Alkalinity Problem in aTextile Processing water and Removal Techniques (original) (raw)
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NSTF, 2017
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METHODS FOR WASTE WATERS TREATMENT IN TEXTILE INDUSTRY
The processes of production of textiles or wet treatments and finishing processes of textile materials are huge consumers of water with high quality. As a result of these various processes, considerable amounts of polluted water are released. This paper puts emphasis on the problem of environmental protection against waste waters generated by textile industry. The methods of pre-treatment or purification of waste waters in the textile industry can be: Primary (screening, sedimentation, homogenization, neutralization, mechanical flocculation, chemical coagulation), Secondary (aerobic and anaerobic treatment, aerated lagoons, activated sludge process, trickling filtration, oxidation ditch and pond) and Tertiary (membrane technologies, adsorption, oxidation technique, electrolytic precipitation and foam fractionation, electrochemical processes, ion exchange method, photo catalytic degradation, thermal evaporation). The selection of the purification method depends on the composition and type of waste waters.
2010
This paper discusses on treating effluent in the textile Industry. Several countries, including India have introduced strict ecological standards. They are consumes large quantities of water and produces large volumes of wastewater in processes. Wastewater from textile industry has a high or low pH, high temperature and a high concentration of organic materials. Removing color and organics from wastewater is more important because the presence of small amounts of dyes is clearly visible and detrimentally affects the water quality. Simple chemicals such as alum, lime or iron salts can be added to wastewater to cause heavier masses which can be removed faster through physical processes. The analysis results were depicted in the stage-wise performance of the ETP of inlet and outlet effluent quality. The receiving influent pH 7.25 and effluent pH was 7.8. The removal efficiency of total dissolve solids, total suspended solids, chemical oxygen demand and chloride was hardly to be 22.66%, 69.52%, 90.46% and 9.93% respectively. The results of the Treatability study have shown that alum dosing individually and in combination with lime can remove color and COD from moderate to high degree of dose. 100 ppm of alum dose gives desired reduction of color and COD.
Methods for waste water treatment in fabric industry
The processes of textiles making or wet treatments and the finishing processes of textile materials are huge consumers of water with high quality. As a result of these different processes, significant amounts of polluted water are released. This study focuses on the problem of environmental protection against waste waters generated by textile industry. The methods of pre-treatment or purification of waste waters in the textile industry can be: Primary (screening, sedimentation, homogenization, neutralization, mechanical flocculation, chemical coagulation), Secondary (aerobic and anaerobic treatment, aerated lagoons, activated sludge process, trickling filtration, oxidation ditch and pond) and Tertiary (membrane technologies, adsorption, oxidation procedure, electrolytic precipitation and foam fractionation, electrochemical processes, ion exchange method, photo catalytic degradation, thermal evaporation). The assortment of the purification method depends on the composition and type of waste waters.
IRJET- Overview of Effluent Treatment Plant Used for Textile Indstry
IRJET, 2021
bstract-India is undergoing in rapid increase of industrial sector and it is concerning by many environmental factors as waste from these industries is directly dumped in water bodies and it can create serious impact to aquatic life and ecology. So, this effluent needs to be treated well before being dumped. Effluent from various types of industries such as textile, pharma, pigment, dairy contains exaggerated amount of toxic chemicals and other chemical factors. Certain processes such as reactive dyeing in textile industries require large quantities of alkali but pre-treatments and some washes can be acidic. It is therefore necessary to adjust the pH in the treatment process to make the wastewater neutral. Speaking of the textile industries, it needs enormous amount of water and variety of chemicals for different operations such as washing, dying, etc. the spillage of these chemicals, cause significant hazard to environment. On the other hand, dairy industry's wastewater generally contains fats, lactose, proteins, nutrients which increase the Biological Oxygen Demand (BOD) of water. It may also contain detergents and sanitizing agents which are obtained by cleansing process and it leads to increase in Chemical Oxygen Demand (COD). This paper gives an overview of effluent treatment plant used in textile industrial sector. This paper also provides a statistical data about ETP's and factors affecting it.
