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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Simultaneous nitrification-denitrification (SND) using a thermoplastic gel as support: pollutants removal and microbial community in a pilot-scale biofilm membrane bioreactor

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Salcedo Moyano, Alvaro Javier [1] ; Delforno, Tiago Palladino [2] ; Subtil, Eduardo Lucas [1]
Total Authors: 3
[1] Fed Univ ABC UFABC, Engn Modeling & Appl Social Sci Ctr CECS, 5001 Av Estados, BR-09210580 Santo Andre, SP - Brazil
[2] Campinas Univ UNICAMP, Res Ctr Chem Biol & Agr CPQBA, Microbial Resources Div, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 3

In this study, experiments were carried out to treat sanitary wastewater in a biofilm membrane bioreactor using a thermoplastic gel as a support to assist the nitrification-denitrification process. For this purpose, the system was operated in two different dissolved oxygen concentrations (2.3 +/- 0.2 and 0.9 +/- 0.3 mg O-2/L for Phases I and II, respectively) and the removal of organic compounds and nitrogen, as well as the microbial community in suspended biomass and biofilm were evaluated. The MB-MBR system was able to withstand raw wastewater variations and maintaining a low permeate COD concentration (18 mg/L) even at low DO concentrations. On the other hand, it was found that oxygen concentration significantly influenced the process of nitrogen conversion. In Phase I the average removal of total nitrogen was 18 +/- 8%, while in Phase II it increased to 66 +/- 11%. The denitrification rate was two times higher (7.8 mg NO3--N/h) at low dissolved oxygen, with a significant contribution of the biofilm (41%). Additionally, the high-throughput 16S rDNA sequencing showed that the oxygen concentration was determinant for arrangement patterns of the samples and not the sampling site (suspended biomass and support material). Thiothrix, Comamonas, Rhodobacter, Mycobacterium, Thermomonas, Sphingobium, Sphigopyxis, Pseudoxanthomonas, Nitrospira and, Novosphingobium were the main genera regarding the nitrogen cycle. {[}GRAPHICS] (AU)

FAPESP's process: 16/23684-0 - A new approach to wastewater treatment and water and energy recovery: development of an electrochemical conductive membrane bioreactor (EcMBR) operated under Simultaneous Nitrification and Denitrification (SND) condition
Grantee:Eduardo Lucas Subtil
Support Opportunities: Regular Research Grants