A chemical substitution study for a wet processing textile mill in Turkey

Öztürk, Ertan
The main environmental concern in the textile industry is about the amount of water discharged and the chemical load it carries. The total quantity of chemicals used in textile mills varies from 10% to over 100% of the weight of the cloth produced. Many chemicals currently used in the textile industry affect the amount and the type of waste produced and their influence the aquatic life of the receiving stream. One of the critical steps in pollution prevention studies is auditing the use of chemicals and making the necessary chemical substitutions. Chemical substitution simply means the replacement and/or reduction of hazardous chemicals in products and processes with less- or non-hazardous ones. This study was conducted on one of the major textile factories in Turkey with a capacity of 20,000 tons of denim fabric per year. During this study, chemical consumption level, recipes applied, environmentally problematic and alternative chemicals were examined. Integrated Pollution Prevention and Control (IPPC) Reference Document on Best Available Techniques (BAT) for the Textile Industry was accepted as main reference document and also related case studies were examined. According to the study, over 60% reduction in sulphide, which is very toxic to aquatic life, was achieved by replacing sulphur dyestuff with low sulphide content. By replacing an alternative complexing agent, the mill not only prevented the 3100 kg/month COD load to the WWTP, but also obtained more biodegradable wastewater generated during production. On the other hand, some of the chemical substitution options were on progress or dropped.


Determination of thmfp of the reservoirs in Turkey : kinetics aspect
Artuğ, Mine; Dilek, Filiz Bengü; Department of Environmental Engineering (2004)
Chlorine is still the most commonly used disinfectant in many water treatment plants all over the World. However, studies conducted demonstrated that the chlorine reacts with the natural organic matter (NOM) in source waters, and leads to the formation of a variety of chlorinated organic compounds, disinfection by-products (DBPs). Among these, the most common are the trihalomethanes (THMs). In this study, kinetics of the THM formation was investigated. Kinetic experiments were carried out with the raw water...
Use of clinoptilolite for copper and nickel removel from aqueous solutions
Çağın, Volkan; İmamoğlu, İpek; Department of Environmental Engineering (2006)
Heavy metals are well known toxic priority pollutants. Hence, wastewaters containing these species must be treated prior to discharge into receiving bodies. In this study, the potential of Bigadiç clinoptilolite for Cu2+ and Ni2+ removal from wastewaters was investigated in batch and continuous reactors. Results of the preliminary experiments revealed the optimum operating conditions, namely, initial solution pH of 5 and 4 for Cu2+ and Ni2+, respectively and contact time of 48 hours. Additionally, condition...
A model for optimal operation of land-treatment sites for oily wastes
Ünlü, Kahraman (SAGE Publications, 2001-06-01)
Land treatment as a disposal technology has been extensively used for the disposal of oily wastes. Effective management of land treatment sites require optimal operation of the system in order to achieve the fastest and most complete degradation of petroleum hydrocarbons without contamination of the environment. This paper describes a model that can be used for optimising the operation of land treatment sites for oily wastes. The model is composed of system simulator and optimisation submodels. Conceptually...
The effects of aquifer heterogeneity on the natural attenuation rates of chlorinated solvents
Önkal, Başak; Ünlü, Kahraman; Department of Environmental Engineering (2005)
Monitored natural attenuation has been particularly used at sites where petroleum hydrocarbons and chlorinated solvents have contaminated soil and groundwater. One of the important aspects of the methodology that has been recognized recently is that the mass removal rates, the most important parameter to determine effectiveness of the methodology, is controlled by the groundwater flow regime and the aquifer heterogeneity. Considering this recognition, the primary objective of this study is to quantitatively...
Decolorization of Synthetic Dye Solutions by Using Basaltic Tephra and Clinoptilolite
Duygulu, Yusuf Bahadır; Atımtay, Aysel; Department of Environmental Engineering (2004)
Discharge of colored effluents without decoloration originated from textile industries may cause serious problems in the receiving environments. In this study, natural materials that are basaltic tephra and clinoptilolite were used to remove various dyestuffs used in the textile industry. Those materials are cheap and available in large quantities in Turkey. The investigation of adsorption of basic, acidic and reactive dyes on these materials is the objective of this study. During preliminary experiments it...
Citation Formats
E. Öztürk, “A chemical substitution study for a wet processing textile mill in Turkey,” M.S. - Master of Science, Middle East Technical University, 2007.