Evolution from basic to advanced structure of fulvic acid and humic acid prepared by food waste

Mu, Daichen; Mu, Linying; Geng, Xinyu; Mohamed, Taha Ahmed; Wei, Zimin

doi:10.1016/j.ijbiomac.2023.128413

Cited by 16 publications

(2 citation statements)

References 48 publications

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“…As for intermittent aeration, O 2 consumption increased after day 4 in the thermophilic stage of composting and the lowest value of O 2 content was 16.3% in K10T10 (V600). The O 2 content of all treatments was greater than 16%, suggesting a sufficient oxygen supply for composting microbial metabolic activity ( Mu et al, 2024 ).…”

Section: Resultsmentioning

confidence: 99%

Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw

Wang,

Xu,

Wang

et al. 2024

Front. Microbiol.

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Aeration is an important factor to regulate composting efficiency and nitrogen loss. This study is aimed to compare the effects of different aeration modes (continuous and intermittent) and aeration rate on nitrogen conversion and bacterial community in composting from dehydrated sludge and corn straw. Results showed that the intermittent aeration mode at same aeration volume was superior to the continuous aeration mode in terms of NH3 emission reduction, nitrogen conversion and germination index (GI) improvement. Intermittent aeration mode with 1200 L/h (aeration 5 min, stop 15 min) [K5T15 (V1200)] and 300 L/h of continuous aeration helped to the conservation of nitrogen fractions and accelerate the composting process. However, it was most advantageous to use 150 L/h of continuous aeration to reduce NH3 emission and ensure the effective composting process. The aeration mode K5T15 (V1200) showed the fastest temperature rise, the longer duration of thermophilic stage and the highest GI (95%) in composting. The cumulative NH3 emission of intermittent aeration mode was higher than continuous aeration mode. The cumulative NH3 emission of V300 was 23.1% lower than that of K5T15 (V1200). The dominant phyla in dehydrated sludge and corn straw composting were Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes. The dominant phylum in the thermophilic stage was Firmicutes (49.39%~63.13%), and the dominant genus was Thermobifida (18.62%~30.16%). The relative abundance of Firmicutes was greater in the intermittent aeration mode (63.13%) than that in the continuous aeration mode (57.62%), and Pseudomonas was dominant in composting with lower aeration rate and the lowest NH3 emission. This study suggested that adjustment to the aeration mode and rate could affect core bacteria to reduce the nitrogen loss and accelerate composting process.

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Section: Resultsmentioning

confidence: 99%

Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw

Wang,

Xu,

Wang

et al. 2024

Front. Microbiol.

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“…Here, humus forms during humification, wherein dead remains transform, lose their original features, and acquire novel, distinct properties [29,31]. Humic substances within humus perform critical functions in soil formation and its physical, nutritional, chemical, biological, and environmental aspects [32][33][34]. Greenland et al [35] emphasised that optimal conditions for plant growth arise in soils with organic substance contents exceeding 2%, which are well humified and mature, with high contents of condensed aromatic compounds.…”

Section: Introductionmentioning

confidence: 99%

Addition of Biochar and Fertiliser Drives Changes in Soil Organic Matter and Humic Substance Content in Haplic Luvisol

Šimanský,

Horák,

Lukac

2024

Land

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Humic substances (HSs) constitute a primary component of soil organic matter (SOM) and play a crucial role in soil formation and fertility. However, comprehensive information regarding quantitative and qualitative changes in HS following biochar’s application to soil still needs to be improved. This study reports on the impact of biochar application at rates of 0, 10, and 20 t ha−1 (B0, B10, B20), both with and without nitrogen fertilisation at varying levels (N0, N1, N2), on SOM and HS contents throughout the cropping seasons between 2014 and 2019. The findings reveal changes in SOM and HS contents due to biochar addition and fertilisation. Notably, the most substantial increase in soil organic carbon content was observed in the B20N1 and B10N1 treatments, in stark contrast with the reference B0N0 treatment. A decrease in humification of SOM was noted across all treatments involving biochar, whether alone or combined with different N fertilisation levels. An interesting positive change in HS contents was observed in B10N2, where an increase in humic acids and a decrease in fulvic acids enhanced HS stability and improved HS quality. These findings shed light on the intricate dynamics of SOM and HSs in response to biochar application and nitrogen fertilisation over multiple vegetation seasons of crops on loamy Haplic Luvisols in Central Europe.

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The biotic effects of lignite on humic acid components conversion during chicken manure composting

Wang,

Han,

Liu

et al. 2024

Bioresource Technology

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Evolution from basic to advanced structure of fulvic acid and humic acid prepared by food waste

Cited by 16 publications

References 48 publications

Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw

Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw

Addition of Biochar and Fertiliser Drives Changes in Soil Organic Matter and Humic Substance Content in Haplic Luvisol

The biotic effects of lignite on humic acid components conversion during chicken manure composting

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