Effectiveness of biochar-enhanced biofilter on removal of NH<sub>3</sub> from compost tail gas and changes of microbial community in its filler

GUO Wenxiu; CHENG Hongsheng; SHEN Yujun; DING Jingtao; ZHANG Yun; WANG Liming; ZHOU Haibin; WU Jiang; ZHANG Ying

doi:10.13205/j.hjgc.202511010

Volume 43 Issue 11

Nov. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(11): 84-92

GUO Wenxiu, CHENG Hongsheng, SHEN Yujun, DING Jingtao, ZHANG Yun, WANG Liming, ZHOU Haibin, WU Jiang, ZHANG Ying. Effectiveness of biochar-enhanced biofilter on removal of NH3 from compost tail gas and changes of microbial community in its filler[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 84-92. doi: 10.13205/j.hjgc.202511010

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GUO Wenxiu, CHENG Hongsheng, SHEN Yujun, DING Jingtao, ZHANG Yun, WANG Liming, ZHOU Haibin, WU Jiang, ZHANG Ying. Effectiveness of biochar-enhanced biofilter on removal of NH₃ from compost tail gas and changes of microbial community in its filler[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 84-92. doi: 10.13205/j.hjgc.202511010

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Effectiveness of biochar-enhanced biofilter on removal of NH₃ from compost tail gas and changes of microbial community in its filler

doi: 10.13205/j.hjgc.202511010

GUO Wenxiu^1,2,
CHENG Hongsheng^2,3,
SHEN Yujun^2,3,
DING Jingtao^2,3,
ZHANG Yun^2,3,
WANG Liming^{1
,
,},
ZHOU Haibin^2,3,
WU Jiang^1,2,
ZHANG Ying^2,3

1. College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
2. Institute of Energy and Environmental Protection, Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China;
3. Key Laboratory of Resource Recycling Technology and Model, Ministry of Agriculture and Rural Affairs, Beijing 100125, China

Received Date: 2024-03-04
Accepted Date: 2024-04-30
Rev Recd Date: 2024-04-10

Available Online: 2026-01-09

Abstract

Abstract

At present， odor pollution has become a key problem restricting the industrialization of compost. Odor gas biological deodorization technology is widely used by most scholars for its advantages of high efficiency， no secondary pollution， good ecological safety， simple equipment， easy operation， relatively low cost， convenient maintenance and management. To study the enhancement effect of biochar on biofilter and the change of microbial community in its filler， this paper took NH₃ in compost tail gas as the target pollutant， and bamboo biochar enhanced biofilter as the research object， and carried out the experiments on NH₃ removing effect in biofilters with different additions of biochar （0%， 10%， 20% by volume ratio， respectively）， and with different heights （20， 40 cm）. The changes of NH⁺₄-N， NO^-₃-N， and microbial communities in the filler were analyzed in depth. The results showed that the average removal efficiency of NH₃ in biofilters with different treatments was higher than 92%. The best removal effect， 99.17%， was achieved in the biofilter when the biochar content was 20% and the packing height was 40 cm； NH⁺₄-N was more converted to NO^-₃-N， NO^-₂-N or other compounds when the biochar content was 20% and the packing height was 20 cm and 40 cm， among which NO^-₂-N content reached the highest level on the 24th day， which was respectively 0.37 g/kg， 0.31 g/kg. Biome analysis showed that microbial diversity was highest in the treatment with 20% biochar addition. The microbial diversity index was 4.42 and 4.34 at 20 cm and 40 cm heights， respectively； Brumimicrobium， norank-f-MWH-CFBk5， and norank-f-Fodinicurvataceae were the dominant fungi after the passage of NH₃ genera. Therefore， the use of biochar-enhanced biofilter for NH₃ treatment has a good application prospect.
- biochar,
- biological filter,
- NH₃,
- microorganisms

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References(41)

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