Resource utilization of mink manure: Functional microbial inoculation to elevate the bioavailability of organic nitrogen during composting

Zhang, Yunxian; Wei, Zimin; Guo, Jia; Zhang, Shubo; Zhao, Li; Pan, Chaonan; Wang, Liqin; Zhang, Ruju; Chen, Yufeng

doi:10.1016/j.biortech.2022.127149

Cited by 14 publications

(2 citation statements)

References 16 publications

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“…5 ). Yunxian Zhang et al found that the inoculation of functional microbial agents could significantly increase the content of organic nitrogen, while decease the mineralization rate of nitrogen [ 43 ]. The ammonium nitrogen content at high temperature can affect the ammonia emission, thereby facilitating nitrogen fixation [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Effects of adding corn steep liquor on bacterial community composition and carbon and nitrogen transformation during spent mushroom substrate composting

et al. 2023

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Background Carbon and nitrogen are essential energy and nutrient substances in the composting process. Corn steep liquor (CSL) is rich in soluble carbon and nitrogen nutrients and active substances and is widely used in the biological industry. Nonetheless, limited research has been done on the effect of CSL on composting. This work firstly reveals the effect of adding CSL to bacterial community composition and carbon and nitrogen conversion during composting. This study provides the choice of auxiliary materials for the spent mushroom substrate compost (SMS) and some novel knowledge about the effect of bacterial community on C and N cycling during composting of SMS and CSL. Two treatments were set up in the experiment: 100% spent mushroom substrate (SMS) as CK and SMS + 0.5% CSL (v/v) as CP. Results The results showed that the addition of CSL enhanced the initial carbon and nitrogen content of the compost, altered the bacterial community structure, and increased the bacterial diversity and relative abundance, which might be beneficial to the conversion and retention of carbon and nitrogen in the composting process. In this paper, network analysis was used to screen the core bacteria involved in carbon and nitrogen conversion. In the CP network, the core bacteria were divided into two categories, synthesizing and degrading bacteria, and there were more synthesizing bacteria than degrading bacteria, so the degradation and synthesis of organic matter were carried out simultaneously, while only degrading bacteria were found in the CK network. Functional prediction by Faprotax identified 53 groups of functional bacteria, among which 20 (76.68% abundance) and 14 (13.15% abundance) groups of functional bacteria were related to carbon and nitrogen conversion, respectively. Adding CSL stimulated the compensatory effect of core and functional bacteria, enhanced the carbon and nitrogen transformation ability, stimulated the activity of low-abundance bacteria, and reduced the competitive relationship between the bacterial groups. This may be why the addition of CSL accelerated the organic matter degradation and increased carbon and nitrogen preservation. Conclusions These findings indicate that the addition of CSL promoted the cycling and preservation of carbon and nitrogen in the SMS composts, and the addition of CSL to the compost may be an effective way to dispose of agricultural waste.

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Section: Resultsmentioning

confidence: 99%

Effects of adding corn steep liquor on bacterial community composition and carbon and nitrogen transformation during spent mushroom substrate composting

et al. 2023

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“…At the end of composting, the ammonium N content in all treatments ranged from 150 to 210 mg/kg, reaching the decomposition standard. The ammonium N content of the organic matter is gradually converted to nitrate N as the composting process progresses (Zhang et al, 2022). The microorganisms involved in the nitrogen cycle are multifunctional communities that are the primary in uencers of N conversion and play a role in the composting process by producing enzymes involved in the various methods of nitrogen conversion.…”

Section: Physicochemical Properties Changes During Compostingmentioning

confidence: 99%

Effects of biochar on enzyme activities during composting of cattle manure

Zhang

et al. 2023

Preprint

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With the rapid growth of livestock, they produce more and more waste, causing severe environmental damage. Biochar as a composting additive has several advantages, including improved performance and humification processes, increased enzyme activity, and reduced nitrogen (N) losses. To investigate the effect of biochar addition on compost quality and enzyme activity, we composted cattle manure with different biochar measures (2%, 5%, and 10%) and different types (rice husk and rice straw) of biochar. The results showed that adding biochar to the aerobic compost of cow manure effectively accelerated the temperature rise of the compost, decreased the total carbon (C) content of the compost, and the total N content increased from the mesophilic phase to the decaying period. The C-to-N compost showed a decreasing trend. The 5% rice husk biochar and 2% rice straw biochar treatments more effectively reduced the N loss during composting and played a better role in N fixation. The addition of rice husk biochar more effectively increased the urease activities compared with the addition of rice straw biochar. Adding 5% rice husk biochar increased the peroxidase and polyphenol oxidase activities by 78% and 38%, respectively. Therefore, adding 5% rice husk biochar effectively improved compost quality and enzyme activities and reduced N loss in the aerobic composting process of cattle manure for optimal compost production.

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Identifying the fate of Cd passivation during the long-term composting of rice straw: role of humic substances

Chen,

et al. 2023

J Soils Sediments

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Resource utilization of mink manure: Functional microbial inoculation to elevate the bioavailability of organic nitrogen during composting

Cited by 14 publications

References 16 publications

Effects of adding corn steep liquor on bacterial community composition and carbon and nitrogen transformation during spent mushroom substrate composting

Effects of adding corn steep liquor on bacterial community composition and carbon and nitrogen transformation during spent mushroom substrate composting

Effects of biochar on enzyme activities during composting of cattle manure

Identifying the fate of Cd passivation during the long-term composting of rice straw: role of humic substances

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