LECHOS NITRIFICANTES PDF

Construccion de lecho nitrificante. Construccion de lecho nitrificante. Image may contain: one or more people and outdoor. English (US); Español · Français. Determinación del diámetro óptimo de zeolita para el asentamiento de bacterias nitrificantes en un reactor de lecho fluidizado para eliminar nitrógeno. Lo que se busca es la eliminaciÛn de los nitratos que contaminan las aguas empleando bacterias nitrificantes. El soporte que se emplea para que las bacterias.

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For the microbial adhesion tests, assemble of 16 mini digesters were used with a volume of mL, for each one of lehos zeolite diameters Fig. Implementation of aerobic fluidized bed reactor. Applied Geochemistry 26, pp. The constant levels of biomass must to be maintained. Nitrifying intrificantes are sensitive to multiple substances heavy metals, organic compounds, free ammonia, etc. L -1 thirteenth day was observed.

Environmental Toxicology and Chemistry 31 6pp. The KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.

The best removal was obtained for the 0. The building, design and dimensioning of the aerobic fluidized bed reactor have been based on previous works [1, 17]. The supporting material used was zeolite of the chosen diameter. Nitrification consists in the biological oxidation aerobic process of ammoniacal nitrogen in a first step to nitrite and its oxidation to nitrate, carried out by autotrophic ammonia-oxidizing bacteria Nitrosomonas and nitrite-oxidizing Nitrobacterrespectively [18].

Thus a 1 mm zeolite diameter was used in the implementation and operation of the fluidized bed aerobic reactor. This state corresponds with the maximum of the adhesion curves.

Tuning of the aerobic fluidized bed reactor As a general fact, one can conclude that the zeolite was a good support for microorganism population, in this case of nitrifying bacteria for the removal of nitrogen. June 4 th Once confirmed that no leakage or conduction problems occurred, 8 L of the synthetic industrial waste liquid were introduced within the column. One advantage of fluidized bed reactor is the large surface available for adhesion, where the biofilm can grow.

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Navarro and Palladino proved the effectiveness of an aerobic fluidized bed reactor using as support: Tuning of the reactor. Mini-digesters were grouped in pairs, for each zeolite diameter. In this work, the zeolite used had a density of 2 g.

Graphs and results for each performed analyses are presented below. Then the structure was mounted and the system switched on.

Nitrification consists in the biological oxidation aerobic process of ammoniacal nitrogen in a first step to nitrite and its oxidation to nitrate, carried out by autotrophic ammonia-oxidizing bacteria Nitrosomonas and nitrite-oxidizing Nitrobacterrespectively [18]. The supporting material used was zeolite of the chosen diameter. However, 1 mm is chosen to achieve higher adhesion values.

There activated carbon support was used, with a density ranging from 0. L -1 was observed. L -1 that was reached on the fourteenth day.

ComparablePropertiesIn , Comparable Properties

At the experiment end TSS values were constant. Login or register free and only takes a few minutes to participate in this question. The liquid industrial waste had the same composition as that used in the mini-digesters Tables 1 and 2.

Author wants to give thanks to University of Vigo for the financial support given. COD T results are shown in Fig. The final value corresponding to a drastic increase till mg. Widespread pollution produces problems such as toxic algae blooms that after intake through food or water can lead to various physiological disorders and symptoms of intoxication [], eutrophication [6,7], acidification of rivers and lakes with low or reduced alkalinity [], direct toxicity of nitrogenous compounds in aquatic animals [13] and adverse effects on human health [].

These substances can interfere with the cell metabolism, reducing the rate of formation nitrificnates intermediates compounds [32]. For these bacteria to develop physiologically, a proper support material should be chosen to take into account the biological process itself, the equipment size and experimental conditions that nitrificanes will find.

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A purge was also available for use if necessary.

The extracted zeolite was placed on a filter paper on a capsule and introduced into a hot oven for six hours to ensure complete drying of the support. Automatic update in Excess biomass can be removed by friction between particles or transported to a device where the biomass is separated from the particles; these are incorporated back into the bed [27].

Environmental International lechod, pp.

Lechos nitrificantes | Spanish to English | Architecture

Identification and qualification of microorganism in activated sludge and biofilms by FISH. Nitrifying bacteria are sensitive to multiple substances heavy metals, organic compounds, free ammonia, etc. The final value corresponding to a drastic increase till mg.

Wiley and Sons, New York, The pH value affects lecchos environmental conditions for a favourable physiological development of microorganisms, and also has a great influence on the inhibition degree of the nitrifying bacteria. The installation also had a 20 cm high pyramidal settler with a weir at the top for discharge of treated effluent and a bottom outlet for recycling.

Taller de LECHO Nitrificante

L -1 on the sixteenth day and a slight increase until the end of the experiment. Removal of nitrogen present in the wastewater resulting from domestic and industrial activities is usually carried out combining biological processes of nitrification and denitrification, since costs are lower compared to the physical and chemical processes.

In conclusion, operating with a feed rate of 1. Each sampling day, the zeolite and liquid of both mini-digesters from one of the pair for the three different zeolite ntirificantes were analyzed. Received in revised form: