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Membrane bioreactors and their uses in wastewater treatments 总被引:1,自引:0,他引:1
Pierre Le-Clech 《Applied microbiology and biotechnology》2010,88(6):1253-1260
With the current need for more efficient and reliable processes for municipal and industrial wastewaters treatment, membrane
bioreactor (MBR) technology has received considerable attention. After just a couple of decades of existence, MBR can now
be considered as an established wastewater treatment system, competing directly with conventional processes like activated
sludge treatment plant. However, MBR processes still suffer from major drawbacks, including high operational costs due to
the use of anti-fouling strategies applied to the system to maintain sustainable filtration conditions. Moreover, this specific
use of membranes has not reached full maturity yet, as MBR suppliers and users still lack experience regarding the long-term
performances of the system. Still, major improvements of the MBR design and operation have been witnessed over the recent
years, making MBR an option of choice for wastewater treatment and reuse. This mini-review reports recent developments and
current research trends in the field. 相似文献
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Arsenic Removal Technologies for Drinking Water Treatment 总被引:1,自引:0,他引:1
Ng Kuan-Seong Ujang Zaini Le-Clech Pierre 《Reviews in Environmental Science and Biotechnology》2004,3(1):43-53
Arsenic contamination as a consequence of human activities such as mining and pesticide use is affecting the water resource quality worldwide. Because of the high risk of arsenic exposure, specific water treatment processes are required to meet the anticipated more severe water quality standards. Better understanding of presently available processes is necessary to develop economic, efficient and effective methods for arsenic removal. Arsenic could either be coagulated, adsorbed using a wide range of materials both mineral and organic or could be directly rejected by membrane processes such as reverse osmosis and nanofiltration. The recent development of submerged hybrid membrane systems, such as membrane bioreactor in wastewater treatment, offers alternative technologies for arsenic treatment. The membrane in hybrid systems allows a better phase separation between the particles binding the arsenic and the treated water. The effect of pH and contact time, and the existence of other ionic compounds must be taken into account when designing the system for optimum arsenic rejection. Further research on both hydraulic and removal performances of hybrid adsorption/membrane technology is still required to assess the full potential of this technology for arsenic removal. 相似文献
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