[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 5, Number 2 (Spring 2016) ::
Arch Hyg Sci 2016, 5(2): 102-110 Back to browse issues page
Assessment of a Continuous Electrocoagulation on Turbidity Removal from Spent Filter Backwash Water
Hossein Jafari Mansoorian, Mohsen Ansari *, Ehsan Ahmadi, Gharib Majidi
Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Science, Yazd, Iran
Abstract:   (1147 Views)

Background & Aims of the Study: Spent filter backwash water (SFBW) consists of 1-5% of the total treated water typically and it has a high turbidity. Because of the scarcity of water resources and in order to prevent the environmental contamination, effluent treatment of rapid sand filter backwashing is unavoidable. One of the new technologies for removal of turbidity from the effluent is ElectroCoagulation (EC) processes. This study aimed to examine the efficiency of continuous electrocoagulation in turbidity removal from spent filter backwash water.

Materials & Methods: This study was non-continuous experiment. A rectangular cube electrocoagulation tank in 24 cm×17 cm×18 cm dimensions from Plexiglas with the volume of 7.35 liter was made. In this tank there were 4 metal plates (electrode) (15× 22× 0.1cm); two electrodes as cathode and anode which were made of aluminum and iron, respectively. All of the tests were done in continuous flow. According to the study criteria (Time, Turbidity and pH), 126 sample got with the turbidity 320, 350, 400 NTU from rapid sand filter backwashing water, so they were tested in current density; 1, 1.4, 1.8, 2, 2.4, 2.8 and 3.2 ampere in 3 selected detention times (10, 20 and 30 min). Each experiment was repeated two times. In this research the space of electrode and pH is fixed at 1.5 cm and 8.2.

Results: In this case the highest turbidity removal for Al electrode from rapid sand filter backwashing occurred in the current density 3.2 ampere, 30 min detention time and 320 NTU turbidity. The percent of removal for Al was 95.12. The highest removal for Fe electrode from rapid sand filter backwashing occur in the current density 3.2 ampere, 30 min detention time and 320 NTU turbidity. The percent of removal for Fe was 87.40.

Conclusion: Regarding to the results of the tests, using electrocoagulation has an appropriate efficiency in turbidity removal.

Keywords: Effluent of backwash, Electrocoagulation, Turbidity removal, Rapid sand filter, Iran
Full-Text [PDF 549 kb]   (355 Downloads)    
Type of Study: Research | Subject: Environmental Health
Received: 2015/12/2 | Accepted: 2016/02/29 | Published: 2016/03/30
Send email to the article author

Add your comments about this article
Your username or email:

Write the security code in the box >



XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Jafari Mansoorian H, Ansari M, Ahmadi E, Majidi G. Assessment of a Continuous Electrocoagulation on Turbidity Removal from Spent Filter Backwash Water. Arch Hyg Sci. 2016; 5 (2) :102-110
URL: http://jhygiene.muq.ac.ir/article-1-91-en.html
Volume 5, Number 2 (Spring 2016) Back to browse issues page
Archives of Hygiene Sciences Archives of Hygiene Sciences
Persian site map - English site map - Created in 0.123 seconds with 805 queries by yektaweb 3501