scholarly journals Effect of corn straw pretreatment on efficiency of biogas production process: Computer simulation

2020 ◽  
Vol 18 (4) ◽  
pp. 561-564
Author(s):  
Anja Antanasković ◽  
Maja Bulatović ◽  
Marica Rakin ◽  
Zorica Lopičić ◽  
Tatjana Šoštarić ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Production Process ◽  
Biogas Production ◽  
Agricultural Waste ◽  
Raw Material ◽  
Corn Straw ◽  
Material Degradation ◽  
Biogas Yield ◽  
Process Computer ◽  
The Impact

Anaerobic digestion is a natural process of organic material degradation by different kinds of microorganisms in the absence of oxygen. This process is used for industrial purpose to manage waste streams or to produce biogas. It gives a major contribution in reduction of harmful effects of organic waste disposal to the environment. The aim of agricultural waste pretreatment in biogas production is to decrease the retention time, improve utilization of raw material and improve the overall productivity and energy efficiency of the production process. In this paper the effects of combined chemical and mechanical pretreatment of corn straw biomass on biogas yield during anaerobic digestion of the feedstock were analyzed. The impact of pretreatment and process parameters in biogas production was analyzed by process simulation using the software SuperPro Designer. Using this tool, it was shown that alkaline pretreatment leads to an decrease of degradation time along with an increase in biogas yield.

Statistical modelling of the impact of some polyphenols on the efficiency of anaerobic digestion and the co-digestion of the wine distillery wastewater with dairy cattle manure and cheese whey

2010 ◽  
Vol 62 (3) ◽  
pp. 475-483 ◽  
Author(s):  
M. Akassou ◽  
A. Kaanane ◽  
A. Crolla ◽  
C. Kinsley
Keyword(s):  
Anaerobic Digestion ◽  
Dairy Cattle ◽  
Biogas Production ◽  
Degradation Kinetics ◽  
Inhibitory Effect ◽  
Cattle Manure ◽  
Coumaric Acid ◽  
Biogas Yield ◽  
Distillery Wastewater ◽  
The Impact

The objective of this study was to determine the effectiveness of anaerobic digestion in the treatment of polyphenols (PP) present in olive mill wastewater (OMW) and wine distillery wastewater (WDW). Anaerobic Toxicity Assay (ATA) was conducted to assess the impact of the most representative phenolic compounds present in OMW and WDW: catechol, tannins and p-Coumaric acid, on biogas production. The results from this study show that tannins do not present any inhibitory effect on methanogenesis at a concentration level of 1,664 ppm, whereas catechol has an inhibitory effect at 1,664 ppm. In addition, p-Coumaric acid was strongly inhibitory at 50 ppm. The co-digestion of OMW and WDW with other effluents was proposed as a solution for reducing the load of PP in the anaerobic medium. Biochemical methane potential (BMP) tests were carried out for dairy cattle manure and mixtures of five PP. A central composite design was implemented on the BMP tests to model the biogas production response and the degradation kinetics of PP. The co-digestion of WDW with cattle manure and/or whey was also investigated in BMP tests. The results show that the digestion was optimal at a ratio of 16: 64: 20 (WDW: manure: inoculum) with a maximum biogas yield of 172 mL/g of VS and 66% COD removal.

Experimental Study on Potential of Biogas Fermentation with Lily Straw

2012 ◽  
Vol 608-609 ◽  
pp. 396-401
Author(s):  
Hong Yang ◽  
Wu Di Zhang ◽  
Xing Ling Zhao ◽  
Jing Liu ◽  
Yu Bao Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Anaerobic Digestion ◽  
Ph Value ◽  
Biogas Production ◽  
Gas Production ◽  
The Other ◽  
Raw Material ◽  
Production Potential ◽  
Biogas Yield ◽  
The Third

This paper studies on the biogas production yield of which use the lily straw as raw material and the fermentation is batch by batch at 30°C. In the third day of fermentation, fermented liquid became acidic. But it can be back to normal with the action of the anaerobic microbe. Its biogas yield is higher than the other group to adjust pH value. So gas production potential of the lily straw is 475ml/gTS and 573ml/gVS with 31 days of anaerobic digestion. The volumetric biogas production rate reaches 0.19ml/ml/d.

