Dissertation > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control

Study on Remediation for Eutrophication by Integrated ECFLFAP-DBDHFP-OW Process

Author RuXuan
Tutor YuZeBin
School Guangxi University
Course Environmental Engineering
Keywords eutrophic water remediation low frequency alternating pulse electro-coagulation-flotation high frequency pulse dielectric barrier discharge over water process
Type Master's thesis
Year 2011
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With the shortage of water resources and deterioration of water quality, using a efficient, clean, less secondary pollution, convenient operation and management algae removal methods is a key point and also a difficult point in the remediation of eutrophic water. In order to overcome the defects and shortcomings of exisiting algae removal technologies, this paper put forward to integrated low frequency alternating pulse electro-coagulation-flotation-high frequency pulse dielectric barrier discharge over water process (integrated ECFLFAP-DBDHFP-OW process). ECFLFAP process is used to remove most of the algae and organic matters in water, in order to improve the efficiency of subsequent process removal sfficiency and shorten reaction time. At the same time, DBDHFP-OW process can enhance the removal rates of algae and organic matters comparison of using ECFLFAP process.This paper discussed the inactivation of Microcystis aeruginos by DBDHFP-OW process with different electrical parameters. And then, severe eutrophic water was taken as research object and ECFLFAP process was adopted to study of the treatment effect from the perspective of removal efficiency, energy conservation, and elimination of passivation to electrodes. Based on the prophase research, we put forward to the integrated ECFLFAP-DBDHFP-OW process, and then, investigated the treatment effect by this combined process. The results show that:Integrated ECFLFAP -DBDHFP-OW process is proved effective to remedy eutrophic water. Under the optimal conditions of aluminum electrolysis, pulse voltage 25 V, pulse frequency 0.1 kHz, duty cycle 70%, electrolysis time 20 min, ECFLFAP process can reduce the Chl-a by 92.36% and UV254 by 40.80%. After ECFLFAP process, under the optimal conditions of pulse frequency 20.3 kHz and input current 0.17 A, nearly 100% removal efficiency of Chl-a was achieved with treatment for 30 min, and organic compounds removal efficiency was increased from 40.80% to 53.23% in DBDHFP-ow process with treatment for 60 min.

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