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Showing posts with label RO. Show all posts
Showing posts with label RO. Show all posts

Tuesday, August 22, 2017

RO REJECT WATER TREATMENT

 RO REJECT WATER TREATMENT

1. Almost 30-45% water is rejected from an RO system. The increase in TDS percentage in reject water will be somewhere close to 33% higher than the input TDS. The reject water from an RO system is fed directly into a 2nd RO unit to reduce the quantity of reject water. The reject of the second RO is thermally evaporated or treated by root zone technology.
2. REUSE: Most reject water, with a TDS level of 1200 - 1500 PPM can be safely used for car washing, flushing toilets , gardening etc.
3. ROOT ZONE TECHNOLOGY: If there is land available, we can use this water selective plantation suitable for high TDS after pH correction. The reject water from RO is subjected to  root-zone technology applying sacrificial plants typha-reeds or cayhna-indica etc. Only plants can use the in organics. This is how Nature is designed. The remedied water can then be used for other grass/ greens/Irrigation.

4. Thermal Evaporation: Evaporation is a time-tested methodology for reducing the water portion of water-based waste. The evaporator converts the water portion of water-based waste to water vapor, while leaving the higher boiling contaminants behind. Thermal Evaporator heated by natural gas or other available heat sources like boiler steam can evaporate water to atmosphere very effectively. Multiple effect evaporators  are costly and energy guzzling.

5.RO reject water should never be added to ETP water or rain water harvesting system.

Sunday, August 16, 2015

Why RO water purifier in the kitchen( Domestic 10 LPH Reverse Osmosis ) ???




There are advantages and disadvantages in every technology.

CASE STUDY: NEW DELHI.
The area where I stay in New Delhi,India, the ground water is contaminated because of Dirty Yamuna River flowing nearby. And there is no piped water from Govt. The only option for drinking is Domestic RO (10 LPH) at home or the 20 liter JAR supplied by PRIVATE water companies. And for all other purposes ,people are installing water softener in the bore well water..If they dont use water softener,then the domestic RO membrane gets damaged and is to be changed twice a year.

RO is the only technology which can remove Bacteria, Iron, fluoride, Arsenic and other chemical contaminants. Arsenic and other heavy metals in well water is one of the most dangerous aspects of drinking well water. So you should have a fail safe water purifier system for Arsenic by installing a Point of Use - RO water purifier in the kitchen where water for drinking and cooking is taken.Reverse Osmosis is though expensive, is available as domestic filter. Once the membrane is clogged, it cant filter water anymore, so you always get pure water. This is not so with any other technology.


What is the desirable quality of drinking water?
As per the Bureau of Indian Standards, the desirable quality of drinking water is that which has TDS (Total Dissolved Salts) content of 500 ppm or less (ppm stands for parts of the salt present in a million parts of water). Where water of this quality is not easily available, the compromise level is water having upto 2000 ppm.
It is to be borne in mind that in some places, iron salts may be present and if the content of iron salts is more than the permissible 0.4ppm, even if the total salt content is less than the desired level, the iron salts will have to be removed before drinking that water. There are also some pockets West Bengal and U.P. where the water contains Arsenic. This is poisonous and so here also the same rule applies. In some pockets again, fluoride salts may be present which affect the bones if that water is drunk. Using this water for non-potable purposes is however not harmful.
Another point to be remembered is that water with very low salt content is not very palatable and therefore where the total salt content is less than 500, reducing it to 10 or 20 by RO is not only meaningless from the point of view of wastage of water but also from the cost and loss of palatability aspects. In cases where the salt content is not much higher than 2000 ppm, a simpler route would be to harvest rainwater which will dilute the salts and bring it within potable limits progressively.

What is the Reverse Osmosis (RO) Process?

Reverse Osmosis (RO) technology has been used for years in various industries to separate dissolved solids from water by forcing the water through a semi-permeable membrane. RO is also commonly used to purify drinking water and desalinate seawater to yield potable water. The water and other molecules with lower molecular weight (specific weight of molecules allowed to pass through is dependent on the selected membrane) pass through the micropores in the membrane, yielding a purified water stream called the permeate. Larger molecules are retained by the membrane as well as a portion of the water that does not pass through the membrane. This concentrated stream is called the concentrate or RO reject.



REVERSE OSMOSIS PERCENT REJECTION CALCULATOR    http://www.apswater.com/calcs.asp

While RO is an effective method for handling wastewater, what to do with the concentrate or reject water (typically as much as 20-40% of the RO feed water volume) can be an issue. Specifically, the high salinity in RO reject / RO concentrate can make it prohibitive for discharge to a local sewer facility. Hauling the wastewater to a treatment facility can also be prohibitively expensive.

