Abstract
In the past, there has been little study on the thermophilic treatment of anaerobic fixed-bed reactor. The authors have verified that high performance was obtained by application of this treatment process to the waste water containing high soluble COD.
The authors conducted the experiment on the thermophilic treatment of waste alcoholic drink (107 kg COD·m-3) using anaerobic fixed-bed reactor containing porous ceramics filling, and found that higher COD removal (>97%) with substrate removal rate (γs) of 60 kg COD·m-3· d-1 was obtained by addition of very small amount of heavy metals (Fe, Ni, Co) to the reactor. Dependency of the over all reaction rate on the substrate can not be expressed by Monod equation, but can be expressed by Moser equation which reprenents a sigmoid-type relationship between substrate concentratitn (S) and γs on condition that there is no change in the biomass in the reactor.
Some problems to be solved are remained, but the results are very suggestive to the study of reaction mechanism or microbe metabolism of anaerobic treatment.
