Back to Search Start Over

Remoção de macronutrientes de efluente da indústria de castanha de caju por uso de reator aeróbio em batelada com inóculo fúngico Removal of macronutrients from effluent of a cashew nut industry by using a batch aerobic reactor with fungal inoculums

Authors :
Marina Santos da Silva Lopes
Patrícia Celestino Carvalho de Oliveira
Marcus Vinícius Freire Andrade
Rinaldo dos Santos Araújo
Glória Marinho
Kelly Rodrigues
Source :
Engenharia Sanitaria e Ambiental, Vol 16, Iss 1, Pp 17-26 (2011)
Publication Year :
2011
Publisher :
Brazilian Association of Sanitary and Environmental Engineering, 2011.

Abstract

Foi estudada a eficiência da remoção de nitrogênio e fósforo do efluente de indústria de castanha de caju, por uso de reator aeróbio em batelada com inóculo de Aspergillus niger AN400. O reator recebeu 5 L de água residuária, acrescida de glicose, na concentração de 1 g.L-1 (Etapa I) e de 5 g.L-1 (Etapa II ). Cada etapa teve seis ciclos operacionais, cada um com tempo de reação total de sete dias. Os valores de pH dos efluentes na Etapa I variaram de 6,4 a 8,7 e na Etapa II , de 3,1 a 7,0. Durante a Etapa II , o reator alcançou bons resultados para remoção de nutrientes sem acúmulo de sua concentração no meio: 49% de fósforo total, 60% de ortofosfato, 79% de amônia, 78% de nitrato e 90% de nitrito, indicando que a menor liberação de nutrientes pelos micro-organismos ocorreu na presença de concentração elevada de glicose.It was studied the removal efficiency of nitrogen and phosphorus from effluent of a cashew nut industry by using an aerobic reactor operated in repetitive batch, inoculated with Aspergillus niger AN400. The reactor was fed with 5 L of wastewater, supplemented with glucose in the concentration of 1 g.L-1 (Phase I) and 5 g.L-1 (Phase II ). Each phase had six operational cycles, with total reaction time of seven days per cycle. The pH values of the effluents in Phase I varied from 6.4 to 8.7 and in Phase II , it varied from 3.1 to 7.0. The reactor achieved good results of removal without nutrients accumulated in the medium, during Phase II : 49% to total phosphorus, 60% to orthophosphate, 79% to ammonia, 78% to nitrate, and 90% to nitrite, indicating that the lesser release of nutrients by microorganisms occurred in the presence of higher glucose concentration.

Details

Language :
English
ISSN :
18094457 and 14134152
Volume :
16
Issue :
1
Database :
OpenAIRE
Journal :
Engenharia Sanitaria e Ambiental
Accession number :
edsair.doajarticles..a5da789eac81bd7834b90c1583c51fc5