Wastewater Treatment in Meat Industry

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What is the best cheapest method for fat wastewater treatment in meat industry?

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28 Answers

  3. Dear Muna Hindiyeh,

    For each enterprise of the meat industry there should be an individual and integrated approach to the selection of the technology for cleaning heavily contaminated sewage. But the main technology is physicochemical treatment with the use of pressure flotation. The possible purification efficiency may be up to 90-98% (depending on the content of contaminations).

  4. Bioaugmentation is a very green, sustainable, and cost effective method that uses Bacillus bacteria to breakdown FOGs into carbon dioxide and water.  This form of treatment is available at a fraction of the cost of mechanical treatment systems.  They can be very effective in simple treatment lagoons or in more complicated wastewater treatment systems.  Please check out our website for more information or feel free to ask any questions directly.

    Rob Majka, Microbial Discovery Group

    Website:  www.mdgbio.com

    Email:  rob.majka@mdgbio.com

  6. DAF plus lagoon would be cheap in capital and operation. But requier large footprint.

    Answered on by

  7. In general, a DAF (Dissolved Air Flotation is a good first step to remove the fats.  Depending on the incoming concentration, even a 2-stage DAF system could be used.  (Effluent from the 1st DAF feeds a 2nd DAF).  The fats from this process can be a revenue stream, as they have uses in other applications.  After that, it's a little less clear.  Are you direct discharging or going to a municipality, etc.  In general, the smaller the system, the more economical will be aerobic systems.  The larger the system, anaerobic starts to become competitive and has the advantages of lower odor and potential to produce methane which can be burned in a gas boiler, if you have one.

  8. Dear Muna,

    if you have enough space, consider the possibility to use constructed wetlands. The are very cheap in O&M costs, and they have shown high removal efficiencies for typical pollutants (e.g. 77-98% BOD; 65-98% COD) as shown in Vymazal (2014).

     

    Reference:

    Vymazal, J. (2014). Constructed wetlands for treatment of industrial wastewaters: a review. Ecological Engineering , 73, 724-751.

    2 Comments

    2. Without a DAF, the wetlands will block and become anaerobic, which will at best inhibit the reeds and at worst could kill them.  Even then it will depend on the BOD coming from the DAF, because they may still fail without further BOD strength reduction.

      Commented on by


  10. Dear Ms. Hindiyed.

    If space is ​​not a problem, ​​depending: ​ ​

    1) on the ​​regulations to ​​comply with; ​ ​

    2) the ​​daily ​​wastewater flow ​​generated; ​ ​

    phytobiodepuration​​​ ​could be a ​​really cheap ​​option ​​considering ​​CAPEX and OPEX. ​​

    Phytobiodepuration​​​ ​is a ​range of ​waste ​water ​​treatments ​​that it ​​hasn't been ​​widely adopted ​​because it is ​​too cheap, and ​​also because ​​some companies ​​haven't ​​done a good ​​work in certain ​​facilities. ​Those companies ​just ​​looking for the ​economic result ​in a short ​​term, provided ​by public funds,​ and not taking ​care of the ​performance of ​the facility, ​they have ​​cast a great ​shadow ​over ​that kind ​​of ​​technologies.​​  ​ ​

  11. It will depend on where the water is being discharged to.  However, almost without exception, the first stage will be a balance tank to help even flows, and dilute any pH effects involved in cleaning.  If the process is poultry, then the first stage should be screening to remove feathers and then flowing to the balance tank.  From the balance tank, the water should be sent to a DAF plant.  There are two choices.  Either the water should be put into mixing chambers with stirrers to correct the pH, to dose coagulant and then polymer, or a series of pipes doubling back on themselves producing turbulent flow where the pH can be corrected, the coagulant dosed and the final polymer dosed.  This all occurs before the DAF plant.  The DAF needs to be sized for a constant flow.  With the correct pH, the correct coagulant and polymer, fats and small solids are separated using air and a scraper and beach system.  The fats removed can be rendered providing the coagulants and polymers are chosen correctly.  There will be significant BOD/COD levels flowing from the DAF plant including ammonia levels.  If there is a municipal treatment works, which will accept these then well and good.  If not further treatment will be required.  In that case the lowest cost is some form of aeration preferably fine-bubble aeration with good mixing.  Ideally a small anoxic zone where returned sludge is mixed with fresh liquor before going to the aeration tank where aerobic digestion occurs.  The mixed liquors are sent to a settlement tank big enough to separate the sludge from the clear water.  With the correct design, this water can be good enough to discharge into a water course.  As a more expensive option, a membrane system can be used instead of a settlement tank.  This is more costly to run and cleaning is required of the membranes, also there is a cost attached to membrane replacement.  The alternative to aeration, is the use of anaerobic digestion.  This is more complex and you may still have levels of phosphate and ammonia to dispose of, but the end product is methane, which can be used to produce heat or steam for the plant.  Even this isn't that simple and although it looks good on paper, a number of smaller AD plants have been removed due to the difficulties running them.

