Operational factors of submerged inorganic membrane bioreactor for organic wastewater treatment: sludge concentration and aeration rate

2003 ◽  
Vol 47 (1) ◽  
pp. 121-126 ◽  
Author(s):  
E.J. Hwang ◽  
D.D. Sun ◽  
J.H. Tay
Keyword(s):  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Filtration Efficiency ◽  
Optimal Operation ◽  
Aeration Rate ◽  
Inorganic Membrane ◽  
Operation Condition ◽  
Critical Flux ◽  
Filtration System ◽  
Sludge Concentration

Various sludge concentrations and aeration rates were evaluated to find the optimal operation condition of a submerged ceramic membrane filtration system. 5.6 g/L of sludge was diluted with water to concentrations of 2.8 g/L and 1.4 g/L, and the three sludge concentrations were compared in terms of filtration characteristics such as pressure and filtrate flux. Flux was at the highest value of about 30 L/m2.hr at 50 kPa when sludge concentration was 1.4 g/L. In contrast, when sludge concentrations increased to 2.8 g/L and 5.6 g/L, the flux at 50 kPa decreased significantly to 18 L/m2.hr and 10 L/m2.hr, respectively. It was concluded that the sludge concentration directly affected the filtration efficiency, and low sludge concentration was suitable for improving filtration efficiency. Adjusting the aeration rate from 2 L/min to 4 L/min at 5.6 g/L of sludge and 50 kPa of pressure increased flux from 10 L/m2.hr to 13 L/m2.hr. It was obvious that the vigorous aeration improved the filtration efficiency, but the aeration rate did not seem to be high enough to maintain flux lower than critical flux.

scholarly journals Effect of Pre-Oxidation on Coagulation/Ceramic Membrane Treatment of Yangtze River Water

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 369
Author(s):  
Shengji Xia ◽  
Xinran Zhang ◽  
Yuanchen Zhao ◽  
Fibor J. Tan ◽  
Pan Li ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Membrane Separation ◽  
Membrane System ◽  
Coagulation System ◽  
Fouling Control ◽  
Filtration System ◽  
Membrane Treatment

The membrane separation process is being widely used in water treatment. It is very important to control membrane fouling in the process of water treatment. This study was conducted to evaluate the efficiency of a pre-oxidation-coagulation flat ceramic membrane filtration process using different oxidant types and dosages in water treatment and membrane fouling control. The results showed that under suitable concentration conditions, the effect on membrane fouling control of a NaClO pre-oxidation combined with a coagulation/ceramic membrane system was better than that of an O3 system. The oxidation process changed the structure of pollutants, reduced the pollution load and enhanced the coagulation process in a pre-oxidation-coagulation system as well. The influence of the oxidant on the filtration system was related to its oxidizability and other characteristics. NaClO and O3 performed more efficiently than KMnO4. NaClO was more conducive to the removal of DOC, and O3 was more conducive to the removal of UV254.

Establishment of ceramic membrane filtration system for drinking water production

2004 ◽  
Vol 2004.14 (0) ◽  
pp. 303-305
Author(s):  
Shuji YAMADA ◽  
Kazuyuki WAKABAYASHI ◽  
Torataro MINEGISHI ◽  
Nobuhiro AOKI ◽  
Kimitoshi MATSUMOTO
Keyword(s):  
Drinking Water ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Water Production ◽  
Filtration System ◽  
Drinking Water Production

Development of an Electrochemical Ceramic Membrane Filtration System for Efficient Contaminant Removal from Waters

2018 ◽  
Vol 52 (7) ◽  
pp. 4117-4126 ◽  
Author(s):  
Junjian Zheng ◽  
Zhiwei Wang ◽  
Jinxing Ma ◽  
Shaoping Xu ◽  
Zhichao Wu
Keyword(s):  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Contaminant Removal ◽  
Filtration System

315 Establishment of ceramic membrane filtration system for drinking water production (II)

2005 ◽  
Vol 2005.15 (0) ◽  
pp. 266-269
Author(s):  
Yuji YAMADA ◽  
Kazuyuki WAKABAYASHI ◽  
Hiroshi TSUCHIYA ◽  
Yuji KAWASE ◽  
Kimitoshi MATSUMOTO
Keyword(s):  
Drinking Water ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Water Production ◽  
Filtration System ◽  
Drinking Water Production

Bromate formation in a hybrid ozonation-ceramic membrane filtration system

2011 ◽  
Vol 45 (17) ◽  
pp. 5529-5534 ◽  
Author(s):  
Mohammadreza Moslemi ◽  
Simon H. Davies ◽  
Susan J. Masten
Keyword(s):  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Filtration System

scholarly journals Detergent and Water Recovery from Laundry Wastewater Using Tilted Panel Membrane Filtration System

