抄録
Cultivation conditions ofPseudomonas vesicularisvar.povalolyticus PH, a PVA degrading bacteria, were investigated in order to study its application to waste water treatment. The optimum pH and temperature for both growth and PVA degradation of PH strain were determined to be 7.0-7.5 and 30-35°C respectively. However, effective PVA degradation was also observed at 37.5°C. PH strain grew well in proportion to the PVA concentration within 500-2000mg/l range. PH strain was also able to utilize glucose, pyruvic acid, fructoligosaccharide, and glutamic acid as sole carbon sources. Particulaly, high PVA degrading activity was shown when grown on glutamic acid, pyruvic acid or complex media. Magnesium or calcium was the key mineral for the growth of PH strain. Especially Magnesium had high ability to promote good growth. If symbiotic bacteria coexisted with PH strain, it could grow on PVA without any growth factors.
