The Experts below are selected from a list of 27150 Experts worldwide ranked by ideXlab platform
Kun Li - One of the best experts on this subject based on the ideXlab platform.
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influence of nanofiltration concentrate recirculation on performance and economic feasibility of a pilot scale Membrane Bioreactor nanofiltration hybrid process for textile wastewater treatment with high water recovery
Journal of Cleaner Production, 2020Co-Authors: Kun Li, Fan Fang, Xiongwei Wu, Yunpu Wang, Paul Chen, Roger RuanAbstract:Abstract The Membrane Bioreactor-nanofiltration hybrid process has been proven to be promising for textile wastewater treatment. High water recovery could be achieved through the recirculation of nanofiltration concentrate to the Membrane Bioreactor. However, its influence on both the performance and economic feasibility of the Membrane Bioreactor-nanofiltration was not fully investigated, especially at larger scale. In this study, a pilot-scale Membrane Bioreactor-nanofiltration system was used for the on-site treatment of textile wastewater. The hydraulic retention time of Membrane Bioreactor was first optimized (Stage A), then the Membrane Bioreactor-nanofiltration system was operated at different water recovery rates (Stage B). The results showed that the sludge activity was relatively stable, but the nanofiltration concentrate recirculation significantly influenced the pollutants removal efficiencies of Membrane Bioreactor. The Membrane Bioreactor-nanofiltration effluent is suitable for reuse and the high water recovery could bring considerable benefits that enhance the economic feasibility of the process with a net income of 1.24 M USD/y and a payback period of 3.11 y.
Yunpu Wang - One of the best experts on this subject based on the ideXlab platform.
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influence of nanofiltration concentrate recirculation on performance and economic feasibility of a pilot scale Membrane Bioreactor nanofiltration hybrid process for textile wastewater treatment with high water recovery
Journal of Cleaner Production, 2020Co-Authors: Kun Li, Fan Fang, Xiongwei Wu, Yunpu Wang, Paul Chen, Roger RuanAbstract:Abstract The Membrane Bioreactor-nanofiltration hybrid process has been proven to be promising for textile wastewater treatment. High water recovery could be achieved through the recirculation of nanofiltration concentrate to the Membrane Bioreactor. However, its influence on both the performance and economic feasibility of the Membrane Bioreactor-nanofiltration was not fully investigated, especially at larger scale. In this study, a pilot-scale Membrane Bioreactor-nanofiltration system was used for the on-site treatment of textile wastewater. The hydraulic retention time of Membrane Bioreactor was first optimized (Stage A), then the Membrane Bioreactor-nanofiltration system was operated at different water recovery rates (Stage B). The results showed that the sludge activity was relatively stable, but the nanofiltration concentrate recirculation significantly influenced the pollutants removal efficiencies of Membrane Bioreactor. The Membrane Bioreactor-nanofiltration effluent is suitable for reuse and the high water recovery could bring considerable benefits that enhance the economic feasibility of the process with a net income of 1.24 M USD/y and a payback period of 3.11 y.
Kibaek Lee - One of the best experts on this subject based on the ideXlab platform.
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preparation of a mesoporous silica quorum quenching medium for wastewater treatment using a Membrane Bioreactor
Biofouling, 2020Co-Authors: Kibaek Lee, Kwangho Choo, Chunghak LeeAbstract:Various quorum quenching (QQ) media have been developed to mitigate Membrane biofouling in a Membrane Bioreactor (MBR). However, most are expensive, unstable and easily trapped in hollow fibre memb...
J M Poyatos - One of the best experts on this subject based on the ideXlab platform.
