A novel comparative study of modified carriers in moving bed biofilm reactor for the treatment of wastewater: Process optimization and kinetic study.
Bioresour Technol
; 281: 335-342, 2019 Jun.
Article
em En
| MEDLINE
| ID: mdl-30831512
ABSTRACT
In this work, modified plastic carriers; polypropylene (PP), low-density polyethylene- polypropylene (LDPE-PP), and polyurethane foam-polypropylene (PUF-PP) were developed and used in moving bed bioreactor (MBBR) for the wastewater treatment containing naphthalene. To optimized the process parameters using response surface methodology (RSM), two numerical variables; pH (5.0-9.0) and hydraulic retention time (HRT) (1.0-5.0â¯day) along with the type of carriers (PP, LDPE-PP, and PUF-PP) were selected as a categorical factor. At 7.0 pH and 5â¯days HRT, maximum removal efficiencies were observed to be 72.4, 84.4, and 90.2% for MBBR packed with PP, LDPE-PP, and PUF-PP carriers, respectively. Gas chromatography-mass spectrometry (GC-MS) analysis reveals catechol and 2-naphthol were observed as intermediate metabolites for naphthalene degradation. Modified Stover-Kincannon model was applied for biodegradation kinetic and constants were observed as Umax 0.476, 0.666, and 0.769â¯g/L.day and KB 0.565, 0.755, and 0.874â¯g/L.day for PP, LDPE-PP, PUF-PP, respectively.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Eliminação de Resíduos Líquidos
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Biofilmes
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Reatores Biológicos
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Águas Residuárias
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article