Evaluation of rotary drum composting for the management of invasive weed Mikania micrantha Kunth and its toxicity assessment

Kauser, Heena; Pal, S.; Haq, Izharul; Khwairakpam, Meena

doi:10.1016/j.biortech.2020.123678

Cited by 38 publications

(16 citation statements)

References 34 publications

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“…The carbon-to-nitrogen ratio (C/N) is usually used to evaluate the degree of compost maturity (Kauser et al 2020;Lei et al 2021). Compost with a C/N ratio less than 20 is considered mature, and values of 15 or less are superior (P et al 2009).…”

Section: Changes In C/n and Gi Of Bean Dregs During Compostingmentioning

confidence: 99%

Effect of Geobacillus toebii addition on composition transformations and microbial community in thermophilic bean dreg composting

Chen

Wu²,

Wang

et al. 2021

Preprint

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A thermophilic bacterium, Geobacillus toebii GT-02, was successfully isolated from horse dung. The effectiveness of Geobacillus toebii GT-02 addition on composition transformations and the microbial community in bean dreg composting at 70°C for 5 days was investigated (T1), and the control consisted of bean dreg compost without GT-02 (CK). After 5 days, T1 presented higher total nitrogen contents (2.77%) and lower carbon-to-nitrogen ratios (14.4) than CK (2.34% and 16.9, respectively). The germination index (GI) of T1 was 135%, which was 56% higher than that of CK (86%). The dry matter loss in T1 was 54.16% (26.82% higher than the CK value (42.82%)). The mean microbial number in T1 was 4.94x107 CFUs/g dry matter, which was 5.37 times that in CK. 16S rDNA sequencing identified Bacillus, Geobacillus and Thermobacillus as dominant in CK, while Bacillus, Ammoniibacillus and Geobacillus were dominant in T1. A canonical correspondence analysis showed that Geobacillus and Ammoniibacillus were positively correlated with the GI. Thus, composting with GT-02 can promote the maturity of bean dregs, and GT-02 has potential commercial application in thermophilic composting.

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Section: Changes In C/n and Gi Of Bean Dregs During Compostingmentioning

confidence: 99%

Effect of Geobacillus toebii addition on composition transformations and microbial community in thermophilic bean dreg composting

Chen

Wu²,

Wang

et al. 2021

Preprint

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“…Compared to other types of machines to produce compost, drum-type reactors are widely used due to the capability to ensure the specified uniformity of mixing the substrate components. Their advantages include high performance, the preservation of properties of substrate components, minimal energy consumption, a low noise level during operation, the ease of operation and installation [10][11][12][13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Consequently, taking into consideration equation (10), the condition for the absence of substrate particles' blocking on the drum blade during an agitation process takes the following form:…”

Section: The Simulation Of Reactor Parameters and The Substrate's mentioning

confidence: 99%

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Determining of the influence of reactor parameters on the uniformity of mixing substrate components

Golub¹,

Trehub²,

Holubenko³

et al. 2020

EEJET

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“…Increasing the efficiency of the bio-based raw materials composting process is achieved by optimizing the structural and technological parameters of the process [2,4] in accordance with the physicochemical properties of the starting substrate [5,6] in compliance with the microbiotic parameters of the compost produced [7,8].…”

Section: Introductionmentioning

confidence: 99%

Determining the thermal mode of bio-based raw materials composting process in a rotary-type chamber

Golub

Chuba²,

Грабар³

et al. 2021

EEJET

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One of the promising methods to dispose of agricultural bio-based raw materials is to produce compost by aerobic fermentation in rotary chambers. High efficiency of the composting process is achieved when a proper temperature mode is maintained at each phase of the process. Changes in temperature are directly related to the effective transformation of organic substrates by microorganisms and are the reason for the low quality of produced compost in terms of its agrochemical and microbiological parameters. It was established that a high-temperature regime is achieved on the condition that the amount of heat released during the biodegradation of raw materials by microorganisms is greater than the heat loss associated with the substrate aeration and surface cooling. Therefore, the time during which the fermented mass remains warm depends entirely on the substrate's physical-chemical characteristics, the parameters of the equipment, and the modes of its operation. To describe the established conditions, based on the equation of thermal balance, a mathematical model has been built. The model relates the thermal costs necessary to maintain the optimal temperature regime of the process to the substrate's moisture content and specific active heat generation, as well as to such an important thermal physical parameter of the chamber as the coefficient of heat transfer of the wall material. A rotary chamber was manufactured to investigate the thermal mode of the bio-based raw materials composting process. It has been experimentally established that the chamber walls' heat transfer coefficient of 1.6 W/(m2·°C), a value of the substrate's specific active heat generation of 9.2 W/kg, and a moisture content of 58 % provide for the thermal needs for the process with the release of 140 MJ of excess heat. The reported study could be the basis for the modernized methodology of thermal calculations of the bio-based raw materials composting process in closed fermentation chambers

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Evaluation of rotary drum composting for the management of invasive weed Mikania micrantha Kunth and its toxicity assessment

Cited by 38 publications

References 34 publications

Effect of Geobacillus toebii addition on composition transformations and microbial community in thermophilic bean dreg composting

Effect of Geobacillus toebii addition on composition transformations and microbial community in thermophilic bean dreg composting

Determining of the influence of reactor parameters on the uniformity of mixing substrate components

Determining the thermal mode of bio-based raw materials composting process in a rotary-type chamber

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