scholarly journals CREATION OF A COMPUTER-ASSISTED MATHEMATICAL MODEL FOR THE RAW MATERIALS BIOLOGICAL PROCESSING

2020 ◽  
Vol 17 (35) ◽  
pp. 640-654
Author(s):  
Manat B. TLEBAYEV ◽  
Bolotbek I. BIIBOSUNOV ◽  
Zhazira K. TASZHUREKOVA ◽  
Marina A. BAIZHARIKOVA ◽  
Zamira K. AITBAYEVA
Keyword(s):  
Mathematical Model ◽  
Alternative Energy ◽  
Methane Concentration ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Raw Materials ◽  
Computer Assisted ◽  
Operational Parameters ◽  
Fermentation Time ◽  
Biogas Yield

During anaerobic fermentation, the alternation of liquid and solid substances in the substrate makes the bacteria adapt to changing conditions, which significantly reduces the biogas yield, reduces the methane concentration in it, and increases the retention time of the substrate in the bioreactor. The solution to this problem when using cavitation destruction can not only minimize temperature nonuniformity but also solve the problem of the same load on the biocenosis and maximum contact surface of bacteria during anaerobic fermentation in the bioreactor. Studies have shown that the composition and quantity of biogas are not constant and depend on the type of substrate being processed and the biogas production technology. To stabilize the composition of the resulting biogas and bring it to a high-quality, independent alternative energy source, it is possible using membrane destruction or crushing of organic raw materials. The energy consumption, fermentation time, and methane concentration in the final biogas output depend on the primary treatment. This work proposes a mathematical model of the process of crushing, dispersing, and blending waste from dairy and fattening farms, which allows to determine and optimize its operating parameters, as well as to promote effective anaerobic fermentation of the substrate in the bioreactor. To determine the mathematical model for the raw materials biological processing with known theoretical or experimental parameters, numerical methods were used, which are one of the powerful mathematical tools for solving the problem. The results of the operational parameters of the studied processes were obtained using the Mathcad environment and tested in the SCADA Trace Mode 6.10.1 automated process control and monitoring software package.

Experimental Study on Energy Conversion Efficiency of Biogas Fermentation of Sorghum Distilled Residue Based on Properties of Raw Materials

2013 ◽  
Vol 675 ◽  
pp. 374-378
Author(s):  
Bin Yang ◽  
Fa Gen Yang ◽  
Wu Di Zhang ◽  
Fang Yin ◽  
Xing Ling Zhao ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Biogas Production ◽  
Raw Materials ◽  
Clean Energy ◽  
Energy Conversion Efficiency ◽  
Raw Material ◽  
Fermentation Time ◽  
Heating Value ◽  
Biogas Yield

In order to gain biogas production potential and energy conversion efficiency of biogas fermentation of sorghum distilled residue (SDR), the anaerobic batch fermentation experiments were performed at 30 degrees Celsius. After experiments, we got experimental results as follows: biogas production of SDR during total fermentation time of 28days is 2885mL; properties of raw materials including: TS is 88.58%, VS is 16.69%, heating value is 15.684kJ/g, TS biogas yield is 220mL/g, VS biogas yield is 1300ml/g, raw material biogas yield is 190mL/g, and energy conversion efficiency of biogas fermentation of SDR is 30.38%. The results indicate that biogas fermentation is an effective new method to recycle clean energy from SDR.

scholarly journals Analysis of the composition and formation of biogas produced during the processing of biological waste by anaerobic digestion technologies

2010 ◽  
Vol 58 (5) ◽  
pp. 171-178 ◽  
Author(s):  
Lubomír Hnilica ◽  
Jiří Fryč ◽  
Bořivoj Groda
Keyword(s):  
Anaerobic Digestion ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Raw Materials ◽  
Energy Crops ◽  
Operational Parameters ◽  
Operation System ◽  
Data Set ◽  
Sufficient Energy ◽  
Biogas Plants

This work compares the operating system of anaerobic fermentation of agricultural biogas plants with realization using biowaste. It deals with the operation system of anaerobic fermentation of agricultural biogas plants and implement an appropriate system to enable the use of biowaste. Based on the comparison of technological solutions and operational parameters of specific sites has been designed to allow the system biowaste were made a practical experiment to verify the assumption of increased biogas production. In experiments used substrates, which are industrially produced from the available bio-wastes, treated and then provide to operator of biogas plants. The work was carried out practical measurements to verify the production of biogas from different substrates. Utilize of nominal electric power using biowaste amounted up to 97.66%. Processing of such modified substrates in anaerobic digestion technology can greatly affect the amount of energy crops. Benefit of waste is governed primarily by such projects, where is the problem of ensuring sufficient energy crops. The proposed composition of raw materials also allows the implementation of the existing ope­ra­tion of anaerobic digestion. Operational data on real operations demonstrate the real possibility of further development of the area and secondly the use of biogas plants as well as in the preparation of suitably prepared substrates for the operators. The entire data set underwent a complete statistical analysis. Differences between variants were statistically significant.

