Publication: Buffering capacity in an anaerobic baffled reactor treating carbohydrateprotein wastewater
Issued Date
2009-01-01
Resource Type
ISSN
19443986
19443994
19443994
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2-s2.0-77954198182
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Mahidol University
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SCOPUS
Bibliographic Citation
Desalination and Water Treatment. Vol.4, No.1-3 (2009), 274-280
Suggested Citation
Apaporn Ruchiraset, Sopa Chinwetkitvanich Buffering capacity in an anaerobic baffled reactor treating carbohydrateprotein wastewater. Desalination and Water Treatment. Vol.4, No.1-3 (2009), 274-280. doi:10.5004/dwt.2009.491 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/27574
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Title
Buffering capacity in an anaerobic baffled reactor treating carbohydrateprotein wastewater
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Abstract
A 10-L working volume of an anaerobic baffled reactor (ABR) with three, six and eight compart-ments using an organic loading rate of 4 g COD/l-d (named as 3C-OLR4, 6C-OLR4, and 8C-OLR4 experiments, respectively) was used. COD removal efficiencies of 74%, 78% and 83% were accomplished, respectively. The effluent pH and alkalinity values were maintained around 7.9 and 2000 mg/l as CaCO3, respectively, and the effluent VFA concentrations were mostly less than 500 mg/l as CaCO3. This resulted in a low VFA/alkalinity ratio (less than 0.4), which indicated that the system had a high buffering capacity with only 2000 mg/l as CaCO3alkalinity concentration. Subsequently, the eight-compartment ABR was selected to further investigate the effect of organic loading rates (OLRs) of 8, 12, 16 g COD/l-d (8C-OLR8, 8C-OLR12, 8C-OLR16). The same influent alkalinity (2000 mg/l) was applied to these three OLRs. The effluent pH values of those remained in the range of 8.1-8.5 and the effluent alkalinity concentrations were around 2500 mg/l as CaCO3. This signifies that the alkalinity requirement in the ABR treating carbohydrate-protein wastewater would be reduced, resulting in chemical cost reduction. © 2009 Desalination Publications.