Membranes ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 260
Author(s):  
Nafiu Umar Barambu ◽  
Derrick Peter ◽  
Mohd Hizami Mohd Yusoff ◽  
Muhammad Roil Bilad ◽  
Norazanita Shamsuddin ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Surface ◽  
Aeration Rate ◽  
Water Recovery ◽  
Wastewater Reclamation ◽  
Permeability Enhancement ◽  
Filtration System ◽  
Wastewater Filtration

Increasing global concern on clean water scarcity and environmental sustainability drive invention in water reclamation technology. Laundry wastewater reclamation via membrane technology faces the challenge of membrane fouling. This paper assesses a tilting-the-filtration-panel filtration system for the treatment of real laundry wastewater filtration aimed for water and detergent reuse. Results showed that the panel tilting significantly improved fouling control and enhanced permeability due to enhanced contact of air bubbles with the membrane surface, which induced continuous detachment of foulant from the membrane surface. The combination of aeration rate and tilting angle resulted in up to 83% permeability enhancement from 109 to 221.4 ± 10.8 (L/m2·h·bar). The system also offers 32% detergent recovery. Overall findings suggest that the system offers an attractive approach for both fouling management and detergent recovery and can potentially be applied under a simple setup in which filtration can be driven by gravity/hydrostatic pressure.

Study on the Membrane Fouling of the Process of Using Two Layer Flat-Sheet Membrane for Sludge Thickening and Water Reuse

2015 ◽  
Vol 768 ◽  
pp. 467-475
Author(s):  
Xue Feng Zhu ◽  
Ming Yuan Zhou ◽  
Zhi Wei Wang ◽  
Wen Yi Yuan ◽  
Jie Guan
Keyword(s):  
Membrane Fouling ◽  
Lower Layer ◽  
Aeration Rate ◽  
Membrane Module ◽  
Surface Model ◽  
Critical Flux ◽  
Layer Membrane ◽  
Flat Sheet Membrane ◽  
Sludge Thickening ◽  
Sludge Concentration

In this paper, the critical flux was applied to represent the tendency of membrane fouling. The response surface model was used to study different factors, such as sludge concentration, space between membranes and aeration rate, affecting membrane fouling of the upper and lower layer membrane module. It was found that the model is fitting and significant, moreover, the sludge concentration, space between membranes and aeration rate has a significant impact on the upper and lower membrane fouling. Meanwhile, it was also observed that the critical flux of both upper and lower layer membrane module sharply decreased with the increase of sludge concentration. However, the different variation tendency of membrane fouling between upper and lower layer membrane module was detected due to the change of space between membranes and aeration rate, when it was under different sludge concentrations. Finally, optimum operating parameters under different sludge concentration simulated by response surface model were successfully applied to the process of using flat-sheet membrane for four-stage sludge thickening.

Investigating the Processes of Hydrodynamic Artesian Water Treatment

2021 ◽  
pp. 118-133
Author(s):  
A.Yu. Kurbatov ◽  
E.N. Kuzin ◽  
Yu.M. Averina ◽  
M.A. Vetrova ◽  
A.V. Sitnikov
Keyword(s):  
Water Treatment ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Real Life ◽  
Maximum Efficiency ◽  
Raw Water ◽  
Treatment Processes ◽  
Filtration System ◽  
Insoluble Compounds ◽  
Calcium Compounds

The paper aims to investigate hydrodynamic treatment processes of raw (artesian) groundwater to be used for household needs and drinking. The main advantage of hydrodynamic raw water treatment is that a single device, a so-called hydrodynamic vibration generator, is enough to perform the most important processing (deferrization, manganese removal, aeration) without any additional reactants. A hydrodynamic vibration generator contributes to accelerating mass exchange processes without using additional chemical reactants, solely by means of the kinetic energy inherent in the raw water flow undergoing treatment, which is generated when the hydrodynamic properties of the flow itself change dramatically. The generator by itself does not purify water; it processes raw water so as to derive insoluble products by recombining the forms in which the substances to be removed are found in the water, that is, by transforming dissolved manganese and iron compounds into insoluble compounds and decreasing carbon dioxide content in the water so as to precipitate insoluble calcium compounds. The resulting insoluble compounds are easy to remove via further processing in a ceramic membrane filtration system. Hydrodynamic vibration generator efficiency depends on many factors, which means that, when implementing hydrodynamic raw water treatment in real life, obtaining fundamental laws governing the treatment processes as functions of respective parametric characteristics is a necessary stage so as to ensure maximum efficiency. Our experiment confirmed that a phenomenon known as sonoluminescence occurs in raw water subjected to hydrodynamic treatment. We propose a monitoring technology indirectly confirming the efficiency of the hydrodynamic raw water treatment implemented, which is based on recording the sonoluminescence phenomenon via an acoustic technique

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