scholarly journals POSSIBILITIES TO USE FISH WASTE FOR ENERGY PRODUCTION

2018 ◽  
Author(s):  
Virginija SKORUPSKAITĖ ◽  
Eglė SENDŽIKIENĖ ◽  
Milda GUMBYTĖ
Keyword(s):  
Biogas Production ◽  
Fish Farming ◽  
Wastewater Sludge ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Process Conditions ◽  
Waste Biomass ◽  
Fish Waste ◽  
Biogas Yield ◽  
Dead Fish

The secondary raw materials of fish can be used for various purposes in food industry, agriculture, etc. No less important way for usage of secondary raw fish, dead fish and fish farming sludge is the utilization of mentioned feedstocks for energy purposes, i.e. biofuels production. In this reearch, the possibilities of the consumption of dead fish and fish farming sludge for biodiesel and biogas production has been studied. The influence of the basic biodiesel production parameters, including the methanol to oil molar ratio, amount of catalyst, temperature and process duration on transesterification yield was determined. The guantitative and gualitative research of biogas production using different substrates such as fish waste, fish farming sludge and substrates composed of fish waste (de-oiled and non de-oiled biomass)+fish farming sludge and fish farming sludge+wastewater sludge was performed. The biodiesel yield higher than 96.5% could be achieved under the following process conditions: methanol/oil molar ratio – 4:1, amount of enzyme content – 7% from oil mass, temperature – 40 ° C, reaction time – 24 hours. The highest biogas yield (1224 ml/gVS) was determined using wet fish waste biomass and mixed substrates consisted of fish waste and fish farming sludge. The results of qualitative biogas research revealed, that biogas produced from both homogeneous and heterogeneous substrates contained more than 60% of methane. The highest calorific value (app. 70% of methane) had biogas gained from fish waste biomass.

scholarly journals Continuous Integrated Process of Biodiesel Production and Purification—The End of the Conventional Two-Stage Batch Process?

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 403
Author(s):  
Matea Bačić ◽  
Anabela Ljubić ◽  
Martin Gojun ◽  
Anita Šalić ◽  
Ana Jurinjak Tušek ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Deep Eutectic Solvent ◽  
International Standards ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Process Conditions ◽  
Integrated Process ◽  
Free Glycerol ◽  
Mass Ratio ◽  
Glycerol Content

In this research, optimization of the integrated biodiesel production process composed of transesterification of edible sunflower oil, catalyzed by commercial lipase, with simultaneous extraction of glycerol from the reaction mixture was performed. Deep eutectic solvents (DESs) were used in this integrated process as the reaction and extraction media. For two systems, choline chloride:glycerol (ChCl:Gly) and choline chloride:ethylene glycol (ChCl:EG), respectively, the optimal water content, mass ratio of the phase containing the mixture of reactants (oil and methanol) with an enzyme and a DES phase (mass ratio of phases), and the molar ratio of deep eutectic solvent constituents were determined using response surface methodology (RSM). Experiments performed with ChCl:Gly resulted in a higher biodiesel yield and higher glycerol extraction efficiency, namely, a mass ratio of phases of 1:1, a mass fraction of water of 6.6%, and a molar ratio of the ChCl:Gly of 1:3.5 were determined to be the optimal process conditions. When the reaction was performed in a batch reactor under the optimal conditions, the process resulted in a 43.54 ± 0.2% yield and 99.54 ± 0.19% glycerol extraction efficiency (t = 2 h). Unfortunately, the free glycerol content was higher than the one defined by international standards (wG > 0.02%); therefore, the process was performed in a microsystem to enhance the mass transfer. Gaining the same yield and free glycerol content below the standards (wG = 0.0019 ± 0.003%), the microsystem proved to be a good direction for future process optimization.

scholarly journals Synthesis, Characterization, and Synergistic Effects of Modified Biochar in Combination with α-Fe2O3 NPs on Biogas Production from Red Algae Pterocladia capillacea

2021 ◽  
Vol 13 (16) ◽  
pp. 9275 ◽  
Author(s):  
Mohamed A. Hassaan ◽  
Ahmed El Nemr ◽  
Marwa R. Elkatory ◽  
Safaa Ragab ◽  
Mohamed A. El-Nemr ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Red Algae ◽  
Biogas Production ◽  
Synergistic Effects ◽  
Fourier Transform Infrared ◽  
Logistic Function ◽  
Gravimetric Analysis ◽  
Waste Biomass ◽  
Biogas Yield ◽  
Modified Biochar

