Pamukkale Univ Muh Bilim Derg. Ahead of Print: PAJES-43995 | DOI: 10.5505/pajes.2023.43995

Application of various aluminum electrode connection methods to laundry wastewater via electrocoagulation

Hatice KURTKULAK, Sevil VELÝ
Kocaeli University, Engineering Faculty, Department of Environmental Sciences, Kocaeli, Turkey

In this work, various bonding techniques for the aluminum electrode were used to explore the electrocoagulation method for treating laundry wastewater. By combining the laundry water in specific ratios (1: 1: 1,5 ratio of the wastewater after prewash, main wash, and rinsing), the wastewater was characterized. Aluminum electrodes were employed as the anode and cathode, and purification was conducted using monopolar parallel (MP-P), monopolar series (MP-S), and bipolar parallel (BP-P) in various connection configurations. For each bonding form, the impacts of process variables like pH, current density, and time on COD, MBAS, and turbidity removal were examined. In the experiments, the maximum removal efficiencies for COD, MBAS, and turbidity, respectively, were obtained in the form of MP-P binding, at pH 5.5 for 15 minutes and at a current density of 5 mA/cm2. The corresponding values were 80%, 97%, and 97%, respectively. The optimum removal conditions in the system examined with a monopolar parallel connection were pH 5.5, duration 15 minutes, current density 5 mA/cm2, temperature 25 ○C and stirring speed 200 rpm. The optimal removal efficiencies for MBAS, COD, and turbidity were determined to be 97%, 80%, and 96%, respectively.

Keywords: Laundry wastewater, Electrocoagulation, Monopolar parallel, Aluminum electrode, Anionic surfactant removal.

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Alüminyum elektrotun farklý baðlanma þekillerinin elektrokoagülasyon yöntemiyle çamaþýrhane atýksuyuna uygulanmasý

Hatice KURTKULAK, Sevil VELÝ
Kocaeli Üniversitesi, Mühendislik Fakültesi, Çevre Bilimleri Ana Bilim Dalý, Kocaeli, Türkiye

Bu çalýþmada alüminyum elektrotun farklý baðlanma þekilleri kullanýlarak elektrokoagülasyon yöntemi ile çamaþýrhane atýksuyunun arýtýmý incelenmiþtir. Çamaþýr yýkama sularý belirli oranlarda (ön yýkama, ana yýkama ve durulama sonrasý atýksular 1: 1: 1,5 oranýnda) karýþtýrýlarak atýksuyun karakterizasyonu yapýlmýþtýr. Anot ve katot olarak kullanýlan alüminyum elektrotun farklý baðlanma þekillerinde, monopolar paralel (MP-P), monopolar seri (MP-S) ve bipolar paralel (BP-P) ile arýtým gerçekleþtirilmiþtir. Her bir baðlanma þekillerinde pH, akým yoðunluðu ve süre gibi proses deðiþkenlerinin MBAS, KOÝ ve bulanýklýk giderimi üzerine etkileri incelenmiþtir. Yapýlan denemelerde maksimum giderim verimi KOÝ, MBAS, bulanýklýk için sýrasýyla; %80, %97, %97 deðerleri ile MP-P baðlanma þeklinde pH 5.5 deðerinde 15 dakika süre ve 5 mA/cm2 akým yoðunluðunda elde edilmiþtir. Monopolar paralel baðlantý þekli ile çalýþýlan sistemde optimum giderim koþullarý pH 5.5, süre 15 dakika, akým yoðunluðu 5 mA/cm2, sýcaklýk 25 ○C ve karýþtýrma hýzý 200 rpm bulunmuþtur. Optimum giderim verimleri ise MBAS, KOÝ, bulanýklýk için sýrasýyla; %97, %80, %96 deðerleri tespit edilmiþtir.

Anahtar Kelimeler: Çamaþýrhane atýksuyu, Elektrokoagülasyon, Monopolar paralel, Alüminyum elektrot, Anyonik yüzey aktif madde giderimi.

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