Impact of chemical coagulation on the removal of organic compounds in effluent treated by activated sludge process

• Grant number: 12/04464-9
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2012
• End date: June 30, 2014
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal Investigator: Sidney Seckler Ferreira Filho
• Grantee: Sidney Seckler Ferreira Filho
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The main objective of wastewater treatment is the removal of organic matter and nutrients, enabling the production of a treated effluent that will allow its release into receiving water bodies. The biological treatment based on activated sludge techniques it is the most common in Brazil and worldwide, reaching a removal of the organic matter up to 90%, leaving, however, residual organic compounds from the metabolism and lyses of the organisms used in the treatment. The reuse of treated effluent, after application of a post-treatment process, for industrial or agriculture use, has been seen as an alternative to a more sustainable use of water resources. The known post-treatment systems reduce the organic matter to a level where conventional methods of quantification of the organic matter, such as biochemical oxygen demand (BOD), may not express the real presence of these organic compounds after the post-treatment. Therefore, methods such as molecular weight distribution have been tested for the characterization of the organic matter present in the liquid phase when subjected to the so-called tertiary treatment processes. Taking these factors into consideration, this project aims the characterization of wastewater treated by activated sludge processes subjected to physical and chemical treatment units consisting of coagulation, flocculation and sedimentation, especially with respect to its effect on removal of organic compounds in effluents treated by biological treatment. (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)

GUIMARAES, NATALIA RODRIGUES; DORR, FABIANE; MARQUES, RODRIGO DE OLIVEIRA; PINTO, ERNANI; FERREIRA FILHO, SIDNEY SECKLER. Removal efficiency of dissolved organic matter from secondary effluent by coagulation-flocculation processes. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, v. 56, n. 2, p. 161-170, DEC 14 2020. (12/04464-9, 14/50420-9, 13/07914-8)

GUIMARAES, NATALIA RODRIGUES; FERREIRA FILHO, SIDNEY SECKLER; HESPANHOL, BRUNO PIOTTO; PIVELI, ROQUE PASSOS. Evaluation of chemical sludge production in wastewater treatment processes. Desalination and Water Treatment, v. 57, n. 35, p. 16346-16352, 2016. (12/04464-9)