scholarly journals Impact of Adding Biopreparations on the Anaerobic Co-Digestion of Sewage Sludge with Grease Trap Waste

2016 ◽  
Vol 22 (3) ◽  
pp. 167-179 ◽  
Author(s):  
Małgorzata Worwąg
Keyword(s):  
Sewage Sludge ◽  
Fermentation Process ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Methyl Esters ◽  
Production Plant ◽  
Similar Relationship ◽  
Methane Fermentation ◽  
Grease Trap Waste ◽  
Mesophilic Conditions

Abstract The aim of the study was to evaluate the effect of using biopreparations on efficiency of the co-fermentation process. Commercial bacterial biopreparations DBC Plus Type L, DBC Plus Type R5 and yeast biopreparations were used in the study. The process of cofermentation of sewage sludge with grease trap waste from a production plant that manufactured methyl esters of fatty acids was analysed in the laboratory environment under mesophilic conditions. The sludge in the reactor was replaced once a day, with hydraulic retention time of 10 days. Grease trap waste accounted for 35%wt. of the fermentation mixture. The stabilization process was monitored everyday based on the measurements of biogas volume. Addition of yeast biopreparation to methane fermentation of sewage sludge with grease trap waste caused an increase in mean daily biogas production from 6.9 dm3 (control mixture) to 9.21dm3 (mixture M3). No differences in biogas production were found for other cases (mixtures M1, M2). A similar relationship was observed for methane content in biogas.

scholarly journals Biogas production in the methane fermentation of excess sludge oxidized with Fenton’s reagent

2019 ◽  
Vol 116 ◽  
pp. 00104
Author(s):  
Iwona Zawieja ◽  
Kinga Brzeska
Keyword(s):  
Fermentation Process ◽  
Biogas Production ◽  
Process Conditions ◽  
Oh Radicals ◽  
Fenton’S Reagent ◽  
Iron Ions ◽  
Fenton Reagent ◽  
Excess Sludge ◽  
Methane Fermentation ◽  
Fenton's Reagent

The advanced oxidation processes (AOPs) play an important role in the degradation of hardly decomposable organic pollutants. AOPs methods rely on the production of highly reactive hydroxyl OH• radicals. The aim of the conducted research was to intensify biogas production in the methane fermentation process of excess sludge subjected to the process of deep oxidation with Fenton's reagent. In the process of oxidation of sewage sludge with the Fenton reagent, doses of iron ions in the range 0.02–0.14 g Fe2+/g TS (total solids) were used Hydrogen peroxide was measured in the proportions 1: 1–1:10 in relation to the mass of iron ions. The basic substrate of the study was excess sludge. In the case of excess sludge oxidation with the use of Fenton's reagent, the most favorable process conditions were considered to be the dose of iron ions 0.08 g Fe2+/g d.m. and a Fe2+: H2O2 ratio of 1:5. As a result of subjecting the excess sludge to disintegration with the Fenton reagent in the above-mentioned dose, with respect to the fermentation process of unprocessed sludge, about two-fold increase in the digestion degree of excess sludge and about 35% increase of the biogas yield was obtained.

scholarly journals The usefulness of sugar beets for biogas production in relations of the storage time and sugar content

2018 ◽  
Vol 44 ◽  
pp. 00114 ◽  
Author(s):  
Natalia Mioduszewska ◽  
Mariusz Adamski ◽  
Anna Smurzyńska ◽  
Jacek Przybył ◽  
Krzysztof Pilarski
Keyword(s):  
Sugar Beet ◽  
Storage Time ◽  
Fermentation Process ◽  
Biogas Production ◽  
Sugar Content ◽  
Storage Period ◽  
Methane Fermentation ◽  
Sugar Beets ◽  
Biogas Yield

The aim of the study was to evaluate the usefulness of sugar beet for biogas production, taking into account the duration time of storage and sugar content in the roots. The research has included analysis of methane and biogas yield of sugar beet. The relations between the sugar content in the roots and the length of storage period and the course of the methane fermentation process were determined. Sugar beets with sugar content of 17.6% and 19.6% were used for this experiment. In order to analyse the fermentation process, the fresh beets and the beets stored in flexible, hermetic tanks in the period of 43 and 89 days were used. Based on the analysis of the obtained results, it was found that the sugar content and the storage time of sugar beet roots can differentiate the production of biomethane and that it influences the methane fermentation process and the quality of the produced biogas.

