Otomotiv endüstrisinde boyama prosesleri, çevresel endişelerin ana kaynaklarından biri olarak ortaya çıkmaktadır. Bu çalışmada otomotiv endüstrisi boyama prosesinden elde edilen atıksuyun koagülasyon-flokülasyon, ultraviyole/hidrojen peroksit (UV/H2O2) ve Fenton prosesleri ile arıtılabilirliği incelenmiştir. Koagülasyon-flokülasyon prosesinde farklı pH, koagülant ve anyonik polimer dozlarının etkisi karşılaştırılmış ve optimum şartlar kimyasal oksijen ihtiyacı (KOİ) ve bulanıklık giderim verimine göre belirlenmiştir. Çalışma sonucunda en yüksek %49.6 KOİ ve %74.4 bulanıklık giderim veriminin elde edildiği koagülant olarak tespit edilen demir (III) klorür için optimum koşullar pH 8, koagülant konsantrasyonu 400 mg L-1 ve anyonik polimer dozu 1 mg L-1 olarak belirlenmiştir. Giderim verimini arttırmak amacıyla koagülasyon-flokülasyon prosesi çıkış suyuna Fenton ve UV/H2O2 prosesleri uygulanmıştır. Sonuçlar değerlendirildiğinde maksimum KOİ giderim verimi pH=3 ve 400 mg L-1 H2O2 konsantrasyonunda uygulanan UV/ H2O2 prosesi ile % 63.4 olarak elde edilmiştir. Ancak Fenton prosesinde ise maksimum %51 KOİ giderimi sağlanabilmiştir. Bu çalışmadan, koagülasyon flokülasyon ardından uygulanacak UV/H2O2 prosesinin giderim verimini arttırdığı ve otomotiv endüstrisi boyama prosesi atıksuları için alternatif ve etkili bir proses olabileceği sonucuna varılmıştır.
In the automotive industry, painting operations have emerged as a major source of environmental concerns. In this study, the treatability of wastewater obtained from the automotive industry painting process was investigated by using coagulation-flocculation, ultraviolet/hydrogen peroxide (UV/H2O2), and Fenton processes. The effects of pH, coagulant, and anionic polymer doses were examined for three different coagulants in the coagulation-flocculation process. Optimal conditions were determined based on chemical oxygen demand (COD) and turbidity removal efficiency. As a result of the study, the optimum conditions for the coagulant identified as ferric chloride, which achieved the highest COD removal of 49.6% and turbidity removal of 74.4%, were determined as pH 8, coagulant dose of 400 mg L-1, and anionic polymer dose of 1 mg L-1. In the second stage of the study, Fenton and UV/H2O2 processes were applied to the effluent of the coagulation-flocculation process to increase the removal efficiency. When the results were evaluated, it was observed that the maximum COD removal efficiency of 63.4% was attained under the conditions of pH 3 and 400 mg L-1 H2O2 concentration applied in the UV/H2O2 process. However, in the Fenton process, a maximum COD removal efficiency of only 51% was achieved. From this study, it can be concluded that the UV/ H2O2 process applied after coagulation-flocculation increases the removal efficiency and can be an alternative and effective treatment process for wastewater from the automotive painting process.
We would like to thank the Environmental Engineering Department of Aksaray University for providing laboratory equipment for the work described in this paper.
Primary Language | English |
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Subjects | Environmental Engineering (Other) |
Journal Section | Research Articles |
Authors | |
Early Pub Date | February 15, 2024 |
Publication Date | April 15, 2024 |
Submission Date | November 14, 2023 |
Acceptance Date | January 15, 2024 |
Published in Issue | Year 2024 Volume: 13 Issue: 2 |