[Morphological characteristics of algae floc and its relation with flotation].
Microcysits aeruginosa (MA) was removed by polyaluminium chloride (PAC) in the coagulation-flotation process. The test studied removing effect and morphological characteristics of PAC-MA flocs in the different coagulation conditions and discussed the correlation of them. Fractal dimension was measured by image analysis. The results indicate that the best range in dosage, stirring strength and time of flocculation reaction are respectively 5.6 - 9.8 mg/L Al2O3, 50 - 80 s(-1) and 5 - 8 min in the condition of mixing stirring strength of 500 s(-1), mixing time of 1 min, circulate ratio of 10%. The dosage, stirring strength and time of flocculation reaction influenced the form of flocs remarkably. Moreover the range of fractal dimension D2 is between 1.1688 and 1.2357, and average diameters vary between 300 microm and 500 microm with the best flocculation condition. The flocs with the looser structure, the bigger diameter variation and more branches can adhere to bubbles more easily.
Wang
Yu-Heng
YH
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. sun_wangyh@sina.com
Wang
Qi-Shan
QS
Wu
Yu-Bao
YB
An
Yi
Y
Peng
Xin-Hong
XH
D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000737:chemistry* / Q000494:pharmacology; D002712:Chlorides / Q000737:chemistry* / Q000494:pharmacology; D005374:Filtration; D005427:Flocculation; D046931:Microcystis / Q000187:drug effects / Q000254:growth & development* / Q000302:isolation & purification; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D017607:Aluminum Compounds; D002712:Chlorides; D000077410:Aluminum Chloride