首页> 外文学位 >Producing Biodegradable Plastics Using Activated-Sludge Polyhydroxyalkanoates in Mixed Composition.
【24h】

Producing Biodegradable Plastics Using Activated-Sludge Polyhydroxyalkanoates in Mixed Composition.

机译:使用混合组合物中的活性污泥聚羟基链烷酸酯生产可生物降解的塑料。

获取原文
获取原文并翻译 | 示例

摘要

Polyhydroxyalkanoates (PHAs) production from mixed culture was investigated under non-sterile conditions. Activated sludge from a municipal wastewater treatment plant was inoculated in two bioreactors under aerobic conditions. One of the sequencing batch reactors (SBRs) was run under unbalanced feast-famine (F/F) regime and the other, control reactor (balanced/balanced) (B/B), was subjected to a heavy feeding. A mixture composed of four different organic acids was used as feedstock in both bioreactors. Acetic acid, proponic acid, and octanoate were consumed faster in the F/F reactor than in the B/B reactor during the cycle. During 12-hour cycles, maximum PHA production was 2.11 mg in the F/F reactor with a Hydraulic Retention Time (HRT) = Solid Retention Time (SRT) = 4 days. In contrast, 0.287 mg PHA was accumulated in the B/B reactor with a HRT = 1 day and SRT = 2 days. PHA conversion yield was calculated by dividing the carbon consumption of feedstock in the reactor to the carbon production as PHA in biomass. 20.7% of the carbon from organic acids is used to synthesize PHA in the F/F reactor.
机译:在非无菌条件下研究了混合培养物中的聚羟基链烷酸酯(PHA)生产。将来自市政废水处理厂的活性污泥接种在两个有氧条件下的生物反应器中。其中一个测序间歇反应器(SBR)在不平衡的饱餐(F / F)体制下运行,另一个控制反应器(平衡/平衡)(B / B)则需要大量加料。在两种生物反应器中均使用由四种不同有机酸组成的混合物作为原料。在循环过程中,F / F反应器中的乙酸,丙酸和辛酸酯消耗速度比B / B反应器快。在12小时的循环中,F / F反应器中的最大PHA产量为2.11 mg,水力保留时间(HRT)=固体保留时间(SRT)= 4天。相反,在B / B反应器中积累了0.287 mg PHA,HRT = 1天,SRT = 2天。通过将反应器中原料的碳消耗除以作为生物质中PHA的碳产量来计算PHA转化率。来自有机酸的20.7%的碳用于在F / F反应器中合成PHA。

著录项

  • 作者

    Tuna, Eda.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Engineering Environmental.
  • 学位 M.S.
  • 年度 2012
  • 页码 46 p.
  • 总页数 46
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号