US EPA

1000714 

Journal Article 

Effect of PAC addition on immersed ultrafiltration for the treatment of algal-rich water 

Zhang, Y; Tian, J; Nan, J; Gao, S; Liang, H; Wang, M; Li, G 

2011 

Yes 

Journal of Hazardous Materials
ISSN: 0304-3894
EISSN: 1873-3336 

186 

2-3 

1415-1424 

English 

21216530 

10.1016/j.jhazmat.2010.12.015 

WOS:000288344000061 

http://://WOS:000288344000061
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The aim of this study was to evaluate the effect of powdered activated carbon (PAC) addition on the treatment of algal-rich water by immersed ultrafiltration (UF), in terms of permeate quality and membrane fouling. Experiments were performed with a hollow-fiber polyvinyl chloride ultrafiltration membrane at a laboratory scale, 20-25°C and 10 L/(m(2) h) constant permeate flux. UF could achieve an absolute removal of Microcystis aeruginosa cells, but a poor removal of algogenic organic matter (AOM) released into water, contaminants responsible for severe membrane fouling. The addition of 4 g/L PAC to the immersed UF reactor significantly alleviated the development of trans-membrane pressure and enhanced the removal of dissovled organic carbon (by 10.9±1.7%), UV(254) (by 27.1±1.7%), and microcystins (expressed as MC-LR(eq), by 40.8±4.2%). However, PAC had little effect on the rejection of hydrophilic high molecular weight AOM such as carbohydrates and proteins. It was also identified that PAC reduced the concentrations of carbohydrates and proteins in the reactor due to decreased light intensity, as well as the MC-LR(eq) concentration by PAC adsorption. 

Algogenic organic matter; Cyanotoxins; Microcystis aeruginosa; PAC; Ultrafiltration (UF); Constant permeate flux; Cyanotoxins; High molecular weight; Hollow fiber; Laboratory scale; Light intensity; Microcystins; Microcystis aeruginosa; Organic matter; PAC; Permeate quality; Powdered activated carbon; Transmembrane pressures; Ultra-filtration membranes; Activated carbon; Activated carbon treatment; Adsorption; Biogeochemistry; Biological materials; Carbohydrates; Chlorine compounds; Electric reactors; Membrane fouling; Organic carbon; Polyvinyl chlorides; Ultrafiltration; Chemicals removal (water treatment); activated carbon; carbohydrate; microcystin; organic carbon; organic matter; polyvinylchloride; protein; activated carbon; alga; biochemical composition; bioreactor; carbohydrate; cyanobacterium; experimental study; light intensity; membrane; organic matter; permeability; protein; toxin; ultrafiltration; adsorption; alga; article; bacterial cell; fouling control; hydrophilicity; immersed ultrafiltration; light intensity; Microcystis aeruginosa; molecular weight; nonhuman; ultrafiltration; waste component removal; water treatment; Ammonia; Carbohydrates; Charcoal; Chlorophyll; Eutrophication; Membranes, Artificial; Microcystins; Microcystis; Microscopy, Electron, Scanning; Molecular Weight; Nitrites; Organic Chemicals; Powders; Proteins; Spectrophotometry, Ultraviolet; Ultrafiltration; Water Purification; algae; Microcystis aeruginosa