Eisenia fetida for vermiconversion of waste biomass of medicinal herbs: Status of nutrients and stability parameters

Das, Dhritashri; Kalita, Nilotpal; Langthasa, Dericka; Faihriem, Vanlalhriet; Borah, Glory; Chakravarty, Paramita; Deka, Hemen

doi:10.1016/j.biortech.2021.126391

Cited by 16 publications

(4 citation statements)

References 42 publications

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“…This can be attributed to the consumption of hydrogen ions by various hydroxyl groups and phenols during the mineralization and purification of soil organic carbon, along with a decrease in volatile acids during vermicomposting 14,15 . pH reduction can also be related to nitrogen and phosphorus mineralization and microbial decomposition activities 16 . In this regard, our study's results align with Molavi et al and A' Ali et al 17,18 .…”

Section: Changes In Physicochemical and Microbial Properties During V...mentioning

confidence: 99%

“…Factors affecting the increase of TCN levels during decomposition by microorganisms include the reduction of organic matter, the conversion of carbon from organic matter to CO 2 , and the decrease of humidity due to evaporation during mineralization 33 . Furthermore, the nitrogen content in earthworm mucus, body fluids, enzymes, and the decayed tissues of earthworms, as well as the carbon-rich mucus and excrement products of earthworms, can create an environment conducive to increased nitrogen content in the soil 16 . The results from the conducted studies reveal that the nitrification rate may be enhanced during the maturation stage of vermicompost due to low concentrations of antibiotics, but high concentrations of antibiotics can inhibit this process.…”

Section: Carbon-to-nitrogen (C/n) Ratio and Total Kjeldahl Nitrogen (...mentioning

confidence: 99%

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Bioconversion of cow manure through vermicomposting: effects of tylosin concentration on the weight of worms and manure quality

Ghandehari Yazdi,

Mokhtari,

Nabi Meibodi

et al. 2024

Sci Rep

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This study investigated batch-fed vermicomposting of cow manure, with a specific focus on assessing the effects of tylosin on the weight of earthworms and the overall quality of the resulting manure. Five reactors, including three concentrations of tylosin (50, 100, and 150 mg/kg) and two control reactors, were employed. Residual tylosin concentrations were measured using high-performance liquid chromatography (HPLC). Quality parameters such as pH, temperature, volatile solids (VS), organic carbon content (OCC), electrical conductivity (EC), ash content, C/N ratio, total Kjeldahl nitrogen (TKN), and microbial content were evaluated. The toxicity and maturity of vermicompost were assessed by determining the germination index (GI). The study also monitored variations in the earthworm’s weight. The results demonstrated a decreasing trend in VS, OCC, C/N, and fecal coliforms, along with increased pH, EC, ash content, and TKN during the vermicomposting process. Furthermore, investigations revealed significant reductions in the reactors with tylosin concentrations of 50, 100, and 150 mg/kg, resulting in the removal of 98%, 90.48%, and 89.38% of the initial tylosin, respectively. This result confirms the faster removal of tylosin in reactors with lower concentrations. Degradation of tylosin also conforms to first-order kinetics. The findings showed a significant influence of tylosin on the weight of Eisenia fetida earthworms and the lowest antibiotic concentration led to the highest weight gain. Finally, the high percentage of germination index (90–100%) showed that the quality and maturity of vermicompost is by national and international standards.

