifreeze can be used) using a refrigeration cycle includes compressor, condenser and evaporator. This...

26 September 2014 4,316 8 View

How can I make a "Particle_input.dat" file for MFIX?

I need to run a 3 dimensional DEM simulation by Multiphase Flow with Interphase eXchanges (MFiX) software. So, I need to make a Particle_input.dat file. However, I don't know how can i make this...

05 April 2014 9,175 2 View

How can I find the reaction rate constants and enthalpies for interfacial polymerization of m-Phenylenediamine (MPD) and Trimesoylchloride (TMC)?

Synthesis of polyamide TFC membrane is performed with interfacial polymerization of aqueous solution of MPD with organic solution of TMC. Three series of reactions are performed in interfacial...

14 March 2014 701 3 View