Interactions of Aqueous NOM with Nanoscale TiO2: Implications for Ceramic Membrane Filtration-Ozonation Hybrid Process

2009 ◽  
Vol 43 (14) ◽  
pp. 5488-5494 ◽  
Author(s):  
Jeonghwan Kim ◽  
Wenqian Shan ◽  
Simon H. R. Davies ◽  
Melissa J. Baumann ◽  
Susan J. Masten ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Hybrid Process

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.

scholarly journals Application of Hybrid Process of Coagulation/Flocculation and Membrane Filtration for the Removal of Protozoan Parasites from Water

10.5772/51287 ◽  
2013 ◽  
Author(s):  
Leticia Nishi ◽  
Angelica Marquetotti Salcedo Vieira ◽  
Ana Lucia Falavigna Guilherme ◽  
Milene Carvalho ◽  
Gabriel Francisco da Silva ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Hybrid Process ◽  
Protozoan Parasites

Removal of geosmin and algae by ceramic membrane filtration with super-powdered activated carbon adsorption pretreatment

2007 ◽  
Vol 7 (5-6) ◽  
pp. 43-51 ◽  
Author(s):  
Y. Matsui ◽  
T. Aizawa ◽  
M. Suzuki ◽  
Y. Kawase
Keyword(s):  
Activated Carbon ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Tap Water ◽  
Powdered Activated Carbon ◽  
Transmembrane Pressure ◽  
Activated Carbon Adsorption ◽  
Consumer Complaints ◽  
Carbon Adsorption ◽  
Water Treatment Plants

The musty-earthy taste and odour caused by the presence of geosmin and other compounds in tap water are major causes of consumer complaints. Although ozonation and granular activated carbon (GAC) adsorption have been practiced in water-treatment plants to remove these compounds effectively, two major problems associated with the application of these processes – formation of stringently regulated bromate ions by ozonation and unhygienic invertebrate colonisation of GAC filters – are still to be resolved. This research advanced the process of adsorption by powdered activated carbon (PAC) by reducing its particle size to the submicrometre range for microfiltration pretreatment. Adsorption pretreatment by using this super (S)-PAC removed the geosmin with vastly greater efficiency than by normal PAC. Removal was attained in a much shorter contact time and at a much lower dosage. The S-PAC was also beneficial in attenuating the transmembrane pressure rises that occurred between both physical backwashings and chemical cleanings.

Effect of Hybrid Photocatalysis and Ceramic Membrane Filtration Process for Humic Acid Degradation

2018 ◽  
pp. 95-113 ◽  
Author(s):  
Lili Song ◽  
Bo Zhu ◽  
Veeriah Jegatheesan ◽  
Stephen R. Gray ◽  
Mikel C. Duke ◽  
...  
Keyword(s):  
Humic Acid ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Filtration Process ◽  
Acid Degradation

scholarly journals Optimization of In Situ Backwashing Frequency for Stable Operation of Anaerobic Ceramic Membrane Bioreactor

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 545 ◽  
Author(s):  
Rathmalgodage Thejani Nilusha ◽  
Tuo Wang ◽  
Hongyan Wang ◽  
Dawei Yu ◽  
Junya Zhang ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Bioreactor ◽  
Ceramic Membrane ◽  
Pure Water ◽  
Ex Situ ◽  
Stable Operation ◽  
Chemical Cleaning ◽  
Cake Layer

The cost-effective and stable operation of an anaerobic ceramic membrane bioreactor (AnCMBR) depends on operational strategies to minimize membrane fouling. A novel strategy for backwashing, filtration and relaxation was optimized for stable operation of a side stream tubular AnCMBR treating domestic wastewater at the ambient temperature. Two in situ backwashing schemes (once a day at 60 s/day, and twice a day at 60 s × 2/day) maintaining 55 min filtration and 5 min relaxation as a constant were compared. A flux level over 70% of the initial membrane flux was stabilized by in situ permeate backwashing irrespective of its frequency. The in situ backwashing by permeate once a day was better for energy saving, stable membrane filtration and less permeate consumption. Ex situ chemical cleaning after 60 days’ operation was carried out using pure water, sodium hypochlorite (NaOCl), and citric acid as the order. The dominant cake layer was effectively reduced by in situ backwashing, and the major organic foulants were fulvic acid-like substances and humic acid-like substances. Proteobacteria, Firmucutes, Epsilonbacteria and Bacteroides were the major microbes attached to the ceramic membrane fouling layer which were effectively removed by NaOCl.

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