This study is the first work that evaluated the effectiveness of unmodified (SD) and modified biochar with ammonium hydroxide (SD-NH2) derived from sawdust waste biomass as an additive for biogas production from red algae Pterocladia capillacea either individually or in combination with hematite α-Fe2O3 NPs. Brunauer, Emmett, and Teller, Fourier transform infrared, thermal gravimetric analysis, X-ray diffraction, transmission electron microscopy, Raman, and a particle size analyzer were used to characterize the generated biochars and the synthesized α-Fe2O3. Fourier transform infrared (FTIR) measurements confirmed the formation of amino groups on the modified biochar surface. The kinetic research demonstrated that both the modified Gompertz and logistic function models fit the experimental data satisfactorily except for 150 SD-NH2 alone or in combination with α-Fe2O3 at a concentration of 10 mg/L. The data suggested that adding unmodified biochar at doses of 50 and 100 mg significantly increased biogas yield compared to untreated algae. The maximum biogas generation (219 mL/g VS) was obtained when 100 mg of unmodified biochar was mixed with 10 mg of α-Fe2O3 in the inoculum.

Preparation of solid acid catalysts from waste biomass and their application for microwave-assisted biodiesel production from waste palm oil

2018 ◽  
Vol 36 (8) ◽  
pp. 719-728 ◽  
Author(s):  
Indika Thushari ◽  
Sandhya Babel
Keyword(s):  
Palm Oil ◽  
Photoelectron Spectroscopy ◽  
Solid Acid ◽  
Waste Utilization ◽  
Biodiesel Production ◽  
Solid Acid Catalysts ◽  
Molar Ratio ◽  
Acid Catalysts ◽  
Waste Biomass ◽  
Microwave Assisted

Waste utilization is essential and challenging. Utilization of wastes gives environmental, economic, and social benefits. In this study, inexpensive, sulfonated solid acid catalysts were successfully prepared from palm empty fruit bunch (PEFB), coconut meal residue (CMR), and coconut coir husk (CH) waste by a simple protocol. It was found that prepared PEFB–BCS–SO3H, CMR–BCS–SO3H, and CH–BCS–SO3H catalysts have 4.79, 3.75, and 2.80 mmol g-1 acid density and 739.0, 89.77, and 61.49 m2 g-1 surface areas, respectively. Further, the presence of active functional groups on the surface of the catalysts was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Thermal stability of the catalysts was found below 150°C. Results show that biodiesel yield increases with increasing reaction time and methanol loading, when using microwave heating for biodiesel production from waste palm oil (WPO) and prepared catalysts. A maximum biodiesel yield of 95.5% was obtained by PEFB–BCS–SO3H in 60 minutes using 20:1 methanol:oil (molar ratio) at 70°C. CMR–BCS–SO3H and CH–BCS–SO3H obtained 88.7 and 88.5% biodiesel yields in 60 minutes, using 20:1 and 16:1 methanol:oil (molar ratio), at 70 and 110°C, respectively. Even though, the activity of the catalysts decreased during reuse, these are still of interest as the waste biomass of PEFB, CMR, and CH can be used for catalyst preparation and microwave-assisted biodiesel production from WPO.

scholarly journals Anaerobic Digestion of Corn Stover for Improved Biomethane Yield: Effect of Organic Nitrogen Sources (Soybean Curd Residue and Fish Waste)

2021 ◽  
pp. 22-33
Author(s):  
C. C. Opurum ◽  
F. J. C. Odibo
Keyword(s):  
Anaerobic Digestion ◽  
Corn Stover ◽  
Organic Nitrogen ◽  
Biogas Production ◽  
Nitrogen Sources ◽  
Fish Waste ◽  
Biogas Yield ◽  
Soybean Curd ◽  
Significant Difference ◽  
Soybean Curd Residue

The present study investigated the effect of organic nitrogen sources, soybean curd residue (SCR), and fish meal (FW) on the anaerobic digestion of corn stover for biomethane production. The bioreactors were seeded with the corn stover (corn cob and corn sheath), soybean curd residue (SCR), and fish waste (FW) at different combinations: (CC/SCR), (CC/FW), (CS/SCR) and (CS/FW), including CC and CS alone. The fermentation was for 31 days under mesophilic conditions. Characteristics of the substrates indicate that CC and CS are good carbon and energy sources, but low in nitrogen content. Conversely, SCR and FW are rich nitrogen sources, with low organic carbon content. There was a remarkable increase in biogas production in all treatments, except CC/SCR 75:25 and CC/SCR 85:15 in which inhibitory effect was observed.  The highest percentage increase (138%) in biogas was recorded in CS/SCR 85:15 (2.86 dm3), and the least was CC/FW 75:25 with 1.49 dm3 (24.18% increase). Significant difference (P ≤ 0.05) in biogas yield was in the following: CC/SCR 50:50, CC/FW 50:50, CS/SCR 85:15, CS/FW 50:50, and CS/FW 75:25. The composition of the biogas revealed that the treatment improved biogas production as well as biomethane content, the highest being 69.44% in CS/SCR 85:15. Regression analysis of cumulative biogas yield as a function of time (t) in the different treatments that had a significant difference in biogas yield showed a good correlation between biogas yield (GY) and time (t). Improving the biodegradability of lignocellulosic wastes could lead to a boost in the development of anaerobic digestion and biogas production technology. To improve their biodegradability during anaerobic digestion, both pre-treatments and supplementation have vital roles to play.

