Abstract:
:This study evaluates the potential for using different effluents for simultaneous H(2) and CH(4) production in a two-stage batch fermentation process with mixed microflora. An appreciable amount of H(2) was produced from parboiled rice wastewater (23.9 mL g(-1) chemical oxygen demand [COD]) and vinasse (20.8 mL g(-1) COD), while other effluents supported CH(4) generation. The amount of CH(4) produced was minimum for sewage (46.3 mL g(-1) COD), followed by parboiled rice wastewater (115.5 mL g(-1) COD) and glycerol (180.1 mL g(-1) COD). The maximum amount of CH(4) was observed for vinasse (255.4 mL g(-1) COD). The total energy recovery from vinasse (10.4 kJ g(-1) COD) corresponded to the maximum COD reduction (74.7 %), followed by glycerol (70.38 %, 7.20 kJ g(-1) COD), parboiled rice wastewater (63.91 %, 4.92 kJ g(-1) COD), and sewage (51.11 %, 1.85 kJ g(-1) COD). The relatively high performance of vinasse in such comparisons could be attributed to the elevated concentrations of macronutrients contained in raw vinasse. The observations are based on kinetic parameters of H(2) and CH(4) production and global energy recovery of the process. These observations collectively suggest that organic-rich effluents can be deployed for energy recovery with sequential generation of H(2) and CH(4).
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Peixoto G,Pantoja-Filho JL,Agnelli JA,Barboza M,Zaiat Mdoi
10.1007/s12010-012-9807-4subject
Has Abstractpub_date
2012-10-01 00:00:00pages
651-71issue
3eissn
0273-2289issn
1559-0291journal_volume
168pub_type
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