Numerical simulation of composting process for mixture of organic fraction of municipal solid waste and poultry manure

Petrić, Ivan; Avdihodžić, Edisa; Ibrić, Nidret

doi:10.1016/j.ecoleng.2014.12.003

Cited by 45 publications

(19 citation statements)

References 30 publications

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“…These C/N ratios were used before also by other authors: 30.58 by [33], 49-53 by [34], ≈50 by [35]. The authors of [36] recommended adoption of initial C/N values between 25 and 40 or even 50 for composting. During the composting process, the C/N values are decreasing [37].…”

Section: Resultsmentioning

confidence: 99%

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Ghinea

Leahu

2020

Processes

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The aim of this study was to investigate and evaluate the composting potential of fruit and vegetable waste with sawdust in different combinations and to establish the relationship between microorganisms and physico-chemical parameters. Three samples were made with the C/N ratios of 50 (sample 1), 45 (sample 2), and 30 (sample 3) by adding fruit waste (apple, banana, orange, and kiwi peels) and vegetable waste (cabbage leaves, potato and carrot peels). The total amount of fruit and vegetable waste was approximately 2 kg in each sample to which different quantities of sawdust were added (1.23, 0.14, and 0.203 kg) in order to obtain the C/N ratios proposed and to limit the odor. Composting process was monitored over 70 days, while physico-chemical and microbiological analyses were performed. Results showed that in the first week pH is acidic and electrical conductivity values are high for all three samples, and then the pH values increase during the composting process, while electrical conductivity values decrease. The nitrogen content is low in all samples and will decrease during the first five weeks of the composting process, then begin to increase slightly. Cr, Cu, Ni, and Zn values in the all three compost samples are below threshold values. During the composing process the microbial communities are constantly changing. The compost was successfully obtained and meets the requirement standards for agricultural use. It can be concluded that there is statistically significant association between the microorganisms and physico-chemical indicators.

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Section: Resultsmentioning

confidence: 99%

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Ghinea

Leahu

2020

Processes

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“…Ideally, necessary C/N ratio lies in the range, 25-35; stating that micro-organisms required 30 parts of C per unit part of N (Kutsanedzie et al, 2015). Nevertheless, some authors observed good results even with an initial C/N values between 20-50 (Kumar et al, 2010;Yang et al, 2015;Petric et al (2015)). A higher C/N ratio (compared to recommended) slowed down composting speed and reported nutrient deficiency to microbiota, due to excessive accumulation of the substrates.…”

Section: A) C/n Ratiomentioning

confidence: 99%

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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“…The volume reduction is a result of the organic matter degradation by microbial activity during the composting process has also been pointed out by several investigators [10,32]. Additionally, previous studies investigating the change of physical properties of organic wastes during the composting phase have demonstrated that high levels of biodegradable organic matter increased the capacity of the microorganisms to oxidise the material, and consequently reduced the volume [17,33].…”

Section: Volume Reductionmentioning

confidence: 71%

“…A mesophilic phase, characterized by the proliferation of the microbiota, a thermophilic phase where a high rate of biodegradation, the growth of thermophilic organisms and the inhibition of non-thermotolerant organisms occur and the nal phase that includes a period of cooling, stabilization and maturation, characterized by the growth of mesophilic organisms and the humi cation of the compost [8,9]. It is interesting to note that the moisture conditions essentially impinge microbial activity, oxygen uptake rate, temperature and the porosity level within composting [10]. An inverse relation exists between moisture content and temperature, exhibiting an increase in temperature as the moisture content drops [11].…”

Section: Introductionmentioning

confidence: 99%

“…Although several studies have addressed the optimization of composting of various organic wastes [7,10,11,[14][15][16][17], information on composting of biodegradable domestic solid wastes using effective microorganism inoculants as an accelerator to speed up the composting process and increased nutrients in the compost has not been well documented. Therefore, it is essential to study the effect of microbial inoculant on the composting process.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Microbial Inoculant on Composting of Biodegradable Domestic Solid Wastes

Dang

2021

Preprint

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This study investigated the effect of microbial inoculant (Emuniv) on composting of biodegradable domestic solid wastes for over 30 days. Three different types of treatments were used for the composting of source separated domestic solid waste. The results showed that the use of microbial inoculant in the composting of domestic solid wastes enhanced the biodegradation of composted organic material, which is evident from the considerable changes in temperature, moisture content and volume reduction with time. The compost treatments with Emuniv inoculant recorded higher temperature for the duration of composting phases, compared to treatment without Emuniv inoculant. Whereas, the moisture content and volume reduction of all treatments was showed a decreasing trend during the composting process. The larger reduction was seen in the treatments with Emuniv inoculant. Additionally, according to the results of analysis of variance (ANOVA), there was a statistically significant difference in temperature, moisture content and volume reduction between treatments. Moreover, the utilisation of microbial inoculant in composting was also can improve the quality of final compost product as reflected by the total nitrogen and available phosphorus contents in the compost product were higher than in the control.

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Numerical simulation of composting process for mixture of organic fraction of municipal solid waste and poultry manure

Cited by 45 publications

References 30 publications

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Microbes as vital additives for solid waste composting

Influence of Microbial Inoculant on Composting of Biodegradable Domestic Solid Wastes

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