Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener

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Hosseininasab Marzieh; REZAZADEH ROOHOLLAH

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Journal: WATER AND WASTEWATER Year:2017 | Volume:28 | Issue:5 Page(s): 48-57

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Information Journal Paper

Title

Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener

Author(s)

Hosseininasab Marzieh | REZAZADEH ROOHOLLAH | Issue Writer Certificate

Keywords

Water RecoveryQ1

Gol-E-GoharQ1

TailingQ1

FlocculantQ1

Taguchi Experiment DesignQ2

Abstract

Water plays a vital role in mineral processing as evidenced by the approximately 2 to 3 tons of water used for the treatment of one ton of ore. A major portion of this water may be recovered in thickeners. This study aimed to control the wet Tailings output of the Hematite Gol-E-Gohar plant by changing Flocculant dosage and type and solid percentage in the feed in order to enhance effluent clarity and reduce water consumption. Materials and A series of settling experiments were performed using different combinations of the Flocculants (A25, A26 Yazd, A26 Esfahan, A27, and A28), Flocculant doses (20, 25, 30, 35, and 40 gr/ton), and solid loads in the feed (5, 7, 9, 10, and 11%) to the thickener. The L25 Taguchi design method was chosen to handle the five different levels of the three factors. Adopting a 95% confidence interval, the results of analysis of variance (ANOVA) revealed that Flocculant consumption rate had a high effect on settling velocity (p = 0. 006) while Flocculant type and solid percentage in the feed had no significant effects. Moreover, it was found that A26 (Akhtar-chemistry Company, Yazd) used at a rate of 40 g/ton improved the settling performance to yield an optimal water clarity. Using the findings of this study in process planning at the plant led to a considerable reduction (from the original 0. 86 to 0. 49 m3) in average water consumption per ton of input material so that the solid content of the thickener underflow rose from 7 to 45%.

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References

A new approach to define batch settling curves for analyzing the sedimentation characteristics

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APA: Copy

Hosseininasab, Marzieh, & REZAZADEH, ROOHOLLAH. (2017). Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener. WATER AND WASTEWATER, 28(5 ), 48-57. SID. https://sid.ir/paper/366023/en

Vancouver: Copy

Hosseininasab Marzieh, REZAZADEH ROOHOLLAH. Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener. WATER AND WASTEWATER[Internet]. 2017;28(5 ):48-57. Available from: https://sid.ir/paper/366023/en

IEEE: Copy

Marzieh Hosseininasab, and ROOHOLLAH REZAZADEH, “Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener,” WATER AND WASTEWATER, vol. 28, no. 5 , pp. 48–57, 2017, [Online]. Available: https://sid.ir/paper/366023/en

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