A new design of microfiltration system and application to wastewater treatment

Citation
Dj. Chang et al., A new design of microfiltration system and application to wastewater treatment, WATER SCI T, 41(10-11), 2000, pp. 181-188
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
WATER SCIENCE AND TECHNOLOGY
ISSN journal
0273-1223 → ACNP
Volume
41
Issue
10-11
Year of publication
2000
Pages
181 - 188
Database
ISI
SICI code
0273-1223(2000)41:10-11<181:ANDOMS>2.0.ZU;2-A
Abstract
A new microfiltration system with two sets of dead-end membrane cells and d riven by a piston force system was designed in this study. In this system, suction of the filtrate was through the membrane in the reverse direction w ith a piston to backwash and reduce membrane fouling. In addition, after a few forward-reverse filtration cycles, the concentrated suspension of parti cles or solute on the retentate side was discharged into the stock tank und er the cross flow condition. For maximizing the filtrate volume, it was fou nd that the optimum times for forward and reverse filtration were 90 s and 3 s respectively, and the discharge frequency of retentate was 1 time per c ycle. Moreover, it was also found that the filtrate volume increased with a n increase in particle size and membrane pore size but decreased with an in crease in feed concentration. Furthermore, an optimal filtrate Volume exist ed on effecting the pressure drop. finally, it could be used efficiently to treat and recycle the backwash wastewater from a rapid sand filter by a me mbrane with pore size of 0.1 and 0.22 mu m.