scholarly journals Effect of Organic Waste Addition into Animal Manure on Biogas Production Using Anaerobic Digestion Method

2021 ◽  
Vol 10 (3) ◽  
pp. 623-633
Author(s):  
Fahmi Arifan ◽  
Abdullah Abdullah ◽  
Siswo Sumardiono
Keyword(s):  
Anaerobic Digestion ◽  
Fossil Fuels ◽  
Organic Waste ◽  
Biogas Production ◽  
Liquid Waste ◽  
Animal Manure ◽  
Raw Material ◽  
Chicken Manure ◽  
Cow Dung ◽  
Biogas Yield

One biomass form with a high potential to replace fossil fuels is biogas. Biogas yield production depends on the raw material or substrate used. This research was aimed to investigate abiogas production technique using an anaerobic digestion process based on a substrate mixture of a starter, cow dung, chicken manure, tofu liquid waste, and cabbage waste.The anaerobic digestion is a promised process to reduce waste while it is also producing renewable energy.Moreover, the process can digest high nutrients in the waste. The anaerobic digestion results showed that the combination producing the highest biogas amount was 200 mg starter mixed with a ratio of 70% cow dung, 15% chicken manure, and 15% tofu liquid waste. The larger the amount of cabbage waste, the lower the biogas production. The quadratic regression analysisand kinetics model based on the Gompertz equation was obtained for the variable with the highest yield, compared to 70% cow dung, 15% chicken manure, and 15% tofu liquid waste and the estimated kinetic parameters based on the Gompertz equations revealed that the value of P∞ = 2,795.142 mL/gr.Ts, Rm = 113, 983.777 mL/gr.Ts, and t = 10.2 days. The results also conluded that the use of  tofu liquid waste produced more biogas than cabbage waste. This study also successfully showed significant development in terms of the amount of biogas produced by adding organic waste to animal manure as the substrate used

Simulation of the Impact of Higher Ammonia Recycle Loads Caused by Upgrading Anaerobic Sludge Digesters

2005 ◽  
Vol 40 (4) ◽  
pp. 491-499 ◽  
Author(s):  
Jeremy T. Kraemer ◽  
David M. Bagley
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Treatment Plant ◽  
Anaerobic Sludge ◽  
Content Increase ◽  
Limited Information ◽  
Dynamic Simulations ◽  
Treatment Train ◽  
Temperature Liquid ◽  
The Impact

Abstract Upgrading conventional single-stage mesophilic anaerobic digestion to an advanced digestion technology can increase sludge stability, reduce pathogen content, increase biogas production, and also increase ammonia concentrations recycled back to the liquid treatment train. Limited information is available to assess whether the higher ammonia recycle loads from an anaerobic sludge digestion upgrade would lead to higher discharge effluent ammonia concentrations. Biowin, a commercially available wastewater treatment plant simulation package, was used to predict the effects of anaerobic digestion upgrades on the liquid train performance, especially effluent ammonia concentrations. A factorial analysis indicated that the influent total Kjeldahl nitrogen (TKN) and influent alkalinity each had a 50-fold larger influence on the effluent NH3 concentration than either the ambient temperature, liquid train SRT or anaerobic digestion efficiency. Dynamic simulations indicated that the diurnal variation in effluent NH3 concentration was 9 times higher than the increase due to higher digester VSR. Higher recycle NH3 loads caused by upgrades to advanced digestion techniques can likely be adequately managed by scheduling dewatering to coincide with periods of low influent TKN load and ensuring sufficient alkalinity for nitrification.

scholarly journals Innovations in anaerobic digestion: a model-based study

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Karol Postawa ◽  
Jerzy Szczygieł ◽  
Marek Kułażyński
Keyword(s):  
Mathematical Model ◽  
Anaerobic Digestion ◽  
Production Efficiency ◽  
Biogas Production ◽  
Biogas Plant ◽  
Methane Content ◽  
Pig Manure ◽  
Pig Slurry ◽  
Production Chain ◽  
The Impact

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.

scholarly journals Biogas potential of organic waste onboard cruise ships — a yet untapped energy source

