Sargassum is an indicator of progressive pollution in the seas because it causes lack of light and lack of oxygenation.It arrives in the Mexican Caribbean between the months of April and September,causing a bad smell ...Sargassum is an indicator of progressive pollution in the seas because it causes lack of light and lack of oxygenation.It arrives in the Mexican Caribbean between the months of April and September,causing a bad smell that it has after its decomposition,a heavy load of heavy metals,as well as being an inconvenience for the inhabitants because it causes losses for tourism in that region.There are several ways to take advantage of these algae and one of them is to generate biomass to obtain a biofuel.The objective of this study was to determine the viability of sargassum(two varieties)as a substrate to obtain biogas in anaerobic co-digestion with sludge from a WWTP(Wastewater Treatment Plant).Two forms of drying were also applied to the two varieties of algae.It was obtained that sargassum is a good component to co-digest because it does not destabilize the process and good biogas production is achieved.展开更多
The incorrect disposal of the waste generated in the municipalities contributes to water and soil contamination,resulting in a real concern in order to find an adequate disposal as well as obtain by-products that can ...The incorrect disposal of the waste generated in the municipalities contributes to water and soil contamination,resulting in a real concern in order to find an adequate disposal as well as obtain by-products that can be used to reduce CO2 emissions.Anaerobic digestion turns out to be the most efficient treatment,both in environmental and economic terms.The objective of this study is to evaluate the anaerobic co-digestion process in phases as an alternative for the treatment of municipal waste:sludge from water treatment plants and the biodegradable part of Municipal Solid Waste(MSW),for three HRTs(Hydraulic Retention Times).Testing results show up a max elimination of 70.68%in VS(Volatile Solids)and 74.01%in COD(Chemical Oxygen Demand).With these percentages of elimination on average,15.96 L/d of biogas was produced,for each kg of COD eliminated 0.56 m3 of biogas was produced and for each kg of SV 0.85 m3 and methane of 50.10%.展开更多
The objective of this study is, to interpret the influence of reinforced concrete walls addition in reinforced concrete frame structures considering behavior laws that reflects the actual behavior of such structures, ...The objective of this study is, to interpret the influence of reinforced concrete walls addition in reinforced concrete frame structures considering behavior laws that reflects the actual behavior of such structures, by means of Castem2000computer code （pushover analysis）. A finite element model is proposed in this study, using the TAKEDA modified behavior model with Timoshenko beams elements. This model is validated initially on experimental model. Then the work has focused on the behavior of a RC frame with 3 levels and three bays to better visualize the behavior of plastic hinges. Once the plastic hinge control parameters are identified （plastic rotation, ultimate curvature）, a strengthening by introduction of reinforced concrete walls （RC/wall） at the ends of the reinforced concrete frame （RC/ frame） has been performed. The results show that these RC walls significantly improve the behavior, by a relocation of efforts towards the central part of the beams.展开更多
文摘Sargassum is an indicator of progressive pollution in the seas because it causes lack of light and lack of oxygenation.It arrives in the Mexican Caribbean between the months of April and September,causing a bad smell that it has after its decomposition,a heavy load of heavy metals,as well as being an inconvenience for the inhabitants because it causes losses for tourism in that region.There are several ways to take advantage of these algae and one of them is to generate biomass to obtain a biofuel.The objective of this study was to determine the viability of sargassum(two varieties)as a substrate to obtain biogas in anaerobic co-digestion with sludge from a WWTP(Wastewater Treatment Plant).Two forms of drying were also applied to the two varieties of algae.It was obtained that sargassum is a good component to co-digest because it does not destabilize the process and good biogas production is achieved.
文摘The incorrect disposal of the waste generated in the municipalities contributes to water and soil contamination,resulting in a real concern in order to find an adequate disposal as well as obtain by-products that can be used to reduce CO2 emissions.Anaerobic digestion turns out to be the most efficient treatment,both in environmental and economic terms.The objective of this study is to evaluate the anaerobic co-digestion process in phases as an alternative for the treatment of municipal waste:sludge from water treatment plants and the biodegradable part of Municipal Solid Waste(MSW),for three HRTs(Hydraulic Retention Times).Testing results show up a max elimination of 70.68%in VS(Volatile Solids)and 74.01%in COD(Chemical Oxygen Demand).With these percentages of elimination on average,15.96 L/d of biogas was produced,for each kg of COD eliminated 0.56 m3 of biogas was produced and for each kg of SV 0.85 m3 and methane of 50.10%.
文摘The objective of this study is, to interpret the influence of reinforced concrete walls addition in reinforced concrete frame structures considering behavior laws that reflects the actual behavior of such structures, by means of Castem2000computer code （pushover analysis）. A finite element model is proposed in this study, using the TAKEDA modified behavior model with Timoshenko beams elements. This model is validated initially on experimental model. Then the work has focused on the behavior of a RC frame with 3 levels and three bays to better visualize the behavior of plastic hinges. Once the plastic hinge control parameters are identified （plastic rotation, ultimate curvature）, a strengthening by introduction of reinforced concrete walls （RC/wall） at the ends of the reinforced concrete frame （RC/ frame） has been performed. The results show that these RC walls significantly improve the behavior, by a relocation of efforts towards the central part of the beams.
