| 摘要 |
PROBLEM TO BE SOLVED: To obtain the prescribed transparency of a separating liquid while regulating an amount of injection of sludge and an amount of injection of a flocculant according to the concentration or transparency of the sludge to be injected to a sludge dewatering machine through a sludge flow passage from a sludge storage tank or the separating liquid separated from the sludge dewatering machine. SOLUTION: The waste water treatment equipment comprises the sludge storage tank 26 which stores the sludge 22, a flocculant storage tank 32 which stores the flocculant 24, the sludge dewatering machine 23 which dewaters the sludge 22, a sludge injection pump 31 which is disposed in the passage 27 from the tank 26 and injects the sludge 22 in the tank 26 to the machine 23, and a flocculant injection pump 35 which is disposed in a flocculant flow passage 34 from the tank 32 and injects the flocculant 24 in the tank 32 to the machine 23. The equipment is equipped with a sludge densitometer 30 which is disposed in the passage 27 and detects the concentration of the sludge passing the passage 27 and a concentration controller 38 which operates at least one of the pump 31 and the pump 35 according to the concentration of the sludge 22 detected by the densitometer 30 and can control the concentration of the sludge 22 to be injected to the machine 23. COPYRIGHT: (C)2004,JPO
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