scholarly journals Effects of Different Material Total Solid on Biogas Production Characteristics

2018 ◽  
Vol 38 ◽  
pp. 02006
Author(s):  
Yu-Ming Sun ◽  
Xiao-Mei Huang ◽  
Yin-Hu Kang
Keyword(s):  
Fossil Fuels ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Raw Materials ◽  
Rapid Development ◽  
Clean Energy ◽  
Total Solid ◽  
Biogas Yield ◽  
The Past ◽  
Production Characteristics

In China, livestock manure emission has resulted in severe pollution to the environment and it is an efficient spreading agent of diseases. For this reason, the biogas has gotten a rapid development in the past few decades. As a kind of renewable and clean energy, many studies have indicated the prospect of biogas to replace fossil fuels in the future. However, the methane industrial production process is unstable due to various factors. Therefore, it is necessary to enhance the biogas fermentation efficiency. In this paper, the influences of the raw materials and the total solids (TS) concentration on biogas production characteristics are studied, where the utilization of raw materials can be reflected by the biogas production rate in the results. The results showed the anaerobic fermentation cycle is prolonged and biogas yield increases, but the utilization decreases with TS increases.

scholarly journals The generation of a mathematical model of the biogas production process from organic municipal solid waste

2020 ◽  
Vol 180 ◽  
pp. 02019 ◽  
Author(s):  
Marzhan Temirbekova ◽  
Madina Aliyarova ◽  
Iliya Iliev ◽  
Aliya Yelemanova ◽  
Saule Sagintayeva
Keyword(s):  
Mathematical Model ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Biogas Plant ◽  
Model Parameters ◽  
Biochemical Processes ◽  
Biogas Plants ◽  
The Mathematical Model

This paper justifies the efficiency of the biogas collection and utilization at the MSW (municipal solid waste) landfill in Almaty with the installation of several modern biogas plants. The optimal mode of processes occurring in a biogas plant is determined by computer generated simulations. Mathematical model parameters were identified to describe biochemical processes occurring in a biogas plant. Two approaches are used to resolve the mathematical model: the finite-difference method for solving the system of differential equations and simulation modeling by using the Any Logic package. A program is written in the algorithmic language C ++. Numerous calculations were carried out, the results of which are presented in curves and their qualitative picture is consistent with the ongoing processes. The created computer program allows to make a preliminary forecast of anaerobic fermentation occurring in the bioreactor depending on volume of the substrate, methane microorganisms and temperature conditions.

Experimental Study on Potential of Biogas Fermentation with Punica granatum Peel

2013 ◽  
Vol 763 ◽  
pp. 151-155 ◽  
Author(s):  
Li Juan Zhang ◽  
Wu Di Zhang ◽  
Fang Yin ◽  
Xing Ling Zhao ◽  
Jing Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Batch Fermentation ◽  
Biogas Production ◽  
Punica Granatum ◽  
Fermentation Time ◽  
Biogas Yield ◽  
Experimental Group

Biogas fermentation with Punica granatum peel was studied at 30°C by batch fermentation in this experiment. The results indicated that the net biogas production of the experimental group during total fermentation time of 35d was 1900mL. Further, we calculated that the biogas yield of Punica granatum peel was 264mL/g TS or 271mL/g VS.

scholarly journals Study of regime parameters of the fermenter in the production of biogas from animal liquid waste materials

2021 ◽  
Vol 286 ◽  
pp. 02010
Author(s):  
Penka Zlateva ◽  
Angel Terziev ◽  
Krastin Yordanov
Keyword(s):  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Raw Materials ◽  
Organic Fertilizer ◽  
Liquid Waste ◽  
Ambient Air ◽  
Chicken Manure ◽  
Pig Manure ◽  
Materials Used ◽  
The Impact

The focus of the present study is a small biogas power plant for anaerobic fermentation of several types of animal waste raw materials used for biogas production. The impact of some of the characteristics of substances such as composition, temperature, humidity, and pH of the mixture in the bioreactor has been considered. The above is vital for optimizing the fermentation process, and also to improve the biogas production process. The plant is located in Northeastern Bulgaria and the raw liquid manure is supplied by several neighboring small farms. The annual quantities of raw waste are as follows: cow manure - 1252 t / a; chicken manure - 427 t / a and pig manure - 639 t / a. The manure is collected in a preliminary tank and then pumped to the bioreactor. The fermenter itself is a hermetically sealed and thermally insulated tank where constant temperature is maintained. It is equipped with a stirring system, which helps the mixing and homogenization of the substrate. The tests were performed during three charges of the installation. The fermentation takes approximately 23 up to 25 days. The experiments were performed during the summer and autumn seasons when the ambient air temperature varies from 28 to 45 °C. The biogas can be used as an energy carried as the obtained organic fertilizer is suitable for agriculture purposes.

