Mehrnaz Sadrnourmohamadi

12 Questions 12 Answers 0 Followers

Questions related from Mehrnaz Sadrnourmohamadi

Effect of Calcite contactor on pH and alkalinity?

What will be the effect of calcite contactor on water pH and alkalinity? Water hardness after passing through calcite contactor will raise, can we say the same thing for alkalinity and pH as well?...

18 June 2020 4,777 0 View

Suspended air flotation in industrial wastewater treatment?

Hi, I am doing technical due diligence for a technology so-called Suspended air flotation in industrial wastewater treatment. this technology is similar to DAF, but using froth instead of air...

16 April 2020 2,418 0 View

Biological ion exchange on THMs precursors reduction on high DOC water?

I am looking for any studies on effect of biological ion exchange method in reducing THMs precursors in high DOC (15 ppm) and cold water?

03 February 2020 1,230 2 View

Coagulant dosage for Dissolved Air Flotation, Slaughterhouse wastewater?

I am looking for a dosage range of coagulant/flocculant used in DAF system for Slaughterhouse wastewater treatment? is ferric sulfate the one mainly used for that purpose?

12 June 2019 1,317 5 View

Anyone can help me with locating a water/wastewater treatment using Nanotechnology in their treatment process?

There are lots of laboratory studies on nano application in water/wastewater treatment. however not sure if there is any real world treatment plant sample using this kind of technology in its...

09 April 2019 3,789 7 View

Does post-aeration affect the level of chlorine residual in water distribution system?

Post aeration has been recently studied as an alternative to reduce the level of Disinfection By Products. It has shown a promising results in terms of THMs reduction, however nothing is confirmed...

28 July 2017 7,376 4 View

What is the recommended dose of potassium permanganate in drinking water treatment, 0-4 mg/L? How about the cases it is used as pre-coagulation step?

Anyone has any suggestion for recommended dose of KMnO4 used in drinking water treatment plants? Any cases where it has been used as pre-coagulation step and it has worked? Thanks

20 October 2015 9,396 12 View

What is the maximum (negative) for zeta potential value of a surface water with high concentration of humic substances and calcium hardness?

The range of raw water zeta potential is reported to be between -10 and -20 mv, however I got the zeta value of -30 mv for a river water with high concentration of humic substances and calcium...

28 December 2014 4,294 1 View

Can we say that Alc (slow reacting colloidal species of aluminum) measured by ferron is actually solid-phase Al(OH)3 which doent react with ferron?

The ferron assay is used to partition soluble aluminum species into such categories as monomeric, polumeric and colloida species denoted as Ala (reacting with ferron within 1 min), Alb (reacting...

26 November 2014 403 1 View

How can we examine the effect of pH on aluminum species distribution in coagulation?

To examine the effect of pH on aluminum species distribution in coagulation, synthetic water containing 5×10-4 mol/L NaHCO3 and NaNO3 in distilled water is prepared for control experiments. The...

24 November 2014 3,473 7 View

Is 40% of dissolved organic carbon (DOC) removal by coagulation sufficient? Is there any guildline for that?

US EPA has established a two-step process to determine enhanced coagulation requirement for TOC removal where it depends on water TOC concentration and alkalinity. Referring that the minimum TOC...

05 November 2014 1,855 10 View

How can we convert the raw absorbance data to molar concentration in ferron-aluminum assay using standard curve for an acidified mononuclear standard?

I need to find Al species distribution in three Al-based coagulants with different B value

12 January 2014 3,484 6 View