Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Degradation of Phenolic Compounds in Palm Oil Mill Effluent by Silica‐Immobilized Bacteria in Internal Loop Airlift Bioreactors
Palm oil mill effluent (POME) is usually treated using biological systems. However, phenolic compounds remain in the treated POME. This study aimed to remove phenolic compounds from POME using silica‐immobilized Methylobacterium sp. NP3 and Acinetobacter sp. PK1. Treated POME samples were collected from the final stabilization ponds of two palm oil mills in Thailand. In batch experiments, the silica‐immobilized bacteria effectively degraded 100–500 mg/L phenolic compounds (e.g., caffeic acid, ferulic acid, 4‐hydroxybenzoic acid, catechol, and 3‐methylcatechol) in synthetic wastewater and completely removed up to 1000 mg/L amended phenol from both treated POME samples. When 25 g/L silica‐immobilized bacteria were used in an internal loop airlift bioreactor with a hydraulic retention time of 5 h, 83 and 60% of the initial 26.7 and 112 mg/L phenolic compounds in the treated POME samples were removed. The bioreactor was operated continuously for 1200 h, and scanning electron microscopy revealed that the bacteria remained trapped inside the silica matrix. This bioreactor could be used for post‐treatment of POME.
Degradation of Phenolic Compounds in Palm Oil Mill Effluent by Silica‐Immobilized Bacteria in Internal Loop Airlift Bioreactors
Palm oil mill effluent (POME) is usually treated using biological systems. However, phenolic compounds remain in the treated POME. This study aimed to remove phenolic compounds from POME using silica‐immobilized Methylobacterium sp. NP3 and Acinetobacter sp. PK1. Treated POME samples were collected from the final stabilization ponds of two palm oil mills in Thailand. In batch experiments, the silica‐immobilized bacteria effectively degraded 100–500 mg/L phenolic compounds (e.g., caffeic acid, ferulic acid, 4‐hydroxybenzoic acid, catechol, and 3‐methylcatechol) in synthetic wastewater and completely removed up to 1000 mg/L amended phenol from both treated POME samples. When 25 g/L silica‐immobilized bacteria were used in an internal loop airlift bioreactor with a hydraulic retention time of 5 h, 83 and 60% of the initial 26.7 and 112 mg/L phenolic compounds in the treated POME samples were removed. The bioreactor was operated continuously for 1200 h, and scanning electron microscopy revealed that the bacteria remained trapped inside the silica matrix. This bioreactor could be used for post‐treatment of POME.
Degradation of Phenolic Compounds in Palm Oil Mill Effluent by Silica‐Immobilized Bacteria in Internal Loop Airlift Bioreactors
Khongkhaem, Piyamart (Autor:in) / Suttinun, Oramas (Autor:in) / Intasiri, Amarawan (Autor:in) / Pinyakong, Onruthai (Autor:in) / Luepromchai, Ekawan (Autor:in)
CLEAN – Soil, Air, Water ; 44 ; 383-392
01.04.2016
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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