62 results about "Groundwater nitrate" patented technology

The invention provides a microbial fuel cell capable of repairing nitrate polluted underground water in situ. The microbial fuel cell comprises an anode chamber, a cathode chamber, anion exchange membranes at the two sides of the cathode chamber and an external circuit system, wherein the anode chamber is provided with a water inlet pipe, a water outlet pipe and an exhaust pipe and is internally provided with a biological anode, and anaerobic electro-microorganisms are attached to the biological anode; the anode chamber is fully filled with anode liquor, and efficient anaerobic digestion sludge is inoculated in the anode chamber; the cathode chamber is provided with an exhaust pipe and is internally provided with a biological cathode, and electroactive denitrifying microorganisms are attached to the biological cathode; the cathode chamber is fully filled with cathode liquor, and denitrifying sludge is inoculated in the cathode chamber; the external circuit system comprises an external resistor, a lead and an electrical signal acquisition recorder. The microbial fuel cell has three functions of organic waste water treatment, biological electricity production and in-situ repair of nitrate polluted underground water, solves the problem of secondary pollution, caused by organic matter, microorganisms and the like, on underground water in the in-situ repair process and is compact in structure and low in running cost as well as economic and efficient.