Two stage anaerobic baffled reactors for bio-hydrogen production from municipal food waste

Abstract: A two-step anaerobic baffled reactor (ABR-1 and ABR-2) for H2 production from municipal food waste (MFW) was investigated at a temperature of 26°C. In ABR-1, the average yield of H2 at an HRT of 26h and OLR of 58kg COD/m3 d was 250ml H2/g VS removed. As unexpected; the H2 production in the ABR-2 was further increased up to 370ml H2/gVS removed at a HRT of 26h and OLR of 35 kgCOD/m3 d. The total H2 yield in the two-step process was estimated to be 4.9mol H2/mol hexose. The major part of H2 production in the ABR-1 was due to the conversion of CODparticulate (36%). In the ABR-2 the H2 yield was mainly due to the conversion of COD in the soluble form (76%). Based on these results MFW could be ideal substrate for H2 production in a two-step ABR processes. [Copyright &y& Elsevier]