Canan CAN YARIMTEPE, Nilgün AYMAN ÖZ, Orhan İNCE

Zeytin Karasuyunun Elektrokoagulasyon Ön Arıtımlı Tek Fazlı Anaerobik Arıtımı

Bu çalışma kapsamında Çanakkale ili ve çevresi için önemli bir çevre sorunu teşkil eden zeytin karasuyunun tek fazlı ardışık kesikli anaerobik reaktörler ile arıtılabilirliği elektrokoagulasyon ön arıtımı kullanılarak incelenmiştir. Elektrokoagulasyon ön işlemi sayesinde, karasudaki kirletici konsantrasyonları, askıda katı madde miktarı başta olmak üzere çeşitli kirletici parametreleri bazında önemli bir giderim sağlanmıştır. Ön arıtılmış karasu numuneleri tek fazlı anaerobik reaktöre beslenerek, anaerobik arıtım verimliliği; çKOİ giderimi, biyogaz oluşumu ve metan içeriği açısından incelenmiştir. Hidrolik bekletme süresi 1 gün; çamur bekletme süresi 20 gün; organik yükleme oranı 1 gr KOİ/gr UAKM-gün olarak 30 gün boyunca işletilen ardışık kesikli anaerobik reaktörde; ortalama %70 organik madde giderimi elde edilmiştir. Eş zamanlı olarak günlük ortalama %80 metan içerikli 1000 mL biyogaz oluşumu sağlanmıştır. İşletme süresince metan üretim hızı ortalama 0,27 mL CH4/gr KOİgiderilen ve kümülatif metan gazı oluşumu 19981 mL olarak tespit edilmiştir. Ön arıtımlı tek fazlı anaerobik arıtım ile; karasuyun organik madde içeriğinde büyük oranda giderim elde edilmiş, eş zamanlı olarak da temiz bir enerji kaynağı olan metan içeriği yüksek biyogaz eldesi sağlanmıştır. Bu çalışmanın bulguları; elektrokoagulasyon gibi kısa süreli bir ön arıtım ile; karasuyun tek fazlı anaerobik reaktöre doğrudan beslenebildiğini aynı zamanda bu sistemlerden yüksek verimi alınabileceğini göstermektedir.

Anahtar Kelimeler:

Zeytin karasuyu, Ön arıtım, Elektrokoagulasyon, Anaerobik arıtım, KOİ giderimi, Biyogaz oluşumu

Single phase Anaerobic treatment of Olive Mill Wastewater pretreated by Electrocoagulation

In this study, anaerobic treatability of olive mill wastewater (OMW) which is an important environmental problem for Canakkale province, was investigated by using electrocoagulation pretreatment. With electrocoagulation pretreatment; significant pollutant removal efficiencies, mainly in terms of suspended solids, has been provided. Pretreated OMW samples were fed to single phase anaerobic reactor and anaerobic treatability has been investigated in terms of sCOD removal, biogas production and methane yield. In sequencing batch anaerobic reactor which was operated with 1 day as HRT, 20 days as SRT and 1 gr COD/gr VSS-day as OLR; organic matter removal efficiency was determined as about 70% for 30 days. Daily biogas production and methane yield were determined as 1000 mL and 80%, respectively. During the operation; while 19981 mL methane was produced, methane production rate was determined as 0.27 mL CH4/gr CODremoved. With electrocoagulation assisted single phase anaerobic treatment; while organic matter concentration of OMW has been significantly removed, biogas with high methane content has been produced simultaneously. According to results of this study, it has been stated that, with a preatment in short duration like electrocoagulation, pretreated olive mill wastewater could be fed directly to anaerobic reactor and high efficiencies could be obtained in anaerobic reactors.

Keywords:

Olive mill wastewater, pretreatment, electrocoagulation, anaerobic treatment, cod removal, biogas production,

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