PROBLEM SOLVING:
Source of the anser : https://www.researchgate.net/post/Why_is_water_is_becoming_dark_black_in_an_aeration_tank_in_a_wastewater_treatment_plant
Source of the anser : https://www.researchgate.net/post/Why_is_water_is_becoming_dark_black_in_an_aeration_tank_in_a_wastewater_treatment_plant
Why is water is becoming dark black in an aeration tank in a wastewater treatment plant?
I've worked on a wastewater treatment plant at a catering service last week. Their wastewater treatment process as follows,
1. Screening
2. Grit chamber
3. Oil trap
4. Areation
5. Settling Tank
6. sand Filter, etc.
They are facing a problem as the wastewater getting black color after aeration and the sludge is not settling in the settling tank thereafter. Also, their is a huge odor occurred in the aeration tank now.
What will be the reason for this and what will be the solution?
ANSWER:
It means you have incresed the organic load to your aeration tank as a result there is a shortage of oxygen in the aeration tant .This can be checked by measuring DO in the aeration tank & should be about 1.5 to 2 mg/l.
A) Please check for malfunctioning of Aeration system fouled membranes etc
B) You can improve the situation by cutting down load to the aeration tank by reducing the flow or the inlet BOD concntration or by adding more air to th aeration tank.
C) Ensure that you are not dumping some chemical like food preservative,detergent, oil or off spec product in the waste water system as this can increase the ETP load.
It will take about 4 to 8 hours to restore, if you balnce the BOD load and the oxygen supply ( 1.5 Kg O2/Kg BOD loading) subject to you have not spolied the biomass otherwise it may take 2 to 3 days to bring the normalcy.
If you need more correct solution you may have to share design and operation details
Note : The black colour is due to shortage of oxygen ( less oxygen/more organic load) and will vanish once you restore the balance.Normally the healthy biomass should be brownish in colour and smell like moist soil.
4 comments:
This is really a good blog. I have one question. From where can we procure EM stock solution.
Thanks
Hello,
Go to google search and enter Consolidated Agritech Co; . You will get all information on EM.
Nandan
call me, for EM or AEM on 9903994404,
jitendra singh, kolkata
Thanks for sharing with us.LOCUS WATER SOLUTIONS (P) Ltd PROVIDES MANUFACTURERS&SUPPLIERS OF Effluent and sewage Treatment plants.
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