Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Heidarzadeh, Mohammad Hossein; Amani, Hossein; Javadian, Behzad

doi:10.1007/s40201-019-00348-z

Cited by 26 publications

(8 citation statements)

References 21 publications

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“…Setup for the investigation consisted of three lab scale aerated bioreactors (A-inoculated with the Aspergillus niger, B-inoculated with old compost and Ccontrol). Results showed a decreased C/N (63.37%, 59.6% and 46%) for bioreactors B, A and control, respectively with a maximum temperature (59 C) in reactor B (Heidarzadeh et al, 2019). Furthermore, a reduction in process time (18 days) concluded that microbe aided composting is an economic viable technique.…”

Section: Microbial Additivesmentioning

confidence: 95%

Microbes as vital additives for solid waste composting

Rastogi

Nandal

Khosla

2020

Heliyon

187

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Composting is a natural process that stems through microbial succession, marking the degradation and stabilization of organic matter present in waste. The use of microbial additives during composting is considered highly efficient, likely to enhance the production of different enzymes resulting in better rate of waste degradation. In lesser developed countries, composting has emerged as a vital technology to recycle the biodegradable waste while generating a useful product. Depending on the composition of the waste material, it can either directly undergo composting or homogenized prior to secondary waste treatment methods such as landfilling. However, a relatively expensive downstream handling all along is a main hurdle towards economics of the process. Although basic methodology and recent approaches are known in crucial aspects of the process through various reviews, exploring the behavior of effective microbial additives will be resourceful. In this review, to fill in the gap, studies related to microbial composting of municipal solid and food waste were acknowledged. Here in, factors that could slow down the composting process and affect the compost quality were addressed. Lastly, the review pictured a positive simulation and stated how excellent results, can be achieved by microbial additives during composting.

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Section: Microbial Additivesmentioning

confidence: 95%

Microbes as vital additives for solid waste composting

Rastogi

Nandal

Khosla

2020

Heliyon

187

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“…The significant and beneficial influence of A. niger in humification processes was also demonstrated in research concerning the formation of the humic bioactive compound “shilajit” [ 66 ]. Studies on composting have also shown that inoculation with A. niger reduces process time to 18 days, which was a more beneficial variant than other results [ 67 ]. Considering the results of our experiments, however, we believe that processes taking place in the soil do not have the same dynamics as compost processes.…”

Section: Resultsmentioning

confidence: 99%

Chemical Transformation of Humic Acid Molecules under the Influence of Mineral, Fungal and Bacterial Fertilization in the Context of the Agricultural Use of Degraded Soils

et al. 2021

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The main goal of this work was to study the structural transformation of humic acids (HAs) under the influence of selected strains of fungi (Aspergillus niger and Paecilomyces lilacinus) and bacteria (Bacillus sp., Paenibacillus polymyxa and Bacillus amyloliquefaciens) with/without the presence of NPK fertilizers. Two-year experiments were conducted on two different soils and HAs isolated from these soils were examined for structure, humification degree, and quantity using fluorescence and UV-Vis spectroscopy, elemental analysis, and extraction methods. Results showed that the applied additives contributed to the beneficial transformation of HAs, but effects differed for various soils. HAs from silty soil with higher organic carbon content showed simplification of their structure, and decreases in humification, molecular weight, and aromaticity under the influence of fungi and bacteria without NPK, and with NPK alone. With both fungi and NPK, increases in O/H and O/C atomic ratios indicated an increase in the number of O-containing functional groups. HAs from sandy soil did not show as many significant changes as did those from silty soil. Sandy soil exhibited a strong decline in HA content in the second year that was reduced/neutralized by the presence of fungi, bacteria, and NPK. Periodically observed fluorescence at ~300 nm/450 nm reflected formation of low-molecular HAs originating from the activity of microorganisms.

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“…The germination index revealed the maturity of compost via the effect of the compost extract on the growth of plant seeds [ 29 ]. Figure 1 E showed that the GI value declined in B1 treatment on day 1; however, in both B2 and B3 treatments, the GI values began to decrease on day 8.…”

Section: Resultsmentioning

confidence: 99%

“…Incubation of T. viride has a role in improving the humification and compost quality [ 32 ]. A. niger has profound effects on enriching the compost quality and shortening the composting period [ 29 ]. Nakasaki et al (2017) found that compost with added yeast played a pivotal role in degrading the organic matter [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Microbial Inoculation on Carbon Preservation during Goat Manure Aerobic Composting

Wang

Gao

et al. 2021

Molecules

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Carbon is the crucial source of energy during aerobic composting. There are few studies that explore carbon preservation by inoculation with microbial agents during goat manure composting. Hence, this study inoculated three proportions of microbial agents to investigate the preservation of carbon during goat manure composting. The microbial inoculums were composed of Bacillus subtilis, Bacillus licheniformis, Trichoderma viride, Aspergillus niger, and yeast, and the proportions were B1 treatment (1:1:1:1:2), B2 treatment (2:2:1:1:2), and B3 treatment (3:3:1:1:2). The results showed that the contents of total organic carbon were enriched by 12.21%, 4.87%, and 1.90% in B1 treatment, B2 treatment, and B3 treatment, respectively. The total organic carbon contents of B1 treatment, B2 treatment, and B3 treatment were 402.00 ± 2.65, 366.33 ± 1.53, and 378.33 ± 2.08 g/kg, respectively. B1 treatment significantly increased the content of total organic carbon compared with the other two treatments (p < 0.05). Moreover, the ratio of 1:1:1:1:2 significantly reduced the moisture content, pH value, EC value, hemicellulose, and lignin contents (p < 0.05), and significantly increased the GI value and the content of humic acid carbon (p < 0.05). Consequently, the preservation of carbon might be a result not only of the enrichment of the humic acid carbon and the decomposition of hemicellulose and lignin, but also the increased OTU amount and Lactobacillus abundance. This result provided a ratio of microbial agents to preserve the carbon during goat manure aerobic composting.

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Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Cited by 26 publications

References 21 publications

Microbes as vital additives for solid waste composting

Microbes as vital additives for solid waste composting

Chemical Transformation of Humic Acid Molecules under the Influence of Mineral, Fungal and Bacterial Fertilization in the Context of the Agricultural Use of Degraded Soils

Effect of Microbial Inoculation on Carbon Preservation during Goat Manure Aerobic Composting

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