FERMENTATİF HİDROJEN ÜRETİMİNİN Α-SELÜLOZ İLE ANAEROBİK ÇAMUR VE SIĞIR GÜBRESİ KARIŞIMLARINI KULLANARAK DEĞERLENDİRİLMESİ

Anaerobik karışık kültür ve sığır gübresi karışımları ile kesikli deneylerde α-selülozun (2 ±1 g L-1) bio-hidrojen üretim performansı değerlendirilmiştir. Anaerobik çamur (AÇ) ve sığır gübresi (SG); 1/ 2- 1/ 15 arasında değişen giriş biyomas oranlarında karıştırılarak en iyi hidrojen üretim verimi ve miktarını veren optimum AÇ/ SG oranı saptanmıştır. Ayrıca AÇ ve SG karıştırılmadan hem α-selüloz hem de glukoz üzerindeki hidrojen üretimleri, karışımların performansları ile karşılaştırıl -mıştır. En yüksek hidrojen oluşumu (HF = 10 mmol L-1 kültür), üretim verimi (13 mmol H2 g -1 selüloz) AÇ/SG oranı 1/5 olduğunda elde edilmiştir. Kültürler ayrı ayrı, kayda değer hidrojen üretim verimleri vermesine rağmen, karışımlardan daha düşük değerlerde kalmıştır. Deneyler sonucuda elde edilen en iyi AÇ/ SG oranı olan 1/5 ile yeni bir deney yapılmış ve zamana karşı hidrojen üretim performansını belirleyen değerlerden hidrojen üretimi, yüzde selüloz dönüşümü, 192. saatte sırasıyla 10.88 mmol H2 L-1 kültür ve %52 olarak bulunmuştur. Asetik asit en yüksek uçucu yağ asidi olarak tayin edilmiştir

Anahtar Kelimeler:

Biyo-hidrojen, birleşik kültür, sığır gübresi, Anaerobik çamur, α-selüloz

UTILIZATION OF FERMENTATIVE HYDROGEN PRODUCTION FROM Α-CELLULOSE BY COMBINING ANAEROBIC SLUDGE AND CATTLE MANURE

Batch fermentation experiments were performed for utilizing bio-hydrogen production from α- cellulose solution (2 ±1 g L-1) by combining anaerobic mixed culture and cattle manure. Mixed cultures of anaerobic sludge (AÇ) and cattle manure (SG) were used with different initial biomass ratios, changed between 1/ 2 and 1/ 15, in order to determine the optimum AÇ/ SG ratio yielding the highest hydrogen gas formation and yield. Hydrogen production by only AÇ and SG mixed cultures were also realized along with the combined fermentations by growing them on αcellulose and glucose. The highest hydrogen formation (HF = 10 mmol L-1 culture), hydrogen yield (13 mmol H2 gr-1 cellulose) were obtained with AÇ/ SG ratio of 1/5. Hydrogen fermentations done with strains alone also yielded considerable hydrogen gas amounts, however less than the mixed ones. The best AÇ/SG ratio of 1/5 were tested for its hydrogen gas formation yield, percent cellulose conversion with time and 10.88 mmol H2 L-1culture, 52 %, were found respectively at 192 h. Acetic acid was the highest volatile fatty acid obtained in the experiments

Keywords:

biohydrogen, co-culture, cattle manure, anaerobic sludge, α-cellulose,

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