Using an Amylase Pretreatment of Pig Manure to Enhance Biogas Production

Abstract Background Increasing the efficiency of the biogas production process is possible by modifying the technological installations of the biogas plant. In this study, specific solutions based on a mathematical model that lead to favorable results were proposed. Three configurations were considered: classical anaerobic digestion (AD) and its two modifications, two-phase AD (TPAD) and autogenerative high-pressure digestion (AHPD). The model has been validated based on measurements from a biogas plant located in Poland. Afterward, the TPAD and AHPD concepts were numerically tested for the same volume and feeding conditions. Results The TPAD system increased the overall biogas production from 9.06 to 9.59%, depending on the feedstock composition, while the content of methane was slightly lower in the whole production chain. On the other hand, the AHPD provided the best purity of the produced fuel, in which a methane content value of 82.13% was reached. At the same time, the overpressure leads to a decrease of around 7.5% in the volumetric production efficiency. The study indicated that the dilution of maize silage with pig manure, instead of water, can have significant benefits in the selected configurations. The content of pig slurry strengthens the impact of the selected process modifications—in the first case, by increasing the production efficiency, and in the second, by improving the methane content in the biogas. Conclusions The proposed mathematical model of the AD process proved to be a valuable tool for the description and design of biogas plant. The analysis shows that the overall impact of the presented process modifications is mutually opposite. The feedstock composition has a moderate and unsteady impact on the production profile, in the tested modifications. The dilution with pig manure, instead of water, leads to a slightly better efficiency in the classical configuration. For the TPAD process, the trend is very similar, but the AHPD biogas plant indicates a reverse tendency. Overall, the recommendation from this article is to use the AHPD concept if the composition of the biogas is the most important. In the case in which the performance is the most important factor, it is favorable to use the TPAD configuration.

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Production of Bio Gas from Vegetable and Flowers Wastes Using Anaerobic Digestion

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.803 ◽

2015 ◽

Vol 787 ◽

pp. 803-808 ◽

Cited By ~ 3

Author(s):

A. Deepanraj ◽

S. Vijayalakshmi ◽

J. Ranjitha

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Research Work ◽

Pressure Gauge ◽

Pig Manure ◽

Future Research ◽

Digital Pressure ◽

Vegetable Wastes ◽

Main Component

The present research paper describes about the anaerobic digestion of vegetable (Banana, Cauliflower, potato, and sweet potato) and flower wastes (Rose, sambangi, gulmohar, marigold, golden shower tree, silk tree mimosa) in a 1L capacity of anaerobic digestor using pig manure as an inoculums. The digester was operated in the ratio of 1:1 of substrate to inoculums at RT. The substrate concentrations are varied such as 5%, 7%, and 10% was used and amount of gas produced was analysed using digital pressure gauge. The results obtained showed that, marigold flower had given higher yield of biogas than vegetable wastes and the digestion period was less. The average biogas production potential of withered flowers was observed as 14.36 g/kg in 5 days, where in case of vegetable wastes it was 10.0234 g/kg in 6 days. The study showed that flowers which are available in abundant in India is thrown away within a day, in the environment. These feedstocks are good feed stock for the production of biogas. The generation of biogas from flowers and vegetable waste upholds the concept of waste to wealth in enhancing sustainability of development. The future research work is mainly focused on the characterization of the main component present in the bio-gas using sophisticated instruments.

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Improved Biogas Production from Corn Stalks, Pig Manure and Eggshell

Journal of Advances in Biology & Biotechnology ◽

10.9734/jabb/2021/v24i430210 ◽

2021 ◽

pp. 39-47

Author(s):

U. A. Adekola ◽

I. Eiroboyi ◽

Y. Yerima ◽

T. E. B. Akinmoji ◽

L. O. Uti

Keyword(s):

Energy Source ◽

Renewable Energy Source ◽

Renewable Energy ◽

Room Temperature ◽

Fossil Fuel ◽

Biogas Production ◽

Pig Manure ◽

Corn Stalk ◽

The World ◽

Main Substrate

The need for an environmentally friendly energy source in the world has led to major diversification in renewable energy. Biogas provides a renewable energy source that will replace fossil fuel inevitably. The experiment was carried out using a self-designed laboratory-scale anaerobic biogas digester. The study was carried out at room temperature from 25 - 31°C for 20 days using corn stalk as the main substrate while Pig manure and eggshell were used as co-substrates. The findings showed that the biogas produced from the sample containing a blend of corn stalk, Pig manure, and eggshell resulted in higher biogas volume than the sample containing corn stalk and eggshell, corn stalk, and pig manure as well as the sample containing only corn stalk. This implies that the use of the corn stalk blend is a source of renewable energy. Thus, ensuring the sustainability of biogas production in the future.

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Evaluation on the Methane Production Potential of Wood Waste Pretreated with NaOH and Co-Digested with Pig Manure

Catalysts ◽

10.3390/catal9060539 ◽

2019 ◽

Vol 9 (6) ◽

pp. 539 ◽

Cited By ~ 10

Author(s):

Renfei Li ◽

Wenbing Tan ◽

Xinyu Zhao ◽

Qiuling Dang ◽

Qidao Song ◽

...

