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Introduction: In Cuba, there is a tendency to decentralize productions with the creation of livestock modules where different livestock species coexist, such as swine, cattle and poultry. In this context, anaerobic digestion (AD) is an alternative for the decarbonization of the agricultural sector, since it generates energy during waste treatment. Objective: To evaluate the AD of swine manure (SM) and poultry manure (PM) with cattle manure (CM) in terms of biochemical methane potential (BMP), and kinetic parameters in mono and co-digestion. Materials and Methods: The trial was conducted in 2 L reactors at 27 °C (average). The BMP of SM, PM and CM was determined in mono-digestion, and then with addition of 15, 30 and 45 % of CM, to the PM40:SM60 mixture. To describe the kinetic behavior of the process, experimental data were fitted to three first and second order models. Results and Discussion: The experimental BMP with CM addition was higher than expected, with increase between 26-31 %, demonstrating the synergy of the mixtures; since the C/N ratio and the methanogenic archaeal community were improved. The models were adjusted to the experimental data with adjusted coefficients of determination higher than 90 %. Conclusions: The addition of CM increased the experimental methane yield over the expected one. The Hill model shows a maximum yield of 369 LCH4/kgVS for mixtures with 15 and 30 % CM. The best variant was with 15 %, and it is necessary to transport manure from 20 cows to the biodigester. [ABSTRACT FROM AUTHOR]

This research was carried out to determine the effect of corn stover silage with three non-protein nitrogen sources plus two carbohydrate sources on its mineral content. Nitrogen sources (NS) were agricultural urea (AU), dehydrated poultry litter (PL) and swine manure fresh (SM); and those of carbohydrates (CS) sugar cane molasses (SCM) and bakery by-products (BBP). After 30 d of fermentation, the microsilages were opened and the concentration of Ca, P, Na, K, Mg, Co, Cu, Mn, Fe, and Zn were measured. The results were subjected to analysis with a completely randomized design with a 3×2 factorial arrangement of treatments and under a mixed effects model. There were (P<0.01) NS×CS interactions on the mineral content of all silages. The PL+SCM silage was higher (P<0.01) in Ca, P, Na, Mg and K. The SM silage had higher (P<0.01) Cu content, and the PO-based treatments had higher (P< 0.01) Mn content. In general, the highest mineral content was observed in silages based on PL and SM. It is concluded that corn stover silage enriched with PL with SCM can provide macro and micro minerals in ruminant feed. [ABSTRACT FROM AUTHOR]

Introduction: The anaerobic digestion is an attractive process for a grains agro-industrial enterprise where several residues are produced. Different studies show the advantages of rice straw and rice dried residue with pig manure codigestion, however the effect of the mixture rice dried residue with pig and cow manure on anaerobic digestion kinetic have not been studied. Objective: To evaluate the methane production kinetic from different mixtures of rice dried residue with cow and pig manure in discontinuous system. Materials and Methods: The anaerobic digestion process was evaluated in discontinuous system at mesophilic conditions (35 ± 2 °C) for four mixtures, selected according to a Mixture design of extreme vertices. Four models of first and second order were used for the kinetic performance of the anaerobic digestion process description. Results and Discussion: The models explained between 98.54 until 99.90% the variability of obtained experimentally methane yield. The best methane yield (351.19 L/kg volatile solids) was obtained for the mixture with maximum percentage of rice dried residue. Conclusions: This study shows the potentialities of biogas production from residues generated in a grains agro-industrial enterprise. However, technology selection must be based in reactors with agitation, which must be evaluated in semicontinuous regime. [ABSTRACT FROM AUTHOR]

Copyright of Revista Colombiana de Ciencia Animal - RECIA is the property of Revista Colombiana de Ciencia Animal - RECIA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Ciencias Agricolas is the property of University of Narino, Faculty of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The evaluation of the addition of petrochemical residual clay (bentonite-base) during the anaerobic codigestion of swine manure and agriculture solid waste, to enhance methane production. The experiments were carried out in 10 L continuously stirred tank reactor (CSTR), at 35 ºC. The clay addition was assayed at different organic loading rate of swine manure. The CSTR performance was monitored by daily biogas and methane production and also by physic-chemical parameter, ammonia nitrogen and volatile fatty acid. The addition of clay at lower dosage, enhanced the biogas production up to 40 %, and the methane content near to 15 % for all organic loading rate of swine manure assayed. It was elucidated by the adsorbent properties of clay showing a reduction of ammonia nitrogen within reactor after clay addition. This was corroborated by Freundlich coefficient (between 1.43 and 1.82) and the adsorption capacity (between 1,29 and 2,98). The others physic-chemical parameters during CSTR performance showed lower volatile fatty acids concentrations (< 1 g.L-1), the pH between 7.4 and 8.4, the alkalinity ratio below 0.3 and lower free ammoniac concentration (< 0.15 g.kg-1), indicating the co-digestion process stability and the feasibility to use clay residual bentonite-base to enhance methane production in anaerobic treatment of manure and agriculture waste. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi is the property of Revista Brasileira de Engenharia Agricola e Ambiental and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletín Científico Centro de Museos de Historia Natural is the property of Universidad de Caldas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)