Determination of optimum operating conditions for production of polyhydroxybutyrate by activated sludge submitted to dynamic feeding regime
文献类型：期刊论文
| 作者 | Qu Bo ; Liu JunXin |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2009-01 |
| 卷号 | 54期号:1页码:142-149 |
| 关键词 | polyhydroxybutyrate activated sludge dynamic feeding regime optimum operating conditions |
| 中文摘要 | Polyhydroxybutyrate (PHB) was produced by activated sludge in a two-stage process. In the first stage, the sludge with high storage potential was enriched in a sequencing batch reactor (SBR) operated by a dynamic feeding regime. The biosynthesis of PHB was sequentially accomplished in a batch reactor in the second stage. This article focused on the optimization of PHB content by evaluating the effects of three critical factors: Dissolved oxygen, pH and food-to-microorganism (F/M) ratio in the batch reactor. The results showed that the rate of substrate uptake, as well as the yield and content of PHB increased with the increase of dissolved oxygen concentration. The control of pH was not necessary under the weak alkaline condition for improvement of PHB content, except for the case in which the pH value was out of rang of 7.0 to 10.0. The enhanced F/M ratio favored PHB accumulation in the range of 1.0 to 4.5 C-mmol/C-mmol and the highest PHB content, 64%, was achieved at 4.5 C-mmol/C-mmol. When F/M ratio was enhanced to 6.0 C-mmol/C-mmol, the phenomenon of utilizing simultaneously intracellular PHB and external substrate by sludge was observed, which resulted in a sharp decrease of PHB content. The microscopic observation clearly confirmed that dynamic feeding regime was effective for selecting and enriching the sludge with a high storage potential. |
| WOS记录号 | WOS:000263128300020 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21662]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qu Bo,Liu JunXin. Determination of optimum operating conditions for production of polyhydroxybutyrate by activated sludge submitted to dynamic feeding regime[J]. CHINESE SCIENCE BULLETIN,2009,54(1):142-149. |
| APA | Qu Bo,&Liu JunXin.(2009).Determination of optimum operating conditions for production of polyhydroxybutyrate by activated sludge submitted to dynamic feeding regime.CHINESE SCIENCE BULLETIN,54(1),142-149. |
| MLA | Qu Bo,et al."Determination of optimum operating conditions for production of polyhydroxybutyrate by activated sludge submitted to dynamic feeding regime".CHINESE SCIENCE BULLETIN 54.1(2009):142-149. |
入库方式： OAI收割
来源：生态环境研究中心
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