Back to Search
Start Over
Karanlık fermentasyon ile patates besi ortamından biyohidrojen üretimi için uygun işletim koşullarının belirlenmesi ve kinetik analizi.
- Source :
-
Journal of the Faculty of Engineering & Architecture of Gazi University / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, . 2018, Vol. 2018 Issue 18, Part 1, p1-25. 25p. - Publication Year :
- 2018
-
Abstract
- In this work, effects of agitation speed, inoculum ratio, initial substrate concentraion and incubation temperature were investigated for anaerobic biohydrogen production. The most suitable parameters were determined as agitation speed 200 rpm (0 - 200 rpm), microorganism inoculum ratio 1:10 v/v (1:10 - 1:200 v/v), initial substrate concentration 32.4 g COD/L (10.8- 32.4 g COD/L) and temperature 37°C (28-37°C). Under these conditions, 1257 mL H2 production, 17.06 mL H2/g KOI yield and 6.441 mL H2/L maximum H2 production rate had been reached. In the case of an incubation temperature of 37°C, the lag phase was observed to be approximately 6.5 h independent of the initial substrate concentration. The relationship between substrate concentration and product formation was evaluated as reaction order of 1 for elementary reaction rate model, reaction rate constants were calculated as 6.5x10-5 min-1 and 7.92x10-5 min-1 for temperatures of 28°C and 37°C, respectively. Arrhenius model parameters, frequency factor and activation energy were calculated as 9.74x1034 min-1 and 229.20 kJ/mol respectively. Maximum H2 production rates, Michaelis constants (KS) and R2 values were calculated as 11.47 mL H2/L.min, 74.66 mL H2/L.min, 181.9 g COD/L, 447.7 g COD/L and 0.9458, 0.9505 for 28°C and 37°C temperatures, respectively. Using modified Gompertz model, all R2 values were obtained greater than 0.99, maximum H2 production potentials were found as 2.126 L H2/L, 2.777 L H2/L at 28°C and 37°C with 32.4 g COD/L, respectively. Maximum H2 production rate was reached as 15.250 mL H2/L.min at 37°C and 27 g COD/L initial substrate concentration. [ABSTRACT FROM AUTHOR]
Details
- Language :
- Turkish
- ISSN :
- 13001884
- Volume :
- 2018
- Issue :
- 18, Part 1
- Database :
- Academic Search Index
- Journal :
- Journal of the Faculty of Engineering & Architecture of Gazi University / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi,
- Publication Type :
- Academic Journal
- Accession number :
- 132068178
- Full Text :
- https://doi.org/10.17341/gazimmfd.416444