Hello Peers,
We are working on a project and need some clarity. What will be the dosage rate of NaOCl if this is injected in raw sewage to maintain a free residual chlorine of 0.5 mg/l. Injection directly in to an ATM tank with a retention of 1 hour. I believe ammonia will consume some hypo...
Hellow Gents
We are designing a Brackish water RO plant, feed water from wells. Flow rate is 300 gpm
The feed water has an Iron 5 ppm, H2S ~50 ppm. pH is 6.8, TDS is ~13,000 ppm, Temp: 25 - 36 deg C
Can we oxidize the Iron completely with NaOCl, then acidify to air strip H2S
Other downstream...
Gentlemen,
We have plans to use Pumice Media as filtration media instead of Sand for cooling tower applications
These media manufacturer claim to deliver <1 micron of particle size, feed particle size vary from 50 - 150 micron, with TSS of 5 - 10 ppm
Feed Flow rate is 750 m3/hr
Do you have...
Anyone please advise if an Activated Carbon filter be back washed with RO brine?
The purpose of ACF is to remove traces of free chlorine and any organics present in the feed sea water, flow rate is ~900 m3/hr
Multimedia filter present upstream of ACF and equipment all together are part of a...
Hi,
Please advise if Horizontal Activated Carbon Filter has equal performance compared to Vertical ones. We have high flow rate in the range of 900 m3/hr of Seawater. Feed SW has free chlorine and organics as well
Please highlight if this is technically possible Pros and cons, past exp and...
We are on task to review and FEED design a CPI separator and require design assistance in terms basic design guidelines or with spread sheet
Regards
NM
We are working on a Condensate polisher unit and require pH correction system at the outlet to raise pH up to 9.0 from 6.5
The conductivity at the outlet of CPU unit is <0.1 mS/cm
What are the typical chemicals used for pH correction. Is ammonium hydroxide an option?
What is the Commodity...
We are working on a Condensate polisher unit and require pH correction system at the outlet to raise pH up to 9.0 from 6.5
What are the typical chemicals used for pH correction. Is ammonium hydroxide an option?
What is the Commodity chemical name, typical concentration, dosing concentration...
Hi
We are designing a low flow brackish RO - 300 LPH permeate with 70% recovery, feed is well water, 2 ppm of FRC
The issue is not able to find a dosing pump. We need to dilute the SBS to meet the lowest available pump flow rate. The ideal concentration of SBS works out to be 5%.
What are...
Having read several threads on H2S removal, I was initially bit reluctant to start a new thread. However i have several questions.
We have brackish well water source with 5.2 mg/l of H2S, 1.5 of Ba, 4.4 of St, 0.08 of Fe, TDS is 8700, pH is 7, HCO3 - 182, Ca/Mg - 432/175. What are all the...
Hellow Gents
Please advise the chemical and the dosage rate for Odor control in Lift stations. Typical dosing rate of (if NaOCl is used) against each gram of H2S
Thanks in advance
Niss
Helow Experts,
We are designing a high pressure pump system and the schematic is enclosed with this thread. Apologies, if the subject has been discussed in depth in the past, but I couldn't find a satisfactory answer in old threads
As you see from the sketch, Is this normal industry and SAFE...
We are working on a project require treating wastewater. Important treatment step is to convert Sulfite to Sulfate be means of Oxidation tower or aeration basins. Do any one have the basis for sizing of the equipment required for this system. please refer to attached file for input if needed...
Hello Piers,
We are designing an Odor control system for a lift station, volume is roughly 1,125 m3.
The sanitary sewage will have anaerobic condition for 5 days in LS. The normal design practice for OC is min 10 ppmv H2S in feed to the Activated carbon absorber.
Can anyone highlight will...
Helow there,
Someone please advise the best and economical ways to remove Vinyl Chloride from 1st Pass RO permeate.
Also highlight the best location in terms of process, either downstream or upstream will be better, of course upstream will have bigger capacity against RO permeate.
Thanks'
Niss
Helow there,
Some one please advise the consequences if the SWRO high pressure pumps is controlled by a Flow control valve instead of VFD.
A quick comparison with pros/cons would help complete my ongoing study
Thanks'
Niss
Helow there
One of our ongoing project, we have 10 nos horizontal Media filters(MMF) arranged in Parallel configuration. There is no FCV at the inlet of MMF, flow will be distributed by the unique frontal piping arrangement. In fact there is manual BFV and a flow transmitter for each MMF...
Helow,
We have a wastewater RO plant project to be designed to treat effluent from an MBR treatment plant. The feed water to our RO is chlorinated downstream MBR plant before being stored in a big tank, from where it is pumped to WWRO plant. FYI, feed to MBR is mixture of refinery WW and a...
Helow
Please advise, is re-mineralization of desalinated water with "H2SO4 dosing & calcite filters" a normal industry practice? What are the limitations and advantages? What is industry standard for treated potable water LSI regulation?
Further, Can anyone advise who can assist with this...
Helow
Please advise, if a discharge Pressure transmitter (not differential) downstream a Centrifugal pump can be used to measure an accurate corresponding flow? Is this normally acceptable in Industry?
Thanks, Niss