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Methane Production ◽

Biogas Production ◽

Untreated Wood ◽

Wood Waste ◽

Methane Yield ◽

Pig Manure ◽

Naoh Pretreatment ◽

Digestion Technique

Wood waste generated during the tree felling and processing is a rich, green, and renewable lignocellulosic biomass. However, an effective method to apply wood waste in anaerobic digestion is lacking. The high carbon to nitrogen (C/N) ratio and rich lignin content of wood waste are the major limiting factors for high biogas production. NaOH pre-treatment for lignocellulosic biomass is a promising approach to weaken the adverse effect of complex crystalline cellulosic structure on biogas production in anaerobic digestion, and the synergistic integration of lignocellulosic biomass with low C/N ratio biomass in anaerobic digestion is a logical option to balance the excessive C/N ratio. Here, we assessed the improvement of methane production of wood waste in anaerobic digestion by NaOH pretreatment, co-digestion technique, and their combination. The results showed that the methane yield of the single digestion of wood waste was increased by 38.5% after NaOH pretreatment compared with the untreated wood waste. The methane production of the co-digestion of wood waste and pig manure was higher than that of the single digestion of wood waste and had nonsignificant difference with the single-digestion of pig manure. The methane yield of the co-digestion of wood waste pretreated with NaOH and pig manure was increased by 75.8% than that of the untreated wood waste. The findings indicated that wood waste as a sustainable biomass source has considerable potential to achieve high biogas production in anaerobic digestion.

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Improved ADM1 for modelling C, N, P fates in anaerobic digestion process of pig manure and optimization approaches to biogas production

Renewable Energy ◽

10.1016/j.renene.2019.08.086 ◽

2020 ◽

Vol 146 ◽

pp. 2330-2336 ◽

Cited By ~ 4

Author(s):

Heng Li ◽

Zheng Chen ◽

Dun Fu ◽

Yuanpeng Wang ◽

Yanmei Zheng ◽

...

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Pig Manure ◽

Anaerobic Digestion Process ◽

Digestion Process

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Effects of Different Pre-processing Methods on Dry Anaerobic Fermentation of Sugarcane Leaves and Pig Manure

E3S Web of Conferences ◽

10.1051/e3sconf/202014502065 ◽

2020 ◽

Vol 145 ◽

pp. 02065

Author(s):

Xiaohong Huang ◽

Jing Jiao ◽

Jihua Du ◽

Zunxiang Li

Keyword(s):

Loading Rate ◽

Anaerobic Fermentation ◽

Biogas Production ◽

Environmental Issues ◽

Pig Manure ◽

Production Volume ◽

Volume Loading ◽

Processing Methods ◽

Long Time ◽

Fermentation Period

Using agricultural wastes for anaerobic fermentation to produce biogas can not only realize the resource utilization of the wastes, but also prevent the environmental issues caused by straw burning. Sugarcane leaves contain waxy layer, which will cause problems such as difficulty in degradation, long-time fermentation and low biogas production. This paper studies the effects on three pre-processing methods of adding rush rot agent, natural retting for 7 days and water moisture for 24 hours of dry anaerobic fermentation of sugarcane leaves and pig manure. The results show that natural retting for 7 days has the advantage of daily biogas production when the fermentation period is less than 20 days, but this method is not obviously different from that of water moisture for 24 hours. When taking total biogas production volume and volume loading rate as the indicators, water moisture for 24 hours is the best pre-processing method for dry anaerobic fermentation of sugarcane leaves and pig manure when the fermentation period is more than 20 days.

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Methods for the recovery of nutrients and energy from swine manure. 1. Biogas.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v29i1.17015 ◽

1981 ◽

Vol 29 (1) ◽

pp. 3-14

Author(s):

L. Boersma ◽

E. Gasper ◽

J.E. Oldfield ◽

P.R. Cheeke

Keyword(s):

Total Energy ◽

Production System ◽

Energy Input ◽

Biogas Production ◽

Swine Manure ◽

Pig Manure ◽

Pig Production ◽

Energy Value ◽

Total Energy Input

The recovery of nutrients from pig manure (300 l/day discharged by 100 pigs) during digestion for biogas production amounted to 1435 kg N, 350 kg P and 490 kg K per year. When spread on the 15.26 ha of land required to grow the corn and soybean for the pig ration, each hectare would receive 94 kg N, 23 kg P and 32 kg K per year. The energy value of the recovered fertilizer represents 4.4% of the total energy input of the pig production system. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Results of co-fermentation experiments in half industrial size

Review on Agriculture and Rural Development ◽

10.14232/rard.2014.2.454-458 ◽

2014 ◽

Vol 3 (2) ◽

pp. 454-458

Author(s):

László Sallai

Keyword(s):

Biogas Production ◽

Research Work ◽

Electrical Energy ◽

Energy Utilization ◽

Plant Production ◽

Pig Manure ◽

Local Conditions ◽

Agricultural Enterprises ◽

The Impact ◽

By Products

The research work presented proposes the study of the impact for the qualitative and the quantitative property of the biogas production by the co-fermentation of the bio-fuel industrial by-products and the dangerous liquid pig manure of the concentrated stock of the big pig farms. The energetic utilization of these materials means more profitable technology for the bio-fuel industry with a longer product course, bigger income for the agricultural enterprises selling the electrical energy, the heat energy, getting support for the demolition of the dangerous materials, savings in the replacement of the plant nutrition with the utilization of the bio-manure, increases the performance of the plant production, making harmless the dung which means a big environmental load. Because of the profitability of bio-energy utilization depends on the local conditions it is necessary to do experiments to try the available composition of organic wastes in the ratio of the formation in advance. We have to investigate the different ways of technology and recipe of basic and by-products to increase the production.

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

E3S Web of Conferences ◽

10.1051/e3sconf/202128602010 ◽

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.

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