scholarly journals The influence of mixing inside the fermentation reactors during the study of biogas efficiency of the substrates in mesophilic technology

2018 ◽  
Vol 10 ◽  
pp. 01012
Author(s):  
Kamil Kozlowski ◽  
Marta Cieslik ◽  
Jakub Mazurkiewicz ◽  
Anna Smurzynska ◽  
Michal Brzoski ◽  
...  
Keyword(s):  
Fermentation Process ◽  
Biogas Production ◽  
High Energy ◽  
Current Standard ◽  
Methane Fermentation ◽  
Environmental Friendly ◽  
Maize Straw ◽  
Biogas Plants ◽  
Accredited Laboratory ◽  
Gas Fuel

Along with the development of environmental friendly technologies, an increasing interest in generating the electricity and heat from renewable sources has been observed in Poland. Perfect example of such installations are agricultural biogas plants, where methane fermentation produces high-energy gas fuel i.e. biogas. Before investing, it is necessary to perform a detailed studies of the biogas efficiency of the substrates used. The proper run of fermentation process, as well as the high biogas production related to the operation, depend on many factors, including the mixing inside the reactor. The DIN 38 414-S8 standard, commonly used in the tests, assumes the mixing of the whole eudiometric sets, used in accredited laboratory units, which due to their uniform construction may cause problems. The aim of the study was to determine the effect of laboratory mixing in the fermentation reactor on the biogas efficiency of the maize straw. The experiment tests were performed in the Laboratory of Ecotechnologies, in the Poznan, in accordance with the current standard DIN 38 414-S8.The obtained research results confirmed the effect of mixing inside the fermentation reactors on the biogas efficiency of the maize straw.

scholarly journals Mesophilic and Thermophilic Anaerobic Digestion of Organic Fraction Separated during Mechanical Heat Treatment of Municipal Waste

2020 ◽  
Vol 10 (7) ◽  
pp. 2412
Author(s):  
Slawomir Kasinski
Keyword(s):  
Anaerobic Digestion ◽  
Fermentation Process ◽  
Biogas Production ◽  
Municipal Waste ◽  
Organic Fraction ◽  
Thermophilic Anaerobic Digestion ◽  
Volatile Solids ◽  
Thermophilic Conditions ◽  
Potential Impact ◽  
Mesophilic Conditions

The objective of this study was to investigate the effect of process temperature on semi-continuous anaerobic digestion of the organic fraction separated during autoclaving of municipal waste. Tests were carried out in reactors with full mixing. Biogas production was higher in thermophilic conditions than in mesophilic conditions (0.92 L/g volatile solids at 55 °C vs. 0.42 L/g volatile solids at 37 °C, respectively). The resulting methane yields were 0.25-0.32 L CH4/g VS and 0.56–0.70 L CH4/g VS in mesophilic and thermophilic conditions, respectively. In both variants, the methane share was over 70% v/v. This work also discusses the potential impact of Maillard compounds on the efficiency of the fermentation process, which were probably produced during the process of autoclaving of municipal waste. These results indicate that, after autoclaving, the organic fraction of municipal waste can be an effective substrate for anaerobic digestion in thermophilic conditions.

Performance, Microbial Community Analysis and Fertilizer Value of Anaerobic Co-digestion of Cattle Manure with Waste Kitchen Oil

2019 ◽  
Vol 35 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Ricardo Galbiatti Sandoval Nogueira ◽  
Teng Teeh Lim ◽  
Haoqi Wang ◽  
Paulo Henrique Mazza Rodrigues
Keyword(s):  
Anaerobic Digestion ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Preliminary Test ◽  
Community Analysis ◽  
Cattle Manure ◽  
Microbial Community Analysis ◽  
Fertilizer Value ◽  
Replication Control ◽  
Mesophilic Conditions

