Printing and dyeing?wastewater autotrophy denitrification device

The utility model provides a printing and dyeing?wastewater autotrophy denitrification device belongs to the printing and dyeing?wastewater processing technique field. Through autotrophy denitrifying bacteria to is still ortho states sulphur electron donor with iron, with the NO3 of aquatic N restores into N2 and realizes the denitrogenation. The utility model discloses a troilite and sulphur combination are loaded to optimize the ratio, have the denitrogenation efficient, go out water pH and change little advantage. It is fast simultaneously still to have the toggle speed, need not to vaccinate mud, advantages such as back flush cycle length. The circumstances that factory's second grade goes out water TN can be handled according to printing and dyeing?wastewater to this device, moves when taking TN to exceed standard, and bring to rest when TN is up to standard, the second grade goes out water and directly crosses over the utility model discloses get into next processing unit or direct the emission, it is n