Yan S, Tyagi R D, Surampalli R Y
INRS Eau, Terre et Environnement, 490, rue de la Couronne, Quebec, G1K 9A9, Canada.
Water Sci Technol. 2006;53(6):175-80. doi: 10.2166/wst.2006.193.
Activated sludge from different full-scale wastewater treatment plants (municipal, pulp and paper industry, starch manufacturing and cheese manufacturing wastewaters) was used as a source of microorganisms to produce biodegradable plastics in shake flask experiments. Acetate, glucose and different wastewaters were used as carbon sources. Pulp and paper wastewater sludge was found to accumulate maximum concentration (43% of dry weight of suspended solids) of polyhydroxy alkanoates (PHA) with acetate as carbon source. Among the different wastewaters tested as a source of carbon, pulp and paper industry and starch industry wastewaters were found to be the best source of carbon while employing pulp and paper activated sludge for maximum accumulation of PHA. High concentration of volatile fatty acids in these wastewaters was the probable reason.
在摇瓶实验中，取自不同规模污水处理厂（城市污水、制浆造纸工业废水、淀粉制造废水和奶酪制造废水）的活性污泥被用作微生物来源以生产可生物降解塑料。乙酸盐、葡萄糖和不同的废水被用作碳源。发现以乙酸盐作为碳源时，制浆造纸废水污泥积累的聚羟基脂肪酸酯（PHA）浓度最高（占悬浮固体干重的43%）。在作为碳源测试的不同废水当中，发现制浆造纸工业废水和淀粉工业废水是最佳碳源，同时采用制浆造纸活性污泥可实现PHA的最大积累。这些废水中高浓度的挥发性脂肪酸可能是原因所在。
