Development of advanced ceramic membrane filtration system combined with ozonation and powdered activated carbon treatment

2001 ◽  
Vol 1 (5-6) ◽  
pp. 91-96 ◽  
Author(s):  
M. Shioyama ◽  
T. Kawanishi ◽  
S. Yokoyama ◽  
M. Nuno ◽  
T. Yamamoto
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Powdered Activated Carbon ◽  
Medium Size ◽  
Biological Degradation ◽  
By Products

Combining the Kubota Tank-Submerged type Ceramic Membrane filtration (TSCM) system with ozonation and powdered activated carbon (PAC) treatment, a new water treatment system, the advanced TSCM system, has been developed. It is a compact, maintenance-free and high performance system for water treatment plants in the small and medium size cities. In this paper, experimental results using 5.5m3/day demonstration plants are shown, and treatment performance is discussed mainly focussing on removal of disinfection by-products. Turbidity, color, total iron, total manganese and ammonia nitrogen were removed to below their detection limits. Accumulation of suspended solids including PAC at a maximum concentration of 8000 mg/L in the membrane tank increases biological degradation activity in the TSCM system. Furthermore, it was confirmed that the advanced TSCM system was able to effectively eliminate disinfection by-products and other organic contaminants in raw water. 75% of T-THMFP removal rate was obtained at only 10 mg-PAC/L dosage without the effect of ozone dosage, while the PAC treatment at 50 mg-PAC/L dosage prior to coagulation results in T-THMFP removals ranging from 40 to 60% (The Adoption Guideline of Advanced Water Treatment Facility, 1988). Therefore, it is concluded that the advanced TSCM system saves on the amount of PAC and is more cost-effective than the other conventional water treatment systems due to efficient utilization of the adsorption capacity of PAC.

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.

scholarly journals Adsorptive removal of geosmin by ceramic membrane filtration with super-powdered activated carbon

2007 ◽  
Vol 56 (6-7) ◽  
pp. 411-418 ◽  
Author(s):  
Yoshihiko Matsui ◽  
Takako Aizawa ◽  
Fumiaki Kanda ◽  
Naoko Nigorikawa ◽  
Satoru Mima ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Powdered Activated Carbon ◽  
Adsorptive Removal

scholarly journals Hazardous cyanobacteria integrity response to velocity gradient and powdered activated carbon in water treatment plants

2021 ◽  
Vol 773 ◽  
pp. 145110
Author(s):  
Samylla Oliveira ◽  
Allan Clemente ◽  
Indira Menezes ◽  
Amanda Gois ◽  
Ismael Carloto ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Velocity Gradient ◽  
Powdered Activated Carbon ◽  
Water Treatment Plants

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 Fate of Benzophenone, Benzophenone-3 and Caffeine in Lab-Scale Direct River Water Treatment by Hybrid Processes

2021 ◽  
Vol 18 (16) ◽  
pp. 8691
Author(s):  
Minja Bogunović ◽  
Tijana Marjanović ◽  
Ivana Ivančev-Tumbas
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
River Water ◽  
Removal Efficiency ◽  
Powdered Activated Carbon ◽  
Personal Care ◽  
High Efficacy ◽  
Hybrid Processes ◽  
Neutral Ph ◽  
Anthropogenic Markers

Emerging microcontaminants benzophenone (BP), benzophenone-3 (BP-3) and caffeine (CF) are widely used anthropogenic markers from a group of pharmaceuticals and personal care products. They have different logD values and charges at neutral pH (2.96 neutral for BP; 3.65 negative and neutral for BP-3; 0.28 and neutral for CF). The goal of this study was to assess the efficacy of coagulation/flocculation/sedimentation (C/F/S), adsorption onto two types of powdered activated carbon (PAC)/sedimentation (PAC/S) and the combination of these two processes in different dosing sequences (PAC/C/F/S) and with/without ultrafiltration (powdered activated carbon/ultrafiltration—PAC/UF, coagulation/UF—CoA/UF) for the removal of selected micropollutants from river water. It was shown that the removal efficiency of benzophenones by coagulation depends on the season, while CF was moderately removed (40–70%). The removal of neutral BP by two PACs unexpectedly differed (near 40% and ˃93%), while the removal of BP-3 was excellent (>95%). PACs were not efficient for the removal of hydrophilic CF. Combined PAC/C/F/S yielded excellent removal for BP and BP-3 regardless of PAC type only when the PAC addition was followed by C/F/S, while C/F/S efficiency for CF diminished. The combination of UF with PAC or coagulant showed also high efficacy for benzophenones, but was negligible for CF removal.

Distribution and Transformation of Molecular Weight of Organic Matters in a Canal Water Treatment Procedure

2012 ◽  
Vol 610-613 ◽  
pp. 2483-2487
Author(s):  
Xiao Dan Zhao ◽  
Chun Hua Wu ◽  
Zhen Zhou
Keyword(s):  
Molecular Weight ◽  
Activated Carbon ◽  
Water Treatment ◽  
Removal Rate ◽  
Ultrafiltration Membrane ◽  
Raw Water ◽  
Canal Water ◽  
Treatment Procedure ◽  
Organic Matters ◽  
Membrane Method

Distribution and transformation of molecular weight of organic matters in canal raw water, primary coagulated water, secondary coagulated water, enhanced coagulated water and water filtered by activated carbon were monitored by ultrafiltration membrane method. The results show that organics on the fraction of molecular weight less than 2kDa has the largest ratio in total organics of outlets of coagulation and activated carbon tank. Removal rate of total organics is about 73% by secondary coagulation, but which of micromolecule organics of molecular weight less than 2kDa is only 10%, which can be removed by activated carbon more than 80%.

scholarly journals Pyrolytic valorization of water treatment residuals containing powdered activated carbon as multifunctional adsorbents

Chemosphere ◽  
2020 ◽  
Vol 252 ◽  
pp. 126641
Author(s):  
Ye-Eun Lee ◽  
Dong-Chul Shin ◽  
Yoonah Jeong ◽  
I-Tae Kim ◽  
Yeong-Seok Yoo
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Powdered Activated Carbon ◽  
Water Treatment Residuals
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