Effects of initial C/N ratio on organic matter degradation of composting of rose oil processing solid wastes

Eki̇nci̇, Kamil; Tosun, İsmaı̇l; Bıtrak, B.; Kumbul, Barbaros Salih; Şevik, Fevzi; Sülük, Kemal

doi:10.1007/s13762-018-1947-9

Cited by 18 publications

(7 citation statements)

References 21 publications

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“…This parameter should decrease during composting due to the loss of carbon and TN content per unit material [27,39]. Moreover, the initial C/N ratio highly influences the composting process as it directly affects the degradation of materials mediated by microorganisms [31]. In this study, the initial C/N ratio was 43 (Fig.…”

Section: Total Nitrogen and C/n Ratiomentioning

confidence: 85%

“…The initial value was about 5.3, and a neutral pH value of 7.20 was observed after the 8th day (thermophilic phase), possibly due to the formation of carbonates, bicarbonates, and strong bases such as KOH [16,19]. Together with the release of ammonia/ammonium by the breakdown of proteins, these compounds tend to neutralize and even alkalinize the compost [30,31]. The pH value is, therefore, an important parameter to evaluate compost maturity and stability [32].…”

Section: Determination Of Temperature and Ph Value During The Compost...mentioning

confidence: 99%

“…In composting, microbial activity drives OM degradation with higher rates in the thermophilic phase where labile organic compounds are mineralized [31]. However, Fig.…”

Section: Determination Of Moisture Content Organic Matter and Total O...mentioning

confidence: 99%

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Characterization of low density polyethylene greenhouse films during the composting of rose residues

et al. 2022

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This study presents an evaluation of a potential alternative to plastic degradation in the form of organic composting. It stems from the urgent need of finding solutions to the plastic residues and focuses on the compost-based degradation of greenhouse film covers in an important rose exporter company in Ecuador. Thus, this study analyzes the physical, chemical, and biological changes of rose wastes composting, and also evaluates the stability of new and aged agricultural plastic under these conditions. Interestingly, results of compost characterization show a slow degradation rate of organic matter and total organic carbon, along with a significant increase in pH and rise of bacterial populations. However, the results demonstrate that despite these findings, composting conditions had no significant influence on plastic degradation, and while deterioration of aged plastic samples was reported in some tests, it may be the result of environmental conditions and a prolonged exposure to solar radiation. Importantly, these factors could facilitate the adhesion of microorganisms and promote plastic biodegradation. Hence, it is encouraged for future studies to analyze the ecotoxicity of plastics in the compost, as well as isolate, identify, and evaluate the possible biodegradative potential of these microorganisms as an alternative to plastic waste management.

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Section: Total Nitrogen and C/n Ratiomentioning

confidence: 85%

Section: Determination Of Temperature and Ph Value During The Compost...mentioning

confidence: 99%

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Characterization of low density polyethylene greenhouse films during the composting of rose residues

et al. 2022

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“…Composting is a bioconversion process that converts biodegradable waste to nutrient-rich products which can be used as biofertilizer to enhance the fertility of the soil [5,6] , biopesticides to manage plant diseases, and bioremediation to stabilize heavy metals in the contaminated soil [7][8][9] . During the transformation of organic waste in the composting process, carbon and nitrogen are the most vital nutrients for microorganisms to build cell structures and acquire metabolic energy [10] , and the initial Carbon to Nitrogen ratio (C/N) of feedstock is one of the crucial factor influencing degradation rate and nutrients losses, which can be adjusted with different bulking agent [11][12][13] .…”

Section: Introduction mentioning

confidence: 99%

Method for C/N ratio estimation using Mask R-CNN and a depth camera for organic fraction of municipal solid wastes

Huang

Zhang

Xiao

et al. 2021

International Journal of Agricultural and Biological Engineering

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Fast assessment of the initial carbon to nitrogen ratio (C/N) of organic fraction of municipal solid waste (OFMSW) is an important prerequisite for automatic composting control to improve efficiency and stability of the bioconversion process. In this study, a novel approach was proposed to estimate the C/N of OFMSW, where an instance segmentation model was applied to predict the masks for the waste images. Then, by combining the instance segmentation model with the depth-camera-based volume calculation algorithm, the volumes occupied by each type of waste were obtained, therefore the C/N could be estimated based on the properties of each type of waste. First, an instance segmentation dataset including three common classes of OFMSW was built to train mask region-based convolutional neural networks (Mask R-CNN) model. Second, a volume measurement algorithm was proposed, where the measurement result of the object was derived by accumulating the volumes of small rectangular cuboids whose bottom area was calculated with the projection property. Then the calculated volume was corrected with linear regression models. The results showed that the trained instance segmentation model performed well with average precision scores AP 50 = 82.9, AP 75 = 72.5, and mask intersection over unit (Mask IoU) = 45.1. A high correlation was found between the estimated C/N and the ground truth with a coefficient of determination R 2 =0.97 and root mean square error RMSE = 0.10. The relative average error was 0.42% and the maximum error was only 1.71%, which indicated this approach has potential for practical applications.

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“…Onursal and Ekinci 22 studied the influence of the initial C/N ratio on compost mass ratio and energy consumption of the aeration system for composting agro‐industrial wastes. Ekinci et al 23 reported that the initial C/N ratio influenced the composting process, thereby directly affecting the microbial degradation. Şevik et al 24 experimented the impact of the initial C/N ratio on loses for composting olive pomace.…”

Section: Introductionmentioning

confidence: 99%

Effect of initial C/N ratio on composting of two‐phase olive mill pomace, dairy manure, and straw

Eki̇nci̇

Tosun

Kumbul

et al. 2020

Env Prog and Sustain Energy

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Composting plants should be operated at a high degradation rate in order to lower their capital and operational costs. Initial C/N ratio is one of the most influential factors on the composting process. This study aimed to determine the impacts of initial C/N ratio on operational composting parameters of two‐phase olive mill pomace with separated dairy manure. Five initial C/N ratios ranging from 29.43 to 43.33 were examined using fifteen 100 L cylindrical reactors. The highest decomposition rate was estimated at 0.02 day−1 with the C/N ratio of 34.49. The maximum relative heat generation was obtained with the C/N ratio of 36.07. The C/N ratio of ≅33 reduced the composting cost of process‐based total airflow supplied per dry matter and organic matter loss. The maximum throughput capacity was obtained when the compost blend had the C/N ratio of ≅37.24. It was concluded that operating the composting of two‐phase olive mill waste, separated dairy manure, and straw with the boundary of the initial C/N ratios between 33 and 37 was recommended.

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Effects of initial C/N ratio on organic matter degradation of composting of rose oil processing solid wastes

Cited by 18 publications

References 21 publications

Characterization of low density polyethylene greenhouse films during the composting of rose residues

Characterization of low density polyethylene greenhouse films during the composting of rose residues

Method for C/N ratio estimation using Mask R-CNN and a depth camera for organic fraction of municipal solid wastes

Effect of initial C/N ratio on composting of two‐phase olive mill pomace, dairy manure, and straw

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