Kompozit Anot Elektrotlu İki Bölmeli Mikrobiyal Yakıt Pili Kullanılarak Evsel Atıksu Arıtımı ve Elektrik Üretiminin Araştırılması

Mikrobiyal yakıt hücresi, ekzoelektrojenik mikroorganizmalar tarafından organik substratların oksidasyonu ile elektrik üreten bir biyoelektrokimyasal sistemdir. Mikrobiyal yakıt pilleri (MYH) üzerine yapılan çalışmaların genel olarak üretilen enerji miktarını artırmaya yönelik olduğu söylenebilir. Bu çalışmada, iki bölmeli bir mikrobiyal yakıt hücresi kullanılarak evsel atıksu arıtımı araştırılmıştır. Substrat olarak Ankara Tatlar Atıksu Arıtma Tesisi giriş suyu kullanılmıştır. Anot ve katot elektrotu arasındaki mesafeyi azaltarak difüzyon direncini düşürmek için katot bölmesi anot bölmesinin ortasına yerleştirilmiştir ve bu bölmeler Nafion 117 membranı ile ayrılmıştır. Ayrıca elektrik üretim potansiyelini artırmak için paslanmaz çelik kafes ve grafit destekli bir anot elektrodu geliştirilmiştir. Deney sırasında maksimum voltaj 595 mV ve maksimum güç yoğunluğu değerleri 205.867 mW/m2 olarak elde edilmiştir. KOİ değeri, sistemlerin atıksu arıtma kabiliyetini gösteren bir kriterdir. Bu deney için atıksuların KOİ değerleri deney başlangıcında ve sonunda 451 mg/L O2 ve 361 mg/L O2 olarak ölçülmüştür. Bu sonuçlar, geliştirilen elektrot yapısının iki bölmeli MYH çalışmaları için literatürde bildirilen değerlerle karşılaştırılabilir düzeyde olduğunu kanıtlamıştır.

Anahtar Kelimeler:

mikrobiyal yakıt hücresi, kompozit elektrot, evsel atıksu arıtımı, elektrik üretimi

Investigation of Domestic Wastewater Treatment and Electricity Generation Using A Two Chambered Microbial Fuel Cell with Composite Anode Electrode

Microbial fuel cell is a bioelectrochemical system that generate electricity with the oxidation of organic substrates by exoelectrogenic microorganisms. It can be said that the studies on microbial fuel cells (MFCs) are generally aimed to increase the amount of energy produced. In this study, domestic wastewater treatment was investigated by using a two-chamber microbial fuel cell. Ankara Tatlar Wastewater Treatment Plant influent water was used as substrate. In order to reduce the diffusional resistance by reducing the distance between the anode and cathode electrode, the cathode chamber was placed in the middle of the anode chamber. Anode and cathode chambers separated by Nafion 117 membrane. In addition, an anode consisting of a stainless-steel mesh and a graphite supported catalyst has been developed to increase the electricity generation potential. During the experiment, the maximum voltage and the maximum power density values were obtained as 595 mV and 205.867 mW/m2 respectively. COD value is a criteria which indicates the waste treatment ability of the systems. For this experiment COD values of the wastewaster were measured both the beginning and the end of the experiment as 451 mg/L O2 and 361 mg/L O2. These results proved that the developed electrode structure is at a comparable level with the values reported in the literature for two-chamber MFC studies.

Keywords:

microbial fuel cell, composite electrode, domestic wastewater treatment, electricity generation,

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