2021 ◽  
Author(s):  
Kai Schumüller ◽  
Dirk Weichgrebe ◽  
Stephan Köster
Keyword(s):  
Energy Source ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Food Waste ◽  
Energy Demand ◽  
Organic Waste ◽  
Biogas Production ◽  
Biogas Yield ◽  
Cruise Ships ◽  
Detailed Presentation

AbstractTo tap the organic waste generated onboard cruise ships is a very promising approach to reduce their adverse impact on the maritime environment. Biogas produced by means of onboard anaerobic digestion offers a complementary energy source for ships’ operation. This report comprises a detailed presentation of the results gained from comprehensive investigations on the gas yield from onboard substrates such as food waste, sewage sludge and screening solids. Each person onboard generates a total average of about 9 kg of organic waste per day. The performed analyses of substrates and anaerobic digestion tests revealed an accumulated methane yield of around 159 L per person per day. The anaerobic co-digestion of sewage sludge and food waste (50:50 VS) emerged as particularly effective and led to an increased biogas yield by 24%, compared to the mono-fermentation. In the best case, onboard biogas production can provide an energetic output of 82 W/P, on average covering 3.3 to 4.1% of the total energy demand of a cruise ship.

The Influence of Leachate Refluence on Dry Mesophilic Co-Fermentation

2013 ◽  
Vol 295-298 ◽  
pp. 1735-1739
Author(s):  
Fu Bin Yin ◽  
Zi Fu Li ◽  
Shuang Hou ◽  
Xiao Feng Bai ◽  
Ting Ting Wang
Keyword(s):  
Biogas Production ◽  
Methane Content ◽  
Chicken Manure ◽  
Good Effect ◽  
Corn Straw ◽  
Biogas Yield

The main objectives of this research were to determine the effect of leachate refluence on biogas production for dry mesophilic co-fermentation of chicken manure and corn straw. The biogas production, the ratio of biogas production, methane content and pH were analyzed. The results showed that the leachate refluence has a significant impact on biogas production of dry co-fermentation. The cumulative biogas yield of the once in 48h has an increase by 10% and 5% for no reflux and once in 24h, respectively. The leachate refluence has little influence on the methane content, but it has good effect to keep pH in the optimum rang.

scholarly journals Biogas Production from Combined Irish Potato and Poultry Wastes: Optimization and Kinetic Studies

2018 ◽  
Vol 7 (3.36) ◽  
pp. 170
Author(s):  
Umar M. Ibrahim ◽  
Saeed I. Ahmed ◽  
Babagana Gutti ◽  
Idris M. Muhammad ◽  
Usman D. Hamza ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Parameters ◽  
Ph Value ◽  
Biogas Production ◽  
Irish Potato ◽  
Coefficient Of Determination ◽  
Optimum Conditions ◽  
Biogas Yield ◽  
Potato Waste ◽  
Initial Ph

The combination of Irish potato waste (IPW) and poultry waste (PW) can form a synergy resulting into an effective substrate for a better biogas production due to some materials they contain. In this work, optimization and kinetic study of biogas production from anaerobic digestion of IPW and PW was investigated. Response surface methodology (RSM) was applied to optimize conditions such as initial pH, solids concentrations and waste ratios. The anaerobic digestion of the two wastes was carried out in the mesophilic condition and Box-Behnken design (BBD) was used to develop and analyze a predictive model which describes the biogas yield. The results revealed that there is a good fit between the experimental and the predicted biogas yield as revealed by the coefficient of determination (R2) value of 97.93%. Optimization using quadratic RSM predicts biogas yield of 19.75% at the optimal conditions of initial pH value 7.28, solids concentration (w/v) 9.85% and waste ratio (IPW:PW) 45:55%. The reaction was observed to have followed a first order kinetics having R2 and relative squared error (RSE) values of 90.61 and 9.63% respectively. Kinetic parameters, such as rate constant and half-life of the biogas yield were evaluated at optimum conditions to be 0.0392 day-1 and 17.68 days respectively. The optimum conditions and kinetic parameters generated from this research can be used to design real bio-digesters, monitor substrate concentrations, simulate biochemical processes and predict performance of bio-digesters using IPW and PW as substrate.  

scholarly journals Reaction Kinetics Modelling for Dry Anaerobic Digestion of Hura Crepitans Invasive Species Lignocellulosic Biomass

