Journal
BIORESOURCE TECHNOLOGY
Volume 237, Issue -, Pages 204-212Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.02.058
Keywords
UASB-DHS system; Natural rubber processing wastewater; 16S rRNA gene sequencing; Greenhouse gases emission
Funding
- JST/JICA
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [15J12291] Funding Source: KAKEN
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A pilot-scale upflow anaerobic sludge blanket (UASB)-downflow hanging sponge system (DHS) combined with an anaerobic baffled reactor (ABR) and a settling tank (ST) was installed in a natural rubber processing factory in South Vietnam and its process performance was evaluated for 267 days. The UASB reactor achieved a total removal efficiency of 55.6 +/- 16.6% for chemical oxygen demand (COD) and 77.8 +/- 10.3% for biochemical oxygen demand (BOD) with an organic loading rate of 1.7 +/- 0.6 kg-COD.m(3).day(1). The final effluent of the proposed system had 140 +/- 64 mg.L-1 of total COD, 31 +/- 12 mg.L-1 of total BOD, and 58 +/- 24 mg-N.L-1 of total nitrogen. The system could significantly reduce 92% of greenhouse gas emissions and 80% of hydraulic retention times compared with current treatment systems. (C) 2017 Published by Elsevier Ltd.
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