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Guo Tingting, Liu Ruiping, Yi Xiu, Chen Guixia, Hu Chengzhi. Control of residual aluminum during coagulation in treatment of reservoir source water with high alkalinity[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 836-842.
Citation: Guo Tingting, Liu Ruiping, Yi Xiu, Chen Guixia, Hu Chengzhi. Control of residual aluminum during coagulation in treatment of reservoir source water with high alkalinity[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 836-842.
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Control of residual aluminum during coagulation in treatment of reservoir source water with high alkalinity

  • 1.

    State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

  • 2.

    School of Environmental Science & Engineering, Chang’an University,Xi’an 710064, China

  • 3.

    School of Environmental and Civil Engineering, North China University of Water Resources and Electric Power, Zhenzhou 450011, China

  • Received Date: 04/05/2012
    Accepted Date: 22/11/2011
    Available Online: 18/03/2013
    Fund Project:
  • To minimize the residual aluminum (Al) levels in the effluent of a drinking water treatment plant (DWTP) with reservoirs source water of high alkalinity,the coagulation performances and the residual Al concentrations using three flocculants,with different basicity (B) and Alb content,were investigated under varibale Al doses and pH. The results indicate that the basicity and Alb content significantly affect coagulation behaviors.The removal efficiency of DOC and turbidity increases with elevated doses of AlCl3 (B=0), PACl-1 (B = 1.2), and PACl-2 (B = 2.2). The concentrations of total Al and dissolved Al are the lowest at Al doses of 1.5~2.0 mg/L for three flocculants.As for the PACl-2, which is prepared by this DWTP, both strategies of decreasing the basicity of flocculant and adjusting the solution pH to 7~7.5 are useful to enhance the coagulation performances and to decrease the residual Al levels. Moreover, the adjustment of flocculant preparation is preferred in the future application.
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Control of residual aluminum during coagulation in treatment of reservoir source water with high alkalinity

  • Received Date: 04/05/2012
  • Accepted Date: 22/11/2011
  • Available Online: 18/03/2013
Fund Project:

Abstract: To minimize the residual aluminum (Al) levels in the effluent of a drinking water treatment plant (DWTP) with reservoirs source water of high alkalinity,the coagulation performances and the residual Al concentrations using three flocculants,with different basicity (B) and Alb content,were investigated under varibale Al doses and pH. The results indicate that the basicity and Alb content significantly affect coagulation behaviors.The removal efficiency of DOC and turbidity increases with elevated doses of AlCl3 (B=0), PACl-1 (B = 1.2), and PACl-2 (B = 2.2). The concentrations of total Al and dissolved Al are the lowest at Al doses of 1.5~2.0 mg/L for three flocculants.As for the PACl-2, which is prepared by this DWTP, both strategies of decreasing the basicity of flocculant and adjusting the solution pH to 7~7.5 are useful to enhance the coagulation performances and to decrease the residual Al levels. Moreover, the adjustment of flocculant preparation is preferred in the future application.

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