scholarly journals Original Research Article Biogas Yield from Anaerobic Batch Co-Digestion of Rice Husk and Zebu Dung

2013 ◽  
Vol 46 (4) ◽  
pp. 118-122
Author(s):  
Ondrej Cundr ◽  
Dagmar Haladova
Keyword(s):  
Rice Husk ◽  
Biogas Production ◽  
Lignin Content ◽  
Methane Yield ◽  
Original Research ◽  
Waste Biomass ◽  
Energy Potential ◽  
Total Solids ◽  
Biogas Yield ◽  
Single Substrate

Abstract The main objective of this work was to test the suitability of rice husk waste biomass for anaerobic digestion and to examine the energy potential of the co-digestion of rice husk with zebu dung. Rice husk and zebu dung were studied under batch anaerobic conditions as separate wastes as well as mixed in various proportions. All experiments were carried out at 5% of total solids. The methane yield achieved by single substrate digestion of rice husk and zebu dung was 13.9 l and 44.58 l CH4/kg volatile solids (VS), respectively. The co-digestion of 50% total solids (TS) rice straw with 50% total solids zebu dung gave the result of 38.42 l CH4/kg VS. According to these results, the degradation and methane production potential of rice husk were not sufficient and it was found that this residue material is less suitable for single substrate digestion without additional pretreatment than for co-digestion. Even if co-digestion of rice husk with zebu dung improved the digestibility of rice husk and hence increased the biogas production, the methane yield was lower in comparison with the result for zebu dung, due to the high lignin content in rice husk. Nevertheless, the proof of digestibility of rice husk showed the possibility of rational exploitation of this waste material.

scholarly journals Modeling the biodiesel production using the wheat straw ash as a catalyst

2021 ◽  
Vol 75 (5) ◽  
pp. 257-276
Author(s):  
Ana Velickovic ◽  
Jelena Avramovic ◽  
Milan Kostic ◽  
Jugoslav Krstic ◽  
Olivera Stamenkovic ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Sunflower Oil ◽  
Methyl Esters ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Optimum Process ◽  
Process Conditions ◽  
X Ray ◽  
Straw Ash

Wheat straw ash (WSA) was investigated as a new catalyst in biodiesel production from sunflower oil. The catalyst was characterized by temperature-programmed decomposition, X- ray powder diffraction, Hg porosimetry, N2 physisorption, and scanning electron microscopy - energy dispersive X-ray spectroscopy methods. The methanolysis reaction was tested in the temperature range of 55?65?C, the catalyst loading range 10?20 % of the oil weight, and the methanol-to-oil molar ratio range 18 : 1?24 : 1. The reaction conditions of the sunflower oil methanolysis over WSA were optimized by using the response surface methodology in combination with the historical experimental design. The optimum process conditions ensuring the highest fatty acid methyl esters (FAME) content of 98.6 % were the reaction temperature of 60.3?C, the catalyst loading of 11.6 % (based on the oil weight), the methanol-to-oil molar ratio of 18.3 :1, and the reaction time of 124 min. The values of the statistical criteria, such as coefficients of determination (R2 = 0.811, R2 = 0.789, R2 = 0.761) and the mean relative percent deviation (MRPD) value of 10.6 % (66 data) implied the acceptability and precision of the developed model. The FAME content after 4 h of reaction under the optimal conditions decreased to 37, 12, and 3 %, after the first, second, and third reuse, respectively.

scholarly journals Recent Updates on the Use of Agro-Food Waste for Biogas Production

2019 ◽  
Vol 9 (6) ◽  
pp. 1217 ◽  
Author(s):  
Marisa Caruso ◽  
Ada Braghieri ◽  
Angela Capece ◽  
Fabio Napolitano ◽  
Patrizia Romano ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Food Waste ◽  
Agricultural Sector ◽  
Genetic Manipulation ◽  
Biogas Production ◽  
Anaerobic Bacteria ◽  
Operating Conditions ◽  
Process Conditions ◽  
The European Union ◽  
Biogas Yield

