| Full text | |
| Author(s): |
Silveira, Natalia Carolina
[1]
;
Oliveira, Guilherme Henrique Duarte
[1]
;
Damianovic, Marcia Helena Rissato Zamariolli
[1]
;
Foresti, Eugenio
[1]
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Sao Carlos Sch Engn, Ctr Res Dev & Innovat Environm Engn, Lab Biol Proc, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Journal of Environmental Management; v. 296, OCT 15 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The production of inputs for animal feed using slaughterhouse byproducts is a predominant waste valorization route of the meat industry. This practice generates complex effluents containing high concentrations of organic matter and nutrients. The partial nitrification process followed by the Anammox process (PN/A) has been shown to be a viable technology for nitrogen removal from wastewaters with high concentrations of ammonia and low COD/N ratios, as found in Upflow Anaerobic Sludge Blanket (UASB) effluent from animal feed inputs industries. However, its application has not been assessed for slaughterhouse byproducts processing wastewaters. This work aimed at evaluating the influence of the nitrogen loading rate (NLR) on the removal of total nitrogen (TN) of a PN/A process treating real animal feed industry wastewater. The NLR in the Anammox reactor varied from 1.3 to 6.3 g N L-1.d(-1), with a constant COD/N ratio of 0.5 +/- 0.1 mg COD.mg N-1. An average removal efficiency of TN of 84.2 +/- 9.8% was observed throughout 440 days of operation. Microbiological analyses of the granular Anammox sludge performed before and after the operation revealed an increase in the population of heterotrophic denitrifying bacteria, while the relative abundance of Anammox species decreased. It was demonstrated that although both microbial groups can coexist synergistically, the presence of organic matter contributed to the growth of heterotrophic denitrifying species and impaired the growth of Anammox bacteria, without affecting system performance. (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 |