Elemental sulphur recovery from wastewater in anaerobic-microaerobic combined reactor

• Grant number: 11/22904-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2012
• End date: October 31, 2015
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal Investigator: Marcelo Zaiat
• Grantee: Priscila Rosseto Camiloti
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated, AP.TEM
• Associated scholarship(s): 13/13131-6 - Sulfate reduction and sulfide oxidation in an UASB reactor combined to a micro-aerobic reactor, BE.EP.DR

Abstract

The anaerobic processes for wastewater treatment are widely distributed. However, if used in water with the presence of sulfate this element is reduced to sulfide, resulting in corrosion of pipes, bad odor and health problems. Thus, a treatment that combines the reduction of sulfate and sulfide produced is very important. Within this context, oxidation of sulfide to elemental sulfur becomes interesting as it can be removed by sedimentation and further behind economic advantages with its recovery and subsequent use by industry. The process of oxidation of sulfide to elemental sulfur is performed under low oxygen concentrations, and then it is necessary to control the oxygen concentration in the liquid medium. In this case, the use of porous polymeric membrane, like silicon tubes, is a low cost alternative that promotes the microaeration of the medium. Based on these premises, is proposed in this paper a sulfidogenic/microaerobic combined reactor responsible for removal of organic matter coupled with sulfate reduction and oxidation of sulfide to elemental sulfur. The treatment of the effluent gas will be done through the absorption in alkaline solution for later treatment also in microerobic reactor. In a last step will assess the recovery of elemental sulfur by a process of coagulation and sedimentation.

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)

CAMILOTI, PRISCILA ROSSETO; VALDES, FREDDY; DELFORNO, TIAGO PALLADINO; BARTACEK, JAN; ZAIAT, MARCELO; JEISON, DAVID. A membrane aerated biofilm reactor for sulfide control from anaerobically treated wastewater. ENVIRONMENTAL TECHNOLOGY, v. 40, n. 18, p. 2354-2363, AUG 11 2019. (09/15984-0, 13/13131-6, 11/22904-3)

VALDES, F.; CAMILOTI, P. R.; RODRIGUEZ, R. P.; DELFORNO, T. P.; CARRILLO-REYES, J.; ZAIAT, M.; JEISON, D.. Sulfide-oxidizing bacteria establishment in an innovative microaerobic reactor with an internal silicone membrane for sulfur recovery from wastewater. BIODEGRADATION, v. 27, n. 2-3, p. 119-130, JUN 2016. (09/15984-0, 11/22904-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CAMILOTI, Priscila Rosseto. Elemental sulfur recovery from wastewater in anaerobic/micro-aerobic reactors. 2015. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.