Sugarcane is the most produced agricultural commodity in tropical and subtropical regions, where it primarily used for production of sugar ethanol. The latter mostly to produce alcoholic beverages as well low carbon biofuel. Despite well-established chains, their respective residues by-products present unexploited potentials further product portfolio diversification. These fully or partially untapped streams are a) sugarcane trash straw that usually remain on fields after mechanized harvest,...

Biomethanation is a promising solution to convert H2 (produced from surplus electricity) and CO2 CH4 by using hydrogenotrophic methanogens. In ex situ biomethanation with mixed cultures, homoacetogens methanogens compete for H2/CO2. We enriched microbiota on as sole carbon energy sources, respectively, investigate these competing reactions. The microbial community structure dynamics of bacteria methanogenic archaea were evaluated through 16S rRNA mcrA gene amplicon sequencing, respectively....

Microbial fuel cells (MFCs) are bio-electrochemical devices used to generate bioelectricity from a wide range of substrates by using bioelectrogenic microorganisms, and have special interest supply the energy demands for small same time as renewable source. In this study, blend soil-organic matter were tested in membrane-less single chamber microbial (SMFC) along with biotransformation organic wastes, over testing 60 days without renovation substrate batch mode operation. The results...

Ex situ biomethanation allows the conversion of hydrogen produced from surplus electricity to methane. The flexibility process was recently demonstrated, yet it is unknown how intermittent feeding impacts functionality microbial communities. We investigated effect starvation events on consumption and methane production rates (MPRs) two different methanogenic communities that were fed with carbon dioxide. Both showed functional resilience in terms MPRs upon periods up 14 days. origin...

Microbial fuel cells represent an innovative technology which allow simultaneous waste treatment, electricity production, and environmental monitoring. This study provides a preliminary investigation of the use terrestrial Single chamber Fuel Cells (SMFCs) as biosensors. Three were created using Andean soil, each one for monitoring BOD concentration synthetic washed rice wastewater (SRWW) 10, 100, 200 mg/L SMFC1, SMFC2 SMFC3, respectively. The results showed transient, exponential, steady...

The Pachnoda marginata larva have complex gut microbiota capable of the effective conversion lignocellulosic biomass. Biotechnological utilization these microorganisms in an engineered system can be achieved by establishing enrichment cultures using a substrate. We established from contents midgut and hindgut beetle wheat straw alkaline medium at mesophilic conditions. Two different inoculation preparations were used: procedure 1 (P1) was performed sterile bench under oxic conditions 0.4%...

Mixed or pure cultures can be used for biomethanation of hydrogen. Sodium 2-bromoethanesulfonate (BES) is an inhibitor methanogenesis to investigate competing reactions like homoacetogenesis in mixed cultures. To understand the effect BES on hydrogenotrophic metabolism a process, anaerobic granules from wastewater treatment plant, enrichment culture, and Methanococcus maripaludis Methanobacterium formicicum were incubated under H2/CO2 headspace presence absence BES, turnover H2, CO2, CH4,...

In order to partially mimic the efficient lignocellulose pretreatment process performed naturally in gut system of Pachnoda marginata larvae, two wheat straw pretreatments were evaluated: a mechanical via cutting into different sizes and an alkaline with calcium hydroxide. After pretreatment, enrichment cultures on at pH inoculated kept mesophilic conditions over 45 days. The methanogenic community was composed mainly Methanomicrobiaceae Methanosarcinaceae families. combined size reduction...

Microbial electrolysis cell (MEC) is one of the promising and cutting-edge technologies for generating hydrogen from wastewater through biodegradation organic waste by exoelectrogenic microbes. In MECs, operational parameters, such as applied voltage (Eap), anode surface area, anode-cathode distance, N2/CO2 volume ratio have a significant impact on yield production. present study, to enhance current production MEC, effects key conditions MEC performance were extensively investigated. The...

The effects of the inoculum origin, temperature or operational changes on ex situ biomethanation by complex microbial communities have been investigated; however, it remains unclear how diversity influences process and its stability. We explored effect four inocula (coded as PF, WW, S37 Nrich) methane production, stability formation volatile fatty acids by-products. highest amounts produced were 3.38 ± 0.37 mmol, 3.20 0.07 3.07 0.27 mmol 3.14 0.06 for Nrich, respectively. acetate...

Thermal performance of water inside a glass evacuated tubes solar colector under the action radiation in Equator Andean high lands is presented. The aim to deepen understanding relations between temperature and inclination single-ended tubes. A salient feature this study employment sensors located manifold. data logger was used collect during experiment from early morning till boiling point water. collected shows highest values temperatures for larger angles at earlier stages experiment....

Abstract Biomethanation is a promising solution to convert H 2 produced from surplus electricity and CO CH 4 by using hydrogenotrophic methanogens. In ex situ biomethanation with mixed cultures, homoacetogens methanogens compete for /CO . We enriched microbiota on as sole carbon energy sources, respectively, investigate these competing reactions. Microbial community structure dynamics of bacteria methanogenic archaea were evaluated through 16S rRNA mcrA gene amplicon sequencing,...

ResumenSe monitoreó la generación de electricidad bacterias electrogénicas en celdas combustibles microbianas cámara simple (CCMs), usando electrodos fibra carbono, con dos inóculos.El primer inóculo se preparó suelo no intervenido y residuos sólidos orgánicos región amazónica Ecuador el segundo alto andina Ecuador.Se proceso durante 171 días sin renovación del combustible microbiano.Se emplearon CCMs volúmenes 20 L, 12 L 4 observándose influencia voltaje salida.El mejor experimento fueron...

The unemployment of people in the Amazonian communities Ecuador has increased during pandemic caused by Covid-19 disease, mainly from March to August 2020; so, population turned its attention agricultural sector. This economic sector is specifically directed towards overexploitation timber resources and hunting animals. study proposes an Environmental Management Plan for three farms located San Pablo de Ushpayaco parish, Napo, Ecuador, which sell mostly organic products local markets....

In this study, a novel miniature terrestrial microbial fuel cells (TMFCs) inoculated with commercial garden soil was developed to generate bioelectricity. The startup and stabilization were evaluated as open circuit voltage (OCV). effect of an enrichment procedure 12 mM, 37 61 mM Na-acetate under anaerobic conditions assessed. initial OCV 0.55 ± 0.02 V, 0.58 0.01 V 0.75 0.15 in the TMFCs Na-acetate, respectively. increased relation substrate input. average during stable operation follows:...