scholarly journals Co-digestion of Pretreated Chicken – Goat and Untreated Cow Manure at Different Substrate to Inoculums Ratios and Total Solids for Biogas Production

2020 ◽  
Vol 3 (3) ◽  
pp. 11-21
Author(s):  
Clinton Waswa ◽  
Peter Kabok ◽  
Daudi Nyaanga
Keyword(s):  
Constant Temperature ◽  
Biogas Production ◽  
Total Solid ◽  
Particle Sizes ◽  
Cow Manure ◽  
Production Rates ◽  
Total Solids ◽  
Free Range ◽  
Effective Particle ◽  
Substrate To Inoculum Ratio

Biogas production can be greatly affected by inoculum addition and total solids. The effect of the substrate to inoculum ratios and total solids of chicken, goat and cow manure on biogas production was studied using a 0.15m3 laboratory-scale batch digester at a constant temperature of 35°C. Feedstocks were mechanically minced to 3 mm effective particle sizes prior to co-digesting with untreated cow manure from a free-range dairy rearing system. Different amounts of cow substrate inoculum were used at ratios of 2:1, 3:1, 4:1, 5:1 and 6:1, while total solid levels between (7.5% and 10.5%) at intervals of 0.5% were used to study their effects on biogas production. Increasing inoculums and total solids resulted in increased biogas production with peaks at a substrate to inoculum ratio of 4:1 (20% inoculum addition) and 9% total solids. Biogas production rates of 0.61 and 0.63m3/m3d were realized respectively. Keywords: Biogas Production, Chicken-Goat-Cow Manure, Substrate to Inoculum Ratios, Total Solids

scholarly journals Utilization of Aquatic Weed Salvinia molesta as a Raw Material for Biogas Production

2019 ◽  
Vol 22 (2) ◽  
pp. 209-217
Author(s):  
Mujizat Kawaroe ◽  
Hefni Effendi ◽  
Zidni Ilma Palupi ◽  
Neneng Sri Hendra ◽  
Dea Fauzia Lestari
Keyword(s):  
Alternative Energy ◽  
Biogas Production ◽  
C:N Ratio ◽  
Total Solid ◽  
Suspended Solid ◽  
Aquatic Weed ◽  
Volatile Suspended Solid ◽  
Cow Manure ◽  
Total Volatile ◽  
Salvinia Molesta

Salvinia molesta is an aquatic weed having very high growth rate. The high abundance of this species biomass could be utilized as a source of alternative energy. This research was aimed to utilize S. molesta as a substrate for biogas production using batch system in order to reduce euthrofication effect in a lake. Cow manure was used as starter for anaerobic process because containing bacteria. Proximate test was conducted to analyze the chemical characteristics of the aquatic weed. Chemical oxygen demand, total solid, and total volatile suspended solid of weed and manure were analyzed according to the APHA 2012 method. Biogas composition was analyzed with gas chromatography. The results showed that the S. molesta contained high lignin content and low C:N ratio. Hydrolisis and acidification process occured very rapid, resulting in an increase of the weed and manure mixture COD. In the other hand, the decreased of COD removal was caused by the massal death of methanogenesis bacteria. The total solid and total volatile suspended solid content were not significantly decreased. Potential biogas production from S. molesta was 58.16 L.kg-1 with 318.29 mL.gram VS-1day-1 of methane production. This production value was still low or compared to that of cow manure which have been established as biogass materials and need modification to improve the biogas production.

scholarly journals Quantitative and qualitative variations of effective parameters on biogas produced from mixed wastes in anaerobic digester: Bench scale

2021 ◽  
Author(s):  
Abdoliman Amouei ◽  
Ali Darvish Sasi ◽  
Aliakbar Amooey
Keyword(s):  
Biogas Production ◽  
Maximum Yield ◽  
Total Solid ◽  
Cow Dung ◽  
Cow Manure ◽  
Mixing Ratio ◽  
Effective Parameters ◽  
Operational Parameters ◽  
Weight Percentage ◽  
Bench Scale

