Electrochemical Oxidation Pretreatment of High Salinity Organic Pesticide Wastewater

Pesticide industry is one main source of the chemical industry polluters and it always produces organic wastewater. The wastewater is attributed with relatively high concentration, high salinity, high chroma and high toxicity, and it is difficult to be degraded by microbes. This article implemented the optimization of pretreatment based on the traditional MVR wastewater treatment: “electrolytic oxidation pretreatment + MVR evaporation system” and selected the optimal experimental parameters: Ti/RuO2 electrode is the anode, stainless steel electrode is the cathode, the electrode distance (d) is controlled at 1cm, and the density of the current is set to 71 mA/cm2. With 7 hours’ electrolysis, the muddy brown wastewater with 15600 times chroma is transferred to be colorless and transparent. The sodium chloride content is over 94% after the electrolytic solution is processed by the simulation MVR system, which can meet the secondary emission standards of industrial salt implemented in Man 1st, 2016.