Unveiling the intrinsic relationship between ammonia and hydrogen sulfide generation during composting

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-05-27 DOI:10.1016/j.eti.2025.104298

Yue Sun, Zihan Xu, Nan Zhang, Dongdong Hu, Yao Liang, Chang Liu, Yinxi Zhu, Xiaomeng Chen

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引用次数: 0

Abstract

Microbial nitrogen and sulfur metabolism release foul gases (NH₃ and H₂S) during manure composting, which causes environmental pollution and element loss. The synergistic reduction of NH₃ and H₂S emissions is of great significance. However, it is yet unclear whether NH₃ and H₂S generation are relevant and co-regulable during composting. Therefore, this study supplemented available nitrate (N) and nitrate + cysteine lyase inhibitor (NI) to explore their effects on foul gases emission. Compared to CK composting, H₂S cumulative release reduced by 55.05 % and 62.27 % during N and NI composting, respectively, and NH₃ cumulative release reduced by 61.86 % and 59.55 %. Additionally, the fitted curves results suggested that nitrate supplementation enhanced the correlations between microbial nitrate reduction, sulfate reduction and oxidation. Therefore, this study revealed that there was an intrinsic relationship between NH₃ and H₂S generation during composting, and the regulation of microbial structure and metabolism contributed to the co-reduction of foul gases.

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揭示堆肥过程中氨与硫化氢生成的内在关系

粪肥堆肥过程中微生物的氮、硫代谢释放出恶臭气体（NH3和H2S），造成环境污染和元素损失。协同减少NH3和H2S的排放具有重要意义。然而，在堆肥过程中，NH3和H2S的生成是否相关并可共同调节尚不清楚。因此，本研究通过补充速效硝酸盐(N)和硝酸盐+ 半胱氨酸裂解酶抑制剂（NI），探讨其对恶臭气体排放的影响。与CK相比，N和NI堆肥过程中H2S累积释放量分别减少55.05 %和62.27 %，NH3累积释放量分别减少61.86 %和59.55 %。此外，拟合曲线结果表明，添加硝酸盐增强了微生物硝酸盐还原、硫酸盐还原和氧化之间的相关性。因此，本研究揭示了堆肥过程中NH3和H2S的生成之间存在内在的关系，微生物结构和代谢的调节有助于恶臭气体的共还原。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.