| 叶俊沛,张盼月,仙光,张光明.铁改性生物炭对啤酒废水厌氧消化产甲烷的促进作用研究[J].材料导报,2018,32(20):3634-3637, 3653 |
| 铁改性生物炭对啤酒废水厌氧消化产甲烷的促进作用研究 |
| Effect of Iron Modified Biochar on Anaerobic Digestion Enhancement of Brewery Wastewater |
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| DOI：10.11896/j.issn.1005-023X.2018.20.025 |
| 中文关键词: 铁改性生物炭 啤酒废水 厌氧消化 |
| 英文关键词: iron modified biochar, brewery wastewater, anaerobic digestion |
| 基金项目:国家重点研发专项(2017YFC0504405)；煤炭资源与安全开采国家重点实验室2017年开放基金课题(SKLCRSM17KFA02) |
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| 中文摘要: |
| 啤酒生产过程中产生的大量高COD废水必需经过有效处理,达到标准后才能排放或二次循环利用。本研究以固体废弃物杨木木屑作为原料,经过载铁改性后,在550 ℃条件下热解,制备了铁改性生物炭(Fe/C)和未改性生物炭(BC),研究了它们对啤酒废水厌氧消化产甲烷的影响。实验结果表明,BC和Fe/C能够明显将产甲烷迟滞期缩短33%。BC和Fe/C的产甲烷对数期分别为40 h和14 h,虽然BC产气对数期比Fe/C长,但Fe/C在对数期的产甲烷速率明显高于BC,因此Fe/C的甲烷产量明显高于BC的甲烷产量。经过48 h厌氧消化后,对比空白组,Fe/C和BC的最大产气量分别提高了81.36%和70.28%,说明Fe/C和BC能够明显促进啤酒废水产甲烷。傅里叶红外转换光谱(FT-IR)表明,BC和Fe/C中脂肪烃官能团在厌氧消化前后发生明显偏移,同时生物炭对微生物具有吸附作用。XRD谱中,厌氧消化前后BC中无机相对应的峰位减弱,说明厌氧消化过程中生物炭中灰分溶出,这可能是BC对厌氧消化过程有促进作用的原因。Fe/C中铁氧化物等无机组分的存在,促进了厌氧消化过程。 |
| 英文摘要: |
| 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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