| CHINESE MATERIALS CONFERENCE — ENVIRONMENTAL ENGNEERING MATERIALS |
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| Effect of Iron Modified Biochar on Anaerobic Digestion Enhancement of Brewery Wastewater |
| YE Junpei1,2, ZHANG Panyue2, XIAN Guang3, ZHANG Guangming3
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1 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083 ;
2 College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083;
3 School of Environment and Resource, Renmin University of China, Beijing 100872; |
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Abstract A large amount of high COD wastewater produced with the beer production process must be effectively treated to meet standard requirements before discharge or recycle. The wastewater treatment is of great concern before discharge into the nature environment. In this study, the iron-modified biochar (Fe/C) and unmodified biochar (BC) was prepared with poplar wood chips under pyrolysis temperature of 550 ℃. The Fe/C and BC were applied to investigate the improvement of anaerobic digestion of brewery wastewater. The results showed that BC and Fe/C could shorten the methanogenic hysteresis period by 33%. The methanogenic logarithmic periods of BC and Fe/C were 40 h and 14 h respectively. Although the logarithmic phase of biogas production for BC was longer than Fe/C, the methanogenic rate of Fe/C in logarithmic phase was higher than BC, thus the final gas production of Fe/C was higher than that of BC. Compared with the control group, the cumulative biogas production of Fe/C and BC was increased by 81.36% and 70.28%, respectively. Fourier transform infrared spectroscopy (FT-IR) spectra showed that the obviously shift of aliphatic hydrocarbon functional groups in BC and Fe/C during anaerobic digestion, and the microorganisms was adsorbed on the biochar. The dissolution of ash in BC during the anaerobic digestion might be the reason for the improvement of gas production. Moreover, the iron oxides existed in the Fe/C also promoted the anaerobic digestion.
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Published: 22 November 2018
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2018, Vol. 32 
