Sustainable Textile Challenges - Discuss & Debate

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Challenge category : Reducing water pollution in textile value chain

Challenge question : How can the conventional methods for wastewater treatment (physical and chemical) be made more sustainable?

December 2020

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Textile Wastewater Treatment — An Application To Sustainably Reuse Water In The Textile Industry

This article presents a new approach, which is an intersection of advanced primary and secondary water treatment solutions, to meet challenge of to meet the challenges faced by the textile industry.

Electrocoagulation is one of the emerging water treatment solutions capable of handling the varying wastewater characteristics of textile industry effluent. This advanced technology utilizes the advantages and functions of conventional flotation, coagulation, and electrochemistry in water and wastewater treatment to optimize contaminant removal in an environmentally sustainable and cost efficient way.Electrocoagulation is one of the emerging water treatment solutions capable of handling the varying wastewater characteristics of textile industry effluent. This advanced technology utilizes the advantages and functions of conventional flotation, coagulation, and electrochemistry in water and wastewater treatment to optimize contaminant removal in an environmentally sustainable and cost efficient way.

This specialized solution provides companies with new and existing wastewater treatment systems the opportunity to optimize their current treatment process, adding dependability, reducing operating & maintenance cost, sludge disposal costs, and the mitigation of environmental concerns relating to toxic non biodegradable solids sludge disposal.

Advanced electrocoagulation water treatment solutions can provide value in several aspects of the textile wastewater treatment process. These aspects include primary pretreatment to remove/reduce non biodegradable, toxic compounds and color prior to a biological process or as a polishing pretreatment for specific contaminants such as colloidal organics, minerals, or microbiological contaminants prior to ultrafiltration (UF) or reverse osmosis desalination (RO) systems.

Topics

  • Optimizing textile wastewater treatment method for reuse
  • Promising cost-saving technology to conserve and augment available water resources
  • Advanced innovative water treatment solutions for reducing waste footprint
  • Case study for textile industry wastewater treatment & reuse
  • Treatment of textile waste water using natural catalyst (chitosan and microorganism)

    The study investigates the performance of chitosan and microorganism towards treatment of textile wastewater by using aeration & flocculation process. Chitosan is found from chitin by deacetylation. Flocculation and the process are done using Jar test experiment. The effect of dosage, reduction of COD, reduction of BOD and color of textile wastewater is studied. The results obtained found that chitosan is very effective for reduction of COD, BOD and color.

    Topics

  • Bioflocculants for effective textile wastewater treatment
  • Promising adsorption additive for wastewater pollutants
  • Chitosan as a replacement of microorganisms for removal of COD and BOD
  • Biochemical treatment of textile industrial wastewater

    Environmental  management  projects  require  economic  integrated  approach  including  the  combination  of  in–process, in–plant and end–of–pipe treatment modules to comply with environmental regulations.

    The main objectives of this study to management and control of liquid and solid wastes in the industry as well as find a sustainable solution for the textile industrial wastewater in order to comply with the National Regulatory Standards governed by the ministerial decree for wastewater discharge into public sewage network to protect the environment as well as selecting the wastewater streams that need to be treated prior to its discharge, identifying  the  different  possible  treatment  trains  for  the  wastewater,  conducting  treatability  analysis  for investigating  the  feasibility  of  each  of  the  identified  trains,  selecting  the  most  suitable  treatment  train,  and developing  the  basic  design  for  the  selected  treatment  train.

    The  study  is  conducted  through  very  precise characterization of the wastewater produced from the final effluent during the working shifts and application of appropriate  treatment  options  for  the  end-of-pipe  using  different  treatment  techniques  in  order  to  protect water resources from contamination.

    Topics

  • Adoption of biochemical method for treatment of textile industrial wastewater
  • Identifying wastewater streams for better waste management plant design
  • Treatment combinations for effective wastewater management.
  • Peptides Fixing Industrial Textile Dyes: A New Biochemical Method in Wastewater Treatment

    An effluent treatment technique adapted to the dyes must eliminate them completely in order to avoid the formation of more dangerous by-products than the initial compounds and more particularly to prevent the formation of carcinogenic products. Conventional methods of treatment do not meet this expectation.

    The objective of this study is the development of a new biological approach which is more suitable in terms of cost-effectiveness, pollutant removal efficiency, and recyclability and inexpensive, effective, and eco-friendly (biodegradable) for the treatment of effluents of the textile industry. To our knowledge, this is the first report on the textile effluent treatments using peptides. This technology will be based on the best binding affinity of textile dyes on peptides synthesized via a solid-phase peptide synthesis (SPPS) technique.

    The objective of this study was development of a new biological method for the treatment of textile industry effluents, which is cheaper, more profitable, and eco-friendly. This method is essentially based on the synthesis of dye-fixing peptides. The use of peptides synthesized via a solid-phase synthesis to fix a reference textile dye like “Cibacron blue” (CB) and the performance analysis of binding assays were the main objectives of this study. For this reason, two peptides P1 (NH2-C-G-G-W-R-S-Q-N-Q-G-NH2) and P2 (NH2-C-G-G-R-R-Y-Q-P-D-S-NH2) binding with the CB dye were synthesized by the solid-phase peptide synthesis (SPPS) technique. The obtained results showed significant fixation yields of CB-peptides of 91.5% and 45.9%, respectively, and consequently, their interesting potential as a tool for a new biochemical method in the pollution prevention of textile wastewater.

    Topics

  • Biochemical method in the pollution prevention of textile wastewater
  • Peptide synthesis strategy for textile wastewater treatment
  • Inexpensive eco-friendly textile wastewater treatment
  • Textile Wastewater Treatment for Water Reuse: A Case Study

    The reduced natural waters and the large amount of wastewater produced by textile industry necessitate an effective water reuse treatment. In this study, a combined two-stage water reuse treatment was established to enhance the quality and recovery rate of reused water. The primary treatment incorporated a flocculation and sedimentation system, two sand filtration units, an ozonation unit, an ultrafiltration (UF) system, and a reverse osmosis (RO) system. The second treatment included an ozonation unit, a sand filtration unit, and UF and RO systems. The color removal rate increased with the increasing ozone dosage, and the relational expression between the ozone dosage and color removal rate was fitted. Ozonation greatly reduced the color by 92.59 and 97.27 times during the primary and second ozonation stages, respectively. RO had the highest removal rate. The combined processes showed good performance in water reuse treatment.

    Topics

  • Combined two-stage water reuse treatment or textile industry
  • Reactive Precipitation + Primary Sand Filtration + Primary Ozonation + Second Sand Filtration
  • Performance of Individual Process for the Removal of Various Contaminants