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.

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.

PDF

___

E. Turano, S. Curcio, M. G. De Paola, V. Calabrò, ve G. Iorio, “An integrated centrifugation-ultrafiltration system in the treatment of olive mill wastewater”, J. Memb. Sci., c. 209, sayı 2, ss. 519–531, 2002.
A. Ginos, T. Manios, ve D. Mantzavinos, “Treatment of olive mill effluents by coagulation-flocculation-hydrogen peroxide oxidation and effect on phytotoxicity”, J. Hazard. Mater., c. 133, sayı 1–3, ss. 135–142, 2006.
S. Khoufi, F. Aloui, ve S. Sayadi, “Treatment of olive oil mill wastewater by combined process electro-Fenton reaction and anaerobic digestion”, Water Res., c. 40, sayı 10, ss. 2007–2016, 2006.
G. Aggelis, D. Iconomou, M. Christou, D. Bokas, S. Kotzailias, G. Christou, V. Tsagou, ve S. Papanikolaou, “Phenolic removal in a model olive oil mill wastewater using Pleurotus ostreatus in bioreactor cultures and biological evaluation of the process”, Water Res., c. 37, sayı 16, ss. 3897–3904, 2003.
D. Dalis, K. Anagnostidis, A. Lopez, I. Letsiou, ve L. Hartmann, “Anaerobic digestion of total raw olive-oil wastewater in a two-stage pilot-plant (up-flow and fixed-bed bioreactors)”, Bioresour. Technol., c. 57, sayı 3, ss. 237–243, 1996.
T. H. Ergüder, E. Güven, ve G. N. Demirer, “Anaerobic treatment of olive mill wastes in batch reactors”, Process Biochem., c. 36, sayı 3, ss. 243–248, 2000.
B. Y. Ammary, “Treatment of olive mill wastewater using an anaerobic sequencing batch reactor”, Desalination, c. 177, sayı 1– 3, ss. 157–165, 2005.
G. Pinto, A. Pollio, L. Previtera, M. Stanzione, ve F. Temussi, “Removal of low molecular weight phenols from olive oil mill wastewater using microalgae”, Biotechnol. Lett., c. 25, sayı 19, ss. 1657– 1659, 2003.
C. F. Cereti, F. Rossini, F. Federici, D. Quaratino, N. Vassilev, ve M. Fenice, “Reuse of microbially treated olive mill wastewater as fertiliser for wheat (Triticum durum Desf.)”, Bioresour. Technol., c. 91, sayı 2, ss. 135–140, 2004.
K. Kestioǧlu, T. Yonar, ve N. Azbar, “Feasibility of physico-chemical treatment and Advanced Oxidation Processes (AOPs) as a means of pretreatment of olive mill effluent (OME)”, Process Biochem., c. 40, sayı 7, ss. 2409–2416, 2005.
M. Beccari, L. Bertin, D. Dionisi, F. Fava, S. Lampis, M. Majone, F. Valentino, G. Vallini, ve M. Villano, “Exploiting olive oil mill effluents as a renewable resource for production of biodegradable polymers through a combined anaerobic-aerobic process”, J. Chem. Technol. Biotechnol., c. 84, sayı 6, ss. 901–908, 2009.
I. Sabbah, T. Marsook, ve S. Basheer, “The effect of pretreatment on anaerobic activity of olive mill wastewater using batch and continuous systems”, Process Biochem, c. 39, ss. 1947–1951, 2004.
R. Andreozzi, G. Longo, M. Majone, ve G. Modesti, “Integrated treatment of olive oil mill effluents (OME): Study of ozonation coupled with anaerobic digestion”, Water Res., c. 32, sayı 8, ss. 2357–2364, 1998.
N. A. Oz ve C. C. Yarimtepe, “Ultrasound assisted biogas production from landfill leachate.”, Waste Manag., c. 34, sayı 7, ss. 1165–70, 2014.
N. A. Oz ve A. C. Uzun, “Ultrasound pretreatment for enhanced biogas production from olive mill wastewater”, Ultrason. Sonochem., c. 22, ss. 565–572, 2015.
S. Erdem, C. C. Yarımtepe ve N. A. Oz, "Zeytin Karasuyunun Arıtım Yöntemleri", Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi, c.1, sayı 1, 2015.
M. Bayramoglu, M. Kobya, M. Eyvaz, ve E. Senturk, “Technical and economic analysis of electrocoagulation for the treatment of poultry slaughterhouse wastewater”, Sep. Purif. Technol., c. 51, sayı 3, ss. 404–408, 2006.
S. Khoufi, F. Feki, ve S. Sayadi, “Detoxification of olive mill wastewater by electrocoagulation and sedimentation processes”, J. Hazard. Mater., c. 142, sayı 1–2, ss. 58–67, 2007.
K. Yetilmezsoy, F. Ilhan, Z. Sapci-Zengin, S. Sakar, ve M. T. Gonullu, “Decolorization and COD reduction of UASB pretreated poultry manure wastewater by electrocoagulation process: A posttreatment study”, J. Hazard. Mater., c. 162, sayı 1, ss. 120–132, 2009.
A. Public ve H. Association, “APHA: Standard Methods for the Examination of Water and Wastewater”, Am. Public Heal. Assoc. Water Work. Assoc. Environ. Fed., c. 552, 1998.
C. C. Yarimtepe, N. A. Oz ve O. Ince, "Volatile fatty acid production dynamics during the acidification of pretreated olive mill wastewater", Bioresour. Technol., c. 241, sayı October 2017, ss. 936-944, 2017.
O. Ince, M. Kolukirik, N. A. Oz, ve B. K. Ince, “Comparative evaluation of full-scale UASB reactors treating alcolhol distillery wastewaters in terms of performance and methanogenic”, J. Chem. Technol. Biotechnol., c. 80, sayı October 2003, ss. 138–144, 2005.
O. Ince, “Potential energy production from anaerobic digestion of dairy wastewater”, J. Environ. Sci. Heal. Part A - Toxic/Hazardous Subst. Environ. Eng., c. 33, sayı 6, ss. 1219–1228, 1998.
A. M. Deshpande, S. Satyanarayan, ve S. Ramakant, “Treatment of high-strength pharmaceutical wastewater by electrocoagulation combined with anaerobic process”, Water Sci. Technol., c. 61, sayı 2, ss. 463–472, 2010.
S. Khoufi, F. Aloui, ve S. Sayadi, “Extraction of antioxidants from olive mill wastewater and electro-coagulation of exhausted fraction to reduce its toxicity on anaerobic digestion”, J. Hazard. Mater., c. 151, sayı 2–3, ss. 531–539, 2008.
G. Zhen, X. Lu, Y. Y. Li, ve Y. Zhao, “Combined electrical-alkali pretreatment to increase the anaerobic hydrolysis rate of waste activated sludge during anaerobic digestion”, Appl. Energy, c. 128, ss. 93– 102, 2014.