What is the best option available to recycle the treated wastewater of a textile mills ?

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Dear friend, what is the best option available to recycle the treated wastewater of a textile mills?

Output of wastewater treatment plant have characteristics (Feed to Recycling Unit)

BOD 50mg/l, COD 110 mg/l, TSS 50 mg/l, TDS 2,500 mg/l, Total Hardness 450 mg/l, Chloride 585 mg/l, Sulphate 151 mg/l,

Required Output after Recycling Unit is of TDS 800 mg/l.

Which Scheme is the most suitable one (in sense of economics and better output)

Your valuable feed back will assist in deciding the right solution, thank you.

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22 Answers

  1. Dear All, I appreciate all of your responses. I would comment on one of the solutions recommended as to Gasify the waste-water. The issue with this solution is when we go with the industrial wastewater, there are much considerations with the chemical composition of the wastewater either it has surfactants, any other chemical which could disturb the vacuum evaporation vessel etc.. To your exclamation for a simple clean RO Reject Water to be evaporated RO Reject Water having TDS 35,000 - 40,000 ppm Feed to Evaporation System Quantity will be 20 m3/hr Anyone can guess how much Commercial Offer I got for this clean water evaporation system? It was US$ 15.5 Millions Ex. Works USA. Would appreciate to know any of you which Industry in Developing Countries would afford such solution? Even I feel in Developed Countries this is a huge investment. So now you can imagine if we go for a solution for Industrial wastewater evaporation, how much would be the offer could be. Apart from the above comments, just for your information, for the Textile Wastewater output, I am going to try a pilot plant PSF+NF to see the outcomes and would share with you the results as well. Thank you, Best regards, Mansoor Ahmed

  2. I might have a solution that you might want to consider. I represent a client who has just designed, developed, produced, tested, & patented a novel MED unit that can be powered 100% by solar power during the day and then convert over to natural gas or any other fossil fuel at night. Initial documented test by the University of Tennessee Tech as well as the University of Louisiana here in the US showed a test water sample that measured a TS of 217,247 mg/l that was cleaned down to 12 mg/L in a single pass through my clients invention. If you would like to learn more feel free to contact me directly at jtechau@tricorllc.com All the best! Jason Techau 01 816-524-3509 Skype ID: jason.techau (Lees Summit MO)

  3. You really need to be careful. The simple answer is UF/RO and mixing the resulting stream with water that has only had UF to give the TDS you need. You do not need to RO all of it. However, you need to characterize your feed better. There is a large percentage of the TDS you have not identified. If that is Ca, Mg, Si, etc as hardness and that is at a high level in your recycle at specific periods, your dyer is not going to be happy with you. Also, that UF fraction in many countries (USA, India) may need to be treated as hazardous waste and you need to account for that cost. To remove the hardness, you need to look at NF instead of UF.

  4. Hello My friend.. wow! so many answers that you got! Just to let my opinion: Zeolites + Nano filtering may give you the balance betwenn cheap and good, But I really recommend you to pilot the system first. But another good factor will be that the process will need some (even a few amount) of fresh water... to complete the total amount needed in the process... this will hekp to low the TDS as well... Again, just my opinion. Regards! And good luck my friend! Léo.

  5. Dear Respected All, I am thankful to you all for your healthy participation and sharing your valued theoretical and practical expertise. Just to give some more on the present output quality, the treated wastewater is colorless and having very low TSS content (30 ppm) without passing though any Sand Filters. We have PSF also but at present we are not using it. If we pass through it, it will give extra polishing effect and we may get far more better quality. Now come to the explanation, we are not looking for very low TDS after having any of the membrane technologies, as our requirement will be fulfilled by just having a Product TDS 800 - 1000 ppm. This can easily be utilized in Dyeing and Printing Department. Above all, now after a good technical solution, it must be having low CAPEX and OPEX are always the main consideration when we talk from the point of the businessmen. So this is what for Engineers/Designers. Hope the things are clearer a bit.

  9. The Biological Cleansing (A.B) with its process “Pit Biological " lyseconcept is a revolution in the approach and the treatment of domestic waste waters. It does not use any filtering device, it does not produce residues of muds and the water of rejection at exit is used for immediate watering of the vegetable garden It is a total and final biological concept biotechnological economic ecological. Its performance épuratoire at exit of the processis of 90% complete by a vegetalized discharge system which suits him to purify the ground of diffuse pollution carrying the whole with a performance of purification to more than 98%. The concept is declined spous the form of project: - Individual cleansing of habitat - The CEBRE information system strategic plan of Biological Cleansing of urban area. It removes the sewage treatment plant and the infrastructure of the collecting system of the traditional collective cleansing. - The Revalorization PROJECT of Waste waters for a Productive Organic farming on farms in Africa Senegal Cameroon, Cote d'Ivoire, Burkina Faso Burundi Bénin Mali RCA Niger Mauritanie Congo Conakry Guinée DRC Sierra Léone Gabon Mayotte Inde Monténégro Kenya Ouganda etc - The Recycling project of water Banks food for an honorary reintegration in the work world - The Recycling project of water vegetalized Biodiversity Pushes back the flood and fights against the erosion of the grounds. If the recycling of its waste waters is a rejection in the environment, it is imperative that they do not contain any micro pollutant chemical. I think that it is already necessary to inventory of this with dimensions before any proposal because some is the treatment suggested these micro pollutant chemical will find themselves in drinking water and food.

