scholarly journals Solid Digestate—Physicochemical and Thermal Study

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7224
Author(s):  
Krzysztof Dziedzic ◽  
Bogusława Łapczyńska-Kordon ◽  
Michał Jurczyk ◽  
Marta Arczewska ◽  
Marek Wróbel ◽  
...  
Keyword(s):  
Biogas Production ◽  
Major Elements ◽  
Proximate Analysis ◽  
Ash Content ◽  
Thermal Study ◽  
Apple Pomace ◽  
Corn Silage ◽  
Combustion Processes ◽  
Special Case ◽  
Test Fuel

Biogas production is an important component of sustainable energy management. In addition to energy-rich biogas, this process also generates solid waste in the form of digestate. The management of this stream has been problematic for many years. One promising method of utilizing this fraction seems to be incineration under controlled conditions. This paper presents an analysis of mixtures of different digestates to assess their suitability for incineration. Four digestates based on corn silage CS and apple pomace AP were used as test fuel. The ultimate and proximate analysis showed that this fuel deviates from the standards accepted for pure biomass, but was found in other fuels, especially those treated as waste. This materials can be a valuable source of energy, but combustion needs be undertaken in special units. Moisture content of investigated digestate-type ranges from 11.9–12.2% and ash content ranges from 8.2% to 11.6%. This could lead to ash sintering and slugging problems, which are problematic, especially because it is not designed for such types of fuel boilers. The study showed correlations between the elemental composition and the course of basic combustion processes. The ultimate analysis of all mixtures shows that the shares of major elements looks similar. These results are connected with the thermogravimetric analysis TGA, which shows similar thermal decomposition for all four mixtures. It is valuable information because, in this special case, when we have mixtures of corn silage and apple pomace originated digestates, the changes in the ratio CS:AP will not affect combustion significantly.

scholarly journals Comparative study and experimental analysis of pellets from biomass sawdust and rice husk

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Uche P. Onochie ◽  
S. A. Aliu ◽  
U. Nosegbe ◽  
K. K. Adama
Keyword(s):  
Rice Husk ◽  
Calorific Value ◽  
Volatile Matter ◽  
Proximate Analysis ◽  
Ash Content ◽  
Alternative Source ◽  
Promising Alternative ◽  
A Value ◽  
Combustion Processes ◽  
Ratio Optimization

Sawdust and rice husk are available in abundance and indigenous in Nigeria but have not been exploited because they cannot be used directly in combustion processes due to their loose form unless by pelleting or briquetting. This experimental study assesses the potential of pellets from sawdust (SD) and rice husk (RH). Pallet samples collected from mills were thereafter optimized in ratios (i.e. 90%RH:10%SD, 80%RH:20%SD, 70RH:30SD, 60%RH:40%SD, 50%RH:50%SD, 100%RH and 100%SD) using mixing ratio optimization model. Seven samples were produced using a manual screw press machine and were subsequently categorized in terms of calorific value (CV), proximate and ultimate analyses using the ASTM standards. Results showed that the 100%RH pellets have higher CV of 31,026.3kJ/kg and the 100%SD a value of 26,088.3kJ/kg while the optimized pellets range from 25,867.39kJ/kg to 27,063.60kJ/kg. The CV decreases with increasing ash content of the pellets. It was also observed from the proximate analysis that the 100%RH has low percentages of moisture content, volatile matter and ash content compared to others. The optimized pellets showed that SD has the tendency to reduce the sulfur content in RH; hence, a promising alternative source of energy to the conventional fossil fuel.

Preliminary results of the optimization of biogas production at the biogas station of the national research institute of animal production in Grodziec Sląski – Kostkowice

2015 ◽  
Vol 2 (3) ◽  
pp. 26-31
Author(s):  
K. Węglarzy ◽  
Yu. Shliva ◽  
B. Matros ◽  
G. Sych
Keyword(s):  
Agricultural Production ◽  
Crude Protein ◽  
Biogas Production ◽  
Electric Energy ◽  
Corn Silage ◽  
Industrial Wastes ◽  
Organic Mass ◽  
National Research Institute ◽  
Digestion Process ◽  
By Products

