The selection of materials for an anaerobic bioreactor is one of the most important issues in design. But, so far no sufficient study has been made yet on this subject. This report presents the findings from the experiments the authors carried out on such materials as various types of metals and concretes for possible use in an anaerobic bioreactor. In the experiments, materials were tested with high-concentration wastewater from kraft pulp mill in a thermophilic, anaerobic digestio n vessel. The system used consisted of pretreatment equipment, an anaerobic bioreactor for methane fermentation, a membrane module unit and a gas treatment system.
The experiment revealed that: 1) stainless steels and alminum had a good corrosion resistance, but cast iron (FC 20) showed less corrosion resistance and 2) silica fume mixed concrete indicate a good corrosion resistance.
