摘要
PHA是一种生物可降解塑料,可从污水有机物中合成。文章在简要说明现阶段工业生产PHA情况的基础上,总结了利用混合菌种活性污泥法从污水有机物中合成PHA的优点。重点对两种从污水中生产PHA工艺——厌氧-好氧活性污泥工艺和好氧瞬时供料工艺进行了介绍,并给出了相应工艺流程。通过使用廉价的有机底物可以使PHA的生产价格降低到原来的一半,大约为每公斤4欧元左右。文章还讨论了控制工艺运行条件对PHA合成的重要性,并说明了不同底物组成对合成PHA性质的影响。
Polyhydroxyalkanotes （PHA） are biodegradable plastics which can be converted from wastewater organics. In this article the situation of PHA production of large scale is described, and the advantages of PHA production using mixed cultures and activated sludge are summarized. Two PHA production processes from wastewater, anaerobic-aerobic activated sludge process and aerobic transient feeding process are presented in this article. With cheap organic substrate being used the price of PHA production is 4 ε/kg, which is just about half of the previous price. The importance of process operating conditions for PHA production is discussed. Finally the influences of different substrates on the characteristics of synthesized PHA are also mentioned.
出处
《生态环境》
CSCD
北大核心
2005年第6期967-971,共5页
Ecology and Environmnet
基金
国家建设部2005年科学技术项目(05-K2-8)
北京市教育委员会科技发展计划重点项目(KZ200410016017)
北京市留学人员科技活动择优资助项目(2005)
