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 Coupling Granular Activated Carbon Adsorption with Membrane Filtration for Chemical Oxygen Demand Removal from High Strength Wastewater

2019 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Aida Isma M.I. ◽  
◽  
Abdo Saad ◽  
Rachid Ali A. ◽  
Kenneth Yeoh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Chemical Oxygen Demand ◽  
Membrane Filtration ◽  
Oxygen Demand ◽  
Granular Activated Carbon ◽  
High Strength ◽  
Ammonia Nitrogen ◽  
Transmembrane Pressure ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption

Combined granular activated carbon adsorption with membrane filtration for high strength wastewater treatment have been carried out. Raw oleo-chemical wastewater and leachate were used as sample. Ultrafiltration is also relatively low cost, easy to backwash and operates up to 3 barg. Experiment was carried out by passing through the sample to an adsorption column for 10 minutes followed by membrane filtration at different transmembrane pressure of 1, 2 and 3 barg. Oleo-chemical samples were analysed for chemical oxygen demand, turbidity, suspended solid and leachate samples were analysed for chemical oxygen demand and ammonia nitrogen according to APHA method. Results showed that the best chemical oxygen demand, suspended solids and turbidity removal for oleo-chemical samples achieved at 2 bar with 64%, 93% and 97%, respectively. Leachate showed the best removal of chemical oxygen demand and ammonia nitrogen achieved at 3 bar, with 76% and 87%, respectively. The adsorption process combined with membrane filtration is feasible as an alternative for conventional biological treatment for high strength wastewater. However, GAC exhaustive breakthrough point requires monitoring.

Study on Adsorption of Cr(VI) in Wastewater by Powdered Activated Carbon

2011 ◽  
Vol 287-290 ◽  
pp. 2070-2073
Author(s):  
Jun Tan Liu ◽  
Shi Jing Liu ◽  
Huan Gao
Keyword(s):  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Activated Carbon Adsorption ◽  
Effect Of Ph ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Carbon Adsorption ◽  
Adsorption Temperature

This research focuses on absorption of Cr(VI) in wastewater by powdered activated carbon, and determines the effect of pH, initial concentration of solution, amount of powdered activated carbon, adsorption time, adsorption temperature, etc, on adsorption of Cr(VI) in wastewater. The results show that the treatment of 100mL containing Cr(VI) wastewater with concentration of 50mg/L will work best in the conditions of 0.35g powdered activated carbon, pH=3.0, 298K, and 1hour oscillatory adsorption.

Capillary nanofiltration coupled with powdered activated carbon adsorption for high quality water reuse

2009 ◽  
Vol 60 (1) ◽  
pp. 251-259 ◽  
Author(s):  
C. Kazner ◽  
J. Meier ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Activated Carbon ◽  
Water Reuse ◽  
Membrane Filtration ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Powdered Activated Carbon ◽  
Transmembrane Pressure ◽  
Municipal Wastewater Treatment ◽  
High Quality ◽  
Quality Water

Direct capillary nanofiltration was tested for reclamation of tertiary effluent from a municipal wastewater treatment plant. This process can be regarded as a promising treatment alternative for high quality water reuse applications when combined with powdered activated carbon for enhanced removal of organic compounds. The nanofiltration was operated at flux levels between 20 and 25 L/(m2 h) at a transmembrane pressure difference of 2–3 bar for approximately 4,000 operating hours. The study was conducted with PAC doses in the range from 0 to 50 mg/L. The plant removal for DOC ranged from 88–98%. The sulfate retention of the membrane filtration process was between 87 and 96%. The process provided a consistently high permeate quality with respect to organic and inorganic key parameters.

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