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Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, Wydział Budownictwa i Architektury, al. Piastów 50, 70-311 Szczecin
Publication date: 2017-10-01
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Natalia Dąbkowska   

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, Wydział Budownictwa i Architektury, ul. Srebrna 5/1, 70-704 Szczecin
Inż. Ekolog. 2017; 5:1-4
Industrial laundries are one of the largest consumers of water, which is associated with significant generation of laundry wastewater. Water is one of the most important technological factors in the laundry industry. The amount of laundry wastewater generated is the result of the quantity of textile laundered and is roughly equal to the amount of technological water used to reduce the losses caused by evaporation. The quality of raw laundry wastewater depends on the quantity of impurities removed during the textile washing process and on the amount and quality of detergents added to the washing bath. The aim of the research was to conduct a determination analysis of raw laundry wastewater from industrial laundry located in Nowe Czarnowo. The subject of the study was raw laundry wastewater cleaned mechanically from a 500 ml autosampler tank to obtain a representative test sample. Raw wastewater quality designations were made using photometric methods Hach Lange's cuvette tests. The following determinations were made: anionic detergents, nonionic detergents, COD, BOD5, chlorides, total phosphate, total nitrogen and total organic carbon. The pH was also determined. On the basis of the obtained results, it can be concluded that industrial laundry wastewater contains organic compounds at the level of 126 to 153 mg/dm3. In addition, the analyzed raw wastewater is characterized by the presence of surfactants such as anionic and nonionic detergents ranging from 11.0 to 54.6 mg/dm3. The increased content of surfactants is closely related to the specific characteristics of industrial laundries. According to the literature, the values of individual indicators of raw laundry wastewater do not deviate from the values found in other types of industrial laundry.
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