Wastewater Treatment method for Dental Floss Manufacturing Site

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Is there a special method for  treating wastewater from the dental floss manufacturing site? We are experiencing high fluctuation in BOD in the wastewater generated at our manufacturing site.

Please tell me the best water treatment method when biochemical oxygen demand (BOD) fluctuates from 1,000 ppm to 10,000 ppm?
The amount of wastewater generated per day is just 600 l.  

Other parameter fluctuations we observed were: 

Thanks!

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20 Answers

  1. If it is only 600 litre you can start with a very simple Build It Your Own Sequencing Batch Reactor. (SBR). Just a small tank and pump air in it. Sludge will grow spontaneously or you can start with some seed sludge. After let's say 4 - 8 hours of air injection you can let the sludge sink and settle. Once the top layer is free from solid particles you can remove the upper 25 - 30 % of your tank This is the cleaned effluent and start the process again. This rotation can be automated with some time switches. Additionally you can add a dissolved oxygen meter. Once the oxygen level is steeply rising, the bacteria don't need oxygen because all the organic matter is consumed. At this time you can stop the air injection and start the settling phase. 

     

  2. If it is only 600 litre you can start with a very simple Build It Your Own Sequencing Batch Reactor. (SBR). Just a small tank and pump air in it. Sludge will grow spontaneously or you can start with some seed sludge. After let's say 4 - 8 hours of air injection you can let the sludge sink and settle. Once the top layer is free from solid particles you can remove the upper 25 - 30 % of your tank This is the cleaned effluent and start the process again. This rotation can be automated with some time switches. Additionally you can add a dissolved oxygen meter. Once the oxygen level is steeply rising, the bacteria don't need oxygen because all the organic matter is consumed. At this tiome you can stop the air injection and start the setteling fase. 

  4. Dear Dr.Manivannan,

    Just visit our website www.actizyme  for more information about this enzyme taking care of BOD levels in  environmental friendly way. Its very economically in use and easy to apply....please contact us for free consultancy work as we are present in India.

    Thanks

    Theo

    t.huitema.haiti@gmail.com

    1 Comment

    1. Theodorus Huitema please provide some information here about how it works and why a good solution to the benefit of all and knowledge sharing beyond pure marketing. All will appreciate this. Thank you

  5. If you can figure out a way to separate the Oil and Grease from the water, then you could use Solar Distillation Panels to recycle and purify your water, with ZERO LIQUID DISCHARGE/NO REJECT whatsoever, (I've attached some photos).

    These panels have been used all over the globe to filter and recycle all kinds of water, effluent, even Frac Water, however, they can NOT deal with water that has Oil, Grease or ANY kind of Petrol/Petroleum products in them, because it clogs up the panels.

     

    Each panel costs about $700 USD, however, they use ONLY Solar Power and ZERO grid connected energy, they have a lifetime of about 25 years (same as Solar Panels), they are "GREEN" and have ZERO Carbon Footprint.

    I hope this helps. Have a Fantastic Day.

     

    Respectfully, Parke Blair

    Chairman, GeoSource Foundation

    Malibu, CA

  6. I tend to agree with some of the others who have suggested equalization and better data collection.   Equalization will balance out the fluctuations as they may exist.  The BOD/COD ratios referenced just don't make sense.  What time period were the data collected over?  Are they correlated to any changes in manufacturing process?

    That said, there should be nothing specific about dental floss manufacturing wastewater that makes it exceptional.  

  7. Up to 10 000 ppm = 10 g/l BOD at max. 2200 ppm COD is just not possible.

    If the max. 2200 ppm COD would be correct, then the BOD would be less than 1500 ppm.

    Correct validated data is essential to solve any problem.

  8. Dear Krishnan Sir,

    A calm zone, followed by a Flash Aeration, An Anaerobic System and an Extended Aeration. This process will give you a complete, continuous output which can handle these types of fluctuations in the systemic characteristics. The design can be in simple FRP Tanks / syntex tax. It is cost economic, one time investment. Costing may go to hardly 10000 for tanks, 40000 for jet mixers.

    Anaerobic phase can be a CSTR. So an existing pump can be rerouted to use in Anaerobic phase.

  9. Dear Mr. Manivannan,

    The problem is not that complecated and you also need not increase your footprint. We can modify your existing sytems with existing capacity to completely treat your effluent if you are located in India.                                            

    We offer our XERODROP - non conventional - non biological system  for your effluent which can treat your 600 L in just few hours without any big tech jargons!

    Please write us directly on info@aeolusbioenergy.com or aeolus.bioenergy@gmail.com

    1 Comment

    1. Niraj Mithani please ​provide some ​information ​here about how ​it works and ​why your product is a good ​solution. This then shares knowledge ​beyond ​pure marketing. ​All will ​appreciate this.​ Thank ​you

  10. Your high COD values are probably related to the O&G and TSS concentrations. You might want to try a small DAF unit to remove most of both parameters and reduce your peak loads considerably. Storing wastewater is not a good option because if you want to treat with aeration and activated sludge, you need to feed the biomass regularly (preferably daily), so a small SBR would do the job.

  12. Considering very low flow, you may consider properly designed equalization facility prior to any treatment

  13. I agree with Dana Lee and Lokesh Pun.  For best control, averaging peak conditions over time is the solution.  Normally one day's retention is a good way of averaging production variations, because it will normally be repeated daily.  In your case the total flow is low, so the equalization tank is also small.  Therefore, if you have space, go for larger equalization.  If possible you could begin treatment by having air introduced into the EQ tank.  With the COD and BOD present, you could treat with aeration, then clarification.  You will need to remove sludge (floating or sinking, depending on the nature of your TSS.  What discharge effluent limits are you required to meet?

  14. What is the bod/cod ratio? With such high flucatuation in the influent i will suggest big enough equalization tank to homogenized the wastewater parameter

  16. The pre treatment is the best, before water discharged into the system network, then parameters will decrease. Again the capacity of the treatment works it will guide us, if it can treat the volume of wastewater discharged, other thing is the volume discharge per day. It will be 600l x 800ppm for COD. Then how much COD discharge per day into the system.  

  17. The pre treatment is the best, before water discharged into the system network, then parameters will decrease. Again the capacity of the treatment works it will guide us, if it can treat the volume of wastewater discharged, other thing is the volume discharge per day. It will be 600l x 800ppm for COD. Then how much COD discharge per day into the system.  

  18. The pre treatment is the best, before water discharged into the system network, then parameters will decrease. Again the capacity of the treatment works it will guide us, if it can treat the volume of wastewater discharged, other thing is the volume discharge per day. It will be 600l x 800ppm for COD. Then how much COD discharge per day into the system.  

  19. The pre treatment is the best, before water discharged into the system network, then parameters will decrease. Again the capacity of the treatment works it will guide us, if it can treat the volume of wastewater discharged, other thing is the volume discharge per day. It will be 600l x 800ppm for COD. Then how much COD discharge per day into the system.