What is the Best Approach for Yeast Factory Wastewater Treatment?

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We have 2000 m3/day of wastewater coming from instant yeast factory. 

COD 15000 and BOD 10000.

What is the best approach for wastewater treatment?

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16 Answers

  1. Dear Ali Farahmand,

    We have almost 35 years experience on treating this kind of high strength wastewater. The best (most sustainable = ecologic + economic) approach is definitely high rate anaerobic digestion (HRAD) after full equalisation and removing most of the suspended solids (TSS). With our HRAD we convert up to 95% of the soluble COD and BOD to methane rich biogas. In this way, a lot of green energy is produced instead of wasting a huge amount of electrical power by aerobic treatment.

    If interested, I can send you more information via email.

    Regards, Bruno

  2. It has biomass which can be removed by sedimentation with coagulating agent or DAF. Sedimentation will remove considerable amount of BOD. It can be further subjected with two stage biological process it means Anaerobic (Fixed media up-flow anaerobic bioreactor) & Aerobic (Activated Sludge process)

    Rajendrakumar V Saraf

    sarafrv@virajenvirozing.com

  3. Dear  Ali Farahmand,

     

    There are many ways to treat it including extensive and intensive treatment.

    If you have enough area you can treat it in a sequence of lagoons (that can include from anaerobic to facultative, and others and wastewater returns).

     

    If you have no enough area, but you have highly skilled personal employees, you could use any anaerobic biological wastewater systems (UASB,  EGSB, CSTR, others or whatever modification or hybrid between them), and some aerobic system at the final to reduce more if it is needed. You will need local skilled personal )or even remote control in this case because the anaerobic treatments have delicate balances that need highly experence operators.

     

    Other suggestion is that you can use a simple aerated lagoons system enhanced by a biocleaner system that has a good performance and really simple operation and digest the sludge in the same lagoons.

     

    Whatever case it will be better that you install one or some pilot systems to confirm the performance or even to obtain data in a competition between them.

     

    Regards,

    Orlando D. Gutiérrez Coronado

  4. There may be a lot of cell matter, which, although biodegradable, may be removable using a DAF.  This may remove some BOD and allow pH correction.  As a microbiologist one of the first materials I used to grow bacteria on was yeast extract.  There may well be a high ammonia level, therefor a strictly aerobic system would be required.  Ammonia oxidiation is carried out by ammonia oxidising bacteria, which is a two stage process , which requires specific bacteria and may need biocarbonate added to the effluent as a source of carbon.  Anaerobic digestion of ammonia is not good nor will it remove any phosphate present.  The aerobic system will settle using a settlement tank and the water could be put for further treatment if re-cycling is required, but that will depend on the salt content of the water.  

  5. Dear Ali,

    Your water is highly concentrated in organic matter with a good biodegradability (BOD/COD ratio= 0,66) and probably with a temperature around 30° C.

    One UASB reactor with biogas recovery followed by aerobic reactor can solve your problem with a relatively low operational cost.

    You need to know pH, TSS, P, N  and the flow pattern of your wastewater (is  yeast batch production?) to decide for pre-treatment and your discharge limits for final treatment.

    One well dimensioned UASB can reach COD 500-1000 mg/l in the outlet and the following aerobic reactor can reach less than 150 mg/l COD.

     

     

  6. ADI Systems out of Canada has installs on yeast applications. 

  7. I believe the first step is analizing the water.  There are many variables and to receive the correct system that will fall in line with your production and layout. Then find the appropriate solution to suit the analisis.

  10. French English

    Bonjour La meilleure approche de traitement des eaux usées est l'épuration. la meilleure approche de traitement d'épuration des eaux usées est le processus biologique qui utilise l'action de la biodégradation. Pour ce faire il aut que l'effluent d'eaux usées soit totalement à caractéristique biologique. Une trop forte concentration d'une pollution même à caractéristique  biologique  entrainera un dysfonctionnement biologique. 

    Dans votre problème si vous voulez utiliser un système biologique, il faut d'une part, diluer cette pollution et d'autre part l'ajouter à une pollution plus pure biologiquement parlant qui compensera la caractéristique biologique déficitaire de votre effluent 

    Hello The best approach to wastewater treatment is purification. the best approach to wastewater treatment is the biological process that uses the action of biodegradation. To do this, the sewage effluent must have a biological characteristic. Too high a concentration of a pollution even with a biological characteristic will cause a biological dysfunction.

    In your problem, if you want to use a biological system, it is necessary, on the one hand, to dilute this pollution and, on the other hand, to add it to a biologically more pure pollution which will compensate for the deficit biological characteristic of your effluent.

  11. We have a first-hand experience of treating yeast manufacturing water, but in our case, the COD is around 60000 and BOD 40000. We are using two-stage UASB with  COD removal efficiency of around 80-90% followed by Lamella( Sludge generation is as high as 30-40%), Followed by activated sludge process. We get  COD of around 5000 or lower, which is than passed through NANO Filtration, Reverse Osmosis, SWRO and Multi Effect evaporator. 

  12.  

    For reduction of BOD/COD/TSS and reuse waste water can use the below method

    The primary system: i. physical treatment,ii. chemical treatment

    The secondary system: i. Biological treatment ,ii.Chemical  treatment ,iii.Membrane  method,iiii.electrolytic method

  14. Dear Ali Farahmand

    Good question

    The most important source of raw material in the yeast industry is a by-product of the sugar industry; molasses. Molasses, in the dry matter, contains 60% fermentable sugar and 40% non-sugar containing substances that cannot essentially be used by yeast.

    Substances that cannot be used by the yeast remain in the wastewater and can cause serious pollution to the environment if they are passed into nature without any further treatment. Very high COD concentration values ​​between 15,000 and 50,000 mg/l COD are indicative.

    The ACS EGSB reactor, coupled with existing technologies such as flotation and sedimentation, can be used successfully for this application. With its patented technology, the ACS EGSB reactor reduces the COD load by 85-90%. The BOD5 concentrations can also further be reduced by approximately 90%.

     

    http://article.sciencepublishinggroup.com/html/10.11648.j.ijema.20160405.13.html

  16. While the most appropriate answer generally relates to discharge requirements, micro-screening is the ideal first stage for dramatic TSS/BOD/COD recovery. Kindly visit http://www.baleen.com/images/pdfs/Baleen%201-4%20Step%20Method%20AWMR%20Article.pdf and refer attached.

    1 Comment

    1. Dear Ali

      For reduction of BOD/COD/TSS and reuse waste water can use the below method

      The primary system: i. physical treatment,ii. chemical treatment

      The secondary system: i. Biological treatment ,ii.Chemical  treatment ,iii.Membrane  method,iiii.electrolytic method