A study on the treatment efficiency of internal circulation biological aerated filters for refinery wastewater and the transformation of main organic pollutants.
Environ Sci Pollut Res Int
; 27(18): 22902-22912, 2020 Jun.
Article
em En
| MEDLINE
| ID: mdl-32328999
ABSTRACT
In this study, an internal circulation biological aerated filter (ICBAF) reactor was applied to pretreat refinery wastewater containing large amounts of organic pollutants. According to the composition change of inlet-and-outlet water, the main organic pollutants, including micromolecular organic-acids, aldehydes, ketones, phenols, and so forth, degraded well in ICBAF unit. The concentration of organic acids, alcohols, and esters changed from 648 to 90 mg/L, 130 to 90 mg/L, and 158 to 228 mg/L, respectively. The average removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD5) reached 54.62% and 83.64%, respectively. It was clear that the concentration of effluent organic acids in the ICBAF unit decreased significantly. The degradation process of organic acids, alcohols, and esters (among others) and the degradation pathway of organic acids were also discussed. Straight chain organic acids and naphthenic acids were degraded by α-oxidation, ß-oxidation, α- and ß-combined oxidation, or aromatization. The study demonstrates the potential of the ICBAF as an alternative for the high-efficiency pretreatment of refinery wastewater.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Contexto em Saúde:
2_ODS3
Problema de saúde:
2_enfermedades_transmissibles
/
2_quimicos_contaminacion
Assunto principal:
Poluentes Químicos da Água
/
Poluentes Ambientais
Idioma:
En
Revista:
Environ Sci Pollut Res Int
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article