Abstract. Co-digestion trials of beef cattle manure and waste kitchen oil (WKO) were conducted to evaluate potential increase of biogas production for a local beef farm anaerobic digester. The trials were conducted using laboratory-scale, semi-continuously loaded digesters under mesophilic conditions, with 21-day hydraulic retention time (HRT). In a preliminary test, WKO was added at 0%, 0.5%, 1.0%, 1.5%, and 2.0% by volume, each with replicate digesters (n=2), except for the 0% level, which had one digester (n=1). Methane (CH4) yield per week increased linearly with WKO levels. Populations of bacteriodetes decreased, while clostridiales and synergistales increased with the WKO levels. A second test was conducted using treatments with more replication: control (n=3), and 1.0% (n=3) and 2% (n=3) WKO levels. Methane yields of the 1.0% and 2.0% WKO levels were 79.1% and 203% higher than the control, respectively. Addition of WKO have resulted in changes of the metagenomics of the digesters. Populations of clostridiales increased, while bacteroidales and euryarchaeota methanomicrobia YC-E6 decreased with the WKO levels. The findings confirm adding low amounts (1% and 2%) of WKO as co-digestion feedstock can be an effective way to increase CH4 yield for beef operation anaerobic digestion, especially when there are available feedstock nearby. Keywords: Anaerobic digestion, Biogas, Methane, Semi-continuous digesters.

scholarly journals Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 150
Author(s):  
Joanna Kazimierowicz ◽  
Izabela Bartkowska ◽  
Maria Walery
Keyword(s):  
Carbon Dioxide ◽  
Sewage Sludge ◽  
Low Temperature ◽  
Chemical Oxygen Demand ◽  
Biogas Production ◽  
Nitrogen Concentration ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Methane Fermentation ◽  
Dissolved Phase

This study aimed to determine the effect of the low-temperature conditioning of excess dairy sewage sludge using solidified carbon dioxide on the efficiency of methane fermentation. An increase in the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio above 0.3 had no significant effect on chemical oxygen demand concentration in the dissolved phase. The highest chemical oxygen demand values, ranging from 490.6 ± 12.9 to 510.5 ± 28.5 mg·dm−3, were determined at solidified carbon dioxide to excess dairy sewage sludge ratio ranging from 0.3 to 0.5. The low-temperature conditioning caused ammonia nitrogen concentration to increase from 155.2 ± 10.2 to 185.9 ± 11.1 mg·dm−3 and orthophosphates concentration to increase from 198.5 ± 23.1 to 300.6 ± 35.9 mg·dm−3 in the dissolved phase. The highest unitary amount of biogas, reaching 630.2 ± 45.5 cm3·g o.d.m.−1, was produced in the variant with the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio of 0.3. Methane content of the biogas produced was at 68.7 ± 1.5%. Increased solidified carbon dioxide dose did not lead to any significant changes in biogas and methane production. The efficiency of biogas production from unconditioned excess dairy sewage sludge was lower by 43.0 ± 3.2%. The analysis demonstrated that the low-temperature conditioning is an energetic viable technology aiding the methane fermentation process.

scholarly journals Potential of biogas production from swine manure supplemented with glycerine waste

2014 ◽  
Vol 34 (5) ◽  
pp. 844-853 ◽  
Author(s):  
Odorico Konrad ◽  
Fabio F. Koch ◽  
Marluce Lumi ◽  
Jaqueline F. Tonetto ◽  
Alberto Bezama
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Swine Manure ◽  
The Other ◽  
Automated System ◽  
Batch System ◽  
Very High ◽  
Mesophilic Conditions

In this study, was studied the biogas generation from swine manure, using residual glycerine supplementation. The biogas production by digestion occurred in the anaerobic batch system under mesophilic conditions (35°C), with a hydraulic retention time of 48 days. The experiment was performed with 48 samples divided into four groups, from these, one was kept as a control (without glycerin) and the other three groups were respectively supplemented with residual glycerine in the percentage of 3%, 6% and 9% of the total volume of the samples. The volume of biogas was controlled by an automated system for reading in laboratory scale and the quality of the biogas (CH4) measured from a specific sensor. The results showed that the residual glycerine has high potential for biogas production, with increases of 124.95%, 156.98% and 197.83% in the groups 3%, 6% and 9%, respectively, relative to the sample control. However, very high organic loads can compromise the process of digestion affecting the quality of the biogas generated in relation to methane.

