Dissolved oxygen control device and method for sewage treatment system

• Main Authors: FAN PENGCHAO, JIAO ERLONG, LIU YAO, ZHANG HUI, WANG JIAWEI, YUAN XING, JIANG YONG, LI QUN, MENG XIAOYU
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2021
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a dissolved oxygen control device and method for a sewage treatment system, belonging to the technical field of sewage treatment. The method comprises the following steps: measuring sewage flow via a fluid flowmeter, and calculating the lag time length of a water volume according to the sewage flow within a set time length; respectively acquiring a second required aeration amount and a third required aeration amount of a second aeration tank and a third aeration tank within the set time length; acquiring a second actual gas supply amount in the second aeration tank and a third actual gas supply amount in the third aeration tank every time the second required aeration amount and the third required aeration amount are obtained and the water volume lags for the time length; and controlling the opening degrees of a second regulating valve and a third regulating valve according to difference values between the second actual gas supply amount and the second required aeration amount and betwe