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Originally posted by feng-peng-cheng at 2009-8-24 14:11:
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21Â¥2009-08-24 14:15:09
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peastarch

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STARCH

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Aerobic granulation is a recently described phenomenon and currently under active investigation in wastewater biological treatment. It is generally accepted that aerobic granular sludge is a compact microbial aggregate formed via the self-immobilization of different microorganisms, and shares different features compared with conventional activated sludge floc. Granules were found to have the advantages of great settleability, high mechanical strength, balanced microbial community, high bio-activity, great stability and protection from toxic shock. So far most studies mainly focused on the mechanism of formation, structure of the microbial population and physic-chemical characteristics of aerobic granules, operation and application of granules reactors and so on.
The previous research showed that aerobic granules were be incubated from anaerobic granular sludge indirectly[1] and cultivated by being seeded with aerobic sludge floc, and the following factors were considered important to the aerobic granulation, e.g., organic loading rate[2][3], sedimentation time[4][5], hydraulic retention time[6], oxygen concentrations[7][8], substrate compositions[9][10], hydraulic shearing force[11][12][13], periodical starvation[14], exchange ratio in SBR[5], cellular polysaccharides[15], pH, Alkalinity, and so on.
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To date, little information is available on effects of organic loading rates (OLRs) and substrate COD/N/P ratios on the granular granulation. Therefore, this study attempts to cultivate granules in the SBRs by being seeded with floc sludge under the different OLRs and substrate COD/N/P ratios, The first appearance time , maturation time, biological morphology, settleability, and organic matter removal efficiency of granules for wastewater were used to as indicators to evaluate the granulation. It was expected that these results would be helpful for the development of quick startup and stable running of granules bioreactor.

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22Â¥2009-08-24 14:30:17
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scott2080

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

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Originally posted by peastarch at 2009-8-24 14:30:
Aerobic granulation is a recently described phenomenon and currently under active investigation in wastewater biological treatment. It is generally accepted that aerobic granular sludge is a compac ...

´óϺ  organic loading rates (OLRs) and substrate COD/N/P ratios on the granular granulation  Õâ¸ö¾ÍÊÇ´´Ðµ㠠ûÓз¢ÏÖÓÐÈË×ö¹ý°¡

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23Â¥2009-08-24 14:51:56
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24Â¥2009-08-27 14:59:10
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kimuranaka

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25Â¥2009-08-27 19:12:59
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