| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide biological treatment method and apparatus of organic waste water in which the organic waste water is performed by anaerobic treatment, then performed by aerobic treatment by a first aerobic tank, then performed by predation of bacteria by protozoan and metazoan in a second aerobic tank, and further the protozoan and the metazoan are made to dominate in the second aerobic tank, and thereby hardly cohesiveness SS derived from the anaerobic treatment is reduced.SOLUTION: In an anaerobic biological treatment process, anaerobic treatment is performed so that a CODcr volume load of the aerobic biological treatment process total may become at most 10 kg/m/d, and a soluble CODcr volume load thereof may become at most 5 kg/m/d, and aerobic treatment is performed in a first aerobic tank so that burden of a first aerobic treatment water SS to a carrier of a second aerobic tank may become at most 15 kg-SS/m-carrier/d.</p> |
