Briese B H, Jendrossek D, Schlegel H G
Institut für Mikrobiologie, Georg-August Universität Göttingen, FRG.
FEMS Microbiol Lett. 1994 Mar 15;117(1):107-11. doi: 10.1111/j.1574-6968.1994.tb06750.x.
The degradation of sheets of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (BIOPOL) by aerobic sewage sludge was analyzed. Degradation of the polymer was highly dependent on the pH of the culture medium and was maximal between pH 7 and pH 8.5. Below pH 6 and above pH 9 the degradation rate was very low. Agitation of the culture fluid had relatively little influence on the rates of degradation. 1.2 x 10(5) aerobic polymer-degrading bacteria per ml sewage sludge were identified by halo formation on solid poly(3-hydroxybutyrate) (PHB)-containing media. The number of PHB-degrading bacteria in other ecosystems amounted to 3.8 x 10(3) per ml sludge of a fresh-water lake, 9.2 x 10(5) per g garden-soil, 1.3 x 10(6) per g field-soil and 4.3 x 10(6) per g compost.
分析了好氧污水污泥对聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（BIOPOL）片材的降解情况。聚合物的降解高度依赖于培养基的pH值，在pH 7至pH 8.5之间降解程度最大。在pH 6以下和pH 9以上时，降解速率非常低。培养液的搅拌对降解速率的影响相对较小。通过在含固体聚（3-羟基丁酸酯）（PHB）的培养基上形成晕圈，确定每毫升污水污泥中有1.2×10⁵个好氧聚合物降解细菌。在其他生态系统中，每毫升淡水湖污泥中PHB降解细菌的数量为3.8×10³个，每克花园土壤中为9.2×10⁵个，每克田间土壤中为1.3×10⁶个，每克堆肥中为4.3×10⁶个。