The production of biogas from anaerobic digestion (AD) of residual agro-food biomasses represents an opportunity for alternative production of energy from renewable sources, according to the European Union legislation on renewable energy. This review provides an overview of the various aspects involved in this process with a focus on the best process conditions to be used for AD-based biogas production from residual agro-food biomasses. After a schematic description of the AD phases, the biogas plants with advanced technologies were described, pointing out the strengths and the weaknesses of the different digester technologies and indicating the main parameters and operating conditions to be monitored. Subsequently, a brief analysis of the factors affecting methane yield from manure AD was conducted and the AD of fruit and vegetables waste was examined. Particular attention was given to studies on co-digestion and pre-treatments as strategies to improve biogas yield. Finally, the selection of specific microorganisms and the genetic manipulation of anaerobic bacteria to speed up the AD process was illustrated. The open challenges concern the achievement of the highest renewable energy yields reusing agro-food waste with the lowest environmental impact and an increment of competitiveness of the agricultural sector in the perspective of a circular economy.

PRODUCTION OF ENVIRONMENTALLY FRIENDLY BIODIESEL BY ENZYMATIC OIL TRANSESTERIFICATION / NEŽALINGO APLINKAI BIODYZELINO GAMYBOS FERMENTINIO ALIEJAUS PERESTERINIMO BŪDU OPTIMIZAVIMO TYRIMAS / ПОЛУЧЕНИЕ ЭКОЛОГИЧНОГО БИОДИЗЕЛЯ ПУТЕМ ФЕРМЕНТАТИВНОЙ ПЕРЕЭТЕРИФИКАЦИИ МАСЛА

2011 ◽  
Vol 19 (2) ◽  
pp. 123-129 ◽  
Author(s):  
Vida Bendikienė ◽  
Vita Kiriliauskaitė ◽  
Benediktas Juodka
Keyword(s):  
Rapeseed Oil ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Process Conditions ◽  
Lipolytic Enzyme ◽  
Alkyl Esters ◽  
Reaction Conditions ◽  
Oil Hydrolysis ◽  
Optimal Reaction ◽  
Very High

In this study, the ability of commercial lipolytic enzyme Lipoprime 50T to catalyze the biotechnologically and environmentally important processes of rapeseed oil hydrolysis and transesterification were investigated and the optimal process conditions were determined using simple and accurate thin layer chromatographic, titrimetric and computer analysis (Micro image 4.0) methods. Lipoprime 50T lipase-catalyzed transesterification of rapeseed oil with several alcohols for fatty acid alkyl esters (biodiesel) production in n-hexane – a common solvent for lipolytic reactions – and in t-butanol – a novel promising solvent for biodiesel production – was investigated. The effects of molar ratio of substrates, reaction temperature and time on the constitution of the methanolysis reaction mixture were analyzed. Lipoprime 50T lipase-catalyzed rapeseed oil methanolysis in n-hexane was determined to be undesirably slow and inefficient process, whereas the lipolytic potential of the studied enzyme was determined to be very high in t-butanol (no rapeseed oil left after 1.5 h from the beginning of the reaction under determined optimal reaction conditions). Santrauka Tirta komercinio preparato Lipoprime 50T, kuriam būdingas lipolizinis aktyvumas, geba katalizuoti biotechnologiniu ir aplinkos apsaugos požiūriu svarbias rapsų aliejaus peresterinimo bei hidrolizes reakcijas. Optimalios vykdytų procesų salygos nustatytos tiksliu bei paprastu plonasluoksnes chromatografijos, titrimetrijos ir kompiuterines analizes (Micro image 4.0) metodais. Optimizuotas biodyzelino – riebalų rūgščių esterių – gavimo procesas bei įvertinta skirtingų alkoholių įtaka Lipoprime 50T lipazės katalizuojamo rapsų aliejaus peresterinimo efektyvumui dviejuose skirtinguose tirpikliuose – n-heksane (įprastinis lipolizes reakcijų tirpiklis) bei tret-butanolyje (naujas perspektyvus tirpiklis biodyzelino sintezės reakcijoms vykdyti). Ištirta molinio substratų santykio, reakcijos temperatūros bei trukmės įtaka rapsų aliejaus metanolizės veiksmingumui tret-butanolyje. Nustatyta, kad Lipoprime 50T lipazės katalizuojama rapsų aliejaus metanolizė nheksane yra lėtas ir ilgai trunkantis procesas, o tret-butanolyje tirti procesai yra ypač spartūs ir efektyvūs (visas rapsų aliejus nustatytomis optimaliomis sąlygomis sureaguoja per apytikriai 1,5 val.). Резюме Была исследована способность коммерческого препарата Lipoprime 50T, обладающего липолитической активностью, катализировать биотехнологически и экологически важные процессы гидролиза и переэтерификации рапсового масла с определением оптимальных для них условий доступным и точным методом тонкослойной хроматографии, титрованием свободных жирных кислот и методом компьютерного анализа данных с помощью программы Micro image 4.0. Получение биодизеля – эфиров жирных кислот – путем переэтерификации рапсового масла некоторыми спиртами было исследовано в обычном для липолитических реакций растворителе н-гексане и в более приемлемом для синтеза биодизеля растворителе трет-бутиловом спирте (т-бутаноле). Также было исследовано влияние молярного соотношения субстратов, температуры и времени на состав продуктов в реакционной смеси. Процесс метанолиза рапсового масла, катализируемый липазой Lipoprime 50T, оказался медленным и малоэффективным в н-гексане, тогда как в т-бутаноле потенциал липолитической активности ферментного препарата был высок (в оптимальных условиях спустя полтора часа от начала процесса в реакционной смеси не оставалось исходного рапсового масла).

