不同ORP下活性污泥合成聚羟基烷酸酯的研究  

Synthesis of Polyhydroxyalkanoates by Activated Sludge under Various ORP

作　　者：蔡萌萌[1] 蔡宏[2] 胡文锋[3] 单羿[2] 赵庆良[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]香港理工大学土木与结构工程系,香港 [3]华南农业大学食品学院,广东广州510642

出　　处：《中国给水排水》2008年第11期8-11,共4页China Water & Wastewater

摘　　要：分析了不同氧化还原电位(ORP)下,以葡萄糖作碳源时利用活性污泥合成聚羟基烷酸酯(PHAs)的产量和组分。通过调节氧气或氮气的流量,使ORP分别控制在-20、-10、0和10mV,进而控制培养液中的溶解氧(DO)浓度。结果显示,随着ORP的提高,PHAs的合成速率、细胞生长率、葡萄糖降解率均增加,而PHAs中3-羟基戊酸(3HV)与3-羟基丁酸(3HB)的比值下降。因此,当以葡萄糖为碳源时,DO是活性污泥合成PHAs的重要影响因素。Under various oxidation-reduction potentials （ORP）, an analysis was made on the production and composition of polyhydroxyalkanoates （PHAs） synthesized by activated sludge when using glucose as carbon source. In order to control the dissolved oxygen （DO） concentration in the culture medium, the flow rate of oxygen or nitrogen is adjusted to keep the ORP at -20 mV, - 10 mV, 0 mV and 10 mV, respectively. The results show that with ORP increasing, PHAs yield, production rate, cell growth rate and glucose consumption rate increase correspondingly, however, the mole ratio of 3-hydroxy-valerate （3HV） to 3-hydroxybutyrate （3HB） declines. Therefore, DO plays an important role to affect the synthesis of PHAs by activated sludge when using glucose as carbon source.

关 键 词：活性污泥 葡萄糖 ORP 聚羟基烷酸酯 

分 类 号：X703[环境科学与工程—环境工程]