Elektrik Ark Ocağı Cürufunun Biyogaz Üretiminde Katkı Maddesi Olarak Kullanılması ve Etkileri

Anaerobik parçalanma prosesi organik atıkların mikroorganizmalar tarafından CH4, CO2 ve H2S gibi gazlara dönüştürüldüğü biyolojik bir prosestir. Anaerobik sistemde katkı maddeleri kullanılması, mikrobiyal toplulukların anaerobik ortamlarını iyileştirmek, mikroorganizmaların aktivitesini artırmak ve daha fazla biyogaz üretimi sağlamak için yaygın olarak kullanılan bir yaklaşımdır. Bu çalışmada elektrik ark ocağı cüruflarının (EAOC) anaerobik sistemde katkı maddesi olarak kullanılmasının biyogaz ve metan üretimi üzerindeki etkileri incelenmiştir. EAOC hurda demirden, demir çelik üretimi gerçekleştirilen bir firmadan temin edilmiş ve anaerobik sisteme belirli oranlarda (%1-5) eklenmiştir. Deneyler mezofilik şartlarda (36±1 oC), 30 günlük hidrolik bekletme sürelerinde (HBS) gerçekleştirilmiştir. 30 günlük bekletme süresi sonunda en yüksek kümülatif biyogaz üretimi 6021.90 mL ile %5 EAOC eklenen R9’da elde edilmiş ve en yüksek biyogaz verimi 219.8 mL.gVS-1 ile %4 EAOC eklenen R7’de elde edilmiştir.

Anahtar Kelimeler:

Anaerobik Parçalanma, Biyogaz, Elektrik Ark Ocağı, Cüruf, Katkı Maddesi

Use of Electric Arc Furnace Slag as an Additive in Biogas Production and Its Effects

Anaerobic digestion (AD) is a biological process in which organic wastes are converted into gases such as CH4, CO2, and H2S by microorganisms. In AD, using additives is a widespread approach to improve the anaerobic environment of microbial communities, increase microorganisms' activity, and provide more biogas production. This study investigates the effects of adding the electric arc furnace slag (EAFS) as an additive to the AD system on biogas and methane production. EAFS was obtained from a company that produces iron and steel from scrap iron and added to the AD system at specific concentrations (1-5%). Experiments were carried out in mesophilic conditions (36±1 oC) during a 30-day hydraulic retention time (HRT). As a result of batch experiments, at the end of the 30-day HRT, the highest cumulative biogas production was obtained in R9 with 6021.90 mL and 5% EAFS added, and the highest biogas efficiency was obtained in R7 with 219.8 mL.gVS-1 and 4% EAFS added. Furthermore, it was determined that the addition of EAFS to the AD system increased methane yield.

Keywords:

Anaerobic Digestion, Biogas, Electric Arc Furnace, Slag, Additive,

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