—Orthogonal experimental plan was used to explore
the effect of aeration rate, electrolysis time, and current density
on the total phosphorus (TP) removal of sewage from
purification tank (Johkasou). The results showed that the
removal efficiencies of total phosphorus in an
anode-cathode-anode electrolytic cell increased by from 3.4% to
22.6% than that of an anode-cathode electrolytic cell. For the
anode-cathode-anode electrolytic cell, the TP concentration of
effluent could reach below 1mg/L (discharge standard for
effluent) with a TP removal rate above 95.9% under the
condition of electrolysis time of 60 mins or current density of 4
mA·cm-2. Whereas the anode-cathode electrolytic cell must
require a combination with any two of the above three
experimental factors at high levels to achieve the discharge
standard, and the TP removal rates were more than 92.6%.
Aeration improved the phosphorus removal rate in the
electrolysis apparatus. Fourier transform infrared spectroscopy
(FTIR) analysis showed that the precipitate of
electro-coagulation was a mixture of hydroxyl iron phosphate
and iron phosphate. The phosphorus of the sewage in the
Johkasou could be effectively removed through sludge
—Electro-coagulation, electrolysis, Johkasou,
total phosphorus, removal rate.
S. Wang and F. Li are with the School of Chemistry and Environmental
Engineering, Yangtze University, Jingzhou, 434023, China (e-mail:
email@example.com, firstname.lastname@example.org, email@example.com).
Z. Liu and G. Liu are with the Engineering Research Center of Ecology
and Agricultural Use of Wetland, Ministry of Education. Jingzhou, 434025,
Cite: Shu Wang, Fangmin Li, Zhangyong Liu, and Guoping Liu, "Phosphorus Removal from Wastewater in Johkasou Sewage Treatment Tank by Electro-coagulation," International Journal of Environmental Science and Development vol. 7, no. 11, pp. 797-800, 2016.