ANAEROBIC FERMENTATION SLURRY RECYCLED FOR DEGRADATION OF HEAVY METAL-CONTAINING RICE STRAW

XU Wen-xuan; GUO Zhao-hui; XIAO Xi-yuan; PENG Chi; XIN Li-qing; TAO Ming-ming; HAN Liang-liang

doi:10.13205/j.hjgc.202101019

Volume 39 Issue 1

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(1): 123-129

XU Wen-xuan, GUO Zhao-hui, XIAO Xi-yuan, PENG Chi, XIN Li-qing, TAO Ming-ming, HAN Liang-liang. ANAEROBIC FERMENTATION SLURRY RECYCLED FOR DEGRADATION OF HEAVY METAL-CONTAINING RICE STRAW[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 123-129. doi: 10.13205/j.hjgc.202101019

Citation:

XU Wen-xuan, GUO Zhao-hui, XIAO Xi-yuan, PENG Chi, XIN Li-qing, TAO Ming-ming, HAN Liang-liang. ANAEROBIC FERMENTATION SLURRY RECYCLED FOR DEGRADATION OF HEAVY METAL-CONTAINING RICE STRAW[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 123-129. doi: 10.13205/j.hjgc.202101019

Citation:

XU Wen-xuan, GUO Zhao-hui, XIAO Xi-yuan, PENG Chi, XIN Li-qing, TAO Ming-ming, HAN Liang-liang. ANAEROBIC FERMENTATION SLURRY RECYCLED FOR DEGRADATION OF HEAVY METAL-CONTAINING RICE STRAW[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 123-129. doi: 10.13205/j.hjgc.202101019

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ANAEROBIC FERMENTATION SLURRY RECYCLED FOR DEGRADATION OF HEAVY METAL-CONTAINING RICE STRAW

doi: 10.13205/j.hjgc.202101019

School of Metallurgy and Environment, Central South University, Changsha 410083, China

Received Date: 2020-01-19
Available Online: 2021-04-23

Abstract

Abstract

In this study, the disposal possibility of anaerobic fermentation slurry produced in the process of anaerobic fermentation for heavy metal-containing rice straw was studied. The results showed that the circulation reflux of anaerobic fermentation slurry could accelerate the degradation of rice straw, including cellulose and hemicellulose. Meanwhile, the heavy metals released from rice straw in the anaerobic fermentation process was similar to that with original anaerobic fermentation slurry. The methane yields of 121.2, 282.6 mL/g VS was achieved under the solid to liquid ratio of 3.3%. Furthermore, the release percentages of Cu, Cd, Pb and Zn from rice straw arrived to 94.22%, 54.21%, 72.67% and 98.55%, respectively. The content of heavy metals in straw residues was significantly lower than the levels for the Urban Garbage Agricultural Control Standard in China (GB 8172-87) and could be backed to the field. After fermentation, the concentration of Cu, Cd, Pb and Zn in anaerobic fermentation slurry were 0.30, 0.073, 0.10, 2.57 mg/L respectively. The results showed that the anaerobic fermentation slurry recycled was available for the anaerobic fermentation of heavy metals-containing rice straw and beneficial to the release of heavy metals from rice straw.
- rice straw,
- anaerobic fermentation,
- anaerobic fermentation slurry,
- circulation reflux,
- heavy metals

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References(35)

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