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Effects of biochar combined with MgO desulfurization waste residue on nitrogen conversion and odor emission in chicken manure composting

文献类型： 外文期刊

作者： Pang, Yuwan 1 ; Zhen, Feng 5 ; Wang, Dehan 2 ; Luo, Zifeng 2 ; Huang, Jianfeng 1 ; Zhang, Yanli 6 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou, Peoples R China

3.Guangdong Key Lab Nutrient Cycling & Farmland Cons, Guangzhou, Peoples R China

4.Guangdong Lab Lingnan Modern Agr, Maoming Branch, Maoming, Peoples R China

5.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China

6.Mudanjiang Normal Univ, Coll Life Sci & Technol, Mudanjiang, Peoples R China

7.29 Jinying Rd, Guangzhou, Guangdong, Peoples R China

关键词： Chicken manure compost; biochar; MgO desulfurization waste residue; nitrogen conversion; deodorization

期刊名称：ENVIRONMENTAL TECHNOLOGY （ 影响因子：2.8； 五年影响因子：2.8 ）

ISSN： 0959-3330

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Aim: Chicken manure is known to produce strong odors during aerobic composting, which not only pollutes the surrounding environment but also leads to the loss of valuable nutrients like nitrogen and sulfur, thus reducing the quality of the fertilizer. Methods: In this study, we explored the use of biochar combined with MgO desulfurization waste residue (MDWR) as a novel composting additive. Our approach involved conducting composting tests, characterizing the compost samples, conducting pot experiments, and examining the impact of the additives on nitrogen retention, deodorization, and compost quality. Results: Our findings revealed that the addition of biochar and MDWR significantly reduced ammonia volatilization in chicken manure compost, demonstrating a reduction rate of up to 60.12%. Additionally, the emission of volatile organic compounds (VOCs) from chicken manure compost treated with biochar and MDWR decreased by 44.63% compared to the control group. Conclusions: The composting product treated with both biochar and MDWR (CMB) exhibited a 67.7% increase in total nitrogen (TN) compared to the blank control group, surpassing the other treatment groups and showcasing the synergistic effect of these two additives on nitrogen retention. Moreover, the CMB treatment facilitated the formation of struvite crystals. Furthermore, our pot experiment results demonstrated that the CMB treatment enhanced vegetable yield and quality while reducing nitrate content. These findings highlight the significant impact of MDWR on nitrogen retention, deodorization, and compost quality enhancement, thereby indicating its promising application prospects.

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