Effect of las loading rate on its removal efficiency by co-digestion of commercial laundry wastewater and domestic sewage in a pilot scale EGSB reactor

• Grant number: 16/11948-3
• Support type: Scholarships in Brazil - Master
• Effective date (Start): September 01, 2016
• Effective date (End): September 30, 2017
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal researcher: Maria Bernadete Amâncio Varesche
• Grantee: Alana Gandra Lima de Moura
• Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery, AP.TEM

Abstract

Given its toxicity and high concentration on effluents, the study of biological removal of Linear Alkylbenzene Sulfonate (LAS) from wastewaters has become attractive. Although previous studies already provided useful data regarding LAS co-digestion in laundry wastewater with synthetic co-substrates. It is necessary to study alternatives, such as co-digestion with sewage. The present study intend to evaluate the efficiency of biological LAS removal from laundry wastewater diluted in sewage, using an EGSB pilot scale reactor, with different LAS applied loads (LAL). The reactor will be kept in mesophilic temperature (30 ºC) and it will be operated with a hydraulic retention time (HRT) of 40 h. Monitoring physical-chemical analyses will be held, such as pH, alkalinity, Chemical Oxygen Demand (COD), LAS removal efficiency, nitrate, sulphate, sulphide and effluent solids concentration. The operational stages will be divided in adaptation of the sludge with domestic sewage, and laundry wastewater dilution in domestic sewage in order to obtain 5, 20 and 45 mgLAS L-1 on reactor feeding. On the end of each operational stage, granulometry, LAS adsorbed on sludge, and RNAr 16s gene sequencing of microbial community will be assessed. (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)

MOURA, A. G. L.; CENTURION, V. B.; OKADA, D. Y.; MOTTERAN, F.; DELFORNO, T. P.; OLIVEIRA, V. M.; VARESCHE, M. B. A. Laundry wastewater and domestic sewage pilot-scale anaerobic treatment: Microbial community resilience regarding sulfide production. Journal of Environmental Management, v. 251, DEC 1 2019. Web of Science Citations: 0.

CENTURION, V. B.; MOURA, A. G. L.; DELFORNO, T. P.; OKADA, D. Y.; DOS SANTOS, V. P.; VARESCHE, M. B. A.; OLIVEIRA, V. M. Anaerobic co-digestion of commercial laundry wastewater and domestic sewage in a pilot-scale EGSB reactor: The influence of surfactant concentration on microbial diversity. INTERNATIONAL BIODETERIORATION & BIODEGRADATION, v. 127, p. 77-86, FEB 2018. Web of Science Citations: 14.

Academic Publications

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

MOURA, Alana Gandra Lima de. Surfactant removal from commercial laundry wastewater in co-digestion with domestic sewage using a pilot scale anaerobic reactor. 2017. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.