COPY RIGHTS : TO AVOID COPYRIGHT VIOLATIONS, ALL POSTS ARE SHOWN ALONG WITH SOURCES FROM WHERE ITS TAKEN. PLEASE CONTACT ME IN MY EMAIL SALEEMASRAF@GMAIL.COM , IF YOU ARE THE AUTHOR AND YOUR NAME IS NOT DISPLAYED IN THE ARTICLE.THE UNINTENTIONAL LAPSE ON MY PART WILL BE IMMEDIATELY CORRECTED.

I HAVE SHARED ALL MY PRACTICAL WATER TREATMENT EXPERIENCES WITH SOLVED EXAMPLE HERE SO THAT ANYBODY CAN USE IT.

SEARCH THIS BLOG BELOW FOR ENVO ,COMPACT STP,ETP,STP,FMR,MBBR,SAFF,IRON,ARSENIC,FLUORIDE,FILTER,RO,UASB,BIO GAS,AERATION TANK,SETTLING TANK,DOSING,AMC.

SEARCH THIS BLOG

Friday, August 25, 2017

How to develope MLSS in aeration tanks of STP


How to develope MLSS in aeration tanks of  STP

1)Add two tanker (10,000 liter) of activated sludge water  having seed culture (microbes) from settling tank of  existing similar plant from similar industry located anywhere nearby to the aeration tanks of your STP, so that microbiology develops in your aeration tanks. Adjust pH of aeration tank. If you can get domestic waste activated sludge from a working STP plant, it will also work.
Now put the aeration tank to operation in continuous mode by feeding continuously with wastewater with sludge re-circulation as per design re-circulation rate but without any sludge wasting till the biomass concentration reaches to design MLSS. During this phase collect and analyze MLSS samples at every 12 hour interval.
Once the design MLSS concentration is achieved start sludge wasting as per design.

2)  The better of many procedures will be as follows.
1. Fill the aeration tank with water which is not having a TDS of more than some 200 mg/l.
2. Dump cowdung at 10 % of the weight of the water in the tank.
3. Start the aerator and allow aeration for 48 hours.
4. Stop the aerator by about 8 AM on day 4 and allow settling in aeration tank itself for three hours.
5. Syphon out the top supernatant for 10 % of volume.
6. Repeat steps 2 to 5 for 5 to 6 cycles.
7. By this time, bacterial mass would establish.
8. Repeat steps 2 to 5 for 3 to 4 cycles with 5 % cowdung and 5 % raw effluent instead of full 10 % of cowdung.
9. Add micro nutrients as in attachment every the cowdung / effluent mix is added.
10. At this stage verify the raw effluent COD and settled supernatant COD.
11. Let us know the COD values at this stage and based on this we can proceed further.
It is usual that it takes about 3 months to establish a culture like this method. What happens in this method is the bacteria are allowed to go through a mutation process and also grow by retaining its "genetic memory" in its DNA. This way, the acclimatised bacteria once grown will never get knocked out.
There are other methods whereby people buy "enzymes" and start using or use "ready made" dried cultures. These will give excellent results to start with but they are from a different "gener" and will collapse very quickly in case of shock loads.
Thanks & Regards
Dr. S.Sundaramoorthy
Technical Advisor (ex-Engineering Director of Chennai Metropolitan Water Supply and Sewerage Board)

3) For a project this size, the best way is to get 2 tankers of activated sludge from a nearby municipal treatment plant. This is also the cheapest and quickest way. Everything else will take considerable amount of time. The second best alternative is to buy bacterial culture and add to the aeration tank.
They will eventually mutate and grow in size but you will need to replenish them with the same culture at regular intervals. Try Sudershan Chemicals of PUNE for bacterial culture.
Regards,
Taral Kumar
Executive Director
Akar Impex Pvt. Ltd.
Noida, Uttar Pradesh

4)
• Cow dung is the starter for development of MLSS in aeration tank. 
• Take fresh cow dung. 
• Remove the grasses or any other foreign material.
• Prepare slurry in the separate tank.
• Add cow dung into aeration tank filled with effluent.
• Quantity of cow dung is around 3kg/m3 (as such basis).
• Keep the aeration on for 24 hr.
• Add urea & DAP to support the growth.
• Slowly take effluent intro aeration tank after 4 to 5 days.
If you need any further information then please free to contact us.
With regards,
Prof. R. V Saraf



2 comments:

kristina young said...

Thanks for spending your valuable time in delivering the most valuable content here.I loved the way you write and suggest my friends too for getting aware of your blogs.
Pawn Shops
Pawn Brokers
Pawn Loans
Pawn Loans in Alabama
Pawn Shops near me

monika sharma said...

Great post Thanks for sharing

Read more