  10. what is the best option available to recycle the treated wastewater of a textile mills ?

    A zeolite filter follow by RO ! because of the hardness ,if not remove before the RO , might scaled up the membrane and render the RO useless !
     

  12. Textile waste

    Dear Mansoor Ahmed ,

    The textile waste is easy to clean or gasify . A single unit on a trailer can sterilize up to 600,000liter a day . The water can be released to the ground or river . Alternative you use it again for your industrial process.

    Alternative , you can gasify the toxic liquid and use the Syngas for electrical use . For example 600,000liter of toxic liquid will provide you with around 19 million cubic feet of syngas . Enough Gas to fill up 19,000 Industrial size (2,000cubic feet) gas bottles for sale . Or provide energy . You can have a lot of Mw/h with this amount of gas . 

    The system cost $1,9 million for up to 200,000 liter/day . The bigger one for up to 600,000 to sterilize or gasify will cost $2,9 million . Both systems are mobile on a re trailer or stationary .

    The system works for sterilization & gasification by just turn the switch . 

     

    Hope my answer helped to answer your questions  .We have cleaning, water purification systems but with some waste, like textile , it is very maintain and cost efford to do it . The EAWC system is a complete different way compare to the traditional water cleaning. More simple and in my view more effective and useful . Special in high toxic waste !

     

    Best Regards,

     

    Ralph   

        

  13. My experience says that water recycle depends on the need to recycle - it could be due to water scarcity, water quality, both or as a part of the organizations CSR activity. The treatment scheme depends on these factors. So it is important to know the end use of this water, accordingly the suitable scheme can be designed. In textile plants, removal of the color from the dyes is important and very tricky for which primary clarification with carefully chosen polymers are required. this is followed by biological treatment followed by MBR and RO (if the water is needed for Cooling purposes or for boilers).

  14. Knowing the water quality and volume requirements of the process or processes in which you wish to use the recycled water will help determine the treatment scheme. More stringent requirements will take more treatment and vice versa. Then the economics can be considered.

  16. UF + RO (Partial)

    Dear sir,

     

    According to your quality needs, and taking into account that you already have a bioogical treatment plant running, you will need to use a UF to treat for suspended solids an ensure SDI

    UF treated water ould then be partially treated by RO, in order to reach 800 mg/L in TDS for the final blend. An initial approach for your mass balance is to treat between 40 and 50 % of the UF product. Standard recovery rate to be used here is around 70%.

    I hope you find this answer useful.

     

    Best regards

    S. Cotic

  17. Best solution

    I recommend UF followed by either Nano or RO, however I would add AOP prior to UF.  

    If you need a turnkey system we have them.

    Best regards,

    Otto Gruhn

    www.southwaterllc.com

     

  18. Prof. Dr. Hilmi S. Salem

    Dear Dr. Mansoor:   Regarding your question, please find the following studies provided in PDF form:   NRDC’s Ten Best Practices for Textile Mills to Save Money and Reduce Pollution  A PRACTICAL GUIDE www.nrdc.org/cleanbydesign FOR RESPONSIBLE SOURCING February 2010, By Authors: Linda Greer, Susan Egan Keane, Zixin Lin http://www.nrdc.org/international/cleanbydesign/files/rsifullguide.pdf   TEXTILE TECHNOLOGY Cotton Textile Processing: Waste Generation and Effluent Treatment B. Ramesh Babu*, A.K. Parande, S. Raghu, and T. Prem Kumar https://www.cotton.org/journal/2007-11/3/upload/jcs11-141.pdf   THE POTENTIAL FOR INDUSTRIAL WASTEWATER REUSE  www.worldwewant2015.org/file/303908/download/329870   Kind regards ---- Hilmi   Prof. Dr. Hilmi S. Salem Palestine (Occupied)

  19. The best option is UF plus RO. Extensive pre treatment is required to ensure membranes do not get fouled. UF shall ensure SDI less than 3. Take Fouling resistant membranes. You will get TDS much less than you want!! Try operating at lower flux (I would prefer appx 10 LMH)

  22. Wastewater textile enterprises are formed at all stages of production, but the most dangerous are the effluents generated in the dye shop. All waste water shall be in sewers . In terms of consumption of natural water and wastewater discharge is one of the leading places occupied by dyeing and finishing of textile manufacturing industry. Specific consumption of natural water and wastewater , respectively , in these industries is 70 - 400 m3 per tonne of production . Therefore become urgent task of developing technology that would return treated wastewater into production. Wastewater purification technology in production ( Figure 1 . ) . This technological scheme solves two main issues: - The structural organization of cleaning methods; - Organization recycles.This technological scheme solves two main issues: origin: http://www.membrane.msk.ru/books/?id_b=13&id_bp=408 Scheme can be seen there on the site