2021 ◽  
Author(s):  
Akinola David Olugbemide ◽  
Blaž Likozar ◽  
Ana Oberlintner ◽  
Uroš Novak ◽  
Ekebafe Lawrence
Keyword(s):  
Anaerobic Digestion ◽  
Invasive Plant ◽  
Biogas Production ◽  
Test Procedure ◽  
Gompertz Model ◽  
Agricultural Crop ◽  
Kinetic Predictions ◽  
Hura Crepitans ◽  
The Impact ◽  
Dry Anaerobic Digestion

Abstract In this research study, the impact of the feedstock to the inoculum (F/I) amount ratio in the dry anaerobic digestion (DAD) of Hura crepitans leaves was evaluated. Measured biogas volumes, as well as the chemical kinetic predictions for exponential, logistic and Gompertz model, depicting the agreement of the simulations over time, were also determined. From the F/I equivalents 2, 4 and 6 at 22 % of packed total solids, which were considered in analysis test procedure, the DAD digester with F/I number 4 was the most promising in terms of biogas’ production rate. Its daily methane/carbon dioxide was 690 mL, while cumulative generation productivity was greater than 2 L/sample, respectively. On the other hand, the DAD reaction with F/I contained 6, recorded the lowest related expressed primary matter of < 1 L. An associated early commencement of the organic material breakdown in all bio vessels was indicative of a good start-up phase, which is one of the challenges, often encountered in DAD process. Furthermore, applied experimental methods revealed the direct correlation phenomena between biodegradability physical constants, measured molecular CH4/CO2 synthesis and simulations. Hura crepitans being an invasive plant species makes its lignocellulosic fractions desired in terms of valorisation, as it is not competing with agricultural crop products. Modelling can, moreover, contribute to consecutive operation optimisation, scaling and integrating, also taking dynamics under consideration. As opposed to bio-refining wood residues, where individual cellulose, hemicellulose or lignin biopolymers can be attained, degradation to yield CH4 is robust, as well as compatible in combustion.

Influence of Ultrasound on the Synthesis of Biogas During Disposal of Beer Spent Grain

2021 ◽  
pp. 33-38
Author(s):  
Владимир Владимирович Житков ◽  
Борис Николаевич Федоренко
Keyword(s):  
Anaerobic Digestion ◽  
Energy Production ◽  
Biogas Production ◽  
Organic Substances ◽  
Ultrasonic Pretreatment ◽  
Biogas Yield ◽  
Spent Grains ◽  
Efficient Resource ◽  
Spent Grain ◽  
Environmentally Friendly Process

Ультразвуковая предварительная обработка считается экологически чистым процессом для повышения биоразлагаемости органических веществ при анаэробном сбраживании. Однако количество потребляемой энергии во время предварительной обработки является проблемой, особенно в тех случаях, когда производство энергии является основной целью биогазовой установки. Основной целью настоящего исследования работы было изучение эффективности ультразвуковой предварительной обработки для увеличения производства биогаза из отходов пивоваренного производства - пивной дробины. Результаты показали, что применение частоты 40 кГц при температуре 40 °С соответственно привело к увеличению выхода биогаза на 83%. Методология показала положительный результат в отношении содержания метана и скорости производства биогаза. Использование ультразвуковой предварительной обработки в отношении пивоваренной дробины для производства биогаза, по-видимому, позволяет решить проблемы не только эффективной утилизации пивоваренных отходов, но и создать экономически эффективный ресурс возобновляемой энергии на пивоваренном или аффилированном с ним производстве. Ultrasonic pretreatment is considered an environmentally friendly process to increase the biodegradability of organic substances during anaerobic digestion. However, the amount of energy consumed during pretreatment is a problem, especially in cases where energy production is the main purpose of the biogas plant. The main purpose of this study was to study the effectiveness of ultrasonic pretreatment to increase the production of biogas from brewing waste - brewer's grains. The results showed that the use of a frequency of 40 kHz at a temperature of 40 °C, respectively, led to an increase in the biogas yield by 83%. The methodology showed a positive result in terms of methane content and biogas production rate. The use of ultrasonic pretreatment for brewing spent grains for biogas production seems to solve the problems of not only efficient disposal of brewing waste, but also to create an economically efficient resource of renewable energy in brewing or its affiliated production.

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