What can we do with the RO reject water?
In RO systems of small capacity suitable for domestic purposes, the rejected component may be as high as 40%. The process therefore is a wasteful one with much of the water having to be thrown away.
Diverting large volumes of this highly salty water into the sewage line could result in acting against the smooth movement of its contents. The reject will not be tolerated by normal garden plants. It will form deposits on the floor and sanitary ware. It is also not advisable to divert it to the septic tank.
If the water subjected to RO has less than 1000 ppm say, then the salt content in the reject water will not be much and it can be used for gardening or flushing. But the point is that this water need not be subjected to RO at all in the first place.
In Industries, we treat RO Reject by Solar evaporation or Forced evaporation.
evaporation is a time-tested methodology for reducing the water portion of water-based waste.
Typical RO reject / RO concentrate TDS concentrations are often in the range of 30,000 – 50,000 mg/liter. The salts in solution can range from highly soluble sodium and potassium salts to less soluble or reverse soluble calcium and barium salts.



Sunday, October 09, 2011

How ENVO was born



ENVO IS MY BRAND & WAS BORN ON 1994. THE FOLLOWING IS THE STORY OF ENVO.

My career began with my respected Uncle  Prof Dr. A.F.S.A.Aowal, I learned the ABCD of  waste water treatment from him. I was working under him as part time lecturer at Delhi college of engineering, Kashmere Gate,Delhi .

Also, I was working as design engineer in National Associates, Delhi. I was staying in 27,Hayat manzil, Basti hazrat nizamuddin, delhi at that time.

ONE FINE MORNING IN 1994, I FOUND MYSELF ALL ALONE. EVERYONE WORKING WITH ME AT NATIONAL ASSOCIATE DESERTED ME WHOLESALE. 

That first kick stunned me for three days and I sat at banglawali masjid (Headquarter of Tabligh Jamaat) at basti Hzt nizamuddin for three days to find out my own roots. A few like my Father  Syed Ishtiaque Ahmad saheb,  Prof Dr. Rashid Hayat Siddiqui saheb of AMU, Dr Chandra Prakash Ji , Vipan Kundra Ji etc gave me "MORAL" support. And M/s Syed Envo Protect (India) Pvt Limited, New Delhi was finally born in 1994....the ENVO brand was born in 1994. Mr.Vipan Kundra, my CA was one of the share holders.It is Vipan kundra ji who gave and registered the name Syed Envo Protect (India) Pvt Limited even without consulting me,because I  was in Assam at that time. He told me that one day I will become international ,thats why he added india to the name. 

 Later I opened one another company by the name of Envo Projects, New Delhi which is still continuing by the grace of God when the private limited company was dissolved due to various reasons.

I received my first career break of my company Syed ENVO PROTECT (I) PVT LTD , a  consultancy at rupees five thousand only at M/s Shade and colors in okhla industrial area phase –I of owner Mr.Deepu Marwah. It’s a cloth dyeing factory.

I left my part time lectureship job in Delhi college of engineering, kashmere gate, delhi  just to concentrate on my own company ENVO. Each and  Everyone called me "lunatic" at that time as nobody was doing full time consultancy in water and waste water treatment in 1994, almost everyone had a govt job. Only gupta ji of Ghaziabad and a few are in the market as full timers. So i jumped  at a completely unknown thing with full confidence in GOD AND MYSELF.At that point of time nobody imagined that this pollution control sector will grow such like this. I created a tag line for my company “THE POLLUTION CONTROL PEOPLE” which i still use in my letterhead.


Many companies are created later on with my credentials and full support by the grace of God. Now i have taken it for granted. I mean, its natural to have a new team after each two three years.So i never try to stop people,anyway they will go , so let them go and try their own luck, good for them, good for me also..But this time as a safety device  i have retained my own company "Envo Projects" under my sole control (Owner) so that i can fall back. People always learn from mistakes. Life is the best teacher.

AND NOW TODAY(09/10/2011), FROM MY HEART I  THANK ALL MY CO WORKERS WHO ARE WITH ME NOW AND WHO LEFT, WITHOUT THEIR BLOOD AND SWEAT ENVO PROJECTS WOULD NOT HAVE BEEN WHAT IT IS TODAY.BECAUSE ITS MY LEARNING CURVE TOO. I ALSO MADE MANY MISTAKES DURING THE GROWTH AND LEARNED FROM IT.

Change your attitude towards life. Do not look for perfection and CONTROL in everything in life. I understood that my livelihood (RIZQ)  cant be  taken away by  anyone.  Put your  best  efforts in what you do and than leave the result to ALLAH. I have plan but Allahs plan is much much better than mine. I have firm belief in ALLAH.  

 

During this journey many people came and left me. I thank all of them for their contribution for my growth. They are destined to be with me for that particular period. This is Allah’s plan.

 

Always sleep with a clean heart. I know many of us get wronged throughout the day or have gotten wronged in the past. Forgive. Not only forgive, but forgive and forget. Dont even hold a grudge against that person in your heart. Keep your heart completely pure.Forgive brothers and sisters before you sleep each night. this is one of the practices of the greatest people ever to live and this is how we will reach those highest levels of spirituality.

 

Forgiveness is good for your own well being, its about giving yourself permission to let go of the painful past. Forgiveness is not something we do for that particular toxic person,it is something we do for ourselves so we can move on to a better future.We forgive,not because that toxic person deserves it,but because we deserve peace, for a pure heart.


MY STRUGGLE STORY PUBLISHED IN YOURSTORY.COM
Also read please same story in my blog