A pilot-scale experiment of natural rubber processing wastewater treatment was conducted using a combination system consisting of a two-stage up-flow anaerobic sludge blanket (UASB) and a down-flow hanging sponge (DHS) reactor for more than 10 months. The system achieved a chemical oxygen demand (COD) removal efficiency of 95.7% ± 1.3% at an organic loading rate of 0.8 kgCOD/(m3.d). Bacterial activity measurement of retained sludge from the UASB showed that sulfate-reducing bacteria (SRB), especially hydrogen-utilizing SRB, possessed high activity compared with methane-producing bacteria (MPB). Conversely, the acetate-utilizing activity of MPB was superior to SRB in the second stage of the reactor. The two-stage UASB–DHS system can reduce power consumption by 95% and excess sludge by 98%. In addition, it is possible to prevent emissions of greenhouse gases (GHG), such as methane, using this system. Furthermore, recovered methane from the two-stage UASB can completely cover the electricity needs for the operation of the two-stage UASB–DHS system, accounting for approximately 15% of the electricity used in the natural rubber manufacturing process.
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Research Article|
January 18 2016
Treatment of natural rubber processing wastewater using a combination system of a two-stage up-flow anaerobic sludge blanket and down-flow hanging sponge system
D. Tanikawa;
1Department of Civil and Environmental Engineering, National Institute of Technology, Kure College, 2-2-11 Aga-minami, Kure 731-4331, Japan
E-mail: tanikawa@kure-nct.ac.jp
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K. Syutsubo;
K. Syutsubo
2Center for Regional Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
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M. Hatamoto;
M. Hatamoto
3Department of Environmental System Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Japan
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M. Fukuda;
M. Fukuda
4Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Japan
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M. Takahashi;
M. Takahashi
5Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579, Japan
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P. K. Choeisai;
P. K. Choeisai
6Department of Environmental Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand
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T. Yamaguchi
T. Yamaguchi
3Department of Environmental System Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Japan
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Water Sci Technol (2016) 73 (8): 1777–1784.
Article history
Received:
July 01 2015
Accepted:
January 06 2016
Citation
D. Tanikawa, K. Syutsubo, M. Hatamoto, M. Fukuda, M. Takahashi, P. K. Choeisai, T. Yamaguchi; Treatment of natural rubber processing wastewater using a combination system of a two-stage up-flow anaerobic sludge blanket and down-flow hanging sponge system. Water Sci Technol 27 April 2016; 73 (8): 1777–1784. doi: https://doi.org/10.2166/wst.2016.019
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