| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate the necessity for stopping a wastewater treatment apparatus for a long time for the purpose of maintenance not only to facilitate maintenance but also to reduce a maintenance cost. SOLUTION: This wastewater treatment apparatus has an air source (air pump) 16 for supplying air to the propagation tank body 15 of a microorganism propagation tank B1, a control device 17 for controlling an air supply amt. and temp. and a water supply pipe 18 for supplying fresh water and, further, has a contact material housing part 21 packed with a contact material having a nutrient source of aerobic microorganisms in the propagation tank main body 15 and a bio-cartridge 20 for culturing aerobic microorganisms is mounted in a freely detachable manner and a microorganism supply pipe 26 is connected to a wastewater treatment tank B2 into which raw water is introduced.</p> |
