Anaerobic Digestion
Mostrando 25-36 de 134 artigos, teses e dissertações.
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25. Biogas production: litter from broilers receiving direct-fed microbials and an enzyme blend
ABSTRACT The effect of additives used in the feed of broilers on anaerobic bio-digestion of poultry litter was evaluated. Four diets were used: NC: negative control; DFM: NC + 500 ppm direct-fed microbials (DFM) containing Bacillus subtilis and Bacillus licheniformis; ENZ: diet formulated with an enzyme blend (20 ppm phytase, 200 ppm protease and 200 ppm xyl
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-10
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26. ASSESSMENT OF OZONE AS A PRETREATMENT TO IMPROVE ANAEROBIC DIGESTION OF VINASSE
Abstract This paper presents an assessment of ozone oxidative effects on the biodegradability of sugar cane vinasse, aiming at increasing the methane yield by anaerobic digestion of this effluent. Furthermore, as a new approach, an economic balance of this process was made. Using a bench scale reactor, ozone was applied at 60, 120, 180, 240 mgO3.gCOD-1 doses
Braz. J. Chem. Eng.. Publicado em: 2016-06
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27. Bacterial ecology of abattoir wastewater treated by an anaerobic digestor
Abstract Wastewater from an anaerobic treatment plant at a slaughterhouse was analysed to determine the bacterial biodiversity present. Molecular analysis of the anaerobic sludge obtained from the treatment plant showed significant diversity, as 27 different phyla were identified. Firmicutes, Proteobacteria, Bacteroidetes, Thermotogae, Euryarchaeota (methano
Braz. J. Microbiol.. Publicado em: 2016-03
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28. Co-digestion of swine excreta associated with increasing levels of crude glycerin
ABSTRACT The objective of this research was to evaluate the performance of anaerobic co-digestion of swine excreta associated with increasing doses of crude glycerin and different hydraulic retention times (HRT). A completely randomized design was adopted in a 3 × 4 factorial arrangement composed of three HRT (10, 17, and 24 days) and four crude glycerin do
R. Bras. Zootec.. Publicado em: 2016-03
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29. Odor from anaerobic digestion of swine slurry: influence of pH, temperature and organic loading
Farm slurry management from storage and/or treatment is the main source of odors from swine production, which are determined by factors such as operational variations (organic loading), cleaning of facilities and animal diet (pH) or environmental conditions (temperature). The aim of this study was to evaluate the influence of pH, temperature and organic load
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-12
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30. Enhancement of anaerobic digestion of microcrystalline cellulose (MCC) using natural micronutrient sources
The effect of adding four minerals as micronutrient sources to stimulate the anaerobic process of microcrystalline cellulose (MCC) was investigated. Three mineral doses (5, 10 and 15 mg/L) were evaluated and the response to trace metal addition was monitored by the methane yield (Y CH4) and specific methanogenic activity (SMA). A clear stimulation of the Y C
Braz. J. Chem. Eng.. Publicado em: 2014-06
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31. Methane production in anaerobic digestion of organic waste from Recife (Brazil) landfill: evaluation in refuse of diferent ages
This work focuses on monitoring the generation of biogas by biochemical methane potential (BMP) assays, commonly used to assess anaerobic biodegradability of solid and liquid wastes under controlled conditions. The experiment employed 5 g of substrate of both refuses (fresh and one-year-old wastes), digested with 250 mL of inoculum in 1 L flasks as bioreacto
Braz. J. Chem. Eng.. Publicado em: 2014-06
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32. Spirulina sp. LEB-18 culture using effluent from the anaerobic digestion
The carbon source is the most expensive nutrient for Spirulina production; effluents from anaerobic digestion contain this nutrient in the form of HCO3-. The aim of this study was to assess the growth kinetics, composition and fatty acid profile of Spirulina sp. LEB-18 grown in standard Zarrouk medium (NaHCO3 16.8 g L-1) and in Zarrouk medium replaced with 2
Braz. J. Chem. Eng.. Publicado em: 2013-06
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33. Septic tank combined with anaerobic filter and conventional UASB: results from full scale plants
Anaerobic digestion is an important alternative for domestic wastewater treatment, especially in warm climate regions. Two full-scale anaerobic schemes were investigated: septic tank combined with anaerobic filter (S T A NF) and conventional UASB reactors. Treated effluents from these systems were subjected to disinfection by chlorination. The operational pe
Braz. J. Chem. Eng.. Publicado em: 2013-03
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34. The efficiency of concentration methods used to detect enteric viruses in anaerobically digested sludge
The presence of enteric viruses in biosolids can be underestimated due to the inefficient methods (mainly molecular methods) used to recover the viruses from these matrices. Therefore, the goal of this study was to evaluate the different methods used to recover adenoviruses (AdV), rotavirus species A (RVA), norovirus genogroup II (NoV GII) and the hepatitis
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-02
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35. Microbial diversity associated with the use of sulfide as electron donor for nitrogen removal from wastewater of reactors applied to anaerobic treatment of sewage / Diversidade microbiana associada ao uso de sulfeto como doador de elétrons para a remoção de nitrogênio de efluentes de reatores anaeróbios aplicados ao tratamento de esgotos sanitários
The widespread nitrate contamination in concentrations higher than recommended by legislation has raised interest in technologies for water and wastewater treatment. Biological nitrogen removal is relatively low cost and higher efficiency. Sulfide as electron donor can be oxidized to elemental sulfur or sulfate by sulfide oxidizing bacteria that can use nitr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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36. Co-DigestÃo AnaerÃbia de Microalgas e de Glicerol Residual do Biodiesel / Co-Anaerobic Digestion of Microalgae and Glycerol from Biodiesel Residual
As microalgas, seres microscÃpicos com capacidade fotossintÃtica, produzem oxigÃnio na presenÃa de energia luminosa. Devido a isso as microalgas sÃo utilizadas para tratamento de esgotos em lagoas de estabilizaÃÃo, porÃm essa atividade gera uma grande quantidade de biomassa algal. Tendo em vista a produÃÃo dessa biomassa e sua destinaÃÃo em corpo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2012