Study on Accelerating Energy Conversion for Industrial Anaerobic Reactors

Abstract

Biogas energy, one of the renewable energy sources, has become a newly developing sector in Turkey. The existing biogas reactors in Turkey are generally continuous type reactors and use cattle manure (CM) as a substrate. According to the researches, the biogas yield of SG is considerably lower than the literature yields (50-100 ml/g volatile solids (VSSG)). Therefore, a study was conducted to increase the yield of CM. In this context, the biogas yield of CM was tested in a laboratory-scale 5L reactor at the operating temperature (35 °C) most commonly used by industrial reactors. After this reactor was determined as a control reactor, the reactor residue, which was free from soluble carbohydrates, proteins and oils and mostly containing lignocellulosic, was obtained. To this residue, 4% w/w NaOH pretreatment and trace metals nickel (Ni) and cobalt (Co) were added at different concentrations (50, 100 and 150 µg/total solids CM). In this way, compared to the control reactor, a result (36 - 47%) that can stimulate hydrogenotrophic activity and further increase biogas production as a result of the addition of these metals at certain concentrations was encountered. As a results of highest biogas yield of CM for the best Ni and Co concentrations was 509.5 ± 19.9 mL/g volatile solids.

Keywords

• Biogas
• industrial reactors
• trace elements
• Nickel
• Cobalt

Endüstriyel Anaerobik Reaktörler İçin Enerji Dönüşümünün Hızlandırılmasına Yönelik Bir Çalışma

Abstract

Yenilenebilir enerji kaynaklarından biri olan biyogaz enerjisi Türkiye’de yeni gelişmekte olan bir sektör haline gelmiştir. Türkiye’de mevcut biyogaz reaktörleri genellikle sürekli tip reaktörler olup substrat olarak sığır gübresi (SG) kullanmaktadır. Yapılan araştırmalara göre SG’nin biyogaz verimi literatürdeki verimlerinden oldukça düşük değerde (50-100 ml/g uçucu katı (UKSG)) çıkmaktadır. Bu nedenle SG’nin verimini artırmaya yönelik olan bu çalışma yapılmıştır. Bu bağlamda SG’nin biyogaz verimi laboratuvar ölçekli 5L’lik bir reaktörde endüstriyel reaktörlerin en çok kullandığı çalışma sıcaklığında (35 °C) test edilmiştir. Bu reaktör kontrol reaktörü olarak belirlendikten sonra çözünür karbonhidrat, protein ve yağlardan arınmış ve çoğunlukla lignoselülozik içeren reaktör kalıntısına %4 m/m NaOH ön işlemi ve sonrasında katalitik metallerden olan nikel (Ni) ve kobalt (Co) farklı konsantrasyonlarda (50, 100 ve 150 µg/toplam katı SG) eklenmiştir. Bu sayede kontrol reaktörüne kıyasla, bu metallerin belirli konsantrasyonun eklenmesi ile hidrojenotrofik aktiviteyi uyarabilen ve biyogaz üretimini daha da artırabilen bir sonuçla (%36 - 47) karşılaşılmıştır. En iyi Ni ve Co konsantrasyonu için SG’nin en yüksek biyogaz verimi toplam 509,5 ± 19,9 ml/g UK olmuştur.

Keywords

• Biyogaz
• endüstriyel reaktörler
• iz elementler
• Nikel
• Kobalt

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