Abstract Today, biogas production from municipal solid waste as one of the most important sources of energy supply in the world is increasing. In this study, the potential of biogas production from a mixture of cow dung and catering waste was investigated using a continuous flow anaerobic bioreactor with 60 litres at the Bench scale. Operational parameters such as pH, Carbon to Nitrogen ratio (C/N), mixing ratio of restaurant and cow waste in weight percentage (0:100, 50:50, 70:30, and 100:0), total solids (TS) (%5, %10 and %20), temperatures (35, 45 and 55°C) and oxidation-reduction potential (ORP) were evaluated. The results showed that the maximum yield and percent of the biogas produced from cow manure digestion separately was 1003 ml/day and %52.82. Digestion of the catering waste and cow manure as a mixture showed the best mixing ratio, total solid and temperature is 70:30 (w/w), %20 and 55°C respectively and biogas production yield and percent in this conditions was obtained 5430 ml/day and %74.4 respectively. The ORP obtained in this study is -327 millivolt (mv), which indicates the appropriate conditions of the anaerobic process in biogas production and confirmation of methanogenesis.

scholarly journals Impact of Date Palm Seed Size on Biogas Production from Date Seeds/Wastewater Treatment Sludge Mixtures

2016 ◽  
Vol 13 (1) ◽  
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Seed Size ◽  
Date Palm ◽  
Biogas Production ◽  
Experimental Results ◽  
Production Rates ◽  
Total Solids ◽  
Date Seed ◽  
Mesophilic Conditions

Biogas in the form of methane can be produced from wastewater treatment sludge mixed with a variety of biodegradable organic feedstocks through anaerobic digestion. In this study, biogas was produced from date palm seeds, which are locally available, and wastewater treatment sludge mixtures. The objective of the study was to assess the effect of date palm seed additives with different sizes on biogas production from the mixtures. In the study, two locally available types of date seeds, Khalas and Khudari, were anaerobically co-digested with wastewater treatment sludge in 50 mL serum bottles under mesophilic conditions. Date seeds with three different sizes; 1.18– 3.75 mm, 0.6 –1.18 mm; and 0.425 – 0.6 mm, were added to the sludge at date seeds to sludge total solids (TS) weight ratios of 0%, 2.5%, 5%, 7.5%, and 10%. The experimental results confirmed that the addition of date seeds significantly enhanced biogas production up to 20% to 30%. The results indicated that the date seed size slightly affected biogas production, with the order of cumulative biogas production and biogas production rates, expressed in terms of date seed sizes, being as follows: 0.425 – 0.6 mm > 0.6 – 1.18 mm > 1.18 – 3.75 mm. However, the results showed no major difference in biogas production between the two different date seed types.

Effects of Alkali Pre-treatment, Total Solid Content, Substrate to Inoculum Ratio, and pH on Biogas Production from Anaerobic Digestion of Mango Leaves

2018 ◽  
Vol 11 (3) ◽  
pp. 887-897 ◽  
Author(s):  
Zaidun Naji Abudi ◽  
Zhiquan Hu ◽  
Alkhafaji R. Abood ◽  
Dongqi Liu ◽  
Aiping Gao
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Total Solid ◽  
Solid Content ◽  
Total Solid Content ◽  
Substrate To Inoculum Ratio ◽  
Pre Treatment ◽  
Mango Leaves

scholarly journals Effect of Mixing Regimes on Cow Manure Digestion in Impeller Mixed, Unmixed and Chinese Dome Digesters

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2540
Author(s):  
Abiodun O. Jegede ◽  
Grietje Zeeman ◽  
Harry Bruning
Keyword(s):  
Urban Areas ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Gas Production ◽  
Cow Manure ◽  
Volatile Solid ◽  
Treatment Efficiency ◽  
Ambient Temperatures ◽  
Ch4 Production ◽  
Mixing Regime

