Treatment of Denim Product Manufacturing Wastewater by Hybrid Electrocoagulation/Electrooxidation Processes

Year 2019, Volume: 23 Issue: 3, 780 - 786, 25.12.2019

Murat Solak

https://doi.org/10.19113/sdufenbed.533386

Abstract

In this study, treatment of denim product
processing wastewaters by hybrid electrocoagulation (EC) and electrooxidation
(EOx) process were investigated. Effects of operating parameters such as pH,
current density and electrolysis time on removal of COD (Chemical Oxygen
Demand) and TDS (Total Dissolved Solids) were determined. EC process with Al
electrodes  where the pH value was 7,48,
current density was 120 A/m², and electrolysis time was 49,5 min
resulted in > 65 % COD and  51 % TDS
removal. At the same conditions removal efficiencies of EOx process for COD and
TDS with Ti/SS electrodes were found to be > % 70 and % 45, respectively. The color removal efficiency
of EC / EO hybrid process at optimum conditions was obtained as 84 % ​​(436
nm), 93 % (525 nm), 97 % (620 nm), while the energy consumption of EC and EO
process was 14,26 kWh/ m³ and 22 kWh/m³ respectively. The coefficient of determination (R²) value
for removal of COD and TDS in the EC and EOx reactor, was found to be 0.99 and
0.97, and R²_Adj value was found to be 0,96 and 0,92,
respectively. In
addition, the results of the statistical analysis indicated that the R² and R²_adj
values were close to 1 indicates that the experimental results and statistical
inferences were compatible and the Box-Behnken statistical design was effective
in order to determine the effects of process parameters.

Keywords

Electrocoagulation, Electrooxidation, Denim product processing wastewater, Al electrode, Titanium electrode, Stainless steel electrode

Hibrit Elektrokoagülasyon/Elektrooksidasyon Prosesleri ile Denim Ürün Üretim Atıksularının Arıtımı

Abstract

Çalışmada, denim ürün işleme atıksularının hibrit
Elektrokoagülasyon (EK) ve Elektrooksidasyon (EO) Prosesleri ile arıtımı
incelenmiştir. pH, akım
yoğunluğu ve elektroliz süresi gibi işletme parametrelerinin KOİ (Kimyasal
Oksijen İhtiyacı) ve TÇK (Toplam Çözünmüş Katı) giderimi üzerindeki etkileri
belirlenmiştir. pH değerinin 7,48, akım yoğunluğunun 120 A/m² ve elektroliz
süresinin 49,5 dakika olduğu Al (Alüminyum) elektrotlarının kullanıldığı EK
prosesi ile >% 65 KOİ ve % 51 TÇK giderimi sağlanmıştır. Aynı koşullarda, EO
işleminin KOİ ve TÇK için Ti (Titanyum)/PÇ (Paslanmaz Çelik) elektrotları ile giderim
verimleri sırasıyla % >70 ve % 45 olarak bulunmuştur. Optimum koşullarda EK/EO
hibrit prosesinin renk giderim verimi % 84 (436 nm), % 93 (525 nm), % 97 (620
nm) olarak elde edilirken, EK ve EO prosesinin enerji tüketimi sırasıyla 14,26
kWsa/m³ ve 22,71 kWsa/m³ olarak tespit edilmiştir. Ayrıca,
istatistiksel analiz sonucunda elde edilen R²
ve R²_adj değerlerinin 1'e yakın olması, deney
sonuçlarının ve istatistiksel çıkarımların uyumlu olduğunu ve işlem
parametrelerinin etkilerinin belirlenmesinde Box-Behnken istatistiksel
tasarımının etkili olduğunu göstermiştir.

Keywords

Elektrokoagülasyon, Elektrooksidasyon, Denim ürün üretim atıksuyu, Al elektrot, Titanyum elektrot, Paslanmaz çelik elektrot

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