Tannery Wastewater Treatment Plant

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We need to ​implement a ​compact waste ​water treatment ​plant for a ​tannery. ​

It needs to ​have low CAPEX ​and OPEX and ​the treated ​effluent should ​meet the ​standards of ​pretreated ​sewage to be ​discharged into ​the municipal ​sewage network.​  ​

How do I ​remove chrome ​and other ​residues of the ​industrial ​process of ​tanneries? ​

I will ​appreciate any ​information and ​experiences ​with ​designing such ​a plant and ​treatment ​technologies.​  ​

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30 Answers

  4. The pollutants of Tannery to treat and dispose is BCS and Lime! Stop using these.... the hazardous waste does not exist... Hence treatment becomes much easier!

    EcoTan Process (TANNERY TREATMENT) : The virulence of the Tannery Effluents can be substantially reduced (by nearly 70%) by simply replacing Basic Chrome Sulphate (BCS) with ECOTAN, a proprietary organic reagent developed by us, which has been tested and approved by the Central Leather Research Institute (CLRI), Chennai (Patent applied). 

     

    Powder Lime or Calcium oxide used in the liming process leaves behind a sludge that is hard to dispose off. The high degree of sludge produced in Tanneries can be substantially reduced by replacing the Powder Lime used in the process with ECOLIME, a sludge-free, eco-friendly liquid substitute, also developed by us. Patent has been applied for.  

     

    The resultant, relatively benign tannery effluents can be further purified in Effluent Treatment Plants (ETP's) and treated with small doses of ECOCLEAN-20 and ‎ECOCLEAN-50, which will neutralize most of the other salts and toxins in the effluent water. This treated water can then be safely discharged or reused for General Purpose.

     

    Link:  http://www.ecohealth.in/ecotanning.html

  6. Dear Jose Luis,

    We have innovated a novel process called the LeachBuster® for treatment and remediation of Tannery Wastewater without the need for biological, chemical, electrical or other multistage processes.

    The LeachBuster® system can assist you in addressing your current and future issues with the disposal of tannery wastewater directly at your site in a very timely manner (in weeks rather than months or years). Some of our client list include leading companies like: JBS USA, Tyson Foods, Cargill and Twin City Tanning (TCT).

    Please review the following and let us know if you wish to evaluate the applicability of this technology to your tannery plant. We normally request liquid sample (approx. 50 gallons) sent to our lab where we can treat it with our LeachBuster® system and return the treated sample for your evaluation and analysis through a third-party lab.

    Here are some of the features of the LeachBuster® system for your review:

    1) The process is a single stage filtration system which can accept any wastewater with varying levels of contamination (Chemical Oxygen Demand, COD of 1000 to 120,000 mg/l) and produce effluent with varying levels (COD

  10. Bonjour

    D'un point de vue d'une épuration -biologique- c'est plus difficile car la concentration des résidus de la Tennery est importante. il faudrait pour ce faire que ces eaux usées soient ajoutées à d'autres eaux usées -biologique-

    C'est ce qui se passe dans l'habitat: toutes les eaux usées sont regroupées sur le site d'épuration biologique. Les moins chargées en organie celles qui ont le moins de présence bactérienne, sont mélangées à celles des excréments. le procédé "Fosse Biologique"lyseconcept dissout toute la pollution dans un volume conséquent  

    Hello

    From a point of view of a biological - treatment - it is more difficult because the residues of the Tennery is important. It would take to do this that waste water be added to any other waste water - biological-

    This is what is happening in the habitat: all wastewater are grouped together on the site of biological treatment. The less loaded in organie those who least of bacterial presence, are mixed with feces. the process "Fosse Biologique"lyseconcept dissolves any pollution in a volume  

  12. Chrome tanning is the most popular tanning system in leather industry and the quality of leather is excellently prepared by this method. The tanning process produces leather from the skin and it offers excellent hydrothermal stability, better dyeing characteristics, and softness to the leather.Chromium pollution is a serious issue because of carcinogenic toxicities of the pollutants and low recovery rate of chromium because of the presence of organic, such as protein and fat is commonly found in huge quantities in tannery waste waters. For this reason, the removal and recovery of the chromium content of tannery waste waters is crucial for environmental protection and economic reasons. Removal and recovery of chromium carried out by using low-cost potential adsorbents. For this purpose three types of activated carbon; C1, the waste generated from sugar industry as waste products and the others (C2, C3) are commercial granular activated carbon is used. The adsorption process and extent of adsorption are dependent on the physical and chemical characteristics of the adsorbent, adsorbate and experimental condition. The effect of pH, particle size and different adsorbent on the adsorption are also effected.