This study examines the effect of mixing on the performance of anaerobic digestion of cow manure in Chinese dome digesters (CDDs) at ambient temperatures (27–32 °C) in comparison with impeller mixed digesters (STRs) and unmixed digesters (UMDs) at the laboratory scale. The CDD is a type of household digester used in rural and pre-urban areas of developing countries for cooking. They are mixed by hydraulic variation during gas production and gas use. Six digesters (two of each type) were operated at two different influent total solids (TS) concentration, at a hydraulic retention time (HRT) of 30 days for 319 days. The STRs were mixed at 55 rpm, 10 min/hour; the unmixed digesters were not mixed, and the Chinese dome digesters were mixed once a day releasing the stored biogas under pressure. The reactors exhibited different specific biogas production and treatment efficiencies at steady state conditions. The STR 1 exhibited the highest methane (CH4) production and treatment efficiency (volatile solid (VS) reduction), followed by STR 2. The CDDs performed better (10% more methane) than the UMDs, but less (approx. 8%) compared to STRs. The mixing regime via hydraulic variation in the CDD was limited despite a higher volumetric biogas rate and therefore requires optimization.

scholarly journals Effect of high-voltage pulsed electric field (HPEF) pretreatment on biogas production rates of hybrid Pennisetum by anaerobic fermentation

2018 ◽  
Vol 5 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Baijuan Wang ◽  
Ting Chen ◽  
Xiangdong Qin ◽  
Qi Wu ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Pulsed Electric Field ◽  
Production Rates ◽  
Hybrid Pennisetum

scholarly journals Influence of manure concentration as inoculum in anaerobic digestion of vinasse

2017 ◽  
Vol 39 (2) ◽  
pp. 173 ◽  
Author(s):  
Carlos Eduardo de Farias Silva ◽  
Ana Karla de Souza Abud
Keyword(s):  
Biological Process ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Microbiological Analysis ◽  
Total Solids ◽  
Major Factors ◽  
Nitrogen Contents ◽  
Subsequent Stabilization ◽  
Microbial Action ◽  
Sugarcane Industry

Vinasse, main residue of the sugarcane industry, has high pollutant content, being subjected to the use in biogas production due to the high content of organic matter non-toxic to microbial action. For a consolidated process, it is necessary to study parameters that influence the process, in which the amount of inoculum is one of the major factors in the biological process of biogas production. This study investigated the influence of the amount of manure as inoculum (0.5 to 5.5%) during the biodigestion process, evaluating variables such as chemical oxygen demand (COD), pH, biogas production, methane concentration, total solids and total phosphorus and nitrogen contents, as well as microbiological analysis in the sludge remaining in the digester. Biodigestion occurred normally, with hydraulic retention time (HRT) of 20 days, with an acidogenic phase, subsequent stabilization of pH and biogas production. The vinasse had COD and total solids reduced during biodigestion by around 67 and 40%, respectively. Biogas production was increased after the fifth day. Among the three studied conditions, there was no significant increase in efficiency of inoculum use and it can be used the lowest amount, 0.5 % (m v-1). 

Electroporation of harvest residues for enhanced biogas production in anaerobic co-digestion with dairy cow manure

2019 ◽  
Vol 274 ◽  
pp. 215-224 ◽  
Author(s):  
Đurđica Kovačić ◽  
Davor Kralik ◽  
Slavko Rupčić ◽  
Daria Jovičić ◽  
Robert Spajić ◽  
...  
Keyword(s):  
Dairy Cow ◽  
Biogas Production ◽  
Cow Manure ◽  
Harvest Residues ◽  
Dairy Cow Manure

Composition of beagle dog milk

1960 ◽  
Vol 199 (4) ◽  
pp. 731-732 ◽  
Author(s):  
Jack R. Luick ◽  
Harold R. Parker ◽  
A. C. Andersen
Keyword(s):  
Statistical Study ◽  
Total Solid ◽  
Fat Content ◽  
Solid Content ◽  
Total Solid Content ◽  
Mean Values ◽  
Total Solids ◽  
Beagle Dog ◽  
The Mean

A statistical study has been made of the composition of the major C-containing compounds taken from beagle dog milk during the 3rd through 5th week of lactation. The mean values are as follows: 26% total solids, 13% fat, 3.3% lactose and 9.8% protein. Total solid content was found to vary with fat content according to the equation: % total solids = 15.6 + 0.85 % fat.

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