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Evaluation of process performance and retained sludge properties of a psychrophilic UASB reactor for treatment of iso-plophyl alcohol (2-propanol)-containing wastewater.
- Source :
-
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering [J Environ Sci Health A Tox Hazard Subst Environ Eng] 2018; Vol. 53 (13), pp. 1177-1184. Date of Electronic Publication: 2018 Dec 30. - Publication Year :
- 2018
-
Abstract
- In this study, a continuous feeding experiment was conducted with synthetic iso-plophyl alcohol (2-propanol)-containing wastewater using a lab-scale psychrophilic UASB reactor to evaluate process performance and retained sludge properties. For smooth acclimation, methanogenic granular sludge was seeded and a proportion of 2-propanol in the synthetic wastewater containing sucrose and volatile fatty acids was increased stepwise from 0% to 30%, 60% and then 90% of COD (chemical oxygen demand). As a result, after a 4-week period for acclimation to 2-propanol degradation, a COD removal rate of 95% was achieved at an organic loading rate (OLR) of 8.4 kg COD/m <superscript>3</superscript> /day. Additionally, the physical properties of the retained granular sludge were maintained even when the reactor was supplied with 2-propanol-rich wastewater for more than 200 days. From the batch assays using serum bottles, methanogenic degradation of 2-propanol was observed with acetone accumulation. By comparison, 2-propanol degradation was clearly inhibited in the presence of chloroform as a specific inhibitor of methanogen. A domain archaeal community structure analysis targeting 16S rRNA genes showed the relative abundance of the genus Methanospillium was increased in the 2-propanol acclimated sludge. These results suggested Methanospillium related species in the granular sludge appreciably contributed to the direct degradation of 2-proapanol into acetone under an anaerobic condition.
- Subjects :
- Archaea metabolism
Methane metabolism
Methanospirillum isolation & purification
Methanospirillum metabolism
RNA, Ribosomal, 16S genetics
RNA, Ribosomal, 16S isolation & purification
Waste Disposal, Fluid methods
Water Quality
2-Propanol analysis
Archaea isolation & purification
Bioreactors microbiology
Sewage chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1532-4117
- Volume :
- 53
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
- Publication Type :
- Academic Journal
- Accession number :
- 30596343
- Full Text :
- https://doi.org/10.1080/10934529.2018.1530334