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Authors
Affiliations
1 College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 4 (2017), Pagination: 1279-1282
Abstract
In this research, electrochemical system was adapted to decompose lightly polluted wastewater (LPW). The major pollutants of LPW were removed and its removal effects were investigated. Meanwhile, courses of the electrochemical reaction for nitrogen and phosphorus were discussed. Experiments results exhibited that the best removal rates of NH3-N and TN respectively were 100% and 90.9% after dosing NaCl. In addition, under the condition of different electrolysis time, removal of pollution was better than without NaCl, namely, the pollution was removed rapidly through electrolysis when other experimental conditions remained invariable. Meanwhile, the optimal operation condition could be confirmed while the current density was 7.4mA/cm2, the cell voltage was 6 V, electrolysis time was 30 min, the plate distance was 1cm and the ratios of concentration of NH4+ and Cl- were 1:3, respectively. Besides, the removal effects for nitrogenous compounds as the change of the chloride concentration were investigated, too. And the results exhibited that higher the chloride concentration in the wastewater was, the higher the removal rate for nitrogenous compounds was. The removal rates of nitrogenous compounds increased with the increasing of cell voltage. Therefore, the influence of every factor could be obtained through considering the power consumption of per ton wastewater treatment.
Keywords
Electrochemical Method, Electrolysis Time, NaCl Dosing, Nitrogenous Matter.
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