| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for denitrification treatment of ammonium nitrogen and calcium-containing wastewater capable of stably attaching and fixing an ammonium oxidizing bacterium to a carrier and capable of carrying out stable nitritation treatment; and to provide an apparatus for the same. <P>SOLUTION: (1) The method for denitrification treatment of ammonium nitrogen and calcium-containing wastewater includes: a calcium concentration controlling step of controlling the calcium concentration in the ammonium nitrogen and calcium-containing wastewater according to the operation condition of the nitritation step; a nitritation step of fixing an ammonium oxidation bacterium to the carrier and for nitrating the wastewater in the presence of the wastewater obtained in the calcium concentration controlling step; and a denitrification step of denitrification of the wastewater containing nitrous acid and ammonium nitrogen obtained in the nitritation step. (2) The apparatus for denitrification treatment of the ammonium nitrogen and calcium-containing wastewater, carrying out the denitrification treatment of the ammonium nitrogen and calcium-containing wastewater of (1) and used for the calcium concentration controlling step, includes: an device for measuring the calcium concentration of the wastewater; a device for eliminating calcium; and a tank having a device for measuring an M-alkalinity concentration and an NH<SB POS="POST">4</SB>-N concentration. A device used in the nitritation step includes: a neutralizing agent-adding quantity-controlling device communicating with the device for measuring the M-alkalinity concentration and the NH<SB POS="POST">4</SB>-N concentration; and a nitritation tank having a neutralizing agent-injecting device communicating with the neutralizing agent-adding quantity-controlling device. A device used for the denitrification step includes a denitrification tank. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
