Production of polyhydroxyalkanoates by activated sludge: Correlation with extracellular polymeric substances and characteristics of activated sludge
Production of polyhydroxyalkanoates by activated sludge: Correlation with extracellular polymeric substances and characteristics of activated sludge
复制标题
活性污泥法生产聚羟基脂肪酸酯：与细胞外聚合物和活性污泥特性的相关性
DOI：
10.1016/j.cej.2018.12.066
复制
发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Y. Wang
中科院分区：
文献类型：
--
作者：
H. Li;J. Zhang;L. Shen;Z. Chen;Y. Zhang;C. Zhang;Q. Li;Y. Wang
为了从污泥特性的角度更好地了解PHAs的积累过程，研究了不同碳源（如：NH 4+、N乙酸盐、丙酸盐和混合碳）。在序批式生物反应器中，以乙酸钠为碳源的污泥PHAs合成效率上级优于以丙酸钠为碳源和混合碳源的污泥PHAs合成效率，而EPS和污泥特性在各碳源下的变化趋势相似。不同碳源的相关性没有显著差异。聚羟基丁酸酯（PHB）与MLSS（R = 0.782）和污泥絮体尺寸（R =-0.58）具有良好的相关性。在以丙酸盐和混合碳源为碳源的反应器中，多羟基戊酸盐（PHV）和PHBV与MLSS（R分别为0.480和0.489）、污泥絮体尺寸（R分别为-0.921和-0.666）和多糖浓度（R分别为0.726和0.557）相关。根据相关性分析，提高污泥浓度、促进胞外聚合物（EPS）的产生和减小污泥絮体粒径是PHAs进一步积累的有效途径。本研究首次系统地建立了EPS、活性污泥特性与PHAs积累之间的相关性，可为活性污泥生产PHAs的工程设计和运行参数选择提供理论依据。
To understand PHAs accumulation process well in the stand point of the sludge characteristics, polyhydroxyalkanoates (PHAs) accumulation by activated sludge was investigated in correlation with sludge properties, such as particle size, mixed liquor suspended solids (MLSS) and extracellular polymeric substances (EPS) under different carbon sources (e.g., acetate, propionate and mixed carbons) at 2, 4, 6 and 8 g/L. The efficiency of PHAs synthesis from sludge with sodium acetate as carbon source was superior to that with sodium propionate as carbon source and mixed carbon sources in the sequencing biological reactors, while EPS and sludge characteristics showed similar trends for each carbon source. Various carbon sources did not induce significant differences in the correlations. Polyhydroxybutyrate (PHB) showed good correlation with MLSS (R = 0.782) and sludge floc size (R = −0.58). In the reactors with carbon sources of propionate and mixed carbons, polyhydroxyvalerate (PHV) and PHBV correlated with MLSS (R = 0.480 and 0.489, respectively), sludge floc size (R = −0.921 and −0.666, respectively) and concentrations of polysaccharides (R = 0.726, 0.557, respectively). According to the correlations, improving the concentration of sludge, promoting the production of extracellular polymeric substances (EPS) and decreasing the sludge floc size were supposed to be effective approaches for further accumulation of the PHAs. This study is the first to systematically establish the correlations among EPS, characteristics of activated sludge and PHAs accumulation, can provide a theoretical foundation for the engineering design and the operational parameters selection of PHAs production by activated sludge.
登录
查看更多内容
影响因子：
12.8
作者：
Helena Moralejo-Gárate;R. Kleerebezem;A. Mosquera-Corral;M. V. van Loosdrecht
通讯作者：
Helena Moralejo-Gárate;R. Kleerebezem;A. Mosquera-Corral;M. V. van Loosdrecht
DOI：
10.2166/wst.2011.849
发表时间：
2011-12
期刊：
Water science and technology : a journal of the International Association on Water Pollution Research
影响因子：
--
作者：
G. A. Ehlers;D. Wagachchi;S. Turner
通讯作者：
G. A. Ehlers;D. Wagachchi;S. Turner
影响因子：
9.5
作者：
Rosenberger, S;Evenblij, H;Laabs, C
通讯作者：
Laabs, C
影响因子：
11.4
作者：
Yuanpeng Wang;J. Cai;Jianghuang Lan;Zhenggui Liu;N. He;Liang Shen;Qingbiao Li
通讯作者：
Yuanpeng Wang;J. Cai;Jianghuang Lan;Zhenggui Liu;N. He;Liang Shen;Qingbiao Li
DOI：
10.1016/j.cep.2006.10.012
发表时间：
2007-12
期刊：
--
影响因子：
--
作者：
C. Coufort;D. Bouyer;A. Liné;B. Haut
通讯作者：
C. Coufort;D. Bouyer;A. Liné;B. Haut