Aim. To optimize the methane digestion process while using different recipes of substrate components of ag- ricultural origin. Methods. The chemical composition of separate components of the substrate of agricultural by-products, industrial wastes, fats of the agrorefi nery and corn silage was studied. Dry (organic) mass, crude protein (fat) fi ber, loose ash, nitrogen-free exhaust were estimated in the components and the productivity of biogas was determined along with the methane content. These data were used as a basis for daily recipes of the substrate and the analysis of biogas production at the biogas station in Kostkowice. Results. The application of by-products of agricultural production solves the problem of their storage on boards and in open containers, which reduces investment costs, related to the installation of units for their storage. Conclusions. The return on investment for obtaining electric energy out of agricultural biogas depends considerably on the kind of the substrate used and on technological and market conditions.

scholarly journals Effect of Different Drying Methods on the Nutritional Value of Hibiscus sabdariffa Calyces as Revealed by NMR Metabolomics

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1675
Author(s):  
Sengnolotha Marak ◽  
Elena Shumilina ◽  
Nutan Kaushik ◽  
Eva Falch ◽  
Alexander Dikiy
Keyword(s):  
Nutritional Value ◽  
2D Nmr ◽  
Proximate Analysis ◽  
Ash Content ◽  
Drying Methods ◽  
Hibiscus Sabdariffa ◽  
Nmr Metabolomics ◽  
Polar Metabolites ◽  
2D Nmr Spectra ◽  
Plant Processing

Red mature calyces of Hibiscus sabdariffa were collected from 16 different locations in Meghalaya, India. Samples were processed using shade drying (SD) and tray drying (TD). NMR spectroscopy was used to assess the metabolic composition of the calyces. In this study, 18 polar metabolites were assigned using 1D and 2D NMR spectra, and 10 of them were quantified. Proximate analysis showed that the TD method is more efficient at reducing moisture and maintaining the ash content of the Hibiscus biomass. NMR metabolomics indicates that the metabolite composition significantly differs between SD and TD samples and is more stable in TD plant processing. The differences in post-harvest drying has a greater impact on the metabolite composition of Hibiscus than the plant location.

scholarly journals Pengaruh Jenis Umbi Gadung (Dioscorea hispidaDennst.) Terhadap Kadar Bioetanol pada Proses Fermentasi Menggunakan Ragi Roti

Jurnal Agrium ◽  
2017 ◽  
Vol 14 (2) ◽  
pp. 45
Author(s):  
Puri Handayani ◽  
Khaidir Khaidir ◽  
Zurrahmi Wirda
Keyword(s):  
Proximate Analysis ◽  
Ash Content ◽  
Average Width ◽  
Ethanol Content ◽  
Initial Ph ◽  
Yeast Concentration ◽  
Tuber Type

The objective of this research is to reveal the influence of the type of gadung to the produced ethanol content, the yeast concentration which is suitable to get the maximum ethanol and to know the interaction between the type of gadung and the yeast concentration on the ethanol content produced. The research using Randomized Complete Design with factorial pattern consisted of 2 factors: the gadung bulb type (U), as the first factor consisting of white gadung tuber (U1) and yellow bulb tuber (U2) second factor yeast concentration consisting of 2 , 5% (R1), 3% (R2), 3.5% (R3). Fermentation duration is done for 3 days. Each treatment is repeated 3 times. The results showed that the proximate analysis on two types of gadung is highest in white gadung. The average width of the highest gadung leaves on white gadung . Test brix on the highest gadung tubers on white gadung. On observation of the highest yield of ethanol occurs on the type of white gadung  and 2.5% yeast concentration. The best type of mass observation occurred in yellow gadung tuber type and 2.5% yeast concentration. Observation of initial pH of ethanol was highest in white gadung and yeast concentration 2.5%. Observation of pH after distillation is highest on white gadung and at yeast concentration 2.5%. The highest concentration of ethanol content on yellow gadung and at yeast consentation 2.5%. The observation of the highest ash content on yellow gadung and at yeast concentration 3.5%.

