| 摘要 |
<p>PURPOSE:To stabilize the treating work of a next procedure by a method wherein, in case of transferring a treated sludge of a sludge concentrating tank to a receiving tank, a water level of a receiving tank and a withdrawn sludge concn. are measured and, when one of these values is different from a set value, the sludge sending is stopped. CONSTITUTION:In case of sending an initially precipitated sludge 11a withdrawn from the first precipitating pond and an excessive sludge 13a withdrawn from a final precipitating pond to a concentrating tank 2 and transfering the sludge precipitated in a hopper 2A to a receiving tank 5 through a withdrawing pump 14, a valve 15 is intermittently colsed and a valve 16 is opened to sample a treated sludge and the sludge concn. is measured by a concn. meter 17 to apply the concn. signal 17a to a controlling apparatus 18. When the said value is within a preliminarily set concn. range as well as a water level signal 19a detected by a water level meter 19 within a receiving tank is below a set water level, a valve 15 is opened by the order of a controlling apparatus and a valve 16 is closed to carry out the sludge sending. By this method, the next procedure can be effectively carried out.</p> |