Water and chemical management studies for cleaner production in a textile industry
Chemical engineering transactions, 2014
In this study, environmental performance of a textile mill employing fiber production and subsequent dyeing was evaluated in detail. Cleaner production assessment studies based on Integrated Pollution Prevention and Control (IPPC) principles were conducted. Specific water and chemical consumptions in wet processes were calculated using mass balance analysis. The potential wastewater and/or chemical recovery and reuse options were determined. A company-wide chemical inventory study was conducted and the chemicals were evaluated in terms of their toxicological effects. It was found that a total of 29 chemicals should be replaced with less toxic and more biodegradable counterparts. By the application of suggested cleaner production options, the potential reductions in water and chemical consumptions and wastewater generations were determined. After the implementation of good management practices, wastewater recovery and reuse, machinery modifications, and chemical optimizations/replace...
Optimal treatment and rational reuse of water in textile industry
Water Science and Technology, 1999
Because of the increasing water shortage in Flandres (Belgium), it will be necessary to switch over to alternative industrial water supply sources. The reuse of a part of the effluent requires the development and application of advanced water purification treatments in combination with process control. The current technologies under development in the frame of an EU-project are outlined. The latter project covers an integrated process for the provision of recycled water of guaranteed quality with minimum emissions. The whole process is divided into three modules; a sensor protected aerobic stage (SPAS), an anaerobic treatment (ANASORB) and a holistic polishing (HOLIPOL) module. The modules are flexible in application and can be used separately or together. The case of a jeans fmishing plant in which a total recycling system at full scale is operated, is discussed. 0 1999 IAWQ Published by ABSTRACT Because of the increasing water shortage in Flandres (Belgium), it will be necessary to switch over to alternative industrial water supply sources. The reuse of a part of the effluent requires the development and application of advanced water purification treatments in combination with process control. The current technologies under development in the frame of an ED-project are outlined. The latter project covers an integrated process for the provision of recycled water of guaranteed quality with minimum emissions. The whole process is divided into three modules; a sensor protected aerobic stage (SPAS), an anaerobic treatment (ANASORB) and a holistic polishing (HOUPOL) module. The modules are flexible in application and can be used separately or together. The case of a jeans fmishing plant in which a total recycling system at full scale is operated, is discussed.
Sainteks: Jurnal Sains dan Teknik, 2020
Polyester fabrics are the most popular clothing material in the textile product manufacturing process and are widely used. Small floral motifs, line or small dots that are sharp and bright (more than one color) on the basis of contrasting or dark colors usually obtained by discharge printing or resist printing, because it is not easy to do by direct printing in a large amount of production. In printing alkali discharge, polyester fabrics are used dispersion dyes that can be damaged by alkali (azo type) as the base color. Color motifs are used dispersion dyes that are resistant to alkalis (anthraquinone type) which do not have ester groups in their chromophore. The aim of this study was to to determine the effect of variations in the concentration of sodium carbonate and fixation time on alkaline discharge imprinting and the effect on the physical properties of fabrics. The optimum conditions were achieved in sodium carbonate 200 g/kg paste, temperature 180 °C for 6 minutes, white degree of fabric Δ K/S 0.01684 , fabric tensile strength of 17,40 kg towards warp 18,05 kg towards the feed, fastness to washing 4-5, color fastness to wet rubbing and dry rubbing 5.
Alternative Method for Treatment of Wastewater in Textile industry : Review
International Journal of Scientific Research in Science and Technology, 2020
In the early days of industrial revolution the waste water generated was simply passed to water bodies like rivers, wells, etc. which was fine for that time as the amount of wastewater generated was very less. The process of dilution was the principle and water purification used to take place by surrounding environment of water called as self-purification of streams. But as soon as the more and more industries were established it was seen that the self-purification process fails to purify water because the quantity of wastewater flown in water bodies was much more than its capacity to purify it. Hence there was a need of effluent treatment plants. Textile industry creates a lot of wastewater having very high amount of color. The color present in water reduces its acceptability aesthetically. Also the color present in water hampers the process of photosynthesis for the plants and other photosynthetic species if directly discharged in water bodies. The textile wastewater also has very high pH, COD, BOD
2016
In Ethiopia the rules of Ministry of Environment factories wastewater must treat before discharge as well as monitor the quality of their wastewater and stay within national discharge quality standard. Even there is stick rule and regulation some time due to in proper management or lack of technical expertise characteristics of the effluent cross the dischargeable limit. The aim of research work is to examine the performance of effluent treatment of Textile Industry and study the physicochemical parameter.