Assessment of Selected Nutritional and Anti-Nutritional Analysis of Sweet Potato Tubers Collected From Tepi Market, Southwestern Ethiopia

2020 ◽  
Author(s):  
Shisho Haile
Keyword(s):  
Moisture Content ◽  
Sweet Potato ◽  
Acid Content ◽  
Proximate Analysis ◽  
Ash Content ◽  
Fiber Content ◽  
Crude Fiber ◽  
Local Market ◽  
Potato Tubers ◽  
Crude Fiber Content

Abstract Sweet potato is primarily used for nutrition and medicinal purposes. This study was done to determine proximate analysis and anti-nutritional factors of sweet potato tubers. The sample was randomly purchased fromTepi local market. Then it was analyzed for moisture content, ash content, crude fiber content, oxalate content and acid content. The result of the study showed that 87.6% moisture content, 7.5% ash content, 7.46 mg/100 gm oxalate content, 4.3% crude fiber content and 0.09 M acid content.

scholarly journals Evaluation Performance of Pneumatic Dryer for Cassava Starch

REAKTOR ◽  
2019 ◽  
Vol 18 (04) ◽  
pp. 216
Author(s):  
Suherman Suherman ◽  
Nur Hidayati
Keyword(s):  
Energy Efficiency ◽  
Conventional Method ◽  
Energy Analysis ◽  
Proximate Analysis ◽  
Cassava Starch ◽  
Ash Content ◽  
Energy Utilization ◽  
Drying Rate ◽  
The Sun ◽  
Air Flow Rate

In small and medium industries, cassava starch is dried using conventional method by drying it directly under the sun. However, the main drawback of conventional method is low drying rate. Therefore, in this study, cassava starch with a water content of 40% (wet basis) was dried using a pneumatic dryer to a moisture content below 13% (wet basis). The aim of this research is to analyze the influence of drying air temperature, drying air flow rate and rate of feeding in relation to drying rate and energy analysis. Energy analysis was performed to determine the performance of pneumatic dryer. The energy analysis itself is done in the form of energy utilization and energy efficiency. The energy analysis shows that the increase of dryer temperature from 60 to 100oC will increase the utilization of energy from 0.34 to 0.76 J/s, while the energy efficiencies ranged between 30-40%. Proximate analysis shows that the dried cassava starch has an ash content of 0,24, grain fiber of 0,12, and degree of whiteness of 98%, which fulfills the SNI standard of cassava starch.

scholarly journals Acacia Holosericea: An Invasive Species for Bio-char, Bio-oil, and Biogas Production

2019 ◽  
Vol 6 (2) ◽  
pp. 33 ◽  
Author(s):  
Md Sumon Reza ◽  
Ashfaq Ahmed ◽  
Wahyu Caesarendra ◽  
Muhammad S. Abu Bakar ◽  
Shahriar Shams ◽  
...  
Keyword(s):  
Moisture Content ◽  
Heating Rate ◽  
Invasive Plant ◽  
Biogas Production ◽  
Proximate Analysis ◽  
High Hydrogen ◽  
Heating Value ◽  
Brunei Darussalam ◽  
Bio Oil ◽  
Acacia Holosericea

To evaluate the possibilities for biofuel and bioenergy production Acacia Holosericea, which is an invasive plant available in Brunei Darussalam, was investigated. Proximate analysis of Acacia Holosericea shows that the moisture content, volatile matters, fixed carbon, and ash contents were 9.56%, 65.12%, 21.21%, and 3.91%, respectively. Ultimate analysis shows carbon, hydrogen, and nitrogen as 44.03%, 5.67%, and 0.25%, respectively. The thermogravimetric analysis (TGA) results have shown that maximum weight loss occurred for this biomass at 357 °C for pyrolysis and 287 °C for combustion conditions. Low moisture content (<10%), high hydrogen content, and higher heating value (about 18.13 MJ/kg) makes this species a potential biomass. The production of bio-char, bio-oil, and biogas from Acacia Holosericea was found 34.45%, 32.56%, 33.09% for 500 °C with a heating rate 5 °C/min and 25.81%, 37.61%, 36.58% with a heating rate 10 °C/min, respectively, in this research. From Fourier transform infrared (FTIR) spectroscopy it was shown that a strong C–H, C–O, and C=C bond exists in the bio-char of the sample.

scholarly journals Effect of Thermal Pretreatment on the Yield of Biogas from Microcoleous Vaginatus

2021 ◽  
Vol 17 (4) ◽  
pp. 250-256
Author(s):  
M. Haruna ◽  
O.R. Momoh ◽  
S. Bilal
Keyword(s):  
Cell Wall ◽  
Anaerobic Digestion ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Research Work ◽  
Proximate Analysis ◽  
Biogas Yield ◽  
Bacteria Growth ◽  
Positive Effect ◽  
Made In

