Reference

Ahmed, Z.; Cho, J.; Lim, B.-R.; Song, K.-G.; Ahn, K.-H. (2007) Effects of sludge retention time on membrane fouling and microbial community structure in a membrane bioreactor, J. Membr. Sci., 287, 211-218. Al-Halbouni, D.; Lyko, S.; Janot, A.; Tacke, D.; Dott, W.; Hollender, J. (2007) Impact of solids retention time on EPS and fouling tendency […]

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Effect of various sludge disintegration methods on membrane fouling

Except ozonation, all other sludge disintegration methods have a potential to increase membrane fouling although there are not many references to cite. All the chemical methods such as alkaline/acid treatment, decoupling agents addition, etc.only increase the level of cell debris in mixed liquor, which are the major membrane foulants in MBR. Mechanical methods such as […]

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Effect of sludge ozonation on membrane fouling

  It has been well known that ozonation of mixed liquor can increase the average particle size due to the unproportional destruction of small particles. It is perhaps because the highly active ozone reacts with any organic substances on its way while the small particles have larger surface to volume ratio that provide better chance […]

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Effect of biosolids reduction on nutrient removal

Effect of sludge disintegration on nutrient removal    One intrinsic drawback of biosolids (or sludge) reduction processes is that it potentially hampers biological phosphorus removal. It is simply because biological phosphorous removal relies on the excess biological removal from the system. On the contrary, nitrogen removal is not significantly affected when ozone is used in […]

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Principle of biosolids reduction

   The amount of biosolids production can be reduced by extending solids retention time (SRT). Biosolids reduction occurs by two different mechanisms in a typical activated sludge process. Microorganisms lose their mass slowly to generate energy to maintain the life, which is so called “endogenous respiration”. Active transport of ions against osmotic pressure through the […]

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Effect of mixed liquor distribution on membrane performance

In an MBR system with multiple aeration and membrane tanks, liquid flow distribution among tanks must be rigorous enough to guarantee successful operation. If mixed liquor distribution is not performed properly, MLSS can be different tank by tank, which can cause excessive MLSS accumulation in some membrane tanks. If the membranes in those tanks cannot […]

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