Treatment of Landfill Leachate by Advanced Oxidation Processes

Year 2013, Volume: 25 Issue: 2, 51 - 64, 04.07.2013

Seda Koçak Cansu Güney M. Tuna Argun Begüm Tarkın E. Özlem Kırtman Deniz Akgül Bulent Mertoglu

https://doi.org/10.7240/mufbed.v25i2.051

Cited By: 1

Abstract

Organic and inorganic pollutants found in municipal landfill leachate lead to severe problems for the environment when directly discharged to water bodies without treatment. Due to the existence of recalcitrant organics in leachate, advanced oxidation processes (AOP) are mostly applied to biologically treated leachate as a polishing step. In this study, the effectiveness of Fenton process on leachate treatment was examined. The Fenton process was applied to both young (untreated) and biologically treated leachate provided from Şile Kömürcüoda Landfill in Istanbul. It was treated by using up flow anaerobic sludge blanket (UASB) reactor and membrane bio-reactor (MBR) processes respectively prior to AOP application. In addition, the combination of Ultraviolet (UV)/Fenton and Ultrasound (US)/Fenton processes were applied to biologically treated leachate to improve the efficiency of Fenton process. The results suggested that, Fenton process is an efficient oxidation method for the treatment of organic matter and color in leachate. It was able to remove 70 % chemical oxygen demand (COD) from the raw leachate, while for biologically treated leachate the COD removal was over 50 %. On the other hand, color removal was observed to be 90 % and 98% in old and young leachate respectively. It was also seen that the additional treatment techniques used in the study did not improve the treatment efficiency of Fenton process.

Keywords

Leachate, AOPs, Fenton, UV, US.

Treatment of Landfill Leachate by Advanced Oxidation Processes

Abstract

Katı atık depolama sahası sızıntı suyunda bulunan organik ve inorganik kirleticiler arıtılmadan direk olarak su kaynaklarına deşarj edildiğinde ciddi çevresel sorunlara yol açmaktadır. Biyolojik arıtmadan geçmiş sızıntı suyunda bulunan inatçı organikler için ileri oksidasyon yöntemleri çoğunlukla cilalama evresi olarak uygulanır. Bu çalışmada, Fenton prosesinin katı atık depolama sahası sızıntı suyu üzerindeki etkinliği incelenmiştir. Fenton prosesi İstanbul’daki Şile Kömürcüoda katı atık depolama sahasından temin edilen genç (arıtılmamış) ve biyolojik olarak arıtılmış sızıntı suyuna uygulanmıştır. Sızıntı suyu, ileri oksidasyon uygulaması öncesinde sırasıyla anaerobik yukarı akışlı çamur yatağı ve membran biyo-reaktör prosesleri ile arıtılmıştır. Buna ek olarak biyolojik olarak arıtılmış sızıntı suyuna verimi artırabilmek amacı ile ultraviyole/Fenton ve ultrasound/Fenton kombinasyonları da uygulanmıştır. Çalışmalar sonucunda Fenton prosesinin sızıntı suyunda renk ve organik madde arıtımında etkin bir yöntem olduğu ortaya konmuştur. Ham sızıntı suyunda %70 KOİ giderimi elde edilirken biyolojik olarak arıtılmış sızıntı suyunda bu değer %50’nin üzerindedir. Diğer taraftan renk giderimi ham ve biyolojik olarak arıtılmış sızıntı suyunda sırasıyla %90 ve %98 olarak gözlemlenmiştir. Fenton’a ek olarak uygulanan ultraviyole ışın ve ultrasound yöntemlerinin arıtma veriminde artış yaratmadığı belirlenmiştir.

Keywords

Sızıntı suyu, İleri oksidasyon, Fenton, UV, US

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