Patent ID: 11866348
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method for treating a wastewater stream to produce an effluent stream without periodically drawing samples for testing, the method comprising:
supplying, by a pump, a chemical additive to the wastewater stream at a variable flow rate;
measuring, by a sensor disposed within the wastewater stream, clarity of the wastewater stream continuously to produce a series of clarity measurements over an interval of time;
measuring, by a flow meter disposed within the wastewater stream, flow of the wastewater stream continuously to produce a series of flow measurements over the interval of time;
varying, by a controller, the variable flow rate at which the chemical additive is supplied to the wastewater stream based on an analysis of (i) the series of clarity measurements generated by the sensor and (ii) the series of flow measurements generated by the flow meter, such that the controller is able to address, in real time,
(a) changes in the clarity of the wastewater stream that are not accompanied by a corresponding change in the flow of the wastewater stream to limit underdosing,
(b) changes in the flow of the wastewater stream that are not accompanied by a corresponding change in the clarity of the wastewater stream to limit overdosing, and
(c) changes in the clarity of the wastewater stream that are accompanied by a corresponding change in the flow of the wastewater stream; and

maintaining clarity of the effluent stream within a specified range of values by continuously supplying, by the pump, the chemical additive into the wastewater stream in accordance with the variable flow rate as determined by the controller.