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Treatment of high-strength ethylene glycol waste water in an expanded granular sludge blanket reactor: use of PVA-gel beads as a biocarrier
- Source :
- SpringerPlus
- Publisher :
- Springer Nature
-
Abstract
- Industrial-scale use of polyvinyl alcohol (PVA)-gel beads as biocarriers is still not being implemented due to the lack of understanding regarding the optimal operational parameters. In this study, the parameters for organic loading rate (OLR), alkalinity, recycle rate, and addition of trace elements were investigated in an expanded granular sludge blanket reactor (EGSB) treating high-strength ethylene glycol wastewater (EG) with PVA-gel beads as biocarrier. Stable chemical oxygen demand (COD) removal efficiencies of 95 % or greater were achieved, and continuous treatment was demonstrated with appropriate parameters being an OLR of 15 kg COD/m(3)/day, NaHCO3 added at 400 mg/L, a recycle rate of 15 L/h, and no addition of trace elements addition. A biogas production yield rate of 0.24 m(3)/kg COD was achieved in this study. A large number of long rod-shaped bacteria (Methanosaeta), were found with low acetate concentration in the EGSB reactor.
- Subjects :
- 0106 biological sciences
Anaerobic
Multidisciplinary
biology
Cost
Research
Chemical oxygen demand
Alkalinity
010501 environmental sciences
Blanket
biology.organism_classification
Pulp and paper industry
Methanosaeta
01 natural sciences
Polyvinyl alcohol
chemistry.chemical_compound
chemistry
Wastewater
010608 biotechnology
Methanosarcina
Loading rate
Ethylene glycol
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 21931801
- Volume :
- 5
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- SpringerPlus
- Accession number :
- edsair.doi.dedup.....c1c0337eff6f668b244c209e806388be
- Full Text :
- https://doi.org/10.1186/s40064-016-2409-9