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kinetic modeling and microbiological study of two step nitrification in a Membrane Bioreactor and hybrid moving bed biofilm reactor Membrane Bioreactor for wastewater treatment
Chemical Engineering Journal, 2015Co-Authors: Juan Carlos Leyvadiaz, Alejandro Gonzalezmartinez, J Gonzalezlopez, M M Munio, J M PoyatosAbstract:Abstract A Membrane Bioreactor (MBR), a hybrid moving bed biofilm reactor–Membrane Bioreactor (MBBR–MBR) containing carriers in the anoxic and aerobic zones of the Bioreactor and a hybrid MBBR–MBR which contained carriers only in the aerobic zone were used in parallel with the same urban wastewater and compared. The reactors operated with a hydraulic retention time (HRT) of 9.5 h. Kinetic parameters for heterotrophic and autotrophic biomasses, mainly ammonium-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB), were evaluated and related to organic matter and nutrients removals. The microbial communities of each wastewater treatment plant (WWTP) were analyzed by 454 pyrosequencing methods to detect and quantify the contribution of nitrifying bacteria in the total bacterial community. All three systems showed similar performance in terms of pollutant removal although the hybrid MBBR–MBR containing carriers only in the aerobic zone of the Bioreactor (WWTP 3) showed the best performance from the point of view of the kinetics of heterotrophic and nitrite-oxidizing bacteria, with values of μ m,H = 0.02665 h −1 , K M = 8.88081 mg O 2 L −1 , μ m,NOB = 0.53690 h −1 and K NOB = 2.16702 mg N L −1 . It supported the efficiencies of chemical oxygen demand (COD) and total nitrogen (TN) removals and the concentrations of nitrite and nitrate in the different effluents.
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comparative kinetic study between moving bed biofilm reactor Membrane Bioreactor and Membrane Bioreactor systems and their influence on organic matter and nutrients removal
Biochemical Engineering Journal, 2013Co-Authors: Juan Carlos Leyvadiaz, J Gonzalezlopez, Kadiya Calderon, F A Rodriguez, E Hontoria, J M PoyatosAbstract:Abstract New technologies regarding wastewater treatment have been developed. Among these technologies, the moving bed biofilm reactor combined with Membrane Bioreactor (MBBR-MBR) is a recent solution alternative to conventional processes. This paper presents the results obtained from three wastewater treatment plants working in parallel. The first wastewater treatment plant consisted of a Membrane Bioreactor (MBR), the second one was a MBBR-MBR system containing carriers both in anoxic and aerobic zones, and the last one consisted of a MBBR-MBR system which contained carriers only in the aerobic zone. The reactors operated with a hydraulic retention time of 26.47 h. During the study, the difference between the experimental plants was not statistically significant concerning organic matter and nutrients removal. However, different tendencies regarding nutrients removal are shown by the three wastewater treatment plants. In this sense, the performances in terms of nitrogen and phosphorus removal of the MBBR-MBR system which contained carriers only in the aerobic zone (67.34 ± 11.22% and 50.65 ± 11.13%, respectively) were slightly better than those obtained from another experimental plants. As a whole, the pilot plant which consisted of a MBR showed better performance from the point of view of the kinetics of the heterotrophic and autotrophic biomass with values of μ m , H = 0.00858 h −1 , μ m , A = 0.07646 h −1 , K M = 2.37 mg O 2 L −1 and K NH = 1.31 mg N L −1 .
Yi Qian - One of the best experts on this subject based on the ideXlab platform.
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effect of sludge retention time on microbial behaviour in a submerged Membrane Bioreactor
Process Biochemistry, 2001Co-Authors: Xia Huang, Ping Gui, Yi QianAbstract:To clarify the effect of sludge retention time (SRT) on performance and microbial behaviour in a submerged Membrane Bioreactor for the treatment of domestic wastewater, four runs of a laboratory scale reactor with hydraulic retention time of 5 h and SRTs of 5, 10, 20 and 40 days, respectively, were conducted. The Membrane Bioreactor process was capable of achieving over 90% removals both for chemical oxygen demand and ammonia nitrogen, on average, almost independent of SRT. With prolonged SRT, concentrations of suspended solids and volatile suspended solids in the Bioreactor increased accordingly, whereas sludge growth kinetic parameters, sludge yield and endogenous decay coefficients, declined slightly and exponentially, respectively. The mean sludge particle sizes at different SRTs were in the range 14.82–48.24 μm, providing a favourable environment for enhancement of mass transport. Characterized by an oxygen consumption rate, sludge specific activities both for organic decomposition and nitrification of ammonia nitrogen varied with SRT. However, volumetric oxygen consumption rates of the Membrane Bioreactor, representing the whole ability of the process for decomposing pollutants, were enhanced as SRT increased.
