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The effect of powdered activated carbon (PAC) on the hybrid PAC/UF (PAC applied in combination with the ultrafiltration membrane) system was investigated in this paper. Compared to UF system, in which no PAC was added, the membrane flux was improved from 58.58% to 69.59% in terms of J/J0 value for 200 minutes' filtration. In PAC/UF process, it is the fraction which cannot be adsorbed by PAC takes...
Membrane pollution and its cleaning technology in MBR water treatment process were tested. Membrane of short-term (22d) experiment and membrane of long-term (210d) experiment were cleaned separately by cold water rarr hot water rarr sodium hypochlorite rarr ethanol, membrane fluxes came back to the 94.4% and 70.3% of the new membranes, respectively. Another membrane of long-term (210d) experiment...
UF (ultrafiltration) technology has been in progress as an alternative to conventional drinking water treatment of raw water which usually contains algae both in domestic and abroad. But fast decrease of membrane flux and ineffective backwashing are major limitations for application of UF on algae-rich water. Pretreatment by permanganate/PAC (powdered activated carbon)/coagulant and a better range...
In this paper, our previous work on the fabrication of four models involving nanometer-size TiO2 and their environmental applications are reviewed. The material characterization and the ability to remove pollutants in water for four models are examined. The obtained models have exhibited excellent photo electrocatalytic activity, high photoconversion efficiency, superior charge separating ability...
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