| 乙酸/丙酸作为EBPR碳源的动力学模型研究(Ⅲ)——模型的应用 |
| 摘要点击 2035 全文点击 1771 投稿时间：2012-06-01 修订日期：2012-08-16 |
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| 中文关键词 聚磷菌 聚糖菌 动力学模拟 竞争 优势菌属 |
| 英文关键词 phosphorus accumulating organisms (PAO) glycogen accumulating organisms (GAO) kinetic simulation competition predominance biomass |
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| 中文摘要 |
| 采用基于SCFAs代谢的动力学模型,模拟了不同碳源类型和不同m(P)/m(COD)对聚磷菌(PAO)和聚糖菌(GAO)竞争的影响. 结果表明,以乙酸作为唯一碳源时,EBPR中的微生物种群结构基本保持反应器初始状态的生物组成,PAO或GAO都无法取得明显的竞争优势. 但是,在进水中添加丙酸有利于PAO成为优势微生物,当丙酸占总酸的质量分数达到33%以上时,EBPR趋于稳定. 当m(P)/m(COD)<0.01时,即使丙酸作为EBPR的碳源,GAO仍占(PAO+GAO)总量的95%以上. 为了使PAO占有优势,进水m(P)/m(COD)应该控制在0.04~0.10之间. |
| 英文摘要 |
| The kinetic model based on SCFAs metabolism was applied for the prediction of phosphorus-and glycogen-accumulating organisms (PAO and GAO) competition with different carbon sources and m(P)/m(COD) ratios. When acetic acid was used as the sole carbon source, the biomass compositions were almost the same as those before cultivation, and neither PAO nor GAO could be out-competed from EBPR. However, increasing propionic acid in the influent helped PAO to be the predominance organism, and EBPR performance kept excellent when the ratio of propionate to mixed acids (acetate+propionate) was higher than 0.33. It also found that the m(P)/m(COD) ratio should be kept at 0.04-0.10 to avoid phosphorus became a limiting factor for PAO growth. This was because at low m(P)/m(COD) ratios, such as 0.01, GAO would take up 95% of the total (PAO+GAO) biomass. |
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