Stable aerobic granules for continuous-flow reactors: Precipitating calcium and iron salts in granular interiors

Juang, Yu-Chuan; Adav, Sunil S.; Lee, Dong Hoon; Tay, Joo‐Hwa

doi:10.1016/j.biortech.2010.05.078

Cited by 106 publications

(38 citation statements)

References 31 publications

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“…Indeed, it is believed that the ideal conditions for aerobic granulation like the succession of feast/famine conditions (Val del Río et al, 2012), the hydraulic selection pressure (Adav et al, 2009) and the hydraulic shear forces (Zhou et al, 2014), occur or could be easily controlled in SBR reactors. Nevertheless, SBRs are difficult to implement for a large sewage treatment, where continuous-flow reactors are normally favorable due to the lower installation costs and easier operation, maintenance and control (Juang et al, 2010). Moreover, up to date the most of biological granular sludge systems have been studied in column-type reactors.…”

mentioning

confidence: 99%

Study of aerobic granular sludge stability in a continuous-flow membrane bioreactor

Corsino

Campo

Bella

et al. 2016

Bioresource Technology

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mentioning

confidence: 99%

Study of aerobic granular sludge stability in a continuous-flow membrane bioreactor

Corsino

Campo

Bella

et al. 2016

Bioresource Technology

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“…In addition, it has been evidenced that inorganic precipitates in granular sludge could improve the structure stability and strength of aerobic granules [4][5][6]. Meanwhile, however, a very high ash content in aerobic granules up to 50-84% [7,12] was reported at some circumstances, in which calcium, magnesium, or iron precipitation was observed [14][15][16].Although these metal precipitates in granules are favourable in terms of granule structure and stability, the negative impact was also reported.…”

Section: +mentioning

confidence: 99%

“…Juang et al [15] reported both calcium and iron precipitates while Zhou et al [16] observed both calcium and magnesium precipitation in aerobic granules. However, in this study, only calcium carbonate was formed at studied conditions with magnesium and iron at very low concentration as shown in Table 1.…”

Section: Element Distribution In Granules With Different Sizes and MImentioning

confidence: 99%

Size-dependent calcium carbonate precipitation induced microbiologically in aerobic granules

Liu

Lan

Zeng

2016

Chemical Engineering Journal

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Calcium and ash accumulation in aerobic granules treating organic wastewater was investigated systematically in this study. It was found that ash content of granular sludge reached 43% at stable state of reactor operation with calcium carbonate precipitation as the main cause. Since granular sludge in the reactor at the steady state was the mixture of granules with different sizes, granules in the reactor on operation days 90, 120 and 150, respectively, were sorted into 10 categories by size to study the inorganic substances. It was found that calcium was selectively enriched in granules and the precipitation of calcium carbonate was just dependent on granule size instead of operation duration at the steady state. More calcium carbonate was precipitated in bigger aerobic granules, but both calcium and ash contents reached stable values when granule size was bigger than 700μm. Analysis by X-ray Diffractometer disclosed that aragonite was the only polymorph of calcium carbonate detected in aerobic granules with size bigger than 300μm. Scanning electron microscope revealed clearly for the first time that bundles of needle shaped aragonite was embedded in extracellular polymeric substances of aerobic granules. A mechanism on calcium carbonate precipitation was proposed to deepen the understanding of biomineralization.

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“…However, precipitates may form within the granule core (Lee and Chen, 2015;Mañas et al, 2012) and significantly increase the granule density up to 1,300 kg m -3 (Juang et al, 2010;Winkler et al, 2013).…”

Section: Density Measurementsmentioning

confidence: 99%

Experimental Methods in Wastewater Treatment

Loosdrecht¹,

Nielsen²,

López-Vázquez³

et al. 2016

Water Intelligence Online

143

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PrefaceWastewater treatment is a core technology for water resources protection and reuse, as is clearly demonstrated by the great success of its consequent implementation in many countries worldwide. During the last decennia scientific research has made vast progress in understanding the complex and interdisciplinary aspects of the biological, biochemical, chemical and mechanical processes involved. It can be concluded that the global application of existing knowledge and experience in wastewater treatment technology will represent a cornerstone in future water management, as expressed in the Strategic Development Goals accepted by the UN in September 2015.Only about one fifth of the wastewater produced globally is currently being adequately treated. To achieve the goal for sustainable water management by 2030 would require extra wastewater treatment facilities for about 600,000 people each day. I am convinced that this book will make its own significant contribution to meeting this ambitious goal.In the near future, most of the global population will live in cities and in low and middle-income countries, where most wastewater is not adequately treated. Probably the most limiting factor in achieving the goals for sustainable water management is the lack of qualified, well-trained professionals, able to comprehend the scientific research results and transfer them into practice. It is therefore of prime importance to make currently available scientific advances and proven experiences in wastewater treatment technology applications easily accessible worldwide. This was one of the drivers for the development of this book, which represents an innovative contribution to help overcome such a capacity development challenge. The book is most definitely expected to contribute to bridging the gaps between the science and technology, and their practical applications.The great collection of authors and reviewers represents an interdisciplinary team of globally acknowledged experts. The book will therefore make a major contribution to establishing a common professional language, enhancing global communication between wastewater professionals. In addition, the authors have linked the description of the scientific basis for wastewater treatment processes with a video-based online course for the training of students, researchers, engineers, laboratory technicians and treatment plant operators, demonstrating commonly accepted experimentation procedures and their application for lab-, pilot-, and full-scale treatment plant operation.From the perspective of the IWA this book also has the great potential to enhance the development of a new generation of researchers and enable them to communicate on a global scale and beyond their specific field of expertise. Both aspects are urgently needed to develop adapted solutions for specific local conditions and to make them globally available for implementation.There has been a trend for some time that scientific research and practice have been growing apart from each other. Part of the rea...

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Stable aerobic granules for continuous-flow reactors: Precipitating calcium and iron salts in granular interiors

Cited by 106 publications

References 31 publications

Study of aerobic granular sludge stability in a continuous-flow membrane bioreactor

Study of aerobic granular sludge stability in a continuous-flow membrane bioreactor

Size-dependent calcium carbonate precipitation induced microbiologically in aerobic granules

Experimental Methods in Wastewater Treatment

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