     

    https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=0ahUKEwi6mY-l66PTAhVEKo8KHQU9AQcQFghRMBI&url=https%3A%2F%2Fwww.hindawi.com%2Fjournals%2Fjchem%2F2016%2F8298090%2F&usg=AFQjCNFiQuMizYggyCmjK0yYfhquxg9dOA&sig2=LfDmZnigCXWA8J7eg5sI1Q

  13. Hola:
    Puede consultar este artículo que ha publicado nuestro equipo:
    Tratamiento con ozono de agua residual con taninos de curtiduría al vegetal
    Natividad Ramírez-Ramírez, María del Carmen Espinosa-Lloréns, Lidia Asela Fernández-García, Eliet Véliz-Lorenzo, Yalexmi Ramos-Rodríguez
    Tecnología y Ciencias del Agua, 2016 VII(3)

  14. We are in possession of a highly reliable, efficient, economical and environment-friendly, patented state of the art Canadian technology for treatment of water. Please see file attached. Regards. Anil Attavar, Director Way 2 India (Canada). Telephone:=91-9818736571

  15. Chromium and other heavy metals are usually being precipitated by pH adjustment (addition of lime).

  16. Low CapEx/OpEx is a relative term that means little. Heavy metals can be removed in a number of ways. There are other species of importance as well. What is location and local code requirements if any over federal regulations. What is pH, BOD, etc. I work in water and wastewater consulting and have a few ways but would need more concrete parameters to work from.  What is the volume of waste is also a big factor in cost. There are definite ways of cleaning up anything. I just discussed a new process a guy in Canada is marketing that literally turns geothermal brine with oils into rain water quality. Just a matter of matching the dots. Like to help further but need more information. 

  18. Dear Jose,

    please have a look at xflow.pentair.com about our possibilities and experience in MBR systems. Feel free to conact our service team via the website for further information.

    Thanks Jens

    1 Comment

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  20. Dear Jose, We are able to with low CAPEX & OPEX and operating cost as well. more than 200 small turnkey project we experienced in Korea Pig skin, Cow skin tannery WWTP. Can you send me more detail (Capacity, production process, target BOD/COD and Budget etc) to antoniokim65@gmail.com? Thanks and regards, Hot line phone: +82.10.5231.8920

  23. I have done some work with tanneries and have found that an effective way to treat these difficult waste waters is with a series of solid/liquid separation steps and then electrocoagulation and separation again. This deals with your harmful Chrome elements and generally brings the discharge within specification. 

  25. Tanneries and several textile finishing sites  have quite high water consumption and use primarly non or slowly degradable agents and auxiliaries. Tanneries use also toxic Sulfides, making Things more complicated. Chromium can be today replaced by less harmful tanning agents. Biotreatment has the lowest costs, but can´t achieve a complete treatment, so that oxidation methods are necessary for a better removal. 

  26. Hello Jose,

    Thank you for proposing this question to the group.  Is this for an existing facility or a new facility?   We have experience with working with two North American Cattle Tanneries  and One Tannery in India.     As part of your process are you chemically burning the hair off  the hide or are you scrapping the hair first then using chemistry to finish the process?  

    The faculties that we have worked with have suggested removing the solids first then treat for the Chrome. (Coarse Screening 1" followed by fine screening 200 micron).  This process will remove the hide hair and tallow.  Case study attached.

    If you would like to discuss  greater details please email me at

    mbokenkroger@hydro-int.com

     

    Thank you,

    Matt Bokenkroger

  28. Chromium can be removed through innovative ion exchange adsorption technology using natural adsorbents such as low cost vermiculite through fixed bed filtration.

    1 Comment

    1. Carlos, is adsorption really applicable to pre-treatment for sewer disposal? What is the adsorption capacity per kg of adsorbant, and how would it cope with the other contaminants and solids in the effluent? Ion exchange and adsorption is normally used only for final polishing of effluent once most of the contamination has been removed by other, cheaper methods.

  29. At first should you deliberate over a question – will you recycle the chrome and tanning agents from your waste water and use these again for the tanning process or will you only pre-treat your waste water so that you can discharge it to the municipal sewage network. The recycling of chrome and other tanning agents can help you to minimize the costs of the waste water treatment. If you´ll have some information to the technologies what you can use for the recycling process please don´t hesitate to contact me direct.

    1 Comment

    1. Gunther,

      You are quite right - the first step is to look at options to eliminate or reduce the discharge of chromium by using alternative tanning agents (which may not be possible) and by recycling or reducing wastage within the tannery. THEN look at treating the effluent. 

  30. The best approach is generally chemical coagulation and then filtration. If there are significant settleable solids in the effluent, you should include a gravity settlement stage first to reduce the load on the filters. For further information see  http://www.sciencedirect.com/science/article/pii/S2212371713000085 

    Depending upon the coagulation characteristics of the effluent, and on the chromium limit for the receiving sewer, you should design the filtration process to ensure that limits are met reliably. Coarse sand filters are cheapest but will require better coagulation to create large flocs. If you need a fine filter, I can assist you with a design for our patented FilterClear system, which has been used successfully to remove metals from industrial effluents.