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Anaerobic treatment of chocolate-processing industry wastewater at different organic loading rates and temperatures.

08:00 EDT 1st June 2019 | BioPortfolio

Summary of "Anaerobic treatment of chocolate-processing industry wastewater at different organic loading rates and temperatures."

The objective of the present study was to determine the optimum operating temperature of laboratory-scale upflow anaerobic sludge blanket (UASB) reactors during the treatment of a chocolate-processing industry wastewater at medium applied organic loading rates (OLR). Four UASB reactors were operated at different temperature (15, 20, 25 and 30 °C) and three OLR (2, 4 and 6 kg soluble chemical oxygen demand (COD)/(m d)). The flowrate and the hydraulic retention time were constant (11.5 L/d and 6 h, respectively). The monitored parameters were pH, temperature, COD, and total and volatile suspended solids. The COD removal efficiency (RE) and biogas production rate (BPR) were calculated. The 15 °C UASB reactor had the lowest RE (39 to 78%) due to the low operating temperature. Regardless of the OLR, the RE of the 20, 25 and 30 °C reactors was high and similar to each other (between 88 and 94%). The BPR of the four UASB reactors had the same behaviour as the RE (BPR of 15 °
C:
0.3 to 0.5 L/(L d) (L/(L d)) and BPR of 20, 25 and 30 °
C:
0.5 to 1.9 L/(L d)).

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Journal Details

This article was published in the following journal.

Name: Water science and technology : a journal of the International Association on Water Pollution Research
ISSN: 0273-1223
Pages: 2251-2259

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