Estudo qualiquantitativo do biogás produzido por substratos em biodigestores tipo batelada

Galbiatti, João Antônio; Caramelo, Anaira Denise; Silva, Flavia G.; Gerardi, Eliana A. B.; Chiconato, Denise Aparecida

doi:10.1590/s1415-43662010000400013

Cited by 20 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The average daily production of methane for the MAN-SEP and MAN-DEC digesters are similar and intensify from approximately 30 days of the beginning of the experiment reducing its production after approximately 80 days. The methane production for the SOL-RET biodigester presents a peak at 70 days of the experiment and intensifies after 130 days, which justifies the low accumulated biogas production in the previous period.The presence of only one methane peak at the beginning of the experiment for the MAN-SEP and MAN-DEC biodigesters indicates that there was separation of a more difficult biodegradation material and this is explicit by the presence of methane peak production in the end of the experiment by the SOL-RET biodigester, constituted with the separated solids.The highest methane content present in the biogas was 92.1% for the MAN-SEP biodigester and the lowest was 82.3% for the MAN-INN biodigester, which were higher than those found by GALBIATTI et al (2010) that worked, among other substrates, with bovine manure and the highest average methane content was 81.48%. Table 2 shows the biogas production potential values expressed in m 3 of biogas per kg of manure, per kg of total solids added, per kg of volatile solids added and per kg of reduced volatile solids.…”

Section: Figure 3 Accumulated Production Of Biogas (%) In Batch Digementioning

confidence: 56%

Biogas Production in Dairy Cattle Systems, Using Batch Digesters With and Without Solids Separation in the Substrates

et al. 2017

View full text Add to dashboard Cite

This research aimed to evaluate the biogas production during the anaerobic biodigestion process of dairy cattle manure, with and without solids separation. Sixteen biodigesters of the batch type were used, each one with 2L of capacity, supplied with manure in four different conditions: (1) pure manure, after washing the floors of the free stall system; (2) manure after the solids separator; (3) manure after the solids separator and sand decanter and (4) manure with the solid retained in separator solids, dissolved in water. The hydraulic retention time was of 196 days. The highest reductions of volatile solids (VS) were obtained for the biodigesters supplied with manure that went through some process of solids separation. The highest potential of methane production(CH4) obtained was of 0.2686 m³ CH4 kg -1 of added VS, supplied to digesters with manure after solids separator. The best potential for biogas and methane production was observed when there was a reduction of the solids concentration in the manure and, in this case, the hydraulic retention time can be reduced, which reduces the volume of the biodigester and the cost of implementation and maintenance, but the highest biogas production occurred in the biodigesters without solids separation.

show abstract

Section: Figure 3 Accumulated Production Of Biogas (%) In Batch Digementioning

confidence: 56%

Biogas Production in Dairy Cattle Systems, Using Batch Digesters With and Without Solids Separation in the Substrates

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The effect of fibrous substances on the anaerobic biodigestion process can be confirmed in a study carried out by Galbiatti et al (2010). These authors found that codigestion between 50% of cattle manure and 50% of sugarcane bagasse resulted in a 31% reduction in the accumulated biogas production after 120 days of anaerobic biodigestion.…”

Section: Biogas Production and Energy Potentialmentioning

confidence: 70%

Use of Inoculum in Biodigesters With Cattle Manure Under Conventional and Organic Production Systems

et al. 2020

View full text Add to dashboard Cite

One way of making livestock farming a more sustainable practice is to raise cattle organically. However, regardless of the production system, there is a generation of residues that can be converted into energy resources using biodigesters. This study aimed to evaluate the addition of inoculum in the anaerobic biodigestion of cattle manure under organic (OPS) and conventional production systems (CPS) in an Indian model biodigester. The physicochemical (pH, EC, TS, VS, DBO, and COD) and microbiological characteristics of the affluent and effluent, as well as the production, potential, and qualitative characteristics of the biogas, were evaluated. CPS showed higher reductions in TS, VS, BOD, and COD than OPS, with the highest effect of biogas production. Regarding the effect of inoculum addition, the treatment with 20% inoculum provided in both production systems high acceleration at the starting point of biogas production and increased energy potential, as well as high reductions in VS, BOD, and COD. Thus, there is a need to use 20% inoculum for high biogas productivity, regardless of the production system.

show abstract

“…The maximum biogas production results for the treatment with no EM addition and for ones with the highest concentrations of inoculum was not in accordance to the literature. Galbiatti et al (2010) obtained 900.4 m 3 of biogas at the end of the digestion of 70 liters substrate prepared from cattle manure diluted in water. In such case, the accumulated production can be considered of 12.86 liters of biogas per each liter of substrate put Table 4.…”

Section: Resultsmentioning

confidence: 99%

Effective Microorganisms (Em) as Biofeeders for Anaerobic Digestion

Ferreira¹,

Gates²,

Batista³

et al. 2017

Reveng

View full text Add to dashboard Cite

Soil micro-organisms called Effective Microorganisms (EM) were first cultivated and used in the 1970s. Researches about these cultures have since then demonstrated their effectiveness in improving soil characteristics and as an alternative for accelerating organic matter decomposition in waste treatment systems. The objective of this study was to test whether the addition of EM to substrates incubated in anaerobic digesters would increase the efficiency of waste treatment and biogas production. EM cultures were obtained from bacterial colonies captured within the A-horizon of a Brazilian forest soil. They were left to grow during 15 days on cooked rice contact with the soil; afterwards, the established colonies were separated according to their colors, discarding all shades of black, gray and white, according to recommendations from related literature. Remaining colonies were further grown in sugarcane broth medium for 18 days, being this the final EM culture. Twelve bench digesters were used, each with a total capacity for three liters. The experiment was composed by four treatments consisting of different concentrations of EM inoculum [15% (T1), 10% (T2), 1% (T3) and 0% (T4)] applied to dairy cattle manure, with three replications per treatment. Anaerobic digestion was carried out under controlled temperature (35oC) over 99 days. Data collected included concentrations of total, fixed and volatile solids (TS, FS and VS), pH and Chemical Oxygen Demand (COD). The pH of the EM inoculum was 3.34 and COD was 24.25 mg L-1. The best reduction efficiencies for COD and TS removal were 79.44% and 42.50%, respectively, in T4. Among the treatments with EM addition, 1% (T3) resulted in better COD reduction. The maximum accumulated biogas production was 20.60 L biogas L substrate-1, also for T3. In conclusion, EM as an inoculum in low concentrations may be advantageous to anaerobic digestion.

show abstract

Estudo qualiquantitativo do biogás produzido por substratos em biodigestores tipo batelada

Cited by 20 publications

References 16 publications

Biogas Production in Dairy Cattle Systems, Using Batch Digesters With and Without Solids Separation in the Substrates

Biogas Production in Dairy Cattle Systems, Using Batch Digesters With and Without Solids Separation in the Substrates

Use of Inoculum in Biodigesters With Cattle Manure Under Conventional and Organic Production Systems

Effective Microorganisms (Em) as Biofeeders for Anaerobic Digestion

Contact Info

Product

Resources

About