Substrate concentration‐independent aerobic granulation in sequential aerobic sludge blanket reactor
Substrate concentration‐independent aerobic granulation in sequential aerobic sludge blanket reactor
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DOI：
10.1080/09593330309385665
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发表时间：
2003-10
影响因子：
2.8
通讯作者：
Q. Liu;Joo-Hwa Tay;Yu Liu
中科院分区：
文献类型：
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作者：
Q. Liu;Joo-Hwa Tay;Yu Liu
在4个柱式序贯好氧污泥床反应器中，研究了投加不同基质浓度的好氧颗粒污泥的发育规律，进水浓度范围为L、−、1COD。结果表明，在所有投加不同底物浓度的反应器中均能成功形成好氧颗粒污泥，说明好氧颗粒污泥的形成与底物浓度无关。对培养好氧颗粒的颗粒大小、圆度、致密性、物理强度以及细胞表面疏水性和细胞多糖含量进行了研究。结果表明，不同底物浓度形成的好氧颗粒具有相似的圆度和致密性。但好氧颗粒大小随底物浓度的增加而略有增大，而颗粒强度随底物浓度的增加而减小。结果表明，与接种污泥相比，好氧颗粒污泥的细胞表面疏水性和细胞多糖含量显著增加。较高的细胞表面疏水性和较高的细胞多糖含量对好氧颗粒的形成起着重要作用。然而，底物浓度似乎不是好氧颗粒形成的控制因素。本研究结果对好氧颗粒化生物反应器的开发和好氧颗粒化机理的研究具有一定的参考价值。研究还表明，好氧颗粒生物反应器在处理高浓度废水方面具有很大的潜力。
Abstract The development of aerobic granules was studied in four column‐type sequential aerobic sludge blanket reactors fed with different substrate concentrations ranging from 500 to 3000 mg l−1 COD. Results showed that aerobic granules successfully formed in all reactors fed with different substrate concentrations, indicating that the formation of aerobic granules is independent of the substrate concentration. The granule size, roundness, compactness, physical strength, as well as cell surface hydrophobicity and cell polysaccharides contents of the cultivated aerobic granules were investigated. It was shown that aerobic granules formed with different substrate concentrations had similar roundness and compactness. However, the size of aerobic granules slightly increased with an increase in substrate concentration, while granule strength decreased with substrate concentration. It was found that there was a significant increase in cell surface hydrophobicity and cell polysaccharides of the aerobic granules compared to that of seed sludge. The high cell surface hydrophobicity and high cell polysaccharides contents were believed to play an important role in the formation of aerobic granules. However, substrate concentration seems not to be a governing factor for the formation of aerobic granules. The results of this study would be useful for developing aerobic granules‐based bioreactor and for better understanding of the mechanism of aerobic granulation. It was also clearly demonstrated that aerobic granules‐based bioreactor would have great potential in the treatment of high‐strength wastewater.