scholarly journals Research of Mathematical Model of Biogas Production from Plant Raw Materials

2018 ◽  
pp. 127
Author(s):  
А.Г. Топаж ◽  
Л.А. Хворова ◽  
А.В. Жариков ◽  
А.А. Баюк
Keyword(s):  
Mathematical Model ◽  
Biogas Production ◽  
Raw Materials ◽  
Plant Raw Materials

Biogas production from silage maize hybrids

2011 ◽  
Vol 59 (3) ◽  
pp. 223-229
Author(s):  
Z. Hegyi ◽  
Z. Zsubori-Tóth ◽  
J. Pintér ◽  
C. Marton
Keyword(s):  
Dry Matter ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Starch Content ◽  
Sugar Content ◽  
Grain Filling ◽  
Strong Positive Correlation ◽  
Vegetative Period ◽  
Positive Correlation ◽  
Biogas Yield

Experiments have been underway in Martonvásár for many years to develop leafy silage hybrids, which have a greater aboveground mass than conventional silage hybrids. The best hybrids for biogas production would be those that produce a large quantity of biomass and are rich in starch. The chief characteristic of leafy hybrids is that they have more leaves than normal hybrids. Due to this enhanced leaf area above the ear, the vegetative period of leafy genotypes is shorter, while the grain-filling period is longer, which has a positive effect on both yield and grain quality. The results of the present experiment show that during the anaerobic fermentation of the silage, leafy hybrids produced more biogas (640 l per 1000 g dry matter) than conventional hybrids (606 l per 1000 g dry matter). There were no significant differences between the methane contents of the leafy and non-leafy hybrids tested in the experiment. A strong positive correlation was found between biogas yield and the starch content of the silage, and a moderate positive correlation between biogas yield and the sugar content. The correlation between biogas yield and the lignin and protein contents was negative, in accordance with other literary data.

A Study on Dry Anaerobic Fermentation Technology of Pineapple Leaf Residue

2011 ◽  
Vol 236-238 ◽  
pp. 178-182
Author(s):  
Yi Guo Deng ◽  
Jin Li Wang ◽  
Jing Jiao ◽  
Yong Zheng ◽  
Gang Wang ◽  
...  
Keyword(s):  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Orthogonal Experiment ◽  
Gas Production ◽  
Inoculum Size ◽  
Solid Content ◽  
Raw Material ◽  
Biogas Yield ◽  
Fermentation Temperature ◽  
Leaf Residue

A self-designed constant temperature fermenter was manufactured and used for this study. Dry anaerobic fermentation experiments were conducted with sugarcane leaf residue as raw material. With the C/N ratio being 25:1, various total solids concentrations (TS), inoculum sizes and fermentation temperatures were selected to study biogas production characteristics. The experiment results showed that biogas yield increased rapidly during the initial stage of reaction, decreased quickly after reaching the peak, and the decrease slowed down at some level. Orthogonal experiment results showed that both fermentation temperature and solids concentration showed significant effects on gas production yield. Fermentation temperature showed the most significant effect, while the effect of inoculum size was not significant on gas yield. The optimum fermentation performance was obtained at 20% solid content, 35°C fermentation temperature, and 30% inoculum size.

Experimental Study on Biogas Production by Mesophilic Fermentation with Dimocarpus Longan Pericarp

2014 ◽  
Vol 937 ◽  
pp. 502-507
Author(s):  
Li Juan Zhang ◽  
Wei Dong Lin ◽  
Wu Di Zhang ◽  
Fang Yin ◽  
Xing Ling Zhao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Batch Fermentation ◽  
Biogas Production ◽  
Control Group ◽  
Production Potential ◽  
Fermentation Time ◽  
Biogas Yield ◽  
Dimocarpus Longan ◽  
Experimental Group

In order to gain the biogas production potential from pericarp of longan (Dimocarpus longan Lour.) fruits, the anaerobic batch fermentation which were divided into the control group (120mL inoculum), the experimental group (120mL inoculum and 15g Dimocarpus longan pericarp) were performed at 30°C.The results indicated that the net biogas production of the experimental group during total fermentation time of 45d was 2455mL. Further, it was calculated that the biogas yield of Dimocarpus longan pericarp was 269mL/g TS or 294mL/g VS.

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