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    Advanced Treatment of Pre-treated Commercial Laundry Wastewater by Adsorption Process: Experimental Design and Cost Evaluation
    (Polish Soc Ecological Engineering, 2019) Veli, Sevil; Arslan, Ayla; Gülümser, Çisil; Topkaya, Eylem; Kurtkulak, Hatice; Zeybek, Şehriban; Dimoglo, Anatoli
    In Turkey, the commercial laundry wastewater is usually discharged to the receiving water bodies and its reuse potential is ignored. This wastewater is grouped into the greywater due to their content of organic and inorganic pollutants. In recent years, the sequential processes have become more preferable in greywater treatment and reuse. In this study, a batch adsorption process was applied for further treatment of commercial laundry wastewater which is also pre-treated by means of the electrocoagulation process. In adsorption, two different composites of waste hazelnut shell derived activated carbons, which are supported with polyaniline (PAn/HS) and polypyrrole (PPy/HS), were used as adsorbents. The efficiency of the process was evaluated by means of an experimental design, and the response surface methodology was applied for this purpose. In the experiment with PAn/HS, the chemical oxygen demand (COD) 75% removal efficiency was accomplished with adsorbent dosage of 0.9 g, at pH 8, with 125 rpm mixing rate and for 77.5 min reaction time. For PPy/HS under the same experimental conditions, the COD removal efficiency was obtained as 20%. The utilization of waste hazelnut shell derived composites as adsorbents for commercial laundry wastewater treatment is a good alternative. The production costs of adsorbents were estimated as 0.70 USD/g and 3.21 USD/g for PAn/HS and PPy/HS, respectively. In terms of the production cost, the PAn/HS composite is approved more agreeable as adsorbents for commercial laundry wastewater treatment.
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    Öğe
    Investigation of Greywater Treatment by Adsorption Process Using Polymeric Composites Supported with Activated Carbon
    (Serkan ŞAHİNKAYA, 2018) Topkaya, Eylem; Veli, Sevil; Arslan, Ayla; Kurtkulak, Hatice; Zeybek, Şehriban; Gülümser, Çisil; Dimoglo, Anatoli
    In this study, treatment of greywater from laundry washing was investigated by adsorption process with the use of different waste material derived adsorbents. To synthesize the adsorbents, walnut shell, seed hull, hazelnut shell and rice husk were carbonized and then supported with polyaniline. KIO3 and K2S2O8 were used as oxidizing agents in the polymerization of aniline monomers. Wastewater treatment efficiencies were evaluated in terms of turbidity, color and MBAS (detergent) parameters. Adsorption experiments were conducted with 100 mL of wastewater and 1 g of adsorbent, for 2 h of reaction time, at room temperature and mixing speed of 150 rpm. As a result of studies with different oxidizing agents; the highest removal efficiencies were calculated for the PAn/RH+KIO3 adsorbent as 98%, 70% and 96% for color, turbidity and detergent, respectively, while for the PAn/SH+K2S2O8 adsorbent they were 58%, 3% and 95% for the same parameters.