Biomass is being looked upon as one of the promising renewable energy sources for the future, with growing interest in microalgae conversion into biogas through anaerobic digestion. Recently, the ability of microalgae to treat waste water has doubled its potentials material today. However, in spite of the progress made in that regards, there are still challenges of algae conversion to biofuel, due to the presence of complex cell wall in some algae. Cell wall inhibits bacteria growth during degradation. In this research work 10 grams of Microcoleous vaginatus was treated in an oven at varying temperatures of 70, 75 and 80 oC for an hour, out of which 4 g was measured into 250 ml serum bottle for digestion at mesophilic temperature of 37 oC. Based on the results of proximate analysis, 69%increase in carbohydrate was attained with 72.7 – 148% reduction in moisture content. The biogas yield of untreated sample was 4.36 mLg−1 VS, while, pretreated samples at 70, 75 and 80 ℃ produced 8.39, 9.07 and 9.38 mLg−1VS (volatile solid) of biogas. This  corresponds to 92, 108 and 115% higher than that of untreated samples. However, thermal treatment of M. vaginatus prior to digestion show positive effect on carbohydrate extraction and enhanced biogas and methane yield as well. Therefore, this makes the substrate a good feedstock for biogas production. Keywords: Biomass, pretreatment, thermal, anaerobic digestion, degradation, Microcoleous vaginatus.

scholarly journals Proximate Analysis of Poultry-Mix Formed Feed Using Maize Bran as a Base

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Solagbade Saheed Afolabi ◽  
John Oluwafemi Oyeyode ◽  
Wasswa Shafik ◽  
Zubair. A. Sunusi ◽  
Adegoke Abdullahi Adeyemi
Keyword(s):  
Proximate Analysis ◽  
Ash Content ◽  
Soya Bean ◽  
Substantial Variation ◽  
Total Carbohydrate ◽  
Deep Well ◽  
Three Samples ◽  
Maize Bran ◽  
Nutritional Needs ◽  
Feed Samples

The purpose of this research was to demonstrate the proximate analysis of poultry-mix made using maize bran as a basis. Red beans, soya beans, and benny beans were the three samples utilised in this study. This work investigates the appropriate poultry mix for birds breed for meat and egg. Thirty grammes of proteinous feedstock were weighed and homogeneously combined with 70 grammes of maize bran. The following was revealed in a proximate analysis of the feeds: moisture ranged from 1.18% to 1.54%, unrefined lipids 0.99–3.08%, total carbohydrate 57% to 72%, ash content 38.48% to 38.92%, unrefined protein 18.38% to 22.53% and unrefined fiber 2.0% to 4.65% respectively for broilers and layers. In terms of nutritional concentrations, all feed samples showed a substantial variation. Based on the findings of the study, it can be stated that Soya bean-maize bran is an excellent poultry-mix formulation that has deep well-disposed benefits and meets nearly all nutritional needs for meat and egg-producing birds.

scholarly journals Biochar produced from poultry litter waste

2021 ◽  
Vol 10 (11) ◽  
pp. e351101119704
Author(s):  
Moisés Edevaldo Pereira ◽  
Luciano Donizeti Varanda ◽  
Natália Rodrigues de Carvalho ◽  
Carlos Roberto Sette Jr ◽  
Franciane Andrade de Padua ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Residence Time ◽  
Broiler Chickens ◽  
Poultry Litter ◽  
Proximate Analysis ◽  
Ash Content ◽  
Residence Times ◽  
Heating Value ◽  
Scanning Electron

Brazil generates substantial quantity of poultry litter waste because of its worldwide prominence in the production of broiler chickens. The volume of the poultry litter biomass generates considerable environmental impact. The objective was to characterize the biochar produced from poultry litter residue under different conditions with the aim of determining the best residence time and temperature. Poultry litter was collected after two batches of chicken breeding. Five treatments for biochar production were carried out at a temperature of 450 °C (defined by thermogravimetric analysis - TGA) and residence times of 0.5, 1, 2, 4, and 6h. The biochar produced was assessed using proximate analysis, moisture content, gravimetric yield, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and HHV (higher heating value). The results revealed that the best conditions for biochar production was 450 °C (pyrolysis) and residence time of 0.5h, with 37.21% gravimetric yield. We concluded that the biochar produced in this study is recommended for soil application but was not suitable for energy purposes because of its high ash content (up to 33.66%) and low HHV (18,907 J g-1).

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