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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.)

Establishing simultaneous nitrification and denitrification under continuous aeration for the treatment of multi-electrolytes saline wastewater

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Author(s):
Macedo, Williane Vieira [1] ; Santos, Carla E. D. [1] ; Solcia Guerrero, Renata de Bello [1] ; Sakamoto, Isabel K. [1] ; Cavalcante de Amorim, Eduardo Lucena [2] ; Azevedo, Eduardo Bessa [3] ; Damianovic, Marcia Helena R. Z. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Biol Proc Lab LPB, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil
[2] Univ Fed Alagoas, Technol Ctr, Av Lourival Melo Mota, BR-57072900 Maceio, AL - Brazil
[3] Univ Sao Paulo, Environm Technol Dev Lab LTDAmb, 400 Trab Sao Carlense Ave, BR-13563120 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Bioresource Technology; v. 288, SEP 2019.
Web of Science Citations: 2
Abstract

Simultaneous nitrification and denitrification (SND) was established under continuous aeration (6 mgO(2) L-1) aiming at achieving a feasible and simple operational strategy for treating multi-electrolyte saline wastewaters. Two Structured Fixed-Bed Reactors (SFBR) were used to assess SND performance with (Saline Reactor, SR) and without (Control Reactor, CR) salinity interference. Salinity was gradually increased (from 1.7 to 9 atm) based on the composition of water supplied in arid regions of Brazil. At 1.7 atm, N-NH4+ oxidation and Total Nitrogen (TN) removal efficiencies of 95.9 +/- 2.8 and 65.76 +/- 7.5%, respectively, were obtained. M osmotic pressure (OP) of 9 atm, the system was severely affected by specific salt toxicity and OP. High chemical oxygen demand (COD) removal efficiency was achieved at all operational conditions (97.2 +/- 1.6 to 78.5 +/- 4.6%). Salinity did not affect microbial diversity, although it modified microbial structure. Halotolerant genera were identified (Prosthecobacter, Chlamydia, Microbacterium, and Paenibacillus). (AU)

FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants