Advanced Treatment of Pre-treated Commercial Laundry Wastewater by Adsorption Process: Experimental Design and Cost Evaluation
Sevil Veli 1  
,  
Ayla Arslan 1  
,  
Çisil Gülümser 1  
,  
Eylem Topkaya 1  
,  
Hatice Kurtkulak 1  
,  
Şehriban Zeybek 1  
,  
Anatoli Dimoglo 2  
,  
 
 
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1
University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey
2
University of Düzce, Department of Environmental Engineering, 81620 Düzce, Turkey
3
University of Kocaeli, Ali Rıza Veziroğlu Vocational School of Higher Education, Department of Environmental Protection, 41080 Kocaeli, Turkey
CORRESPONDING AUTHOR
Sevil Veli   

University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey
Publish date: 2019-11-01
 
J. Ecol. Eng. 2019; 20(10):165–171
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ABSTRACT
In Turkey, commercial laundry wastewater is usually discharged to the receiving water bodies and the reuse potential of them is ignored. This wastewater is grouped into the greywater due to their content of organic and inorganic pollutants. Recent years, the sequential processes have become more preferable in greywater treatment and reuse. In this study, a batch adsorption process is applied for further treatment of commercial laundry wastewater which is also pre-treated by 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), are used as adsorbents. The efficiency of the process is evaluated by experimental design, and response surface methodology is applied for this purpose. In the experiment with PAn/HS, the chemical oxygen demand (COD) removal efficiency is accomplished as 75% 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 is 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 are estimated as 0.70 USD/g and 3.21 USD/g for PAn/HS and PPy/HS, respectively. In terms of production cost, PAn/HS composite is approved more agreeable as adsorbents for commercial laundry wastewater treatment.