| 基于OUR-HPR测量在线估计活性污泥合成PHA量 |
| 摘要点击 1930 全文点击 1310 投稿时间：2014-10-14 修订日期：2014-12-21 |
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| 中文关键词 聚羟基烷酸酯(PHA) 活性污泥 同时储存生长-溶解性微生物产物模型 氧利用速率-氢离子产生速率 预测 |
| 英文关键词 PHA activated sludge SSAG-SMP OUR-HPR estimation |
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| 中文摘要 |
| 活性污泥工艺是一种具有重要应用前景的工业化生产聚羟基烷酸酯(PHA)的方法. 当前PHA测量主要采用离线分析方法,时间滞后、分析操作复杂, 不适于PHA生产过程控制. 本研究基于活性污泥同时储存生长-溶解性微生物产物模型(SSAG-SMP),认为在饱食(外部有机碳基质充足)期间,聚羟基烷酸酯(PHA)的合成速率与氧利用速率(OUR)及氢离子产生速率(HPR)呈线性关系,建立了一种基于OUR-HPR在线测量数据估计活性污泥合成PHA量的方法. 本研究对乙酸作基质的不同浓度情况进行模拟,结果表明OUR及HPR的 PHA合成的氧气消耗分数 (kPHA,OUR)和质子消耗分数 (kPHA,HPR)为常数,分别是0.67和0.57. 利用建立的线性关系来预测饱食期PHA含量,结果显示预测值与实测值较为吻合,说明提出的基于OUR-HPR测量在线估计PHA合成量的方法可行. |
| 英文摘要 |
| Activated sludge process is an important approach for industrial Polyhydroxyalkanoate (PHA) production. Off-line measurement with a time lag and complex analysis, is a common method for PHA, but is not suitable for the process control of PHA production. Based on a model for simultaneous storage and growth-soluble microbial products (SSAG-SMP), it is assumed that there is the linear relationship between the PHA synthesized and OUR or HPR, respectively. Further, a novel method to estimate PHA content based on in-situ monitoring data of oxygen uptake rate (OUR) and hydrogen-ion production rate (HPR) is established in this paper. The results of modeling OUR and HPR under different substrate concentrations showed that oxygen consumption proportion (kPHA, OUR) and proton consumption proportion (kPHA, HPR) of PHA synthesis were 0.67 and 0.57, respectively. The predicted results based on the linear relationship were essentially consistent with measured ones, and indicated that the method is feasible. |
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