METHOD AND SYSTEM OF TREATING WASTEWATER

摘要

PROBLEM TO BE SOLVED: To perform a wastewater treatment corresponding to the variation of pollutant concentration of water to be treated.

SOLUTION: The system of treating wastewater includes at least: a microorganism treatment tank 2 treating the pollutant in the water to be treated 15 by using microorganisms; an electron donor feed apparatus 3 contained in the microorganism treatment tank 2 and feeding an electron donor 8a to the microorganisms; and a measuring means 4 measuring the pollutant concentration in the treating water to be treated 15. The electron donor feed apparatus 3 includes at least: a vessel 7 of a sealed structure having a non-porous membrane 6 at least in one part; a storage tank 9 storing an electron donor solution 8 with the electron donor 8a dissolved in water; a liquid feed pipe 10 connecting the storage tank 9 to the vessel 7; a liquid discharge pipe 11 connecting the storage tank 9 to the vessel 7; a circulation means 14 circulating the electron donor solution 8 between the vessel 7 and the storage tank 9; and a control means 13 controlling the concentration of the electron donor of the electron donor solution 8 flowing through the vessel 7 according to the pollutant concentration measured by the measuring means 4.

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