Construction, real-time monitoring and advanced control application to dissolved air flotation system to water treatment aiming energy saving

• Grant number: 15/05207-8
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2015
• End date: November 30, 2017
• Field of knowledge: Engineering - Chemical Engineering - Industrial Operations and Equipment for Chemical Engineering
• Principal Investigator: Flávio Vasconcelos da Silva
• Grantee: Flávio Vasconcelos da Silva
• Host Institution: Faculdade de Engenharia Química (FEQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Flotation is applied to water treatment and is a relative simple process. Rely on suspended particles remove by attachment to air micro-bubbles of 30-100 m diameter range, reducing particles density. Therefore, air is dissolved in water inside a vessel over pressure and then injected in flotation tank after a abrupt pressure drop. Pressure and total liquid flow in saturation vessel have to be manipulated to keep micro-bubbles size and guarantee suspended material separation. In this work, a flotation prototype will be constructed to investigate the relationship between the manipulated variables in control and automation of flotation process, designing multi-variable control loops with artificial intelligence to actuate on saturation vessel operate conditions aiming clarified water turbidity control and, thus, in attempt to reduce energy consumption and also actuators effort control. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FONSECA, RODOLPHO R.; THOMPSON, JOSE P., JR.; FRANCO, IVAN C.; DA SILVA, FLAVIO V.. Automation and Control of a Dissolved Air Flotation Pilot Plant. IFAC PAPERSONLINE, v. 50, n. 1, p. 6-pg., 2017-01-01. (15/05207-8)

FONSECA, RODOLPHO RODRIGUES; FRANCO, IVAN CARLOS; THOMPSON, JR., JOSE PEDRO; DA SILVA, FLAVIO VASCONCELOS. Turbidity control on dissolved air flotation process using fuzzy logic. WATER SCIENCE AND TECHNOLOGY, v. 78, n. 12, p. 2586-2596, DEC 2018. (15/05207-8)