Anaerobic treatment of winery wastewater using laboratory-scale multi- and single-fed filters at ambient temperatures |
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Authors: | Han-Qing Yu Quan-Bao Zhao Yong Tang |
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Affiliation: | aSchool of Chemistry, University of Science & Technology of China, Hefei 230026, China |
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Abstract: | A lab-scale investigation was conducted to examine the effectiveness of a multi-fed upflow anaerobic filter process for the methane production from a rice winery effluent at ambient temperatures. The experiment was carried in two identical 3.0-l upflow filters, a single-fed reactor and a multi-fed reactor. The results showed that the multi-fed reactor, operated at the ambient temperatures of 19–27 °C and influent chemical oxygen demand (COD) of 8.34–25.76 g/l, could remove over 82% of COD even at an organic loading rate (OLR) of 37.68 g-COD/l d and a short hydraulic retention time (HRT) of 8 h. This reactor produced biogas with a methane yield of 0.30–0.35 l-CH4/g-CODremoved. The multi-fed upflow anaerobic filter was proved to be more efficient than the single-fed reactor in terms of COD removal efficiency and stability against hydraulic loading shocks. A linear-regression model with influent COD concentration and HRT terms adequately described the multi-fed upflow anaerobic filter system for the treatment of rice winery wastewater at ambient temperatures. |
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Keywords: | Ambient temperatures Anaerobic digestion Multi-flow Single-flow Upflow anaerobic filter Winery wastewater |
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