Hello,
Can anyone suggest me any cost effective physico chemical process through which ammoniacal nitrogen can bring down from 2000 ppm to less than 50 ppm.
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instead of physio chemical treatment ..why dont you use it for agriculture purpose followed by recharge. Addition of chemicals might bring you expected results but if you revise the Life cycle...you are polluting back...so use this water after nominal reduction of BOD/COD (sedimentation, floculation etc). Dilute the N to permissible limits which can be used by farmers as nutrient to crops.
Another option is pesiculture and lotus culture in a separate tank before it enters the disposal unit which can be surface water bodies and artificial lakes. These natural process reduces N upto 60% - 70% , also considerable reduction of organic matter.
This also brings aesthetic view and development of eco tourism...for parks , green belts...
Please let me know the source of your wastewater or influent.
Hey,
Its certainly a good thing that there is going to be a biological treatment process. At the given flow, and for the effluent characteristics,my guess is you can easily tweak the available biological treatment and modify it to give you complete denitrification something on the lines of MLE. In this case ammonia cannot be recovered. But it is the most cost effective. Lets discuss it a little more. My email is ykanitk@clemson.edu
Thanks,
--
Yogendra Kanitkar
Bhaskar Mondal said:
Hello Mr. Kanitkar,
We are talking about a flow of 250m3/D which can be go upto 600m3/D depend upon treatment scheme with minimum treatment cost... as treated effluent will pass through biological treatment process, so treated effluent should not carry any harmful effect which will minimise working efficiency of microbes...
Thanks
Yogendra Kanitkar said:
Hello,
Can you send me details of below mentioned process with their side effects over TDS and COD, this treated effluent will pass through ASP (Activated Sludge Process) after this physico-chemical treatment so it is also necessary to keep TDS and COD level low.... resins will not work regeneration will take place frequently, .... I am interested in process a and d... can u provide me much more detail... u can mail me at bhaskar040422@gmail.com
shahul hameed kp said:
Mr. Pillai,
Quantity is 250 m3/D, at ambient temp., pH<1, TDS = 50,000 ppm, COD=10,000-12,000 ppm, BOD=3,000-3,500 ppm, NH4-N = 2,000 PPM, Ca++= 400-500 ppm.
Effluent characteristic is given above and quantity is also given...
If you want any more description just let me know i ll provide....
Thanks,
Bhaskar Mondal
Prof Dr V N Sivasankara Pillai said:
Hello,
Some of the low-cost physico chemical ways to remove ammonical nitrogen from wastewater are;
a. Addition of limestone and GAC into a batch reactor,
b. Ammonium selective inorganic zeolites such as clinoptilolite,
c. Nitrate selective organic synthetic resins.
d. Physico-chemical denitrification of effluent by adding zinc powder and sulfamic acid at acidic pH (<4).... And many more such methods are available....
Shahul Hameed kp
(Environmental Engg., S.J.C.E, Mysore)
Dear Mr Bhaskar,
More choosing a scheme it needs to know the quantity, temp, pH, TSS and concentration of ions present in the medium. It is also desirable to know the use of treated effluent.
Hey,
I am just a rookie at this. But 2000ppm is a very high level. Are you sure biological process is not an option. It will be very cheap to install something like an RBC or a dedicated denitrification system. What is the BOD of the water? If its high enough a dedicated de nitrification would be the best way to go ahead.
Chemical process...Chemical oxidation would be an option. Use a strong oxidant like chlorine thats going to convert Ammonia to nitrate, solving your problem. Since DBPs are not regulated in India..Don't worry about it. A facility like this is very cheap but uses a lot of space.
Also what kind of flow are we talking about here? For lesser flows/ volumes you could use ECP. Electrocatalytic Precipitation. People say costs are less. I really do not know much about these.
Give me some more inputs...
--
Yogendra Kanitkar
Activated sludge process is not a physico chemical process...its biological. There is no guarantee that complete denitrification will occur. It depends on the SRT and reactor config. It is still the cheapest (operational cost) way to remove nitrogen, but comes at a hefty (capital cost)
--
Yogendra Kanitkar
Durga venkata prasad.G said:
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