化工学报 ›› 2007, Vol. 58 ›› Issue (10): 2427-2431.

• 综述与专论 • 上一篇    下一篇

活性污泥合成PHAs单体组分的调控方法

蔡萌萌;蔡宏;单羿;王玉洁;何丹;赵庆良   

  1. 哈尔滨工业大学
  • 出版日期:2007-10-05 发布日期:2007-10-05

Process manipulations methods for composition regulation of polyhydroxyalkanoates synthesized by activated sludge

  • Online:2007-10-05 Published:2007-10-05

摘要:

聚羟基烷酸酯(PHAs)是一类生物合成的环境友好高分子塑料,具有广泛应用前景。活性污泥合成PHAs可降低PHAs生产成本,实现废物资源化。PHAs的物化性质取决于其单体组分的结构和含量。基于优化PHAs产量的工艺研究,总结了调控活性污泥合成的聚羟基丁酸羟基戊酸(PHBV)中羟基戊酰含量的工艺措施和生化原理。已有研究表明,好氧时,碳源类型决定PHBV中的单体组分;一般地,溶解氧浓度(DO)降低,PHBV中HV含量会增加;污泥来源、pH值以及碳源与氮磷浓度比的变化都会影响HV含量;各参数对PHAs组分的影响存在关联性。展望了调控活性污泥合成PHAs中单体组分的进一步研究方向。

关键词:

活性污泥, 聚羟基烷酸酯, 工艺条件控制, 代谢途径, 聚合物组分

Abstract:

Polyhydroxyalkanoates(PHAs)are environmentalfriendly biothermoplastics with the potential of wide applicationPHAs synthesis by activated sludge is costsaving and beneficial for waste recycleThe monomer composition and content of PHAs determine the physicochemical characteristics of the polymerBased on the technology of optimizing PHAs production,the process manipulation and biochemical metabolism for regulating the hydroxyvaleryl content in poly(3hydroxybutyrateco3hydroxyvalerat(PHBV)by activated sludge were summarizedLiterature review indicated that under aerobic condition the nature of carbon substrate was crucial to the final composition of PHBVGenerally,decrease of dissolved oxygen concentration(DO)led to hydroxyvaleryl [JP2]content enhancement,and variation of sludge source,pH and carbon to nitrogen and/or phosphorus ratio all tended to alter hydroxyvaleryl content.The effects of the above parameters on hydroxyvaleryl content were interrelated with each otherFurther research to regulate the composition of PHAs from activated sludge was forecasted.

Key words:

活性污泥, 聚羟基烷酸酯, 工艺条件控制, 代谢途径, 聚合物组分