Potential of Palm Oil Empty Fruit Bunch as Biogas Substrate

2019 ◽  
Vol 2 (1) ◽  
pp. 59-64
Author(s):  
Vincentius Vincentius ◽  
Evita H. Legowo ◽  
Irvan S. Kartawiria
Keyword(s):  
Palm Oil ◽  
Fermentation Process ◽  
Biogas Production ◽  
Wastewater Sludge ◽  
Empty Fruit Bunch ◽  
Alternative Source ◽  
The Earth ◽  
The One ◽  
Wet Fermentation ◽  
Water Ratio

Natural gas is a source of energy that comes from the earth which is depleting every day, an alternative source of energy is needed and one of the sources comes from biogas. There is an abundance of empty fruit bunch (EFB) that comes from palm oil plantation that can become a substrate for biogas production. A methodology of fermentation based on Verein Deutscher Ingenieure was used to utilize EFB as a substrate to produce biogas using biogas sludge and wastewater sludge as inoculum in wet fermentation process under mesophilic condition. Another optimization was done by adding a different water ratio to the inoculum mixture. In 20 days, an average of 6gr from 150gr of total EFB used in each sample was consumed by the microbes. The best result from 20 days of experiment with both biogas sludge and wastewater sludge as inoculum were the one added with 150gr of water that produced 2910ml and 2185ml of gas respectively. The highest CH 4 produced achieved from biogas sludge and wastewater sludge with an addition of 150gr of water to the inoculum were 27% and 22% CH 4 respectively. This shows that biogas sludge is better in term of volume of gas that is produced and CH percentage.

Mango (Magnifera indica) seed oil grown in Dilla town as potential raw material for biodiesel production using NaOH- a homogeneous catalyst

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Diesel Engine ◽  
Physicochemical Properties ◽  
Seed Oil ◽  
Methyl Esters ◽  
Pollution Prevention ◽  
Raw Material ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Homogeneous Catalyst ◽  
Minimal Amount

Biodiesel produced by transesterification process from vegetable oils or animal fats is viewed as a promising renewable energy source. Now a day’s diminishing of petroleum reserves in the ground and increasing environmental pollution prevention and regulations have made searching for renewable oxygenated energy sources from biomasses. Biodiesel is non-toxic, renewable, biodegradable, environmentally benign, energy efficient and diesel substituent fuel used in diesel engine which contributes minimal amount of global warming gases such as CO, CO2, SO2, NOX, unburned hydrocarbons, and particulate matters. The chemical composition of the biodiesel was examined by help of GC-MS and five fatty acid methyl esters such as methyl palmitate, methyl stearate, methyl oleate, methyl linoleate and methyl linoleneate were identified. The variables that affect the amount of biodiesel such as methanol/oil molar ratio, mass weight of catalyst and temperature were studied. In addition to this the physicochemical properties of the biodiesel such as (density, kinematic viscosity, iodine value high heating value, flash point, acidic value, saponification value, carbon residue, peroxide value and ester content) were determined and its corresponding values were 87 Kg/m3, 5.63 Mm2/s, 39.56 g I/100g oil, 42.22 MJ/Kg, 132oC, 0.12 mgKOH/g, 209.72 mgKOH/g, 0.04%wt, 12.63 meq/kg, and 92.67 wt% respectively. The results of the present study showed that all physicochemical properties lie within the ASTM and EN biodiesel standards. Therefore, mango seed oil methyl ester could be used as an alternative to diesel engine.

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