Preparation and mechanisms of nutrient morphological transformation of coal gangue-cattle manure-sheep manure composite eco-friendly fertilizer

WANG Kaiyue; YANG Zhijie; LIU Wuyan; LIU Jianguo; LI Yu; ZHANG Shuai

doi:10.13205/j.hjgc.202510008

Volume 43 Issue 10

Oct. 2025

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WANG Kaiyue, YANG Zhijie, LIU Wuyan, LIU Jianguo, LI Yu, ZHANG Shuai. Preparation and mechanisms of nutrient morphological transformation of coal gangue-cattle manure-sheep manure composite eco-friendly fertilizer[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 65-75. doi: 10.13205/j.hjgc.202510008

Citation:

WANG Kaiyue, YANG Zhijie, LIU Wuyan, LIU Jianguo, LI Yu, ZHANG Shuai. Preparation and mechanisms of nutrient morphological transformation of coal gangue-cattle manure-sheep manure composite eco-friendly fertilizer[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 65-75. doi: 10.13205/j.hjgc.202510008

Citation:

WANG Kaiyue, YANG Zhijie, LIU Wuyan, LIU Jianguo, LI Yu, ZHANG Shuai. Preparation and mechanisms of nutrient morphological transformation of coal gangue-cattle manure-sheep manure composite eco-friendly fertilizer[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 65-75. doi: 10.13205/j.hjgc.202510008

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Preparation and mechanisms of nutrient morphological transformation of coal gangue-cattle manure-sheep manure composite eco-friendly fertilizer

doi: 10.13205/j.hjgc.202510008

WANG Kaiyue¹,
YANG Zhijie^{1,2,3
,
,},
LIU Wuyan⁴,
LIU Jianguo^1,2,3,
LI Yu⁵,
ZHANG Shuai¹

1. School of Resources and Environmental Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. Key Laboratory of Environmental Pollution Control and Remediation of Higher Education Institutions in Inner Mongolia Autonomous Region, Hohhot 010051, China;
3. Key Laboratory of Geological Hazards and Geotechnical Engineering Defense in Sandy and Drought Regions at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China;
4. Ordos Yundong Ecological Industry Development Co., Ltd., Ordos 017000, China;
5. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100080, China

Received Date: 2025-03-07
Accepted Date: 2025-04-30
Rev Recd Date: 2025-04-01

Available Online: 2025-12-03

Publish Date: 2025-10-01

Abstract

Abstract

To investigate the changes in maturity and nutrient transformation mechanism of coal gangue， cow manure， and sheep manure synergistic composting， and to maximize the utilization efficiency of coal gangue， this study set up four sets of mixed composting treatments with coal gangue content of 60% （D1）， 50% （D2）， 40% （D3）， 30% （D4）. During the composting process， changes in the temperature， pH， conductivity， nitrogen， phosphorus， potassium， humus， C/N， seed germination index， as well as characterization methods such as scanning electron microscopy （SEM）， X-ray diffraction （XRD）， Fourier transform infrared spectroscopy （FTIR）， etc.， were involved， to reveal their patterns and effects. The results showed that the addition of coal gangue can effectively reduce the salt content of ecological fertilizers. The conductivity of the final products of D1， D2， D3， and D4 were 1.02， 1.12， 1.20， and 1.35 mS/cm， respectively. The pH values of the four treatments were within the range of 7.5 to 8.1， which met the requirements of China’s national organic fertilizer standard. The effective phosphorus and potassium of groups D3 and D4 were increased by more than 60% and 50%， respectively. When the content of coal gangue was 40% （D3 group）， the F/A ratio reached 2.5， indicating the strongest degree of composting humification. The germination index （GI） was as high as 104.2%， and it could meet the GI index requirement earlier， indicating that the toxicity to plants was effectively reduced. The SEM-XRD-FTIR results also showed that after composting， the honeycomb structure in the D3 pile became more pronounced， and some crystals had decreased crystallinity. The aromatization degree of the pile was higher， showing better slow-release performance. In summary， the synergistic composting of coal gangue， cow manure， and sheep manure in a mass ratio of 4：3：3 can significantly improve the maturity and nutrient conversion efficiency of compost. This study provides a theoretical basis and application value for preparation technology of high value-added ecological fertilizers.
- coal gangue,
- aerobic composting,
- nutrient elements,
- maturity,
- mechanism of morphological transformation

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References(39)

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