    Answered on by

  12. Hi Muna, first you have to consider CAPEX and OPEX ... What you may be offered as a solution will probably vary a lot.
    Daily flow, grease content and potential contact time are the main issues to deal with, to comply with regulations and/or the design of your sewage piping. We have a plug and play scalable simple solution that can be used for either small businesses up to large agroindustrial plants. It is patented and based on grease emulsification and then bacterial treatment, with state of the art strains including high cfu. No civil works needed , no moving parts in the effluent, CAPEX and OPEX are minimal. If you want to know more, just e-mail me : pdedenys@gmail.com

  14. The lowest cost method is to remove most fats and insoluble fatty acids prior to biological treatment. You can use dissolved air floatation (DAF), induced air floatation, or even some type of grease skimming device. While the treatment equipment is more expensive than a lagoon treatment system, it is saves money in the long run as the grease can be sold for biodiesel and other applications. In a biological treatment system grease can be treated, but it should always be at concentrations less than 200 mg/L for most system designs.

  15. . we have been treating this type of waste water for many years with a 100% organic bio-degradable solution - SOLUTEK.  After 3 to 5 days of use there will be no malodour, the floors and walls will become cleaner and after some weeks will look like new. Solutek is very easy to use and inexpensive. Fats, Oils and Grease are totally removed. We have testimonials to show and actual case studies. www.soleco-technology.com

    Stay safe,Hugh.

  16. Muna, You need to do a full wastewater analysis, compare that to the discharge limits, do a feasibility study for number of approaches, do a financial analysis and then that would give you the best option. 

  17. Dear Ms Muna,   there is a chicken slaughterhouse in Honduras.  Cadeca.  the grease from the grease trap that can be retrieved and send to the rendering plant for pet food.  but the rest of  the FOG, sludge, cod, bod, ammonia are treated with Biosix Biocleaners.    there is zero odor.  

    Since there is no sludge wasting, it saves a lot of money.  The contractor is providing all the equipment and doing all the service at a tiny fraction of their old cost.  

    Biocleaners are floating bioreactors that require no seeding of microbes and it will continue to generate probiotics  for over 20 years.  the probiotics will chew up FOG, sludge, Cod, ammonia and BOD and with enough hrt, lower coliform without UV or chlorination.  

  18. Using RNA microbes  will biodegrade all organic substances into their elemental state. The waste by product can then be used as a fertilizer.  Zero pathogens, Zero particles, and total oxygen availability is increased. If you consider the bones to be part of this meat processing then they would need to be filtered out. Bones are already in their elemental state of calcium. Grind and use on low calcium soils.  No chlorine, separating, or special devices.  Ultra low cost.

  19. Muna, If I understand "meat industry" as slaughter house operations :

    A complete treatment would include: 1.Segregation of solids (meat chunks and fats at origin) + 2.fine screening of plant combined sewer + 3.DAF + 4.Anaerobic D + 5.Aerobic treatment MBR + 6.Disinfection prior to discharge to "nature".

    BUT depending on the characteristics of the wastewater, if discharge is to be into a municipal sewer, most probably you can run with 3 + 4  alone (All depends on municipal regulations).

     

    1 Comment

  20. The ADsorb-it Fabric Products effectively remove Fats Oils and Greases (FOG) from wastewater.  www.eco-tec-inc.com herb(at)eco-tec-inc.com.

  22. Dissolved Air flotation is the best method for waste water treatment which have fat and meat content...

    but it is very important to know what is the quality of influent, and what is the quality of effluent targeted.

  23. It deponds on the quality of influent and discharge standard or if the effluent will be reused. Generally, for this kind of wastewater, the airflotation for grease removal and the anaerobic digestion(AD) for organic substance removal are widely used. The detailed techncial proposal should be based on a fesibility study. 

  24. The best method is the one that is effective !!!
    It all depends on what you need to clean and to what parameters !?

  25. Muna

    I recall a university professor saying the important thing in life is to know the difference between a salesman's opinion and a consultant's evidence based advise.

    There will be many salesman who offer their opinion of the best treatment plant, but the only way to answer your question is to obtain a project specific feasibility study as there will surely be many cost and performance variables that are specific and unique to the project.

    For example, the optimum bacteria will not only relate to the process plant size but also operating temperature, one process could favour anearobic bacteria, whilst another will favour aerobic bugs or even worms.  Local civil and environment regulations will also impact on the consultants advise.

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  28. Grease Trap is the cheapest one. You need to add some bacteria or enzyme for digestion.