| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique capable of treating an organic component or nitrogen component contained in a remaining liquid after methane fermentation at a low cost while enhancing the treatment efficiency of wastewater by methane fermentation by separating and recovering the organic component contained in organic wastewater and effectively putting the organic component to practical use in the recovery of energy and the biological denitrification treatment of wastewater. <P>SOLUTION: An organic solid substance 102 with a particle size of a predetermined value or above is separated from the organic wastewater 101 to be subjected to methane fermentation treatment S3, the organic wastewater separated liquid 103 separated from the organic solid substance 102 is added to a methane fermentation remaining liquid 105 after the methane fermentation treatment S3, and the mixed liquid 106 of the organic wastewater separated liquid 103 and the methane fermentation remaining liquid 105 is subjected to the biological denitrification treatment S5. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