Determination of the optimal rate for the microaerobic treatment of several H2S concentrations in biogas from sludge digesters

2011 ◽  
Vol 64 (1) ◽  
pp. 233-238 ◽  
Author(s):  
I. Díaz ◽  
A. C. Lopes ◽  
S. I. Pérez ◽  
M. Fdz-Polanco
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Working Volume ◽  
Pilot Plant Scale ◽  
O2 Supply ◽  
Microaerobic Conditions ◽  
Mesophilic Conditions

The treatment of H2S in the biogas produced during anaerobic digestion has to be carried out to ensure the efficient long-lasting use of its energetic potential. The microaerobic removal of H2S was studied to determine the treatment capacity at low and high H2S concentrations in the biogas (0.33 and 3.38% v/v) and to determine the optimal O2 rate that achieved a concentration of H2S of 150 mg/Nm3 or lower. Research was performed in pilot-plant scale digesters of sewage sludge, with 200 L of working volume, in mesophilic conditions with a hydraulic retention time of 20 d. O2 was supplied at different rates to the headspace of the digester to create the microaerobic conditions. The treatment successfully removed H2S from the biogas with efficacies of 97% for the low concentration and 99% for the highest, in both cases achieving a concentration below 150 mg/Nm3. An optimal O2 rate of 6.4 NLO2/Nm3 of biogas when treating the biogas was found with 0.33% (v/v) of H2S and 118 NLO2/Nm3 of biogas for the 3.38% (v/v) concentration. This relation may be employed to control the H2S content in the biogas while optimising the O2 supply.

Degradation of PCBs in sewage sludge during methane fermentation process concerning environmental management

2014 ◽  
Vol 57 (3) ◽  
pp. 1163-1175 ◽  
Author(s):  
Bartłomiej Macherzyński ◽  
Maria Włodarczyk-Makuła ◽  
Beata Skowron-Grabowska ◽  
Marta Starostka-Patyk
Keyword(s):  
Environmental Management ◽  
Sewage Sludge ◽  
Fermentation Process ◽  
Methane Fermentation

scholarly journals EFFICIENCY OF ANAEROBIC DECOMPOSITION OF MANURE FROM CATTLE FED WITH SIDA HERMAPHRODITA SILAGE

2018 ◽  
Author(s):  
Magda DUDEK ◽  
Marcin ZIELIŃSKI ◽  
Paulina RUSANOWSKA ◽  
Marcin DĘBOWSKI ◽  
Cezary, PURWIN, ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Biogas Production ◽  
Cattle Manure ◽  
Methane Fermentation ◽  
Anaerobic Decomposition ◽  
Second Stage ◽  
Series Of Experiments ◽  
Stage 1 ◽  
Two Stages ◽  
Mesophilic Conditions

The study aimed to determine the influence of addition of Sida hermaphrodita silage into cattle forage on efficiency of methane fermentation of cattle manure. Efficiency of methane fermentation connected with amount and composition of produced biogas was determined with respirometric tests. Methane fermentation was performed in mesophilic conditions with initial organic compounds loading of 5 g VS/(dm3∙d). The study was divided into two stages. In first stage, substrate in methane fermentation was only cattle manure. In second stage, substrate in methane fermentation was cattle manure and Sida silage. There were three series of experiments in each stage, due to cattle manure was obtained from cattle fed with forage differ in contribution of Sida silage (0 – series 1, 17% - series 2, 34% - series 3). In the stage 1, biogas production of 223±15 L/kg VS, 247±8.5 L/kg VS and 231±18 L/kg VS was noted in the series 1, 2, and 3, respectively. The addition of Sida silage to the cattle forage had no impact on biogas potential of cattle manure. In the stage 2, the same tendency was observed. No differences in biogas composition between series were also observed. Methane content in biogas was about 60%.

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