METHOD AND REACTOR FOR REMOVING ORGANIC MATTERS BY IMMOBILIZED-ENZYMATIC ELECTRODE COUPLED ELECTRO-COAGULATION

摘要

The present invention provides a method and a reactor for removing organic matters by immobilized-enzymatic electrode coupled electro-coagulation. In the method, in a single electrochemical system, an enzyme-modified electrode is combined with electro-coagulation to synergistically remove organic matters from water. Certain electrochemical parameters are controlled such that a polymerization reaction is performed between hydrogen peroxide generated by a cathode reaction and organic matters catalyzed by the immobilized-enzymatic electrode. After the polymerization reaction, the organic product enters an anode chamber through a pump. The organic product is precipitated and removed by performing a reaction between the organic product and different hydrolysis products from the electro-coagulation through a coagulating/flocculating effect of compression of a double electric layer, adsorption and electric neutralization as well as precipitation capture. Ultimately, the object of removing the organic matters synergistically through the enzymatic catalyzed polymerization at the cathode and the electro-coagulation at the anode is achieved. The present invention has a strong selectivity for low-concentration toxic organic pollutants and a good effect in removing small-molecular hydrophilic organic matters, the addition amount of enzyme is low, the cathode and the anode are fully used, the cost is reduced, the operation is simple, and the applicable is wide, therefore, the present invention is applicable to a variety of water and wastewater containing organic matters, and the contaminated water.

主权项

1. A method for removing organic matters by immobilized-enzymatic electrode coupled electro-coagulation, comprising the steps of:
1) coupling electro-coagulation and an immobilized-enzymatic electrode in a single electrochemical system in which the cathode is an oxygenating electrode with an immobilized enzyme and the anode is an electro-coagulation sacrificial electrode; 2) separating the cathode and the anode in an electrolytic tank by a hydrogen ion exchange membrane to form a cathode chamber and an anode chamber; 3) introducing a raw water into the cathode chamber; subjecting the organic matters in the raw water to a polymerization reaction catalyzed by hydrogen peroxide generated from a cathode reaction and the immobilized-enzymatic electrode, under a certain cathode potential or a certain current density with a saturated calomel electrode as a reference electrode; and pumping the reacted raw water into the anode chamber after a certain residence time; and 4) generating fresh hydrolysis products by dissolving the metal anode in the anode chamber, under a certain anode potential or a certain current density with a saturated calomel electrode as a reference electrode; precipitating and removing the organic polymerized products, which are produced from an enzymatic catalysis reaction in the cathode chamber, by metal hydrolysis products through a coagulation/flocculation effect of compression of a double electric layer, adsorption and electric neutralization as well as precipitation capture; and discharging the treated water from the anode chamber after an electro-coagulation reaction so as to achieve the object of removing the organic matters synergistically through the enzymatic catalyzed polymerization at the cathode and the electro-coagulation at the anode.