| 摘要 |
<p>PURPOSE:To stabilize the carrier fluidity condition in a tank in an early period by using stirring nozzles in the intermediate part of the tank and water spraying nozzles in the lower part of the tank by groups and making simultaneous parallel operation of many raw water pumps and circulating pumps transiently at the time of starting or restarting. CONSTITUTION:The carriers to which microorganisms are stuck are fluidized in the treatment tank 11 having a raw water inflow part 12 in the lower part, a treated water outflow part 29 in the upper part and a circulating water system 31 connecting the upper and lower parts, by which the org. matter in waste water is anaerobically treated and removed. Inflow water nozzles 14 are provided to the lower part of the treatment tank and the stirring nozzles 22 are disposed in the intermediate part of the treatment tank. The nozzles 14, 22 are further branched from a spraying water main pipe 16 through branch pipes 17, 24. Selector valves 18, 23 are interposed to the respective branch pipes branched from the main pipe 16 thereof. As a result, the satisfactory flow rates of the injection water are obtd. from the respective nozzles and the compacted carrier layers are fluidized discretely above and below, by which the carrier fluidity condition in the tank is stabilized in an early period.</p> |
