Mathematical model and operation modes of drum-type biofermenter

Uvarov, Roman; Брюханов, А Ю; Spesivtsev, A. V.; Spesivtsev, Vasiliy

doi:10.22616/erdev2017.16.n212

Cited by 5 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Treating the experimental results using the software Statistica 11.0 (StatThusft, USA) produced the regression equation in an encoded form (15) Regression equation:…”

Section: Results Of An Experimental Study Into the Thermal Regime Of Bio-based Raw Materials Composting Processmentioning

confidence: 99%

“…The authors of work [14,15] report a model of the fermentation process, which relates the simultaneous transfer of air, heat, and moisture, which is inevitable in the exothermic processes of processing organic materials, to heat loss to the environment. They proposed, as an optimization criterion, a reduction in the loss of heat, which is released by the installation during the fermentation process.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Our analysis of [11][12][13][14][15][16] reveals that understanding and studying the phenomena of energy generation and transmission during composting is an important parameter in monitoring, managing, and optimizing composting processes.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 2 more Smart Citations

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

Golub

Chuba²,

Грабар³

et al. 2021

EEJET

View full text Add to dashboard Cite

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

show abstract

“…Treating the experimental results using the software Statistica 11.0 (StatThusft, USA) produced the regression equation in an encoded form (15) Regression equation:…”

Section: Results Of An Experimental Study Into the Thermal Regime Of Bio-based Raw Materials Composting Processmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 1 more Smart Citation

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

Golub

Chuba²,

Грабар³

et al. 2021

EEJET

View full text Add to dashboard Cite

show abstract

“…The daily and annual manure output was calculated by the methodology elaborated and tested on 30 livestock and poultry farms [9]. The daily productivity of bio-fermenters depended on their dimension range substantiated by the guaranteed disinfection of the material [10][11][12][13].…”

Section: Methodsmentioning

confidence: 99%

Good manure management: case study of dairy farm with loose housing system

Uvarov

Vasileva

Vorobyeva

2020

19th International Scientific Conference Engineering for Rural Development Proceedings

View full text Add to dashboard Cite

One of the most important directions of economic development is improving the environmental safety of production. Farm manure is the factor, which has the greatest effect on the environmental sustainability of the local agroecosystem. The rational manure handling system reduces the negative impact on the environment. Application of sustainable nature management principles allows producing various types of useful products, for example, bedding for farm animals. Thereby, the economic costs of manure processing and the purchase of bedding materials drop, and the production profitability increases. Three manure-processing options, which are used to produce bedding from manure, were considered for a dairy farm with the cow stock of 100 head. Option 1 -solid-liquid manure separation, aerobic fermentation of the solid fraction in a drum bio-fermenter and longterm storing (maturing) of the liquid fraction. Option 2 -mixing the native manure with peat and the subsequent aerobic fermentation in a drum bio-fermenter. Option 3 -mixing the native manure with peat and the subsequent aerobic fermentation in a chamber bio-fermenter. According to the study results, Option 1 had the capital costs of 395 914 EUR, the operational costs of 151 302 EUR, the labour inputs of 0.45 man-hours•t -1 , and the payback period of 2.5 years. Options 2 and 3, requiring the addition of peat as a moisture absorber, showed higher capital costs (1 416 571 EUR and 1 030 429 EUR, respectively), operating costs (457 305 EUR and 376 922 EUR, respectively) and labour inputs (0.84 and 0.94 man-hours•t -1 , respectively), resulting in negative profitability. The choice of a rational manure-processing technology allows the farmers to reduce costs and to receive an additional profit.

show abstract