| 摘要 |
PROBLEM TO BE SOLVED: To provide a means efficiently eliminating nitrogen in wastewater with a reduced operating cost.SOLUTION: There are provided mixed bacteria comprise at least anammox bacteria with a performance at least eliminating 80% of nitrogen within 2 h of hydraulic retention time. The mixed bacteria include anammox bacteria so as to convert ammoniac nitrogen and nitrite-nitrogen in the wastewater into nitrogen gas, and consequently nitrogen is removed from wastewater. By intensively cultivating the anammox bacteria or sludge containing anammox bacteria, nitrogen load can be treated at 5-10 Kg/m/day. The nitrogen in wastewater, etc. can be efficiently treated in comparatively large scale in a short period. A high performance and large scaled treatment of wastewater is attained by using the mixed bacteria. |
