Waste water treatment plant

Published on by in Technology

Filamentous bacteria present in MY Secondary treatment how to control on them please help me to solve these problems I am having SBR technology in waste water treatment plant  

Taxonomy

8 Answers

  1. Hi Samiya,
    In addition to the above comments and suggestions, which are very good, sometimes it is not easy to solve the algae problem. If this could be your case I recommend a possible solution that we know of. This is the use of algae control devices that emit ultrasonic waves to control the most common types of algae, including filamentous algae.
    These systems control the filamentous algae in suspension without using chemicals and without killing the beneficial bacteria in the different stages of treatment in the wastewater treatment plant and also help to reduce the levels of TSS, BOD, COD and pH, facilitating the correct discharge of wastewater.

  2. First off, not disregarding previous comments/suggestions, you must identify the filaments. You cannot address the problem if you do not know the root cause. There are services available to assist in the identification, as it can sometimes be a tricky endeavor if you do not have experience in filament identification. I do not know where you are located, but some US based services are: https://teamaquafix.com/product-category/lab-services/; https://teamaquafix.com/common-wastewater-filaments/

    https://mco-us.com/wastewater-microbiology/

    Also, maybe a local university has this capability to assist you. I wish you success.

  3. Hi Samiya,

    I wish this would be helpful, Inform us about the result:

    The best way to control filamentous bacteria in the secondary stage of a SBR wastewater treatment plant is to monitor and adjust the sludge age and solids retention time (SRT) while maintaining a low dissolved oxygen concentration. Adjusting the SRT is important as it will improve settling performance, reduce filamentous bacteria development, and help maintain an aerobic environment with adequate contact time for biodegradation. Other strategies may include addition of chlorinating agents like chlorine or hypochlorite solution, alkalinity manipulations, inoculation with granular activated carbon, or external air sparging.

  4. Check what is coming into the reactor. are you doing any primary treatment? any oil or organic acids in influent? Try adding not more than 100ppm of ferrous sulfate in the biotank for a few days.

     

  5. Hi Samiya, I am not going to repeat what to other already said but two things I wanted to add: when they appear you should avoid remixing of flotated scum in the activated sludge and instal selectors. And then you should also investigate to monitoring of the appearing of them to try to act as fast as as possible on the cause and addapt the RAS etc.  Where is your plant located? 

  6. Hi Samiya, as Dmitri has suggested, filamentous growth is often a result of incorrect F/M ration (food to micro-organism ratio). I am attaching a document from Canada which may give some options on what you can do on your plant.  See especially pages 12-32 to 12-36.

  7. The most efficient way to keep from having extended sludge age.  Once you have the problem, it is customary to feed bleach to the RAS.  This will kill the filamentous and they will become food back into your system.  When filamentous show, that is usually the sign of an aged sludge. You will typically also have bulking at the same time.  Hope this helps.