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Section: Changes In Physicochemical and Microbial Properties During V...mentioning

confidence: 99%

Section: Carbon-to-nitrogen (C/n) Ratio and Total Kjeldahl Nitrogen (...mentioning

confidence: 99%

Bioconversion of cow manure through vermicomposting: effects of tylosin concentration on the weight of worms and manure quality

Ghandehari Yazdi,

Mokhtari,

Nabi Meibodi

et al. 2024

Sci Rep

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“…[31] Parameters such as moisture content, C/N ratio, material particle size, and others must be optimized to improve composting efficacy and product quality. [5,34,35] Moreover, additives are commonly used to improve the composting process by decreasing leaching, lowering greenhouse gas emissions, and increasing microbial activity. As additions, TCMR, biochar, and vermiculite are often used.…”

Section: Aerobic Compostingmentioning

confidence: 99%

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Long

Guo

et al. 2023

ChemistrySelect

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Chinese medicine is widely employed in illness prevention and treatment. In recent years, the increased demand for Chinese medicine resources has resulted in a large quantity of waste created during industrialization. However, traditional methods for treating herbal residues, including burning, stacking, and burying, can cause significant environmental damage and resource waste. Furthermore, these application approaches have a low level of resource utilization and a low degree of utilization. Therefore, developing a classification management system is a necessary precondition for reusing Chinese herb residues for medicinal, feed, fertilizer, and energy resource reuse. This paper reviews the potential applications of Chinese herb residues in the extraction of active resources, composting, feed addition, bioethanol preparation, and pyrolysis to biochar, bio‐oil, and fuel gas. Overall, this work provides a foundation for further investigation into the high‐value usage model and resource reuse pathway of Chinese herb residues.

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“…They contribute to litter decomposition by directly fragmenting litter and indirectly influencing soil properties, and the structure and activities of microorganisms and other fauna (Kizilkaya et al, 2011 ; Sackett et al, 2013 ; Schulmann & Tiunov, 1999 ). Eisenia fetida was found abundant in compost heaps where it accelerates organic matter decomposition by stimulating microbial activities and affecting soil pH (Aira et al, 2006 ; Das et al, 2022 ). However, E. fetida also lives in forests in southern Europe and eastern China, in particular close to urban areas (Huang et al, 2003 ).…”

Section: Introductionmentioning

confidence: 99%

Earthworms increase forest litter mass loss irrespective of deposited compounds – A field manipulation experiment in subtropical forests

Yang

Tian

et al. 2023

Ecology and Evolution

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Earthworms modulate carbon and nitrogen cycling in terrestrial ecosystems, but their effect may be compromised by the deposition of pollutants from industrial emissions. However, studies investigating how deposited compounds affect the role of earthworms in carbon cycling such as litter decomposition are lacking, although the interactions of earthworms and deposited compounds are important for understanding the impact of pollutants on ecosystems and the potential of earthworms in bioremediation. We performed a 365‐day in situ litterbag decomposition experiment in a deciduous ( Quercus variabilis ) and coniferous ( Pinus massoniana ) forest in southeast China. We manipulated nitrogen (N), sodium (Na), and polycyclic aromatic hydrocarbons (PAHs) as model compounds during litter decomposition with and without earthworms ( Eisenia fetida ). After one year, N, Na, and PAH all slowed down litter mass loss, with the effects of Na being the strongest. By contrast, E. fetida generally increased litter mass loss, and the positive effects were uniformly maintained irrespective of the type of compounds added. However, the pathways to how earthworms increased litter mass loss varied among the compounds added and the two forests studied. As indicated by structural equation modeling, earthworms mitigated the negative effects of deposited compounds by directly increasing litter mass loss and indirectly increasing soil pH and microbial biomass. Overall, the results indicate that the acceleration of litter mass loss by earthworms is little affected by deposited compounds, and that earthworms have the potential to mitigate negative impacts of pollutants on litter decomposition and ecosystem processes.

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Eisenia fetida for vermiconversion of waste biomass of medicinal herbs: Status of nutrients and stability parameters

Cited by 16 publications

References 42 publications

Bioconversion of cow manure through vermicomposting: effects of tylosin concentration on the weight of worms and manure quality

Bioconversion of cow manure through vermicomposting: effects of tylosin concentration on the weight of worms and manure quality

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Earthworms increase forest litter mass loss irrespective of deposited compounds – A field manipulation experiment in subtropical forests

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